A little more Horsepower

[fastd]

Slider701,

Good point; I am running 3.54 gears and I have .68 OD (Tremec TKO). In fifth gear I do feel like I lug a little everywhere but 65+ and at 70 mph I think rpms are about 2200; I ran on the track at VIR and in the straights, 5 gear really didn't really grab that much at all; went to about 115-120 mph in 4th but to take the next step in 5th seemed like too much work for the engine so waffled around between 4rth and 5th.

So if I couldn't find the top end on the track, and I am looking for a little pop on the street, seems like I could handle moving to 3.70s (or lower)?

[patrickt]

Originally Posted by fastd

So if I couldn't find the top end on the track, and I am looking for a little pop on the street, seems like I could handle moving to 3.70s (or lower)?

I have the 3.54 and the .64OD gear ont the TKO600. The 5th gear is only used for pleasant cruising, not for racing. BUT, I spec'd my engine so that the first four gears allow me to hit 140 (solid cam, so I can rev a little higher). I think what you're looking for is more torque, not having to shift quicker. Assuming your dyno-tune doesn't get you a whole lot more power, the heads and cam from one of the guys on this forum is, roughly, a grand or so. Maybe upgrade the rockers as well. It's a one day job for your mechanic to bolt the heads on and stick a cam in ASSUMING you can do that without pulling the engine. We're not talking a huge money investment here. I wouldn't mess with your rear end ratio.