MustangWorks.com : Ford Forums - View Single Post - E-303 Cam.. New install on stock motor. Do they really Idle bad??

gtsr515 · 01-09-2002, 11:18 PM

Hello, years ago a well respected tuner (still in business today!), did a test on a stock 5.0, swapping a stock intake for a GT-40 and dyno'd the difference, here's the results.

Stock Intake v.s GT-40 was a 12 horse increase
Stock cam for an E-303 was a 7 horse increase
Stock heads for GT-40's was 17 horse increase

now, these were done independant of each other, not combined.

but no matter which one you do, without at least 3.73 gears, you may even slow down with the 3.08's.

Good luck!

01-09-2002, 11:18 PM	#12
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	Hello, years ago a well respected tuner (still in business today!), did a test on a stock 5.0, swapping a stock intake for a GT-40 and dyno'd the difference, here's the results. Stock Intake v.s GT-40 was a 12 horse increase Stock cam for an E-303 was a 7 horse increase Stock heads for GT-40's was 17 horse increase now, these were done independant of each other, not combined. but no matter which one you do, without at least 3.73 gears, you may even slow down with the 3.08's. Good luck! __________________ Remember...2nd place is 1st place for losers!