Join Date: Feb 2007
Location: Saint Augustine, FL
iTrader: 1 reviews
Dead stock PI 5-speed GTs in decent tune will turn 220 rwHP, give or take 5. I have seen a half dozen or more on the rollers, ranging from a ratty 2001 (with an "eBay" HAI) that managed to churn out just 206, to a very clean Bullitt that put down 228. Most come in so close to 220 that you could set your watch by it. On a dyno in 4th gear (3rd for an auto, with the tranny locked) auto or 5-speed makes no difference.
A good (not great, good) and "safe" tune optimised for 93 octane will bring that to 235, maybe 238, with no other mods. Individualise the AFR and timing for a particular engine--and make a video of the best run--and 244 is not a major challenge--with the stock intake.
With the mods listed in my signature and a fully tweaked tune I got 262/305 (best of 4 runs, 256 to 262)...
- 2003 GT, UPR X, 24lb/h injectors, Magnaflow, 180° stat,
PP 70mm TB & plenum, Ralco RZ_flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.
new ride - 1998 SL500, 5.0L 32V 326/347 HP/tq