NLman3

I have a 98 ss with a crane cam 208/216 530/530, ported my heads and intake slightly, hooker LT's with y pipe and no cats and gmmg cat back. The problem is my car is only doing 313 rwhp and 366 rwtq 2 days after installation. Will a dyno tune help? what kind of gains can i expect from a dyno tune? want the Hp that im missing ..lol help

swolbynos

98's dyno lower than others, but get it tuned and get 10-15 at least i would think

moyam01

Bro, You might be running dead rich with those long tubes and no tune, get it tuned and see what happens.

Hysteria

Well for one did you flow test your heads. I am sure you researched a little before you put the grinder to them, right? Another thing is the porting of the intake, very,very small gain if any. Tuning the car could gain 25 or 5 depending on the heads, good port job or a cluster job. I ported my heads but have been doing it for 10 years now and do a soso job, usually in the 27x range. So the heads may be whats holding you back or just a good tune.

CaptUSA

iTrader: (5)

Did you rig up your O2 sims right?

PREDATOR-Z

All talk is BS and speculation before a dyno tune. Once this is done, then you can finger the weak spots.
IMO a LS6 intake will give you more horses than the ported LS1 one. Also I do not see a ported TB.
So if I were you, I would get those 2 and dyno tune. You should see 350>360 horses.