Classic Trucks '47-'98 GM Trucks - Performance | Conversions | General Discussion

Benchmark that 383!

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Old Nov 2, 2010 | 09:21 PM
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The Fiddle's Avatar
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Default Benchmark that 383!

1999 350 roller block
.030" over
SCAT 3.75" cast steel crank
KB dished pistons
Lunati Voodoo 60120:
-Advertised Duration (Int/Exh): 262/270
-Duration @ .050 (Int/Exh): 211/219
-Gross Valve Lift (Int/Exh): .507/.515
-LSA/ICL: 112/106
Estimated 9.6:1 compression ratio
Comp 918's & 787's
Comp 1.52 ratio rocker arms
Vortec heads with 3 angle valve job and a little bowl work, nothing more.

....running on stock Vortec 350 exhaust with catback.

What do you guys believe this engine is making now, and what do you think it would make with some Pacesetter longtubes and 2.5" duals?

Last edited by The Fiddle; Nov 2, 2010 at 09:55 PM.
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Old Nov 2, 2010 | 09:45 PM
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425-450? thats my guess but what do i know i had a 338 similar to it and made around 500 ish
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Old Nov 2, 2010 | 09:56 PM
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Well it definitely isn't making that
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Old Nov 2, 2010 | 10:15 PM
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I would say its in 365 hp area.. Nothing spectacular, but prob a good running mouse. The cam is kinda on the small side.. What intake setup you running?? carb'd TB injection, efi?? If it is carbed is it single or dual plane intake??


What was the comp on that 338 you had that was making 500 hp??? and high high you winde it up??
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Old Nov 2, 2010 | 10:44 PM
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Stock Vortec 350 intake.
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Old Nov 2, 2010 | 10:51 PM
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So thats a tbi injection correct??
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Old Nov 2, 2010 | 10:55 PM
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The CSFI poppet spider injection.
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Old Nov 2, 2010 | 10:56 PM
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No, it would be the SFI system with the plastic intake. Spider style injector. Between the fuel system, and the stock exhaust, I wouldn't put it much over 325 hp. It's really choked down.
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Old Nov 2, 2010 | 10:57 PM
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Originally Posted by The Fiddle
The CSFI poppet spider injection.
Haha, you typed faster than I did!!
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Old Nov 2, 2010 | 11:05 PM
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Originally Posted by The Fiddle
The CSFI poppet spider injection.
Oh ****, im wit AK its def choked down. Do away with that and put a single plane and carb on it They make a mini injector upgrade for that, but won't get you much more hp if any, due to the mani set up
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