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#1 Bob Riebe

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Posted 06 January 2016 - 21:05

These are worth a glance:

 

http://www.enginelab...-marine-engine/

 

http://www.enginelab...-for-ls-engine/

 

http://www.enginelab...roplane-racing/



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#2 Lee Nicolle

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Posted 07 January 2016 - 03:07

32 valve LS. As many on that page asked, how much HP and how much torque? 

Is the whole effort worth the expense? Will it be reliable and practical.

My thought are NO. Way too complicated. And too big. And just think of the timing chain stretch!

The Lotus head Vettes 25 years ago really were not performers. 

Though Mercury generally have a fairly good record.



#3 Canuck

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Posted 07 January 2016 - 05:11

And just think of the timing chain stretch!

I'm going to go with none.

 

“We use a separate belt drive for each set of camshafts,” explains Christiansen, noting that the crankshaft drives a gear mounted to a dummy cam located in the stock cam journals. That gear then drives each set of belts.



#4 Magoo

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Posted 10 January 2016 - 23:33

Enginelabs has some good stuff. Only occasionally is the material newsworthy from my perspective, but it's usually entertaining. 


Edited by Magoo, 10 January 2016 - 23:33.


#5 Bob Riebe

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Posted 11 January 2016 - 04:28

Enginelabs has some good stuff. Only occasionally is the material newsworthy from my perspective, but it's usually entertaining. 

I agree that some articles look too much like an info commercial to me.


Edited by Bob Riebe, 13 January 2016 - 21:29.


#6 Lee Nicolle

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Posted 11 January 2016 - 22:22

I'm going to go with none.

 

“We use a separate belt drive for each set of camshafts,” explains Christiansen, noting that the crankshaft drives a gear mounted to a dummy cam located in the stock cam journals. That gear then drives each set of belts.

The pic showed chains!

Belts still stretch but are generally a way better deal. Though replacement must happen at the proper intervals and keep the oil and stones from them.



#7 mariner

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Posted 22 January 2016 - 10:07

And an interesting peice on a V-10 GM engine from 2004.

 

http://www.enginelab...rototype-ls-v10

 

I am amazed that such stuff just gets sold off as junk



#8 gruntguru

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Posted 23 January 2016 - 03:47

 

And an interesting peice on a V-10 GM engine from 2004.

 

 

"Of course, a one-off camshaft would have been developed and used for this application as well. The cam that was pulled from this engine measures 24.875-inches in length and rides on six bearing journals. Gross lift of the camshaft has been measured at .478-inch, however duration is unknown. The camshaft also utilizes GM’s single bolt variable valve timing actuator. Currently the firing order is unknown, the KC Maxx team hopes to have that sorted prior to installing an electronic control system once the engine is reassembled."

 

5 minutes looking at the camshaft will allow you to work out the firing order.



#9 Kelpiecross

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Posted 30 January 2016 - 12:00

It would probably take me more than 5 mins - and I have done (or attempted to do) this sort of thing many times.   On a single overhead cam inline engine it is fairly simple - but on a Chev V-8 cam the lobes are very closely spaced and the lobes are mixed up with both cylinder banks and also with the neighbouring cylinders.  But - agreed - it shouldn't take all that long especially if you are an "expert".      



#10 Greg Locock

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Posted 30 January 2016 - 12:28

Pull the plugs and rocker covers,turn the engine over slowly,observe what order the valves move.

#11 Kelpiecross

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Posted 31 January 2016 - 03:02

Yes - probably a better method than looking at the cam itself.