359 replies to this topic

[PeterElleray]

Agreed, overall width if their was one would cause a problem, track should not presuming baggier tyres on the same rims.

Though most regulations stipulate track width. Or tyre width with bag width. More air can sometimes overcome that,, been there done that.

The whole point here is that there WAS an overall width limit introduced at the race in question:  215cm for those interested. The McLaren was allegedly 216.5cm wide as measured in the scrutineering bay that day

 

When that is the case - and Europe it is almost universally the case  - you simply cannot claim that your track is ok but your car is too wide because the tyres have changed width. If playing tricks with the tyres  won't help you (and i take your point that pumping them up is one possible get out of jail card for that) then you need to find a way of reducing the track width. In May 1976 McLaren achieved that by a combination of adjustments and some machining of the wheel hubs (thats what i have been told).

 

Don't take this personally Lee but I think it's my turn to give up because i simply cannot understand which bit of that other members find  so difficult to understand.

Edited by PeterElleray, 29 April 2017 - 21:00.

[Catalina Park]

From what I understood the maximum width that was introduced in Spain in 1976 was based on the width of the widest car and they supposedly measured all the cars at some point before writing the rule.
They just didn't want anyone going wider than what was already racing.
So in theory you could just turn up with your existing car and not give it a second thought which is exactly what Mclaren did.
They didn't take into account the variable width of the tyres.

[Cirrus]

Sorry - regarding the track/overall width thing. If a maximum overall width is specified and (with the tyres you're running, at the pressure you're running them at, the camber, ride height etc, etc) your car is too wide, then your track is too wide. If your car is 15mm too wide overall, then reducing the track by 16mm will make you legal. Overall width and track are different measurements but they're inextricably linked.

Edited by Cirrus, 01 May 2017 - 17:37.

[Charlieman]

Has anyone kept a record of Ferrari 312PB airboxes? I know that the idea is weird, but there were so many variations.

 

I'm fascinated by the twin yellow snorkel cars.

[Duc-Man]

I know we discussed this before...

Weren't airboxes supposed to do some 'ram air charging' to the engine. So any other opening would ruin that effect, right?

Now I'm a bit confused...

 

 

Okay, I dont know if this piece is original.

Edited by Duc-Man, 07 July 2018 - 08:22.

[Graham Clayton]

Ken Hamlton's radical rear-engined supermodified with a rather large airbox:

[Lee Nicolle]

Ken Hamlton's radical rear-engined supermodified with a rather large airbox:

Now doesnt that look far more functional than the thong!

[Ray Bell]

So that's what a T330 could have looked like?

That would be a very advanced car for the class, wouldn't it?

The kind of car that got stuff banned if it was successful...




.

Edited by Ray Bell, 28 August 2018 - 22:47.

[Michael Ferner]

This guy raced for half a century, so if it's not too much to ask, what year is this? Looks like early eighties, are those Goodyears cross plies?

[Rob G]

This guy raced for half a century, so if it's not too much to ask, what year is this? Looks like early eighties, are those Goodyears cross plies?

 

The race cars in the background are from the mid '50s and early '60s, and at least several of the pickup trucks are from the '60s, so I'd suggest the photo was more likely taken in the mid to late '70s.