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

Going to the Dyno the day after tomrrow, What you think?

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Old 10-30-2009, 04:29 PM
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Well got my dyno numbers back

250rwhp/300rwtq. Not wat i was expecting, but i have issues

Now i have just recently had trouble with the truck, took it to the dyno today and it put out 250hp/300tq to the wheels but the air/fuel ratio is not where its supposed to be, it idled at 16.1 and at 4k+ it really leaned out, if i can get a pic up i will of the chart, but I am not sure if the fuel pump is not effecient enough for the lt1 (i have my stock 2.8v6 pump in the tank still) or if injector(s) are bad. If anyone has input please let me know.

let me try to get the graph up here so you can see it visually.


Last edited by llorracs93s10; 10-30-2009 at 04:39 PM.
Old 10-30-2009, 04:46 PM
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I'd say you're missing about 100-120hp
Old 10-30-2009, 05:23 PM
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ha, i was close with my two fitty four horsepower!
Old 10-30-2009, 06:04 PM
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i would start at upgrading the fuel pump
Old 10-30-2009, 10:10 PM
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Originally Posted by nik1703
I'd say you're missing about 100-120hp
honestly if that is true, i will give you 5bucks....lol not kidding.
Originally Posted by Badazz 97 TA
ha, i was close with my two fitty four horsepower!
i hate you! lol
Originally Posted by boneslb9
i would start at upgrading the fuel pump
what do you guys think, walbro or whatever its called 255 pump? and are they universal, the drop in tanks or wat?
Old 10-31-2009, 02:58 PM
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What size injectors do you have? I'd get rid of that pump, for sure! Walbro or Racetronix.



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