Tonite I decided to look for a 90-91 Vette bin for my new combo. Well I found it at ftp.diy-efi.org/incoming/ . It's a 90 L98 manual bin. Burned it... with only changing the injector value to #25 and turning off EGR. Proceeded to run a 13.0 flat, compared to my best of 13.5 on the g-tech. That right there with no tuning and no accell intake is a very good gain IMHO. These heads WERE worth it I cant wait to get that Accell intake and hopfully run mid to high 12s :P :P

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92 Z28 5.7
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Trick Flow 23° heads, Comp Cams XR270HR-10 cam, Accel intake base + ported TPI,
TES headers, Flowmaster catback, MSD ignition, #24 SVO injectors, 1LE aluminum driveshaft.

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Sweet, I'm glad your starting to see the gains of the head swap. Hopefully with some tuning and a higher stall converter I'll be knocking on the 12's door soon too.

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Black 88 GTA L98
261 RWHP, 345 RWTQ
13.406 @ 103.72 MPH
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back, Stock PROM
E.T.F.A Member #11

 

Nice... Gettin' fun again, ain't it???