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Home rebuilt LT1, stock bottom, CC503 with 1.6RR, ported heads done by myself, stock fuel system, Pacesetter LT headers with y-pipe and Magnaflow cats, SLP LM1, 52mm BBK TB, Accel Optispark. Put down 340 & 345 hp with old tune from PCM4Less tune.
I don't think I ever posted up what mine made last go-round. Few changes were made when redoing valve springs and brought down the CR a bit from being higher then expected before. New exhaust setup, and some cooling mods will be going on in the next few weeks.
Had my 1994 Cheyenne dynoed at 296rwhp and 328wrtq with a stock 139,000 mile long block LT1/T56.
Mods include SLP airfoil, $30 eBay air intake elbow, Hedman 1 5/8 headers, dual 3in pipes, Flowmaster merge, 4in single Flowmaster Delta 10 muffler, CSR Summit electric water pump, 1LE a/c delete pulley, EGR delete, 15 ohm spark plug wires, new Optispark, and a 93octane tune but no dyno tune just yet.
Just had mine tuned on tuesday at tpis. I have a 355 with forged pistons and h beam rods on the stock crank. LE 21* tfs heads and cam. 4000rpm stall and 4l60e. With a 9" rear end.
Car made 392 whp and was still pulling at 6700 but was having some ignition issues and had to stop. This was on a dynomite dyno.
1994 Trans Am GT, M6, 100% stock except for Moroso CAI & K&N air filter: SAE 267.7 HP @ 5100 RPM, 310.8 LB-FT @ 3200 RPM.
Since then I have installed a BBK 52cc throttle body, 1.6:1 Comp Cams roller rockers, a new optispark, and a new catalytic converter. I hope to get it dynoed this year before winter strikes.
Last edited by 94TAand 05GTO; Sep 11, 2017 at 09:21 AM.
1994 Trans Am GT, M6, 100% stock except for Moroso CAI & K&N air filter: SAE 267.7 HP @ 5100 RPM, 310.8 LB-FT @ 3200 RPM.
Since then I have installed a BBK 52cc throttle body, 1.6:1 Comp Cams roller rockers, a new optispark, and a new catalytic converter. I hope to get it dynoed this year before winter strikes.
I would wait until you can get a set of headers and a Catback, egr delete if allowed, then dynotune it!
Basic 383 Brodix -18 headed LTx with a 300 shot. it made 53x N/A through a TH400 and 9in
If we had not burned the valve it should have went just over 900Whp. I hurt it the week before on "E" and this was trying to make the west coast shootout on C23.
Not my current set up, but before i had the engine rebuilt. Stock engine with CAI(filter, straight pipe, aluminum elbow, air foil, and coolant by pass mod) Hooker Super Competition headers. Stock 2 1/4 exhaust with the exception of the mufflers replaced with tiny glass packs. It also had 4.10 gears and a tune. It made 295 hp with an exhaust leak on the drivers side header flange. Can't wait to dyno the new set up.
did you have long tube headers or stock manifolds?
With the stock numbers I posted, it was with stock manifolds. With the 380 number it was with AS7M/RK Sport mid length headers.
My best run with this set up was 11.9@112.
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1997 Camaro LT1 
