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Old 02-08-2003, 04:08 PM
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Post How much HP on my new 383 engine, plus some questions for the pros!

Hi everyone! Just found this great fourm on the internet

I should have my new all forged 383 engine back from the shop in two weeks and was wondering what you guys though it would make in HP and Torque?

Late Model small block 383 CID forged 4340 crank and 6" rods.
Bore- 4.030"
Stroke - 3.75
Comp ratio approx 9.0 to 1
Crower roller cam 00401LM
www.kctrading.net/sierra/

<a href="http://www.dragtruk.com/ENTRIES/VJOD67STSGNO.html]http://www.dragtruk.com/ENTRIES/VJOD67STSGNO.html[/URL]


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Old 02-08-2003, 04:52 PM
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Tq 427@3500 HP 340@4500
Must use at least 21 lbs.hr injectors.
80 mm TB can flow 1189 cfm (just so you know)
Recommended cam is 219/220 .455/.461

Blower Added:
Tq 554@5000 HP 572@6000
at least 45 lbs/hr injectors
This was using the recommended 252/264 .575/.609 cam.
EXTREMELY low idle vacuum. VERY rough idle.

I vote you spray it as well.........

The Vandal
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Old 02-08-2003, 05:11 PM
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Tuning/tweaking is as important as anything.
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Old 02-08-2003, 09:00 PM
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I bet it will make 35,000 horsepower naturally asperated but with the blower it would make close to a million.
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Old 02-08-2003, 09:41 PM
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ha ha ha

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Old 02-09-2003, 06:29 AM
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[quote]Originally posted by The Vandal:
<strong>Tq 427@3500 HP 340@4500
Must use at least 21 lbs.hr injectors.
80 mm TB can flow 1189 cfm (just so you know)
Recommended cam is 219/220 .455/.461

Blower Added:
Tq 554@5000 HP 572@6000
at least 45 lbs/hr injectors
This was using the recommended 252/264 .575/.609 cam.
EXTREMELY low idle vacuum. VERY rough idle.

I vote you spray it as well.........

The Vandal</strong><hr></blockquote>

Vandal what program did you use to figure this out?

Also if I upgrade to a bigger SC and run 15psi of boost what would the numbers be?

Also, cam quoted is the biggest I can run and still pass smog with a good idle too

Ken
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Old 02-09-2003, 08:02 AM
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Engine Analyzer v3.0

That small cam with the huge throttle body and a blower is a dog. There's over 100 HP waiting with just the cam change. I don't know what to tell you - if you want to make big numbers you do it with the big cam, and you lose the nice, subtle idle.

More boost=more power=more tire spin with a truck with mudders,etc. Could you hook up 572 HP? You want more? Good luck with it.....

The Vandal
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Old 02-09-2003, 10:28 AM
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[quote]Originally posted by The Vandal:
<strong>Engine Analyzer v3.0

That small cam with the huge throttle body and a blower is a dog. There's over 100 HP waiting with just the cam change. I don't know what to tell you - if you want to make big numbers you do it with the big cam, and you lose the nice, subtle idle.

More boost=more power=more tire spin with a truck with mudders,etc. Could you hook up 572 HP? You want more? Good luck with it.....

The Vandal</strong><hr></blockquote>


Have you ever seen the inside of a truck SFI intake?

V6 pictured:


There are 8 spider tubes in there on a V8 that just kill the power/flow above 4,000 rpms....I might concider a bigger cam if someone made a aftermarket intake kit that was smog legal in CA I know Edlebrock makes one for pre96 truck...wish they would make one for us!

I have a friend up in UT who is running the same engine and SC bu runs the next stage cam and still passes smog but he's up at 4400 feet which helps it pass.

<a href="http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00402LM&x=35&y=7" target="_blank">http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00402LM&x=35&y=7</a>

Ken

[ February 09, 2003: Message edited by: Ken-96GMC K1500 SC ]</p>
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Old 05-13-2004, 02:07 PM
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i have wondered about the vortec heads also, being that the double hump has proven itself over time, but i hear the vortec's are making a huge splash, i just didnt know what to get, so finally i said ******* it and went out and ordered a new set of dart pro 1 aluminum 215cc heads, now i hope they will flow better than the vortec heads plus there aluminum so even tho i spent a few dollars more than i woud have liked too i hope i have a set of heads ill never have to mess with or change exp since i dont really plan on kickin the crap out of my motor just a daily fun toy with every now and then strip duty but nowhere near the abuse of a bracket motor...
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