Lookin for as much top end as possible
Lookin for as much top end as possible Hey guys this is my first post so go easy on me here. I am looking to build a weekend racer and it seems like a 2nd gen RX7 with a LS1 and T56 would be my best bet when it comes to performance/dollar ratio. I am going to be building a car that handles well, as well as goes pretty damn fast in a straight line, but I know it will be hard to get both from the same suspension setup. As I stiffen the suspension to ge better handling I will be reducing weight transfer to the back when I accelerate making it harder to get the tires to hook up. Also the largest tire I am going to be able to run is about a 315 so I am not gonna have a lot to work with. An engine such as the LS1 is going to have so much torque chances are I'm going to have real issues hooking up, especially seeing how I want to do all the boltons and some No2 later. Torque (really low in the RPM band) is really whats going to get the tires spinning when I need them to stick. So what I want to do is raise the powerband to the upper rpm regions, so that it will really help me around a track as well as help my top end which is where I want the power. I am not worried about torque or the car getting off the line, because in a 2500lb car no matter what I do to the LS1 it will always have more than ample torque to get such a light car off the line in a hurry. So what do I do to get the LS1 to scream? To really produce more HP than torque? But I dont really want to reduce the displacement of the engine by shortening the stroke, plus that would be too expensive, but I am still open to the idea if someone could make a convincing argument
Thanks
Thanks
LS1's, cammed, almost always make more horsepower than torque. My recommendation to you, if you want a top end screamer without touching stock displacement/internals, would be to get a medium to large cam (mid-230's+ duration), on a wide (115-ish) LSA. The wider the LSA, the further up the powerband. So if you got something like, say a 234/242 on a 115, it would not only take some of the edge of the idle of that cam, it would also push the power band up pretty high...I'm talking a cam that could pull until at least 7K. That's what I'd look at if I were you. Also, a good intake like the FAST LSX90 with the Nick Williams 90mm throttle body will help your top end.
I heard the LS1 ECU cant handle fuel management above 7k or 7500 rpm. So I am guessing that raising the redine to take full advantage of the cam is out of the question. Correct?
Ohh yeah and I cant use the Nitrous on road courses so I wouldent be able to compensate with it during those times.
Ohh yeah and I cant use the Nitrous on road courses so I wouldent be able to compensate with it during those times.
