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Old Nov 1, 2005 | 09:18 PM
  #1  
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From: EARTH
Question whats wrong

hi everybody
we just dynoed my friends car and i think its bit low what do you guys think?
the car is 99 m6 z28
mods:
flowtech long tube headers
true duals
ls6 intake
bbk 80mm throttle body
spec stg 3
almu flywheel
air lid (stock filter)
stock gears
no tune
the car dynoed 318rwhp 327rwtq is it good?
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Old Nov 1, 2005 | 09:46 PM
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you sure thats not the before numbers, stock ls1's dyno that ****. post the graph.

Last edited by jrp; Nov 1, 2005 at 11:33 PM.
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Old Nov 1, 2005 | 09:56 PM
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i know my friend is very angry he was gonna install the T-REX
this week . i dont have a scanner but i ll try to post the graph
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Old Nov 1, 2005 | 11:39 PM
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That sounds really weak. Something is wrong.
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Old Nov 2, 2005 | 01:19 AM
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I would scan it and see what the advance is. I'm going to venture a guess that since the intake has been off that one of the knock sensor wires got pinched.
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Old Nov 2, 2005 | 08:23 AM
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I would guess a tune would net more hp what A/f was he at with those #s
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Old Nov 2, 2005 | 10:19 AM
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What type of dyno was it if it was a mustang dyno seems about right for a 99.
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Old Nov 2, 2005 | 02:28 PM
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He almost has full bolt ons i would say that isn't normal 99blkz28 he should be puting down more like 340 to 350. A tune would only help so much, check to make sure you have no air leaks and all the gaskets are on good.
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Old Nov 2, 2005 | 10:44 PM
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Originally Posted by ls1wannabe
He almost has full bolt ons i would say that isn't normal 99blkz28 he should be puting down more like 340 to 350. A tune would only help so much, check to make sure you have no air leaks and all the gaskets are on good.
No on a mustang dyno that is about right i have the same mods as he does but a tune as well. I put down 317 on a mustang dyno. On a dynojet which most people go by its around 345-350rwhp which is about right for the mods.
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Old Nov 2, 2005 | 11:34 PM
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Well Buy a K&N air filter this would help some I think.
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Old Nov 3, 2005 | 05:41 AM
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Originally Posted by MAXIMO
Well Buy a K&N air filter this would help some I think.


You're not being serious are you.
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Old Nov 3, 2005 | 05:49 AM
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Originally Posted by 99Blk Z28
No on a mustang dyno that is about right i have the same mods as he does but a tune as well. I put down 317 on a mustang dyno. On a dynojet which most people go by its around 345-350rwhp which is about right for the mods.


I agree totally, to many people read far too much into dyno numbers. And besides the mods listed are no where near FULL bolt ons, and there is no gaurantee they all make power.

the car is 99 m6 z28
mods:
flowtech long tube headers - yes these should imporve BHP, but if it started with 280-300 rwhp it has gained. Also a tune would be worth while.
true duals - what setup, you could easily loose power with a poor dual setup, it's all about flow rate. What mufflers are used.
ls6 intake - again it should make power, but was it definatley an LS6 intake? Many people have bought 2nd hand ones only to later find out it's an LS1 intake. A tune is vital
bbk 80mm throttle body - again no tune = pointless. Plus the stock TB actually flows pretty decently.
spec stg 3 almu flywheel - only minimal gains on a dyno, but should improve throttle response
air lid (stock filter) - again....
stock gears - so
no tune - probably the biggest culprit
the car dynoed 318rwhp 327rwtq is it good? - yes and no. A tune has the potential to find another 15-20rwhp. And there's no way a car with those mods should be making more than 340-350rwhp.

Plus as mentioned already, what type of dyno was it on? Even the tyre pressures could have effected the results by 1-3rwhp.
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Old Nov 3, 2005 | 10:09 AM
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Originally Posted by venom ws7
hi everybody
true duals
ls6 intake
bbk 80mm throttle body
spec stg 3
almu flywheel
air lid (stock filter)
stock gears
no tune
the car dynoed 318rwhp 327rwtq is it good?
Well sort of he dose have the stock air fliter. After that get a tune that should help out as well. But still good numbers for just bolt ons. Have you done the free mods??
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Old Nov 3, 2005 | 07:12 PM
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K&N won't do a thing for the car, IMO they aren't worth the risks (over oiling and possibly ruining the MAF). If these numbers are from a Mustang dyno then they are right in line. A tune will always help, sometimes more than you think.
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