2 ohc (overhead cam)!!!!!
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
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
I wondered what has happened to the CRYPT KEEPER from the 80s tv show TALES FROM THE CRYPT today I found out he had a sex change became nancy pelosi.
Last edited by Little Mouse; Sep 22, 2009 at 04:58 AM.
Burning Brakes
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
Here in Oz, the land downunder, our two main local car manufacturers are Ford (Australia) and General Motors Holden.
Both companies have a performance arm:
Ford has its FPV line, and GMH has the HSV line of performance cars.
HSV (Holden Special Vehicles) uses CHEV V8's imported straight from the USA (LS2, LS3 and a small batch of LS7's used also)
FPV (Ford Performance Vehicles) use the 5.4litre modular V8 fitted with DOHC heads and variable valve timing and all sorts of other hi-tech gizmos.
Bottom line.... for all its gadgetry and whizbang wow factor, the Ford BOSS 5.4l DOHC V8 in Oz lacks bottom end grunt (not enough torque) and is significantly top heavy, causing substantial issues with handling.
In fact, many performance Ford fans opt for the lighter 4 litre 24 valve DOHC turbocharged straight 6 cylinder which produces a hell of a lot more torque, is significantly quicker, and handles better than the DOHC V8!
There is nothing wrong with the simplicity of the venerable conventional overhead 2 valve per cylinder design used in the Chev V8's.... They work very very well.
If a Chev DOHC V8 is absolutely desired, then the 32 valve LT5 350 from the C4 ZR1 series (90~95) is the way to go.... if you can find one.
Both companies have a performance arm:
Ford has its FPV line, and GMH has the HSV line of performance cars.
HSV (Holden Special Vehicles) uses CHEV V8's imported straight from the USA (LS2, LS3 and a small batch of LS7's used also)
FPV (Ford Performance Vehicles) use the 5.4litre modular V8 fitted with DOHC heads and variable valve timing and all sorts of other hi-tech gizmos.
Bottom line.... for all its gadgetry and whizbang wow factor, the Ford BOSS 5.4l DOHC V8 in Oz lacks bottom end grunt (not enough torque) and is significantly top heavy, causing substantial issues with handling.
In fact, many performance Ford fans opt for the lighter 4 litre 24 valve DOHC turbocharged straight 6 cylinder which produces a hell of a lot more torque, is significantly quicker, and handles better than the DOHC V8!
There is nothing wrong with the simplicity of the venerable conventional overhead 2 valve per cylinder design used in the Chev V8's.... They work very very well.
If a Chev DOHC V8 is absolutely desired, then the 32 valve LT5 350 from the C4 ZR1 series (90~95) is the way to go.... if you can find one.
Last edited by OzzyTom; Sep 22, 2009 at 06:47 AM.
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
The plugs on a 427 SOHC are in the top of the head, close to the intake. You probably saw a 429 Boss. It had hemi chambers and centrally located plugs.
Drifting
Joined: Aug 2004
Posts: 1,883
Likes: 124
From: Lubbock TX
A SOHC won one of the big block divisions at Drag Week this year. They still make great power but have scant support and aftermarket parts.
The timing chain on one of those is long enough to tow with! I saw a pic of a SOHC with a broken timing chain, it nearly cut the passenger side fender in two!!!
The timing chain on one of those is long enough to tow with! I saw a pic of a SOHC with a broken timing chain, it nearly cut the passenger side fender in two!!!
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
The cammer timing chain is the stuff of fables, mostly. It's six feet long...which is long but not all that long.
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
