My C5Z made 610RWHP NA today...

[Darkstar]

@tjZ28

…we made a few changes to the car in prep for taking it to the strip Sunday. We only gained ~10hp at peak up to 610RWHP and just a bit of torque (up to 532 from 529RWTQ). I’m waiting to get the graphs, but my tuner said it did pick up a good bit under the curve despite the somewhat disappointing peak #s.

What we changed:- We ditched the 85mm stock C5 MAF and went Speed Density. The Haltech intake bridge I had has a 96mm opening so we just put a filter straight onto it. Keep in mind I’m running a 102mm Throttle Body and 102mm FAST “LSX-R” Intake Manifold.- Borla straight-through 3" catback replacing the stock C5 Z06 Ti exhaust. The X-pipe unfortunately still necks-down to 2.5" just before the flange for the catback. Still, compared to the small piping of the Ti (a little under 2.25" actually) and the two 180* turns that the exhaust makes in the Ti I expected a good gain here.

I’m thinking we’re really running into the limitations of the “LS-style” intake manifold, even if it is the big 'ole 102mm. I’m just not going to do a big single plane or sheet metal intake, or individual throttle bodies. After the strip this weekend we’ll probably just put the Ti back on it and be happy w/ the 600RWHP.

-TJ

I got a letter in the mail on Friday stating that my registration will be eligible to be reinstated on 6/30/10. WOOOOOOOOOO