Gordon0652

iTrader: (4)

I was always wondering how Nascar engines are capable of being 358cu, and have 750hp also reving sometimes to 9,000 RPM? How is this possible, and they will hold 8,000 RPM on a lap, that had to be hell on your engine. So how do they do it, i have heard about the Cam they have, but there must be more, i have searched, and i come up with some parts but i am looking for speficis.
Is it possible to build a 346cu LS1 to do this?
(if there has already been a thread thats similar.. please excuse me, and link it)
Thank you!

JD_AMG

I dont see how its so unbelievable, its a race engine using racing gas.
http://auto.howstuffworks.com/question588.htm

ICEMAN 31

I love that website, very good read

staringback05

iTrader: (8)

considering those cars weigh nothing and their aerodynamics is beyond acceptable....it wouldnt be hard to see a 346 doing those speeds

WS6 Rampage

iTrader: (3)

+1......

staringback05

iTrader: (8)

also the internals to those motors are night and day compared to your regular factory gm 350....for example the piston has really no skirt to it....

its not the motor itself that makes all the power...youve got to look at the intake and exhaust...

Gordon0652

iTrader: (4)

i read that site that JD_AMG sent, and it sounds like the valveterrain needs to be like Ti. Is there any info that i can find out about the internals of the engine, or just the whole motor its self?
Thanks.

98RedBird

iTrader: (77)

Actually those cars are approximately 3,400lbs. Pretty equivalent to our cars that we drive. However, you are correct, they are quite aerodynamic.

Sunset'01Z

iTrader: (10)

so are fbodys if they are lowered.

Ntimid8r7

iTrader: (9)

Here is a piston from a DEI engine......

Ntimid8r7

iTrader: (9)

Heres a couple of top and sides. You can see in the pics above where alot of shaving was done around the pin holes. Alot of work goes into this crap!

300bhp/ton

Well last years Formula 1 engines where only 3.0 litre V10's revved to 19,500rpm and made 900bhp.

It's a race engine and little or nothing in common with what you buy from dealer/showroom.

No not really but then again yes if you have the money.

First start with your engine and throw the whole lot in the bin. That would be theonly way to start.

GT race engines (C5R and C6R) use very highly tuned/built Lsx motors making a genuine 650bhp+ from 7.0 litres. These things are built to be used in 24 hour enduro racing but seriously would not last on the street nor be very drivable.

Everything from the block to the internals is different from a stock Ls1.

If you want a fast n/a street car then bolt on's and a good heads and cam setup with tune will see 450rwhp+ depending on setup with 500rwhp being the upper limit for a street used 346ci although at this level the figures are often circumspect.

If you want an engine for racing then you'll need to see what limitations there are on components and design.

Rob98LS1

iTrader: (5)

I imagine the $ spent on research and devolopment of those engine parts are out the door.

300bhp/ton

I think an exhaust for a F1 car costs in the region of £20,000 (nearly $40,000) and only lasts one race.

Silver1969Camaro

Not like a NASCAR car. Not even close.

Aerodynamics is one thing, downforce is another.

dailydriver

This I believe, given that they are using precision built Inconel tubing.

In response to your "so what", F1 engine answer; I certainly hope that the "premier racing series in the world's" engines can do what they do. Given that except for displacement, they are somewhat UNLIMITED in the technology (AND expenditures) allowed (pneumatic valvetrains, beyond space age materials, balancing to within a millionth of a gram, [j/k on that one!], etc.), it's NO WONDER they can do what they do so well.

You do have to admit though that NASCAR engines, given their rules limitations, and "outdated, low tech, carbed, OHV/pushrod designs" make some decent power (as do the Trans Am race series cars with similar, albeit smaller displacement powerplants).

BTW; I heard Katech state that the C5/6Rs put out the power you've stated WITH the requisite inlet restrictors in place. Take them away and the power shoots up into the 900-950 hp range.

jrp

iTrader: (16)

https://ls1tech.com/forums/advanced-engineering-tech/598108-what-allows-engine-spin-8-000-rpms-stay-together-long-time.html

Hoss Ghoul

iTrader: (2)

Formula 1 cars lost about 200 horsepower when they switched to V8's. Cup cars are now making more power.

F1=750+ perhaps some over 800 this season.
NASCAR=800+ possibly 900.

purdueranger

iTrader: (11)

F1 car also weighs 1400 lbs less than the NASCAR. I have had the chance to play with a GEN III GM IRL motor in a couple classes. Its nice to look at them.

WS6 Rampage

iTrader: (3)

I'm sorry,..I just want that sound that a stock car makes when driving around town!! lol!