Was in discussion today with a few guys about the V8 engine the super cars use, some say its a revised 5L but i also heard its a 6L any one know?
IF YOU BUILD IT THEY WILL COME.... STILL WAITING LOL
they all 5L. "holdens" in V8 supercars run chev motors, have done for ages. larry perkins was the last guy to persist with the 304 holden motor, dunno when he switched to chev but im pretty sure when him and rusty ingall won bathurst in 97 in the castrol vs it still had a holden motor
this is pretty damn interesting to read, i always thought they where running a 6 litre ? there you go ay
Its a 5 ltr fuel injected V8,but the teams get to put in their own produced parts,jonnoo is 100% correct
i did some quick research on this "holden motorsport " motor and found nothing conclusive. is the block and heads made here in oz or made in america?
one guy reckons they're made here, another reckons they're made in america by gm motorsport.. dunno who to believe, if either of them.
They are a Holden motorsport 5 litre as Reaper said, but the block is still loosely based on a Small Block Chev as far as i know. The heads are a specific head for a V8 supercar engine.
iirc the holden engines are a gm aurora block, the same as they use to run in the pro stock truck class in the nhra with a sb2 design cylinder head similar to the yates style head that the fords use. not much holden motorsport about them apart from i think the teams have to buy them from holden motorsport.
The rest of the engine was built to HMS specifications, including the fitment of symmetrical cylinder heads, injection system etc.
So yeah in a nutshell, Holden didn't manufacture the engine. They simply chose the bits and built it to their own specifications that CAMS approved.
HMS engine was chosen for it closeness in design and spec to the ford 5L (bore, stroke and degree of V), this happened with "project blueprint" (project ford needs to win because the holdens are too fast) in either '03 or '04 memory fails atm lol, also switched front ends from Mcpherson strut to double wishbone like the fords. All the cars are essentially the same now apart from looks.
5l block bored, decked flat
355 stroker kit lightened crankshaft forgie pistons
keeping the heads couse they are cast iron but got them ported to the max larger valve stronger spring
going custom grind cam solid lifters couse u can get an extra 50 or so horsepower from it adjustable roller rockers
msd ignition system
and a come racing manifold and still only looking at the 500 horsepower mark at the wheels
LOL, the Holden cars run a V8 that has exactly nothing in common with the factory Holden V8 engine. fairly sure the blocks are chev and fairly much everything else is custom made. There was a very good write up in street machine some time ago on the Vodafone 888 engine
to quote the article in Street Machine Commodores issue 36
"The Homologated Aurora block was developed for Oldsmobile's Indy Car program. It's basically a short-deck (8.25" Vs 9.025"), small block chev with a raised (.040") camshaft bore."
fairly much every part in the engine is either a control part or off the shelf item. not many secrets inside one of these engines any more because of operation blue print. Interestingly it mentions that 888 had to use a existing cam shaft when developing the engine, they choose a Walkinshaw grind running in 55mm roller bearings, however after the first 4 rounds V8supercars introduced a control item with less lift (.700" instead of .800"+they had with the old cam) which meant that 888 had to revise the Piston dome. If i remember correctly, 888 were rockets in the first few races when they switched to Holden but then the rest of the pack caught up some, now we know why
The only thing not really shown in the article are the intake ports and combustion chambers on the heads. From what can be seen though on other pictures is that they run a wedge design head with some big mother valves in em
Last edited by immortality; 11-05-2011 at 07:40 AM. Reason: add
Body by Holden, Soul by Brockthe Legend will live forever
VN exec T5: 15.1sec @92.2mph 1/4 mile, 9.7sec @ 74.6mph 1/8mile, 2.3sec 60ft, 0-60mph 6.827sec 22/11/07 Gtech competition