Car ran lean on dyno

350HPZ

New Member
Jul 18, 2003
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I went to street stuff in addison ill. and dynoed a03 Gt 5speed with TFS intake, Ford 70mm TB ,U/Dpullies ,steeda N/A tune,Flowmaster mufflers. the car dynoed at 241hp and 282 tq.the a/f is 15.9 at 3200,and stays at 15.5 till4300 rpm . At 5100rpm its at13.7.the second run is the same. My question is anybody have anything like this happen.
 
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350HPZ said:
I went to street stuff in addison ill. and dynoed a03 Gt 5speed with TFS intake, Ford 70mm TB ,U/Dpullies ,steeda N/A tune,Flowmaster mufflers. the car dynoed at 241hp and 282 tq.the a/f is 15.9 at 3200,and stays at 15.5 till4300 rpm . At 5100rpm its at13.7.the second run is the same. My question is anybody have anything like this happen.
I'd call up steeda.. Their tune should have adapted for those simple mods. They will probably help you out or have you send their tune back.

-wade
 
350HPZ said:
I checked for leaks vacumm is at 20in. Im faxing the dyno sheets to steeda so they can help out.Am I the only one that thinks 241 is low for what I have?
Look at my mods and dyno. My dyno was in high 80's farenheight, and before Plenum and Throttle body which probably gave me around 8rwhp.
219150_46_full.jpg

If you do the 15% loss, you are making almost 285hp at the flywheel and around 330 torque. Thats a 25hp gain over stock and about 28torque gain over claimed stock numbers.
Your intake and throttle body probably gave you like 6-8rwhp. Underdrives give between 2-8rwhp. I got 4rwhp from my dyno tune so i'd expect similar from yours. Mufflers probably gave you 2-3rwhp. Optimistically you could expect 23rwhp over stock and you are at 25.. so it all makes sense. your numbers are fine.