Info on the GM V8 used in V8 Supercars?

[pah]

Hi all,

I know that the V8 used in Holdens in the V8 Supercar series is not an engine that we have seen in production Commodores.

I am interested to know its background. What is the engine known as? Is it similar to the old 307 that we used to see in HK's and HT's around the 1970 era?

Is the engine still in use in production cars? If so, what cars is it used in?

Any other info on the engine?

Also, I assume that the Ford V8 used in racing is the Windsor. Is this correct?


PAH

[Azza]

The V8 Supercar category rules state that a "5 litre, cast iron engine must be used." The engines in the race cars are a specifically designed racing engine, sourced from Nascar in the United States (as is the Falcon's racing V8). The 5.7 litre LS1 engine is - apart from being of larger capacity - an all alloy engine and therefore cannot be used for racing in this category in Australia.

Copied from HRT web page.
Hope this helps a little.
Azza.

[BlownVR]

Like Azza said they are a race version of the cast iron small block Chev. If I remember correctly they use approx 4.00" bore and 3.00"stroke. The latest version has short deck height to match the ford SVO block, so that there is no advantage to be had from using longer rods or whatever. They use alloy SB2 heads with equal port spacing, can't remember the valve angle.
The old 307 had a smaller bore / longer stroke than these engines.

[Azza]

Using a cast iron block and alloy heads how do they get around the heat expanstion issues using two different metals which heat up and expand at different rates?
Not a smart-arse line, I want to know the physic's of it if anyone can answer this question and how the engineers have got around it? :confused:

[mmciau]

The use of the two metals doesn't really cause any problems at the temperature and pressurres they run at under race conditions.

They are chasing thermal efficiency together with weight paring.

Mike

[FPV GTHO]

i always thought, at least for the old chev engines used, they were a variant of the old 305

[BlownVR]

The 305 was apparently a dog due to it's small bore. The 302 Chev would be the one in terms of bore and stroke.

http://www.aces.edu/~gparmer/sbc.html

[turbo king]

The 305 was apparently a dog due to it's small bore. The 302 Chev would be the one in terms of bore and stroke.

http://www.aces.edu/~gparmer/sbc.html

Correct 302 is basically a 327 with a 283 crankshaft.The aurora update uses a copy of Fords ''Boss 302" head to supposedly improve parity.Not many Holdens using the aurora though.

[HOWQUICK]

Correct 302 is basically a 327 with a 283 crankshaft.The aurora update uses a copy of Fords ''Boss 302" head to supposedly improve parity.Not many Holdens using the aurora though.

you would love to think that they copied the Ford head but alas no. The head is a splayed valve head derivitive as used in drag racing all over the world....specially made by GM for the 5l rules.

Ford uses a Clevo style splayed valve Yates head.....

The stroke at 3" is the same as 283. But cam be used on any of the 4" bore blocks. The combo you make reference to was a common old day thing when the small journal 327 blocks were around as the 283 was small journal too. The modern combos are far removed from that architecture.

[turbo king]

you would love to think that they copied the Ford head but alas no. The head is a splayed valve head derivitive as used in drag racing all over the world....specially made by GM for the 5l rules.

Ford uses a Clevo style splayed valve Yates head.....

The stroke at 3" is the same as 283. But cam be used on any of the 4" bore blocks. The combo you make reference to was a common old day thing when the small journal 327 blocks were around as the 283 was small journal too. The modern combos are far removed from that architecture.

I stand corrected,thanks for the info.