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Author Topic: Disapointing dyno numbers, need opinions
LSV1970
New Member
Member # 2056

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2002 Z28 A4 (2.73:1) 15000mi, export version (288HP rated with the V6 one on the left exhaust), Gas 95 octan
mods: CAI, SLP PP air lid, SLP 85mm MAF, bellow, 1.85:1 SLP rocker arm package (spring and ti retainers), SLP Y-pipe and SLP PP dual-dual carback.
Everything installed by LS1tech. The car is pulling really hard and everything is fine. Oil changed on the same day.

The dyno is a Bosch:
The mesure was done on "2" (not D... ), speed 103mph, temp 29°C (85°F) and press 964mbar (725mmHg)... corrected the car pulled only 309rwHP wich appeared to be very low with so much mods...with a 12% driveloss 346HP.
I was waiting something like 335rwHP. Does anybody has an idea of what's wrong?

And a last thing I don't understand: the curve went up to the limiter (6200rpm) and then cut. So my car has 309rwHP@6200rpm

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2002 export Z28, 1 of 9 sold in Switzerland. Lots of SLP PP mods...

Posts: 19 | From: Switzerland | Registered: Aug 2003  |  IP: Logged
White Lightning
1st Gear
Member # 363

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In the United Stated the most popular dyno is a Dynojet dyno. The numbers from your dyno can not be compared to the ones you see posted here. The two dyno calculate rwhp differently.

Can you post a picture of the graph ?

Rob

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Robert
96 Z28 SS #2056
396 LT4 Stroker w/NOS
www.96z28ss.cz28.com
www.nedyno.com
www.dynotune.org

Posts: 191 | From: Worcester, MA | Registered: Mar 2000  |  IP: Logged
LSV1970
New Member
Member # 2056

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No but you got mail.
BTW a 2000 Vette A4 with dual K&N conical, 80mm TB, 1.85:1 SLP rocker arms, Bassani X-pipe and B&B exhaust put 386rwHP on "D" on the same dyno 3 months ago. [Confused]

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2002 export Z28, 1 of 9 sold in Switzerland. Lots of SLP PP mods...

Posts: 19 | From: Switzerland | Registered: Aug 2003  |  IP: Logged
killabee
1st Gear
Member # 860

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Considering the CAI won't dyno, Bellow and
MAF may not yield anything, Y-pipe is questionable
too, I don't think the numbers are that bad.
remember you can't just add up all the numbers that the ads say and figure to have that much
more HP.

Your right though the peak at 6200 is odd

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99 Black SS #0275

Posts: 189 | From: Steeler Country | Registered: Jan 2001  |  IP: Logged
killabee
1st Gear
Member # 860

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Also A4's have more parasitic loss than
M6. 12% is the T56 loss, A4 is more in the
15-18% range.

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99 Black SS #0275

Posts: 189 | From: Steeler Country | Registered: Jan 2001  |  IP: Logged
JeffY
3rd Gear
Member # 120

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quote:
Originally posted by killabee:
Also A4's have more parasitic loss than
M6. 12% is the T56 loss, A4 is more in the
15-18% range.

Not if the convertor is locked.
Posts: 1163 | From: Rochester Hills, Mi | Registered: Feb 2000  |  IP: Logged
   

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