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More 383 parts on order, HP/TQ guesses now?

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Old Aug 6, 2001 | 05:05 PM
  #1  
SMasterson's Avatar
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Joined: Jul 2001
Posts: 404
Likes: 1
From: Evansville, IN USA
Car: '89 GMC Pickup
Engine: 383 SBC Stealth Ram
Transmission: 700R4/VIG 3200
More 383 parts on order, HP/TQ guesses now?

I'm adding an ACCEL STREET RAM MANIFOLD BASE
Stock# 74197 and SLP runners before I fire it up. Next I'll have to get a programmer and Tunercat I suppose.

Anyone care to guess, or run this through a Desktop Dyno, and tell me how much HP/Torque I'm going to make?

383 stroker:
638 .030 over, roller motor block, 0 decked
fully balanced by a pro
Scat 3.75 crank
Eagle 5.7 rods
SRP 11:1 pistons (flat tops)-5cc
SLP 51006 Hydraulic roller, Comp cams timing gear and chain installed straight up.
in: .495" 270 218
ex: .502" 276 224
TrickFlow 23 degree aluminum heads w/.039 quench
1.5 Harland Sharp roller rockers
Ported plenum with all of the mods, huge K&N filter through 3" SS pipe through the MAF,
24# SVO injectors, custom chip
373 gears with 295/50/15 rear tires
A 700r4 that's been modified and shifts great
Hooker full length competition headers with 2.5" pipe all the way through dual two chamber Flowmasters

All in a 1989 GMC short bed stepside pickup, 4040 pounds with driver. All third gen. engine and tranny, wiring, etc., just to keep the message board topic correct!

http://members.sigecom.net/smaster/383fronts.jpg

Thanks in advance!

------------------
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SMasterson

[This message has been edited by SMasterson (edited August 06, 2001).]

[This message has been edited by SMasterson (edited August 06, 2001).]
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Old Aug 9, 2001 | 12:21 AM
  #2  
JoelOl75's Avatar
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20 Year Member
 
Joined: Jan 2001
Posts: 1,978
Likes: 0
From: PA
Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
That's very similar to my buildup, I think we should be in the high 400 hp range. I was planning on hogging out the plenum/SLP runners/intake siamesed with a 58mm throttle body. I'm going with a flat cam though, 234/234 @ .050" on a 114LSA and Desktop Dyno showed around 480hp and a 12.1 1/4 mile time in a 3500 car with a 180 lb driver (With a victor jr and 850 holley though...)

The cam you picked was similar to the first cam I did! I had to send it back. The guy I got the stroker kit off of called me and he was an engine builder also. He told me that you NEED a more radical cam pushing 11:1 or you're going to run into detonation in the low/midrange. Cylinder cranking pressure will be over 200psi with a milder cam. He recommended this cam to me from Summit (292adv 234@.050" .488" lift on 114LSA) and told me to stick it "straight up" and use a 2,500 to 3,000 stall converter. He also told me to use the single pattern cam with those heads and a "free flowing" (No cat, loud muffler) exhaust. If you are going to use a cat he said to go with the dual pattern. But just haphazardly assuming a dual pattern is the right choice could be just making idle worse and pumping more unburned fuel right out the tailpipe. Trick Flows have a good intake to exhaust flow ratio so the dual pattern might be a waste.

Just what I was told, I really didn't know myself.

http://www.geocities.com/joelol75/index.html



[This message has been edited by JoelOl75 (edited August 09, 2001).]
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Old Aug 9, 2001 | 08:02 PM
  #3  
richie rich's Avatar
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Joined: Aug 2001
Posts: 17
Likes: 0
From: hollywood,md,usa
I have a 355 tpi with a 230/230 .512 lift flat tappet cam trickflow g-2 heads and 11-1 compression. the motor really pulls off the line and it spins 275/50-15's on 15x10 wheels. My best 1/4 is 13.01@100mph and a 1.71 60ft. I have done some porting and now my car only runs 13.30 with a 1.9 60ft. Does anyone know where I can find a flow chart on these heads?
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