Dissapointing Dyno Numbers - Page 3 - MustangForums.com


4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 12-30-2009, 01:58 PM   #21  
lilcrate
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Originally Posted by teej281 View Post
Also, you said you are in need of a tune in your sig...so you might just want to have the tune done on it. Might pick up some power from a retune.
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Did you have the car tuned for these cams or did you just do a couple of pulls? My base run with cams was 265rwhp and I picked up over 20rwhp from the tune.
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Thats about 25-30rwhp less than what it should be..did you get a tune?
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Good point, take this thing to the track and see what it traps... that will give you an idea of how it's performing.

But to my first point, if this thing hasn't been tuned since the cams, lay off it because you're probably going pretty lean up top.
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+1 on the dyno tune suggestions if you haven't already gotten one.

read this...

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I went and got my car dyno tuned today and it only put down 271RWHP and 282RWTQ :
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Old 12-30-2009, 02:46 PM   #22  
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^^^ You read my mind...i was just getting ready to make that post! lol
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Old 12-30-2009, 03:12 PM   #23  
02 Silver GT
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Ya those numbers are with the tune the base numbers were like 250-260 and no i didnt degree them i just set up the timing with the factory cam gears and the timing marks
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Old 12-30-2009, 03:15 PM   #24  
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....apparently reading pwnes me.

Last edited by amoosenamedhank; 12-30-2009 at 03:27 PM.
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Old 12-30-2009, 03:17 PM   #25  
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Does the car feel significantly stronger? What was your a/f ratio just out of curiousity?
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Old 12-30-2009, 03:56 PM   #26  
02 Silver GT
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Does the car feel significantly stronger? What was your a/f ratio just out of curiousity?
Ya i pulls like crazy even down low and the a/f is right around 13.2ish when i fist got there it was at like 15.5 it was rediculous....lol
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Old 12-30-2009, 04:28 PM   #27  
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Retarding the cams would result in a lose in JUST the midrange, right? Or would it affect the top end also?
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Old 12-30-2009, 05:27 PM   #28  
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Retarding the cams would result in a lose in JUST the midrange, right? Or would it affect the top end also?
If they weren't both the same it could cause on bank to have lower compression,hurting the power the whole powerband. A compression check will tell you pretty fast.
My tuner called a few weeks ago telling me about a Procharged Mach he was tuning that was about 100 rwhp shy of expectations. I suggested a bank to bank compression check since the motor had been assembled by the owner. Found one intake cam had slipped a couple of teeth during assembly. Lucky it didn't have any PTV. After degreeing the cams they picked up the lost 100rwhp.
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Old 12-30-2009, 05:32 PM   #29  
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As long as it's not to excessive it'll be mainly the low and midrange that suffers.
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