Dynoed my 97 Z28 today. Mostly Stock, here is how she ran. All SAE Corrected.

264.9 RWHP 296.6 RWTQ

with SLP 20TL, Cut Out, ASP pulley and TB bypass.

266.6 RWHP 310.9 RWTQ

after adding a Moroso CAI and Tbyrne Maf Ends.

This is an M6 with 27k miles

Best 1/8 so far without CAI and MAF ends

9.011 @ 79

 

looks about right

 

Only 2 rwhp from the CAI??

 

2hp and 14ft lbs

 

those are some good torque #'s for bolt ons.

 

yeah i was rather suprised about the HP as well. I guess theres not much HP to gain from CAI, but the torque is obvious as well as the throttle response.

 

I'd run it at the track with and without the MAF ends. Those aren't necessarily a good thing on every car. I suspect that your MAF ends may have cancelled out some of the gain of the CAI. FWIW, I installed my billet MAF ends on the dyno and immediately lost 8 rwhp. With additional tuning I got it back and 3 rwhp more, but it doesn't sound like you were doing tuning on the dyno. Do the track test and see if those MAF ends are really helping.

 

Actually i had it autotapped before and was running rich, the ends leaned it out a bit. It still could have hurt the HP, but the autotap looks a lot better. I will test it for sure. Thanks
-Scoobs

 

I am just curious why you did not get a/f ratio at the dyno. I would go by that before I would Autotap.