In the winter I was 313/260 SAE 4th.
My cbe
My 2.75" cai
Ported TB, upper and lower
Obx lth
18x10.5 +15 rpf1 with 285 rs3's
I sold all my ported stuff to Kasey because I couldn't find a lower for him and then I got a return and redid it all just for me. I went back for a retune 5/12 just to make sure it was safe but lost 5hp and 3tq. Now I did have 4 slight changes...
20mm rear spacer
All new ported TB, upper and lower.
Now we can chalk the loss up to weather or something but in SAE 5th I'm only doing 313/266. If I was STD like everyone else I'd be 320/273 but that's way down from Z1 cars I've seen. My parts hate me or Z1's dyno or tuners doing some kinda cool aid!
I asked about gear because you can see (red) 5th dies down but (blue) 4th is still climbing. If you were done in 5th maybe we're running out of steam. My 2.75" intake might be a little better than your 2.5" intake which is why I don't fall as much. Maybe we need some velocity stacks right out of the hood
