What dyno #'s should I pull?

**98_Z28_ls1** · 05-27-2007, 02:53 PM

I have a 98 Z28 with 92,350 miles. I have bought a few small parts(SLP lid, SLP intake elbow, SLP MAF sensor, and throttlebody spacer) and im just curious what do you think it will pull when i get it tuned next week. It is an A4 with factory 3.23s with autolite (junk) spark plugs and it has never been tuned. Thank you for your estimates.

**Y2KPewterSS** · 05-27-2007, 04:07 PM

305-310 Rwhp

**98_Z28_ls1** · 05-27-2007, 04:42 PM

Would different spark plugs make any difference? cause i thought 305 is what it came with stock. Is it cause its old? Thanks

**slims00ls1z28** · 05-27-2007, 04:58 PM

305 stock was flywheel hp (underrated) hes saying 305-310 RWHP which is in the 350ish flywheel hp and autos usually go 290ish RWHP stock.

**98_Z28_ls1** · 05-27-2007, 05:05 PM

Originally Posted by slims00ls1z28

305 stock was flywheel hp (underrated) hes saying 305-310 RWHP which is in the 350ish flywheel hp and autos usually go 290ish RWHP stock.

Oh ok. Is there anything cheep I can do to the auto tranny to make more hp reach the rear wheels? Like maybe a shift kit or something? Ty

**98_Z28_ls1** · 06-03-2007, 04:07 PM

Originally Posted by 98_Z28_ls1

Oh ok. Is there anything cheep I can do to the auto tranny to make more hp reach the rear wheels? Like maybe a shift kit or something? Ty

same ?

**98_Z28_ls1** · 06-03-2007, 05:56 PM

Does anybody have any more opinions? please!

**biga0206** · 06-03-2007, 07:11 PM

My bone stock 98 M6 made 300 for 3 pulls. it has 80000 miles. I think 305-310 sounds about right since its an auto. Those mods arn't really major to make huge gains.

**Jeff D** · 06-04-2007, 08:41 AM

To be able to make more horse power that is noticeable you may want to do a little exhaust upgrade. Such as headers and maybe a set of high flow cat backs. That would probably make the biggest difference