i thought bolt on LS1s could make 400HP, at least from the fly wheel. Am i missing other bolt ons? Or is it people adding the supposed HP from certain mods like SLP lid with Smooth bellow and K&N which claims 25hp. What is the most people have gotten? I have searched for this but it seems to be hard to find what i am looking for. I would of thought i would have a little more to do other then the exhaust on my car. THanks.

 

what is the most horsepower and Torque you can get without doing a cam? I want it to be very drivable with a lot of power. With good gas mileage. Say stroked motor, and some good heads with headers maybe a tune. Has anyone ever dynoed this? Can you use the stock LS1 block and bore it and stroke to 427 like the Z06? i dont no alot about this stuff so i am just wondering what people have done? thanks.

 

Dude I don't intend this to be mean, but you need to find and read some books on 4 cycle engine theory. Find out how and why it does what it does. Learn some basics. Try your local library.

After you do that these questions will sound really silly to you and you'll get a good laugh.

 

Regardless if it's possible, boring and stroking an engine is A LOT more work then a cam swap...
That and theres no reason you'd up displacement, get better heads and exhaust, and not change from a stock camshaft.
If you're looking for "recipe's" for a certain HP just search..... you'll find what you need.

 

Agreed.

 

You can do a cam and get good gas mileage. Look at kraest's numbers, I bet his car gets better gas mileage than my stock 2005 dodge ram.I get about 15mpg on highway I bet his car gets better than that.

 

15 city 27 highway to be exact

 

You cannot get any more than 383 out of the stock LS1 block, I think.. THe LS2 block can be sent to MTI for a re-sleeving to make it a 427.

Also, My buddy gas a 2002 SS w/ the MS4 cam (HUGE CAM!!!) and heads, electric water pump, under drive pulleys, LT's Off road Y and hooker cat back, and he gets better mileage than I do! And he finally got a decent tune! I, on the other hand, desperately NEED a tune. I was going to wait for the h/c on mine before I did it, so I don't have to RE do it..

You can do a 228/228 .588 .588 114 or 112 cam, have it tuned and get good mileage . That's a mild cam.

Please, invest in a tune.. If you get a set of headers and a good cat back, and a lid, GET IT TUNED! My gas mileage improved DRASTICALLY after my dyno tune! A mail order tune will do just as good, just tell them what you have done to the car.

 

the biggest a ls1/ ls6 can go is 402ci i beleve

 

The biggest the LS1/LS6 can go is around 454ci wet-sleeved and 383ci with a small bore and without sleeving; however, the 383 LS1 will be an undersquare motor at 3.9" x 4.00" stroke as opposed to the oversquare Gen I/II SBC at 4.03" x 3.75".

 

hmm. so what do people usually get with a Air lid Catback and mail order tune? Anyone dyno this? I just feel doing a cam would wear out the Valvetrain and i just want my car to be fast with good gas mileage and last! Thats why i dont want a CAM. I guess i am scared of it lol. Thanks i do no things about cars i mean i guess its a stupid question. But i was wondering because i seen Rotating assembles for like $1,000 EAGLE, in Jegs or Summit, that was awhile ago when i was thinking getting a 383 built for my cutlass. i figure they would be around the same price for LS1. Anyways so anyone with the 3 things i just listed dynoed? thanks.

 

If you're dead set on more power and better fuel economy without more displacement or a cam swap, contact AFR. During CARB testing for their cylinder heads, the head swap along with no other changes (completely stock 346, no bolt-ons) made an additional 40-50HP or so, and actually increased fuel mileage! It's an expensive way to go, but I would say that with a set of AFR heads, stock cam, and full bolt-ons 450HP at the crank is by no means unreasonable.

 

thanks for a nice quick reply. Im only 20 i am just trying to learn what people get i wont afford this stuff yet lol. I still need to go to college and i am dead scared about what to do for a living! But for now i have my car and i could afford bolt ons and mail order tune i suppose. In the future i could see other things. thanks again.

 

I just looked at the afr heads and they show the stock ls1, ls6 intake, long tube headers making 428hp. Thats a little overrated I think. So if they're dyno exagerates that, I wouldn't be suprised if they're gains are a little exagerated with the stock cam. You could go with a mild cam and still get good gas mileage. Actually the cam in the 01-02 cars was the cam out if the 6.0 liter truck motor. They put it in to get better low end torque and better mpg.

 

Maybe just a tad on the high side, but several other companies have shown similar results. GMHTP did a recent article on a PRC head, MS4 cam build and showed a stock LS1 with LS6 intake, dyno headers, and no accessories well over 400HP. Regardless of what GM states, the LS1 with the LS6 intake is a 350HP+ engine stock.