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turbo ls1.. wheres the power

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Old 12-20-2010, 06:13 PM
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Default turbo ls1.. wheres the power
Took my truck to the dyno today at Texas Speed. It made 387/358??? Anybody heard of a turbo truck making numbers this low? I was expecting a full 100 more hp/tq!! specs are as follows.

fully forged ls1
mp70 trick front mount turbo kit@ 6psi
comp cams 221/228 581/588
stock 243 heads
42# injectors and a walbro 340 intank
4:10 gears and 20" stockers



Truck feels strong but the numbers dont reflect it. My question is what do you guys think about these numbers?
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Old 12-20-2010, 06:15 PM
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More info. Is it intercooled? What kind of dyno?
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Old 12-20-2010, 06:16 PM
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What's the LSA of the cam?
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Old 12-20-2010, 06:21 PM
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Do you know what it made before the turbo was installed, and who tuned it?
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Old 12-20-2010, 06:21 PM
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it was a dynojet and yes is has an air to air intercooler..
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Old 12-20-2010, 06:24 PM
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I dont know what it made before the turbo was installed.. did the whole thing at the same time. Its a 114 lsa cam shaft
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Old 12-20-2010, 06:28 PM
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That seems low to me too. Did you ask the guy that tuned it? He would have the best idea why it was low.
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Old 12-20-2010, 06:31 PM
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Jason at Texas Speed acted like these numbers were perfectly normal. He is also the one who tuned it. The tune seems fine; a/f ratio is good.
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Old 12-20-2010, 06:40 PM
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hmm does seem low being there are cam only ls1's making over 400
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Old 12-20-2010, 06:42 PM
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What size tires you running?
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