Just a thought, does anyone make higher than stock compression pistons, ex. 10.5:1 or even 11:1 for the ecotec; that fit the stock bore and stroke, or would I need to change out crankshafts and connecting rods. Just curious. What else would have to be done to make a high compression N/A ecotec.
contact Karo at carcustoms.net. he can hook you up
Im a Xbox 360 fanboy...and damn proud of it!!
Read ALOT more before even thinking about high compression. It's not like tossing pistons in the engine and forgetting about it.
You need to think about cam overlap, pistons, rods, combustion chamber, fuel octane, spark plugs, cam timming, spark timming, fuel management, knock, and more.
Since you don't even know what to change for high compression, just stop there and read on it. Otherwise you'll be spending your life trying to figure out problems if the engine lives.
First thing to consider would be fuel. Are you ready to ALWAYS use 91+ octane fuel? If not, forget the idea right there. FYI, I gotta run 94 octane AND timming retard for 12:1 in my W41 with some good overlap on the cams (meaning some compression leak before TDC)
Another thing, if you get in the N/A build thinking you'll be coming out with 300hp, you are only dreaming. You need ALOT of knowledge to get the most out of an N/A build. Only person on this site I've seen with enough knowledge to build excellent N/A engines is Todd (protomec). Otherwise most engines are not at there 100% ( IE mine).
So search the web, learn how an engine and combustion work (even if it's a boosted engine, the physic is close). Then once you understand high compression, you can see if you really want to get into it.
Gilles
2.3 Ho
David Arestie wrote:Just a thought, does anyone make higher than stock compression pistons, ex. 10.5:1 or even 11:1 for the ecotec; that fit the stock bore and stroke, or would I need to change out crankshafts and connecting rods. Just curious. What else would have to be done to make a high compression N/A ecotec.
(other than GM racing) nobody's done higher than 11.5:1 compression before on an ecotec, so nobody really knows
cams would have to be custom made for a much higher redline. forged pistons, forged rods at the least.
nobody knows how good the stock crank is at high rpm ie. approaching 10,000rpm which is important, since revs are your friend when you're trying to make lots of power all motor with a 4 banger
maybe one day we'll find out.
Yeah, I figured it would be hard and expensive. I've always been fascinsted with sportbikes. The whole purpose of this was the understanding that a hayabusa pumps out more horsepower then we do stock, yet a busa engine is half the displacement. It's just a dream though, maybe oneday I will have enough resourses to build a high compression, high reving N/A engine. Sure sticking a on turbo kit compensates for displacement, but a 300hp N/a beast would be awesome.
Mfk-223 wrote:Read ALOT more before even thinking about high compression. It's not like tossing pistons in the engine and forgetting about it.
You need to think about cam overlap, pistons, rods, combustion chamber, fuel octane, spark plugs, cam timming, spark timming, fuel management, knock, and more.
Since you don't even know what to change for high compression, just stop there and read on it. Otherwise you'll be spending your life trying to figure out problems if the engine lives.
First thing to consider would be fuel. Are you ready to ALWAYS use 91+ octane fuel? If not, forget the idea right there. FYI, I gotta run 94 octane AND timming retard for 12:1 in my W41 with some good overlap on the cams (meaning some compression leak before TDC)
Another thing, if you get in the N/A build thinking you'll be coming out with 300hp, you are only dreaming. You need ALOT of knowledge to get the most out of an N/A build. Only person on this site I've seen with enough knowledge to build excellent N/A engines is Todd (protomec). Otherwise most engines are not at there 100% ( IE mine).
So search the web, learn how an engine and combustion work (even if it's a boosted engine, the physic is close). Then once you understand high compression, you can see if you really want to get into it.
Holy sh*t Gilles. Are you drunk or something? That was an unneccessary rant. He wants to raise compression by a half to a full point and he knows he needs pistons to do so. I assume he also asked about changing the crankshaft and rods to get an idea of how strong the Ecotec bottom end is. We know that the J-body cranks take one hell of a beating and the rods are pretty weak. This isn't common knowledge to EVERYONE though. I don't think that warrants an ass reaming.
David Arestie wrote:Yeah, I figured it would be hard and expensive. I've always been fascinsted with sportbikes. The whole purpose of this was the understanding that a hayabusa pumps out more horsepower then we do stock, yet a busa engine is half the displacement. It's just a dream though, maybe oneday I will have enough resourses to build a high compression, high reving N/A engine. Sure sticking a on turbo kit compensates for displacement, but a 300hp N/a beast would be awesome.
There is less power loss through drivetrain in sport bikes, and it would take 5 hours to even get your cavalier moving with a Hayabusa motor (given that you don't shatter the gears in the trans first).
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"Youth in Asia"...I don't see anything wrong with that.
hehe, sorry but this reminds me of a vid i saw on youtube. someone put a hayabusa motor in a smart car. one of the most amazing things to watch.sure gave that little @!#$ some balls though. search it up.
It wasn't a rant.
Just trying to give him some help. For some reason I didn't see 10.5:1 and 11:1. My bad on that one.
Gilles
2.3 Ho
