LT1-LT4 Modifications 1993-97 Gen II Small Block V8

dyno results too low???

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Old Jun 7, 2006 | 12:29 PM
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Default dyno results too low???

I had my 94 Z28 dynoed the other day after I added:
- magnaflow catback
- edelbrock shorty headers
- k&n cai
- tb bypass
- 52mm tb
- hypertech pp

It made 255 rwhp. It's an A4 so I know there's going to be more driveline loss but I expected more. What numbers are you guys with similar mods making?
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Old Jun 7, 2006 | 12:35 PM
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So basically you got intake and exhaust. The hypertech and the throttle body bypass aren't really gonna effect your dyno that much the only mods that are gonna show a decent gain are gonna be your cai and exhaust. The numbers aren't too bad maybe slightly lower than what they should be. If you even consider 16% drive loss that puts you at 303 hp at the crank. That isnt too bad considering the 95 and lower were rated at 275 from the factory. When is the last time a good tune was performed? Maybe some new plugs, wires, oil, and etc. might give the z some good help.
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Old Jun 7, 2006 | 12:40 PM
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Forgot to mention a full tune up was also done. New plugs, wires, etc.
I estimate that stock it should make around 230, so +25? (exhaust) + 10? (intake) + 5? = ~ 270?

Oh yeah, the guys at the speed shop said the computer would retrain itself and power would go up a bit. Is this true?
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Old Jun 7, 2006 | 12:41 PM
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He is an A4, so that is around 22.5% Drivetrain loss.
It seems low, I dynoed at SAE 262RWHP/300RWTQ, and that was a K&N Filter, Pacesetter Mids, Slowmaster Muffler, and a stock tune. I have an A4 also.
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Old Jun 7, 2006 | 12:43 PM
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Computer only makes small adjustments, like air/fuel ratio, and timing.
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Old Jun 7, 2006 | 12:44 PM
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hows it running? transmission good?

Last edited by blkchevyz; Jun 7, 2006 at 12:50 PM.
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Old Jun 7, 2006 | 12:48 PM
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My 97 a4 with a blow master and CAI put 264 to the wheels
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Old Jun 7, 2006 | 12:52 PM
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Their dyno could of been off...
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Old Jun 7, 2006 | 01:02 PM
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spray it.
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Old Jun 7, 2006 | 01:13 PM
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The car runs great. Only 50K original miles. I guess the dyno could be off or I might just have a friday car
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Old Jun 7, 2006 | 01:16 PM
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If I was you I would find out if the Hypertech is causing you knock. Basiclly it's worthless from what Ive read. I wouldnt be surprise if it's the reason your numbers are low. Get a real tune from a vendor and start adding some serious mods. Youre really not that far off. We dont even know if theyre corrected or not.
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Old Jun 7, 2006 | 01:18 PM
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Doubt the dyno is off. Id blame the car first, dyno last.
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Old Jun 7, 2006 | 01:20 PM
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was it a dyno jet? or mustang dyno
did they use a wideband o2?

just hit the track and see what it does.
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Old Jun 7, 2006 | 02:11 PM
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it was a dyno jet? does that make a big difference?
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Old Jun 7, 2006 | 02:20 PM
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Originally Posted by ground_pounder
it was a dyno jet? does that make a big difference?
Dyno Jets give you an accurate rating where as Mustang Dyno's generally dyno less.
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Old Jun 7, 2006 | 03:10 PM
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255 sounds about right. Maybe even a little high.

Originally Posted by ground_pounder
Forgot to mention a full tune up was also done. New plugs, wires, etc.
I estimate that stock it should make around 230, so +25? (exhaust) + 10? (intake) + 5? = ~ 270?

Oh yeah, the guys at the speed shop said the computer would retrain itself and power would go up a bit. Is this true?
Intake and exhaust isn't going to add 35hp . Probably more like 10. If your lucky, 15.
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Old Jun 7, 2006 | 03:15 PM
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Are you still running the stock y pipe with your shorties? Your not gonna see much gain with shorties anyway, but the stock Y sucks also.
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Old Jun 7, 2006 | 03:40 PM
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Originally Posted by slowmofo
Are you still running the stock y pipe with your shorties? Your not gonna see much gain with shorties anyway, but the stock Y sucks also.
the edlebrocks come with a y-pipe
had them, and loved them for the price
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Old Jun 7, 2006 | 03:44 PM
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Originally Posted by blkchevyz
the edlebrocks come with a y-pipe
had them, and loved them for the price
ahh good too know....
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