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[markrnorton]

car target weight is 650kgs and rear diff is 4.33. so torque not top of the agenda, but is always nice to have.

Is the 3.0 stronger than the 3.2 then, or are they much the same ?

Main issue with supercharging is temps, piston crown, the rod and crank strength. however as supercharging power is more linear than turbo, it is a bit kinder (sometimes)

[TheBoy]

Is the 3.0 stronger than the 3.2 then, or are they much the same ?

I thought the 3.2 was supposed to be stronger, AFAIK, steel crank.

[Kevin Wood]

car target weight is 650kgs and rear diff is 4.33. so torque not top of the agenda, but is always nice to have.

It's going to need seriously sticky tyres, then, or it'll be traction-limited until half way through 3rd gear.

The G33 is a lovely car, though. Looked very closely at them but built a Westfield in the end.

That has a 200BHP 2L lump in it, incidentally (Ford Zetec), rev limit set at 7400, also about 650Kg, and I changed to a 3.64 LSD because it was a joke with the 3.92 open diff I used initially.

Is the 3.0 stronger than the 3.2 then, or are they much the same ?

Not a lot of difference although the 3.2 does apparently have a forged crank, so possibly worth going with it for that reason alone. On the other hand, think it has an odd bore size, though. 3.0 does share piston dimensions with some other engines. C20XE being one that rings a bell (please check before spending money though!), so maybe more support for tuning it?

Main issue with supercharging is temps, piston crown, the rod and crank strength. however as supercharging power is more linear than turbo, it is a bit kinder (sometimes)

A few people have said that the bottom end is the Achilles' heel of this engine, so a big increase in torque might be a bad idea. So might a big increase in revs, of course. For a little car like a Ginetta I would go the NA route, though. I think it'll be a lot more fun.

[markrnorton]

traction may be an issue, but we'll have to see how bad it is. sticky tyres are a must.
Diff will be a LSD, so it should help somewhat. the 2.5 will go in for now, and the bigger engine will follow after IVA and a good shakedown

[markrnorton]

As a footnote, i have already graphted the front hubs from the omega onto the car. and will continue to use parts from the donor as i go. 4 opt caliper conversion will follow soon

[tunnie]

Why not use a 2.8 V6 Turbo?

[Kevin Wood]

traction may be an issue, but we'll have to see how bad it is. sticky tyres are a must.
Diff will be a LSD, so it should help somewhat. the 2.5 will go in for now, and the bigger engine will follow after IVA and a good shakedown

Might be worth finding a pre-August 1995 engine if it's only going to be for IVA?

[cem_devecioglu]

those engines are not designed to race.. you need to build the v6 from scratch with forged internals and better cooling which reqiures a deep budget.. find another engine.. otherwise its waste of time and money..
 
note :c20let, GM v8 and toyota jz2 are tested and succesful on omega..

[markrnorton]

traction may be an issue, but we'll have to see how bad it is. sticky tyres are a must.
Diff will be a LSD, so it should help somewhat. the 2.5 will go in for now, and the bigger engine will follow after IVA and a good shakedown

Might be worth finding a pre-August 1995 engine if it's only going to be for IVA?

Already got a 2.5, it will be fine for IVA. Just want to build up a second engine for later.

[markrnorton]

those engines are not designed to race.. you need to build the v6 from scratch with forged internals and better cooling which reqiures a deep budget.. find another engine.. otherwise its waste of time and money..
 
note :c20let, GM v8 and toyota jz2 are tested and succesful on omega..

Who said race ?? !!

Stronger internals aren't an issue, i was just trying to find out if anybody had actually done anything or pushed an engine to breaking point.

as for the other engines, they are not as compact as the V6, i spend alot of time finding the right engine, for size and weight distribution. V8 is to big. And its not going in an Omega !! as stated in the thread, its going in a Ginetta


And defo no turbo's, has to be linear power delivery and i dont want all the pipework associated in the engine bay.

[cem_devecioglu]

those engines are not designed to race.. you need to build the v6 from scratch with forged internals and better cooling which reqiures a deep budget.. find another engine.. otherwise its waste of time and money..
 
note :c20let, GM v8 and toyota jz2 are tested and succesful on omega..

Who said race ?? !!

as for the other engines, they are not as compact as the V6, i spend alot of time finding the right engine, for size and weight distribution. V8 is to big. And its not going in an Omega !! as stated in the thread, its going in a Ginetta


And defo no turbo's, has to be linear power delivery and i dont want all the pipework associated in the engine bay.

"My final aim is circa 300hp, i just wanted to know if it could be done through N/A tuning or whether i would have to use"
 
   for what you will use 300 bhp.. for picnic ? 
 
 
"Stronger internals aren't an issue, i was just trying to find out if anybody had actually done anything or pushed an engine to breaking point"
 
ask mr Admin, he eats the standard internals before breakfast while heating up

[TheBoy]

  for what you will use 300 bhp.. for picnic ? 

You can never have enough power, Mr cem, never enough.
 

ask mr Admin, he eats the standard internals before breakfast while heating up

I always let it heat up and cool down properly. But between those times .

[markrnorton]

CEM^^^ not sure why its funny. serious question, just wanted answers from experienced engine builders. i dont think 300hp is alot either. depends what you are used to

[GastronomicKleptomaniac]

Why not use a 2.8 V6 Turbo?

Out of interest, how closely related are the later 2.8s to the Omega V6s? I know the Vectra's 3.2 was a FWD version of the Omega 3.2...

This has nothing to do with a very cheap ex-plod 2.8 Vectra that's kicking about...

[TheBoy]

Why not use a 2.8 V6 Turbo?

Out of interest, how closely related are the later 2.8s to the Omega V6s? I know the Vectra's 3.2 was a FWD version of the Omega 3.2...

This has nothing to do with a very cheap ex-plod 2.8 Vectra that's kicking about...

Not even remotely