2 ohc (overhead cam)!!!!!
Thread Starter
Instructor
Joined: Aug 2009
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From: marcinelle hainaut
2 ohc (overhead cam)!!!!!
hello,
I would wish to find an engine with 2 OHC (overhead cam)!!!!!!!!
I know that mustang produced some!!!!
is it possible to find some and at which??
I would wish to find an engine with 2 OHC (overhead cam)!!!!!!!!
I know that mustang produced some!!!!
is it possible to find some and at which??
Race Director
Joined: Jun 2000
Posts: 10,036
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From: FL
The only OHC V-8's that GM produced where the LT-5 and Northstar. The LT-5 is very expensive, long out of production and hard to find parts. The Northstar is newer but is a much smaller engine (I want to say 4.6 liters). It also designed for a FWD application so there are other issues as well.
The proven pushrod OHV design works. OHC is good for bragging rights but not much else.
The proven pushrod OHV design works. OHC is good for bragging rights but not much else.
Last edited by SteveG75; Sep 21, 2009 at 12:00 PM.
Safety Car
Joined: Oct 1999
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From: NorCal
In your part of the world (Belgium), your best bet would be an Audi, Mercedes or BMW V-8 if you have your heart set on a DOHC setup. Heck, if money's no object, get a Ford 427 DOHC motor! Those babies made some power.
Hans
Hans
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From: Dayton, Ohio
Safety Car
Joined: Oct 1999
Posts: 4,101
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From: NorCal
Yep, they were designed for NASCAR, outlawed, then used for drag racing extensively in the '60's. Awsome engines, there is a guy out here (Wayne Torkelson) that ran a '57 T-bird with one in it. I haven't seen it in a while, but it was bad **s to watch! latest times were in the 6.599 range!
http://www.firebirdonline.com/blast_.../bftp_4_16.htm
http://www.firebirdonline.com/blast_.../bftp_4_16.htm
Last edited by Wrencher; Sep 21, 2009 at 02:56 PM.
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From: San Antonio TX
Le Mans Master
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From: Santa Ana CA
Forget the DOHC and go with a 32-valve small block Chevy. These heads are plenty exotic and will get you where you want to be. 
http://www.araoengineering.com/Chevy/chevysmb.htm
http://www.araoengineering.com/Chevy/chevysmb.htm
Le Mans Master
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Rarely mentioned the SOHC 427 had hemi chambers.
overhead cam 3 and 4 vale engines are far superior to two valve push rod engines its a real shame no one has built a large cube version,
the down side has always been the extra cost and size of the overall package.
overhead cam 3 and 4 vale engines are far superior to two valve push rod engines its a real shame no one has built a large cube version,
the down side has always been the extra cost and size of the overall package.
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
My shop has a bunch of different types of DOHC America v-8 and V12's 4 valve per cylinder.
Ford Cosworths, buicks, Westlakes, The Gurney Westlake eagle F1 car. Anywhere from 3000 cc to the big 7.4 liter. The only problem is they cost $70,000 to rebuild these exotic motors
Ford Cosworths, buicks, Westlakes, The Gurney Westlake eagle F1 car. Anywhere from 3000 cc to the big 7.4 liter. The only problem is they cost $70,000 to rebuild these exotic motors
Le Mans Master
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Interesting which one is 7.4 liters or V12s ?
Race Director
Joined: Jun 2000
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From: FL
Here are the new AFR 195 Eliminator with Competion porting option.
Here are the AFR 227 Eliminator with Competion porting option.
The Arao may flow better than stock but the new generation of 23 degree heads have passed them by.
Safety Car
Joined: Aug 2001
Posts: 4,883
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From: North Easton Mass
Hey Delgal,
Do you actually have a project going on? You have started a number of threads in the last week or so on different engines but you don't seem to get involved in the threads.
Rick B.
Do you actually have a project going on? You have started a number of threads in the last week or so on different engines but you don't seem to get involved in the threads.
Rick B.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
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Overhead cams become an advantage in a lot of ways from a durabilty
stand point you loose the lifter and pushrod, they make multiple valves
for better breathing possible, each individual valve is lighter it takes less
valve spring pressure to control the lighter small multiple valves.
Even in truck engines that turn as low 1600 rpm since the early 1990s
all have changed over to overhead cam, truck engines have had
two intake and two exhaust valves forever, starting in the nineties they got rid of the roller lifters and push rods better durabilty without them.
Its truly a shame no one has built a large cubic inch production engine
with multiple valves overhead cams.
A big block chevy of only 454 cubes and most people go bigger is way under valved even if you put a set of 2.35 sized intake valve aftermarket heads on it, the bigger the cubes get the more under valved the big block becomes.
stand point you loose the lifter and pushrod, they make multiple valves
for better breathing possible, each individual valve is lighter it takes less
valve spring pressure to control the lighter small multiple valves.
Even in truck engines that turn as low 1600 rpm since the early 1990s
all have changed over to overhead cam, truck engines have had
two intake and two exhaust valves forever, starting in the nineties they got rid of the roller lifters and push rods better durabilty without them.
Its truly a shame no one has built a large cubic inch production engine
with multiple valves overhead cams.
A big block chevy of only 454 cubes and most people go bigger is way under valved even if you put a set of 2.35 sized intake valve aftermarket heads on it, the bigger the cubes get the more under valved the big block becomes.
Last edited by Little Mouse; Sep 22, 2009 at 04:37 AM.
Team Owner
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I got to work on some of those big v-12's that came in those IMSA Jaguar silk cut and castrol GTX Those were anywhere from 7.0 to almost 8.0 liter. From the same IMSA time period I have seen 4 cam 4 valve nearly 500 ci gear driven cammed American big block Chevys
The gurney eagle is 3.0 liter v-12 4 cam 4 valve also. all of our older v-8 Indy cars were kind of stock/aluminum american blocks with 4 cams and 4 valves. We have the 1966 david fulmer indy car aluminum buick block and the exhaust exits where your normal V-8 intake is. The injection is nearly straight down. Indy cars back then were only 255ci We have one of the indy 500 car from 1976 also a V-8 4X4 which makes over 800 hp with twin turbos out of less than 200 ci
We have Ford cosworth v-8's from 3.00 liter to 5 liter
The gurney eagle is 3.0 liter v-12 4 cam 4 valve also. all of our older v-8 Indy cars were kind of stock/aluminum american blocks with 4 cams and 4 valves. We have the 1966 david fulmer indy car aluminum buick block and the exhaust exits where your normal V-8 intake is. The injection is nearly straight down. Indy cars back then were only 255ci We have one of the indy 500 car from 1976 also a V-8 4X4 which makes over 800 hp with twin turbos out of less than 200 ci
We have Ford cosworth v-8's from 3.00 liter to 5 liter