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#1 AAGR

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Posted 04 December 2011 - 19:35

Almost the last time I had a real job, it was with the Rootes Group (a.k.a. Chrysler UK from 1970) in Coiventry.

I can confirm that a real on-going project at the end of the 1960s (i.e. post Cosworth FVA, and almost at the same time as the Cosworth BDA), was that the company commissioned a BDA-type project with BRM, for them to produce a 16-valve twin-cam version of the new Avenger engine, which was (I remind you) not announced until February 1970.

At that time, Avenger engines were either 1.2-litre or 1.5 litres, the enlarged 1.3/1.6-litre types not being launched until 1973/1974.

Two points - it was Product Planning/Engineering, NOT the 'works' Competitions Department, which commissioned the engine, and I am 99% sure that the first engines were all built around the 1.6-litre block. No larger versions ever existed in production in the UK - for as most of you will know, the 'Brazilian' block referred to engines built by a Chrysler subsidiary in South America.

Now (thank you for waiting ....) BRM eventually produced a handful of 1.6-litre engines which, frankly, were a disappointment, but somehow the ever-resourceful Competition Manager, Des O'Dell, got the engine homologated in the Avenger. How ? I wish we knew, for according to the rules, at least 400 engines/cars needed to have been made.

But - how many Avenger-BRMs were ever built ? Not on production lines at Coventry or (later) Linwood, for sure - and when have you ever seen a 'standard' road car ?

So that's the point of this rambling post - how many of those BRM engines were built, who built them, and how many Avenger-BRM cars (apart from the odd 'works' rally car were ever produced ?

Answers, please, on a postcard ....

GRAHAM ROBSON




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#2 sterling49

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Posted 04 December 2011 - 19:41


I think Colin Malkin drove a special engined Avenger in the British Open series, I recall that it was not much faster than the rapid Gp 1 Avengers of the time. However, I was always a fan of the model with the half vinyl roof (Tiger) on Minilites, fabulous !



#3 RS2000

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Posted 04 December 2011 - 20:43

We have several posts on this somewhere - possibly in a thread on BRM (Ford) twin cam engines?

As for homologation (above), up to the end of 75, Gp2 allowed option cylinder heads to be recognised without mainstream production eg. the Holbay 16 valve head for the Escort RS2000 and the disappointing Opel 16 valve head intended for the Ascona"A" but used on the Kadet "C" GTE in 76.
For 76 (later extended to include 77) 75 spec Gp2 cars were allowed to compete Internationally but entered in the appropriate capacity class in the Gp4 category. As I understood it, the works 16 valve Avenger ran under these rules, initially driven by Malkin, then by Sclater, after a "disagreement" between O'Dell and Malkin about where the problem lay...which proved the problem wasn't Malkin... I think Nigel Rockey may have driven a second car on one event?

This Gp4 aspect seems to be the origin of the widespread forceful assertion today, by every "fan" and aftermarket business who was never there, that all "works spec" BDA Escorts are "Gp4". Nonsense of course, as the separately homologated "RS" only ran as a works car in 78 and 79. I look forward to an expert like AAGR giving them a good kicking in this eagerly awaited definitive book and putting this to bed once and for all!

Edited by RS2000, 04 December 2011 - 20:45.


#4 BRG

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Posted 04 December 2011 - 20:45

How ? I wish we knew, for according to the rules, at least 400 engines/cars needed to have been made.

I would say, the same way that Volvo homologated their Gp A 240 Turbo, or several manufacturers homologated their Gp B rally cars. Not to put to fine a point on it, they cheated. Who didn't back then (apart from the naive ARG who actually made all those MG Metro 6R4s)?

Brazilian blocks were a bit of a...hmmm, let's say...... flexible interpretation of the rules, weren't they? Along with flat front RS2000s?

It might be better to ask who (apart from ARG as above) really complied with the rules...

#5 RS2000

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Posted 04 December 2011 - 21:00

Brazilian blocks were a bit of a...hmmm, let's say...... flexible interpretation of the rules, weren't they? Along with flat front RS2000s?
It might be better to ask who (apart from ARG as above) really complied with the rules...


For some of the earlier dubious homologations, there wasn't at the time actually a requirement to build the requisite number, just show "provisions for" production.
Iranian carbs (twin 40s) on the Avenger GT in Gp1 (not the Tiger in Gp2, which genuinely had them) was another Des O'Dell masterpiece.
"Australian production" flat front RS2s in Gp1 under "evolution rules" (500) was safer than we realised at the time, with knock down kits being assembled in Aus as an "Escort 2 litre". No one has shown me 500 but it may not have been so far out.

The real stunner around that time was: who pointed out to the RACMSA/FIA that the Mk1 Mexico had the same block as the RS1600 that had already been homologated at 1601cc, not its true average of 1598, so couldn't be claimed as a 1600 car? So no Mexicos in the 1600 Gp1 class with similar "emission" kits like the RS2 gained. Which car was it that then cleaned up 1600 Gp1? Let me think...wasn't it the Avenger.....?

Edited by RS2000, 04 December 2011 - 21:01.


#6 RS2000

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Posted 04 December 2011 - 22:03

Back to the question, I do recall an article in one of the now defunct classic car magazines that featured what seemed to be an otherwise standard GT with the BRM 1.6 16valve engine. A member of a then owners club? Maybe an ex-development car or simply someone who got hold of a factory engine and fitted it? I certainly can't recall ever seeing or hearing of such a car in any sort of real "production" - and I was around motor club people who were deeply into rally Avengers then and probably would have been interested. Someone like Gordon Jarvis (then rallying a Tiger and working for a dealer, talking with Des O'Dell) might be worth asking. Is there still an owners club to approach?

Edited by RS2000, 04 December 2011 - 22:03.


#7 Mistron

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Posted 04 December 2011 - 22:15

My pal bought a Jeffrey J4 (early '70s Lotus 7 style kit cat) and the previous owner had run an avenger BRM engine in it, but removed it prior to the sale. I bumped into this guy recently and mentioned the engine, and I'm sure he said he still had it.


#8 RCH

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Posted 05 December 2011 - 09:55

The real stunner around that time was: who pointed out to the RACMSA/FIA that the Mk1 Mexico had the same block as the RS1600 that had already been homologated at 1601cc, not its true average of 1598, so couldn't be claimed as a 1600 car? So no Mexicos in the 1600 Gp1 class with similar "emission" kits like the RS2 gained. Which car was it that then cleaned up 1600 Gp1? Let me think...wasn't it the Avenger.....?


I was under the impression that Ford made the basic mistake of trying to homologate the RS1600 and Mexico (same block, same bore & stroke, different capacities) at the same time? Some bright spark :confused: at the FIA thought, "This can't be right" although the idea that "someone" tipped them the wink is interesting.

Actually I think it may have done them a favour, had the Mexico been in the 1600cc. class it may just have been another Escort. As it was I like to think that not being in its proper class led to Ford devising the Mexico Championship which founded the Mexico "legend".

#9 AAGR

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Posted 05 December 2011 - 10:15

I was under the impression that Ford made the basic mistake of trying to homologate the RS1600 and Mexico (same block, same bore & stroke, different capacities) at the same time? Some bright spark :confused: at the FIA thought, "This can't be right" although the idea that "someone" tipped them the wink is interesting.

Actually I think it may have done them a favour, had the Mexico been in the 1600cc. class it may just have been another Escort. As it was I like to think that not being in its proper class led to Ford devising the Mexico Championship which founded the Mexico "legend".
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Sorry, no, not possible. The RS1600 was launched in January 1970, and homologated on 1 October 1970. The Mexico was not even anounced until December 1970.

It was Stuart Turner's idea to quote the RS1600 as 1,601cc so that the engine could then be expanded to its limits while still staying in the 2-litre class. If it had been homologated as 1,598cc, no enlargement would ever have been allowed in events where Group 2 homologation rules applied..

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#10 RCH

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Posted 05 December 2011 - 10:34

Great to see you posting here Graham, I'm not sure where I got that idea from but I'm sure I've seen it in print somewhere...

#11 elansprint72

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Posted 05 December 2011 - 11:48

Off topic but perhaps of passing interest as it concerns a (later) Avenger built with a somewhat different engine. This is one of two Avenger estates built as service barges to support the WCR Sunbeam Lotus effort. They were fitted with road-going Sunbeam Lotus engines.

Posted Image

As you can see they were two-seaters with a hefty expamet partition behind the seats.


Edited by elansprint72, 05 December 2011 - 16:45.


#12 Pullman99

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Posted 05 December 2011 - 13:09

Off topic but perhaps of passing interest as it concerns a (later) Avenger built with a somewhat different engine. This is one of two Avenger estates built as service barges to support the WCR Sunbeam Lotus effort. They were fitted with road-going Sunbeam Lotus engines.As you can see they were two-seaters with a hefty expamet partition behind the seats.


What a great survivor. Talbot Badge as well (!) Was the pic taken at one of the NEC Classic Motor Shows, or is that Race Retro?




#13 elansprint72

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Posted 05 December 2011 - 13:41

What a great survivor. Talbot Badge as well (!) Was the pic taken at one of the NEC Classic Motor Shows, or is that Race Retro?

Ian,
Actually it was at the 2005 Club Lotus show at Donington. I can just about read some of the inscription and it seems the car was restored by a chap in Stoke on Trent.
Unfortunately I didn't photograph the words properly (yet again :cry: ) here is the only other shot I have.

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#14 RS2000

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Posted 05 December 2011 - 15:54

Actually I think it may have done them a favour, had the Mexico been in the 1600cc. class it may just have been another Escort. As it was I like to think that not being in its proper class led to Ford devising the Mexico Championship which founded the Mexico "legend".


It may have benefitted Ford overall (although success in 1600 Gp1 with an "emission kit" etc. against the Avenger GT might have been better publicity) but it was a real pain for private entrants in Internationals. In those days, under Gp2, a good club engine and a suitable International engine could be the same thing. If you had a 1600 Xflow Escort it meant you couldn't use it Internationally with any real hope of class positions. A twin cam was never really the best bet for reliability on long events, even in mild spec for a private entrant. The only affordable choice (ie. no BDAs) was going 1300 (a relatively easy swap) or a 2000 Pinto (a relatively major conversion involving all ancilliaries) or, as someone I knew did, stick it in a Capri! (not a lot heavier actually but dire handling on the loose...). Oh how we hated Ford for that single act...

#15 Pullman99

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Posted 06 December 2011 - 07:21

Actually it was at the 2005 Club Lotus show at Donington. I can just about read some of the inscription and it seems the car was restored by a chap in Stoke on Trent.


Thanks for that. Should have recognised the Donington Exhibition Centre. So that's two Talbot pics in two days!

#16 RCH

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Posted 06 December 2011 - 08:17

It may have benefitted Ford overall (although success in 1600 Gp1 with an "emission kit" etc. against the Avenger GT might have been better publicity) but it was a real pain for private entrants in Internationals. In those days, under Gp2, a good club engine and a suitable International engine could be the same thing. If you had a 1600 Xflow Escort it meant you couldn't use it Internationally with any real hope of class positions. A twin cam was never really the best bet for reliability on long events, even in mild spec for a private entrant. The only affordable choice (ie. no BDAs) was going 1300 (a relatively easy swap) or a 2000 Pinto (a relatively major conversion involving all ancilliaries) or, as someone I knew did, stick it in a Capri! (not a lot heavier actually but dire handling on the loose...). Oh how we hated Ford for that single act...


I hadn't seen it that way I suppose, to me it seemed like Ford had at last shot themselves in the foot and allowed some other manufacturer a sniff of winning something :)

#17 Frank de Jong

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Posted 06 December 2011 - 20:08

Graham, I'm quite sure that no 16-valve Avenger was ever completed as such; for the very same reason you won't find a 24-valve Capri RS 3100 or a 24-valve BMW CSL out on the streets.
Only 100 different cilinder heads had to be produced to be homologated in Group 2 1970-1975, not necassarily attached to a car; you'll find cross-flow heads homologated for the Opel Commodore, 4-valve heads for the BMW 2002 (2 different ones!), Escort 1000, 1100 and 1300 and Opel Kadett - and for the 1600 cc Avenger, to my surprise - I didn't know that.

#18 AAGR

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Posted 06 December 2011 - 21:11

Graham, I'm quite sure that no 16-valve Avenger was ever completed as such; for the very same reason you won't find a 24-valve Capri RS 3100 or a 24-valve BMW CSL out on the streets.
Only 100 different cilinder heads had to be produced to be homologated in Group 2 1970-1975, not necassarily attached to a car; you'll find cross-flow heads homologated for the Opel Commodore, 4-valve heads for the BMW 2002 (2 different ones!), Escort 1000, 1100 and 1300 and Opel Kadett - and for the 1600 cc Avenger, to my surprise - I didn't know that.



Good.Thanks. As I thought ....

AAGR

#19 098765

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Posted 12 June 2015 - 00:27

Amazing to run across this thread after so many years. Many, many moons ago when American Chrysler came over to "sort out" British Chrysler, the order was given to sell off as fast as possible all the inventory of vehicles sat in the various parking lots.

Deals were made for so many cars at x pounds apiece, regardless of model/trim/options. The circling car dealers had a field day, sending transporter after transporter out the gates.

 

One of those transporters turned up in our neck of the woods, Avengers of all colors on it. On the top deck was a green four door with alloy wheels, a rarity in those days, especially straight from the factory. But after all they were Avengers and our stock in trade back then were Escorts, 240Z, Datsun 210 coupe, run of the mill rally cars.

 

The driver unloads the lower section, lowers the top section, we hear an engine start and everybody as one turned to look. The green four door sounded like a twink. Wait a minute Avengers don't have twinks. We gather around as the driver pulls it off and parks. Tiny little oblong badges on each front fender and one on the trunk say BRM.

 

Open the hood and everybody looks at each other like, BRM?

 

I asked my friend who had bought three transporters of Avengers (?) how much did he pay extra for the green one, his answer, they were all the same price.

 

So the quest began to find out what the specs were. Multiple calls to Dealerships only confused us more, no idea what you have, how you got it or who did it.

 

More phone calls, this time to the factory, and after a few dead ends and leaving messages with a call back number an engineer, whose name I cannot for the life of me remember called.

 

First question was how did we get it, explained that, his answer was that it was one of the test cars assigned to him and should never been parked along with the regular Avengers, let alone sold for what it was.

 

Asked if they wanted it back, he said no, it would take too much explaining to do. But would we please keep a running log of the performance, oil changes, any issues we encountered, the send that to him.

In return he provided all the information we needed.

 

Turns out this venture with BRM was to try and compete with the success of the Escort Mexico in the marketplace. The engine was sent to BRM to be Topped and Tailed, new head and lower end. The clutch was the one used in the Police cars (apparently they had heavy left feet) larger exhaust system and uprated suspension.

 

We did hammer it around a bit, the handling wasn't as good as the Escort and what turned out to be the Achilles heel of a not bad engine was the single row timing chain. It just wasn't up to the task, something that was acknowledged by the factory in one of our many conversations.

 

The novelty wore off, we sold it, the new owner continuing to have timing chain issues.

 

If the finances had been better, more time and engineering devoted instead of rushing to catch up it may have been able to at least give the Escorts a bit of a run for their money.

 

Just my tuppence worth.



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#20 Lee Nicolle

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Posted 12 June 2015 - 04:10

For some of the earlier dubious homologations, there wasn't at the time actually a requirement to build the requisite number, just show "provisions for" production.
Iranian carbs (twin 40s) on the Avenger GT in Gp1 (not the Tiger in Gp2, which genuinely had them) was another Des O'Dell masterpiece.
"Australian production" flat front RS2s in Gp1 under "evolution rules" (500) was safer than we realised at the time, with knock down kits being assembled in Aus as an "Escort 2 litre". No one has shown me 500 but it may not have been so far out.

The real stunner around that time was: who pointed out to the RACMSA/FIA that the Mk1 Mexico had the same block as the RS1600 that had already been homologated at 1601cc, not its true average of 1598, so couldn't be claimed as a 1600 car? So no Mexicos in the 1600 Gp1 class with similar "emission" kits like the RS2 gained. Which car was it that then cleaned up 1600 Gp1? Let me think...wasn't it the Avenger.....?

RS2000s were fairly common here in Oz. 76 77 78. How many were made I dont know but there was plenty, along with mainstream 'normal' 2 litre Escorts. Generally in Ghia guise but later on I feel the 2 litre was available in all models. There was 'Rallypacks' later with the std nose.78 79. I dont know as if the RS was available by then.

The RS6000 though was far more interesting!



#21 275 GTB-4

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Posted 12 June 2015 - 04:10

What a terrific first post Mr 098765...but how are you going to top that! :clap:



#22 kayemod

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Posted 12 June 2015 - 10:28

On the BRM engined Avengers, here are a few lines on the subject from Graham Robson's book Cosworth - the search for power.

 

Then there was the time in the early 70s that Chrysler-UK's motorsport department couldn't make the 16-valve Avenger BRM engine work, and took a head along to Cosworth to ask for advice. Keith helpfully looked at the head, squinting at the chamber and ports from every angle, grinned, then roared with laughter, and suggested that the engine should be junked. Chrysler UK didn't like what they were told, but the fact is that the engine never worked properly, and it was eventually junked.

 

No doubt Chrysler company politics had something to do with that, but if they'd swallowed their pride and paid Cosworth to do a decent new head for them, who knows what might have happened?



#23 AAGR

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Posted 12 June 2015 - 13:57

  Unhappily, there were very few people at Chrysler-UK (in any position of responsibility, at least) who could influence the philistine USA parent company's thinking. If you had mentioned 'Cosworth' to most Americans, they would simply not have known anything about them.

 

  Peter Wilson (No. 2 in engineering at Chrysler-UK, who had raced at Le Mans for both Bristol and MG, as I recall) was one of those who understood, and of course Des O'Dell was another. Between them, they later cooked-up the Sunbeam-Lotus,  but no-one else in the company even seemed to understand ....


Edited by AAGR, 12 June 2015 - 13:57.


#24 275 GTB-4

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Posted 13 June 2015 - 00:41

SOT, brings back memories of the London to Sydney Marathon 1968

https://en.wikipedia...Sydney_Marathon

I was roote-ing for Hopkirk and whilst the Lucien Bianchi/Jean-Claude Ogier crash made me despondent (but proud of Paddy's sportsmanship)there followed a celebration for those who made it through to Warwick Farm unscathed.

Edited by 275 GTB-4, 13 June 2015 - 00:42.


#25 098765

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Posted 13 June 2015 - 01:24

I'm afraid I can't. I was surprised to run across this thread and just thought I would add how one escaped into the retail world. The only other thing that struck me as odd, it was the plush model, GLS (?) with nice fluffy off yellow upholstery. I would have thought for a mule they would have something with a lot less weight.

 

I often wonder if it was sold on or merely scrapped.



#26 BRG

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Posted 13 June 2015 - 10:55

The only other thing that struck me as odd, it was the plush model, GLS (?) with nice fluffy off yellow upholstery. 

Maybe they wanted to be comfortable whilst waiting for the breakdown truck?



#27 Jesper O. Hansen

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Posted 14 June 2015 - 15:26

Sorry for doing an OT! But since special homologations seem to be the theme, I have a question about the validiation of a 2-litre Chrysler Avenger FIA group 1 car!

 

No such car on any FIA homologation list, but it could be an extention to the original 1500-model? I know of the Spanish Chrysler Euro-cars which look a lot like the Avenger and sporting both 1.6, 1.8 and 2.0 engines, but it's not that car. There's a Brazilian 1.8 Dodge from about the same period, but still no 2-litre!

 

John Nielsen, the "plumber from Assens", was the alleged driver of this 2-litre Chrysler Avenger for the 1979 Danish saloon car championship, having won the '78 title under 1600 ccm with the same car. Information from period is sparse, and by 1980 John Nielsen raced a 1979-Broadspeed Triumph Dolomite Sprint and later a pair of Toyota Corollas in the ETCC.

 

Jesper



#28 rory57

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Posted 16 June 2015 - 23:03

I worked at Chrysler's Stoke engine plant for a few weeks in 1975, temping, delivering post all around the plant, including the medical centre: one day the Doctor's Avenger had the bonnet up, and I was amazed to see a BRM twin cam.

#29 GMACKIE

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Posted 16 June 2015 - 23:35

I worked at Chrysler's Stoke engine plant for a few weeks in 1975, temping, delivering post all around the plant, including the medical centre: one day the Doctor's Avenger had the bonnet up, and I was amazed to see a BRM twin cam.

Just what the Doctor ordered ?  ;)



#30 098765

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Posted 17 June 2015 - 16:50

I worked at Chrysler's Stoke engine plant for a few weeks in 1975, temping, delivering post all around the plant, including the medical centre: one day the Doctor's Avenger had the bonnet up, and I was amazed to see a BRM twin cam.



#31 098765

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Posted 17 June 2015 - 16:52

The Doctors Avenger wouldn't happen to have been a green one would it?

#32 rory57

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Posted 17 June 2015 - 17:12

The Doctors Avenger wouldn't happen to have been a green one would it?

I think it was a dark green but it was nearly forty years ago! Certainly not orange like the cooking Avenger estate that was used for my post round.



#33 098765

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Posted 17 June 2015 - 23:20

And delving through the depths of time I seem to remember it was a Doctor something that eventually called me.
I wonder if it was the only one ever completed and by pure accident we ended up with it.

#34 arttidesco

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Posted 24 February 2016 - 10:55

03_IMG_1056sc.jpg

 

Saw this Hillman Avenger 1500 GLS Luxe crewed by Barry Jordan and James Gratton-Smith on the Cambrian Rally a couple of weeks ago it's got BRM stickers but does anyone know if it has a BRM twin cam head ?


Edited by arttidesco, 24 February 2016 - 10:56.


#35 Odseybod

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Posted 24 February 2016 - 11:23

Don't know if it helps but DVLA has it first registered on 13 May 1971, whereas I believe the Avenger-BRM was produced 1974-77. HPI suggests it's a 1500 G Luxe, and both agree it should be blue.

 

Not to say it couldn't have gained a BRM unit if someone found one sitting in the back of the garage, of course.



#36 Tim Murray

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Posted 25 February 2016 - 03:10

According to the link below Barry Jordan has two BRM engines, a 2-litre producing (a claimed) 240 bhp and a 1.6-litre which was the one fitted to the car in Arttidesco's photo.

http://autoaddicts.c...cambrian-rally/

#37 Vitesse2

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Posted 26 February 2016 - 17:25

O/T posts removed. Please stay on topic.



#38 Nick Wa

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Posted 26 February 2016 - 17:39

Back to topic...........I was lent a "curtsey" car by somebody at Broadspeed in '73? a Hillman Hunter! First time I was driven home, quite a spirited drive. It was mentioned BRM had done a bit of work on it. Next time I was given the use of it (don't go over 6000) but being  nervous with other peoples cars I    never really pushed it however it seemed to be quite lively. Now I got Jim Bate to return it and collect the Escort, now I did not tell Jim anything about the car and had not looked myself to see what it was.

Sometime later Jim tells me he's just got a new Hunter which he's a bit disapointed with as it's nothing like the one he took back to Leamington. So I wonder was that Hunter a twin cam 



#39 arttidesco

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Posted 26 February 2016 - 19:23

Thanks Tim :wave:



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#40 BRG

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Posted 26 February 2016 - 19:29

Surely the Hunter used the older 1725cc engine developed from the old Minx range.  The Avenger used a different new engine, so is it likely that BRM did a twin cam on the Hunter engine as well?  More likely it was the twin Weber Holbay version used in the Rapier H120 and Hunter GLS, maybe tweaked a bit further?



#41 Dipster

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Posted 26 February 2016 - 21:49

Just a thought. The Avenger was sold in the US as the Plymouth Cricket. Did they have a tweaked version at all?



#42 AAGR

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Posted 26 February 2016 - 23:00

No, as an employee at the time, I can promise you that BRM only worked on the Avenger engine, and never on the old-type 1,725cc engine. Oh' and the engine fitted to Plymouth Crickets (i.e., US market Hillman Avengers ....) was indeed 'tweaked' from the Home Market variety - but tweaked in the wrong direction, so that it could pass the power-sapping exhaust emission tests..