production engines

[roninho]

Hi there,
in recent years quite some racing series have started using engines based on production engines. So modified production engines.

Now i have read that the Lamborghini GT3 engine is exactly the same as the production car engine. I have also heard that a Ferrari 458 with a production engine won the bathurst 12 hours.

Do you have more examples of engines straight from the production car that are used in racing series? So without any modifications?

[roninho]

So nobody got a clue?

[matt21]

So nobody got a clue?

Mercedes SLS GT3
Porsche GT3
Corvette GT3
Basically all GT3 are more-or-less standard equipment.
Some of them are also de-tunded due to the size of the restrictor given bei BoP.

[tuj]

I guess I'm wondering what you call a 'production' engine? Production architecture? If so, then most of the SCCA national championships have been won with highly blueprinted and optimized 'production' engines. Spec Miata is a series where generally speaking, true production engines are used, nearly as they come from the factory.

[J.A.W.]

& many racing classes specifically forbid 'production' mills, but Moto 2/WSBK are top-flite exceptions..

[roninho]

I guess I'm wondering what you call a 'production' engine? Production architecture? If so, then most of the SCCA national championships have been won with highly blueprinted and optimized 'production' engines. Spec Miata is a series where generally speaking, true production engines are used, nearly as they come from the factory.

What i mean with a production engine is the engine that is taken from a car allowed to drive on public streets and is not modified for racing (or very limited modified for racing).

So for example engines from one of these cars: http://autoweek.com/article/car-news/500-hp-club

I Always figured that the engines one can drive on the public roads are not suitable for racing, but as i said in my initial post i am now aware of at least 2 unmodified engines that have been used in racing.


I guess i'm wondering if i pick an engine from one of the cars as listed above and put it in a formula-chassis and only allow some minor modifications for reliability, would it last for 2+ hours/500 miles racing?

[roninho]

So nobody got a clue?

Mercedes SLS GT3
Porsche GT3
Corvette GT3
Basically all GT3 are more-or-less standard equipment.
Some of them are also de-tunded due to the size of the restrictor given bei BoP.

Thank you.
Question is what is ''more-or-less standard''?

[J.A.W.]

As purchased from the showroom, but raced with a track specific set-up including extra aero/ride height mods & etc..

[andylaurence]

Completely standard engine from a Ford Fiesta ST. It even uses the standard intercooler. It's de-tuned from standard and practically lasts forever.

[J.A.W.]

So A-L, which tuning parameters are derated from showroom standard - for the F-racer application?

[matt21]

So nobody got a clue?

Mercedes SLS GT3
Porsche GT3
Corvette GT3
Basically all GT3 are more-or-less standard equipment.
Some of them are also de-tunded due to the size of the restrictor given bei BoP.

Thank you.
Question is what is ''more-or-less standard''?

Adaption to air-restrictors, different catalysts, changed ECU, different intercoolers, exhaust, coolers
, dry sump etc.
The rules say:
- [Car] to be equipped with an engine used in a production car and made in a quantity of at least 300 units.

[andylaurence]

Physically, it's identical aside from the air box and exhaust. It runs a life ECU and the map on that is restricted to about 170bhp. I don't know how as that's ford IP. Presumably boost is restricted.

[J.A.W.]

Ok, thanks A-L, does it also have a ECU fixed rev-limiter?

I ask since derestricting inlet/exhaust often allows more, rather than less - boost..

[andylaurence]

It's not the rev limiter that restricts performance. It's the map. I believe it's done with reduced boost pressure as you can see the ECU trying to manage the boost pressure on each gear change.