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

Bad dyno =(

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Old 11-04-2013, 05:56 PM
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we need detailed info. this is the equivalent to Stevie wonder building a house of cards.
Old 11-04-2013, 06:36 PM
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Put the Procharger back on it with some 60# injectors and get it retuned!!!
Old 11-04-2013, 06:58 PM
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Default im taking some advise and heres some feedback

I am probably gonna put the supercharger back on this weekend.
it has a tune with that charger so it will run perfect.

I am concerned it will blow again, so im ordering a pulley for less boost.

Compression after reassembly was 165psi across the board give or take 2-3 psi.
Cam was a CompCams 306.

The dyno AFR has it at 11 which means too rich... right?

As one poster mentioned on the street and track the car pulls hard.
i was smoking 1st 2nd and 3rd. and got a 9.40 on the 1/8 mile
so best on street tires was 9.1 on the 1/8 mile.
M6 with 3.23 gears.
Im gonna swap the gears to a 3.73 GM set I have in the garage.

Im thinking along the lines one guy mentioned is that its smoking 1,2,3 so no way in hell is that 266 HP.

IS there anyway that dyno didnt read the car right?
he was pulling timing off 7th cyl., not 1st....????

I did look into my datalog and the car was getting knocks and timing retard.
so that explains why no high hp, I guess.
but at the same time it pulls hard and smokes the tires. hrmmmm...

Last edited by dually681; 11-04-2013 at 07:07 PM.
Old 11-05-2013, 09:26 PM
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9.4 in the 1/8 backs up your dyno. To put that in perspective my 300ish rwhp m6 does 8.0.
Old 11-06-2013, 05:09 AM
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What was the 1/8 mile mph? That will change less than ET with a bad launch.
Old 11-06-2013, 08:07 AM
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Originally Posted by dually681
he was pulling timing off 7th cyl., not 1st....????
IIRC it does not matter what plug wire is referenced. Just whatever wire is most accessible, and in our cars that is usually #1. It is used for plotting the torque curve.



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