Nascar LS1?
#1
Nascar LS1?
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!
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!
#2
TECH Senior Member
I dont see how its so unbelievable, its a race engine using racing gas.
http://auto.howstuffworks.com/question588.htm
http://auto.howstuffworks.com/question588.htm
#3
TECH Fanatic
Originally Posted by JD_AMG
I dont see how its so unbelievable, its a race engine using racing gas.
http://auto.howstuffworks.com/question588.htm
http://auto.howstuffworks.com/question588.htm
I love that website, very good read
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Originally Posted by staringback05
considering those cars weigh nothing and their aerodynamics is beyond acceptable....it wouldnt be hard to see a 346 doing those speeds
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#8
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Originally Posted by staringback05
considering those cars weigh nothing and their aerodynamics is beyond acceptable....it wouldnt be hard to see a 346 doing those speeds
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Originally Posted by 98RedBird
Actually those cars are approximately 3,400lbs. Pretty equivalent to our cars that we drive. However, you are correct, they are quite aerodynamic.
#12
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Originally Posted by Gordon0652
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.
Originally Posted by Gordon0652
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.
Originally Posted by Gordon0652
Is it possible to build a 346cu LS1 to do this?
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.
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Originally Posted by 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.
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.