New Best Time...
Thread Starter
Junior Member

Joined: Nov 2001
Posts: 96
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From: Palos Hills, IL
Car: 1988 IROC
Engine: 383 SP
Transmission: 700r4
Axle/Gears: Dana S60 4:10
New Best Time...
Saturday night went from a 13.06 @ 105mph 1.97 60ft. to a 12.18 @ 111.1 1.79 60ft. Hello 383!!
Gary
Gary
Junior Member
Joined: Jan 2003
Posts: 66
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From: Long Island, N.Y.
Car: 90 IROC-Z
Engine: 383 Miniram
Transmission: 700R4
Was this the first time out with the new combination or did you go through alot of tuning? Any suspension or tire changes for the drop in 60' time? Anyway, I think it's quick.
Thread Starter
Junior Member

Joined: Nov 2001
Posts: 96
Likes: 0
From: Palos Hills, IL
Car: 1988 IROC
Engine: 383 SP
Transmission: 700r4
Axle/Gears: Dana S60 4:10
I'm using the afr 190s, lingenfelter 219 cam and edelbrocks tes headers with a superram. No tuning at all. The chip I'm using is from the car when I still had the 350. No suspension work at all and yes, it was the first time out with the 383. Hopefully 11s right around the corner!!
Gary
Gary
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Joined: Nov 2000
Posts: 812
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From: Indpls IN US
Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4
What kind of car are you running and what are your other mods such as rear gearing, stall, etc.? I've got the same parts on a 383 shortblock, which should used as a boat anchor in it's current state rather than as the foundation of a hi-perf. engine. I just posted my new time from the track, I think my rings are in about a hundred pieces, each.
Supreme Member
iTrader: (1)
Joined: Sep 2002
Posts: 2,565
Likes: 10
From: Texas
Car: 1992 Formula Firebird
Engine: 305CID (LB9)
Transmission: World Class T5
Axle/Gears: 10-bolt, 4.10 gears
Did you build your 383 or buy the whole thing? Does it pass emissions? I am curious because I am planning to drop a 383 in my car. I need to know how to make the most power and be able to pass emissions.
Last edited by 87WS6; May 28, 2003 at 06:14 PM.
Thread Starter
Junior Member

Joined: Nov 2001
Posts: 96
Likes: 0
From: Palos Hills, IL
Car: 1988 IROC
Engine: 383 SP
Transmission: 700r4
Axle/Gears: Dana S60 4:10
It's a '88 Iroc. Stock 3.27 gears, no suspension work done yet. I took the 350 out and took it to mickey at NAC. He does alot of IRL motors for the indy guys. Anyway, he did the short block for me. I used the KB pistons with the 5.7 rods and scat 9000 crank. He decked the block. The KBs I picked out have a 16cc dish, along with the 58cc AFR's, it works out to right at 10.4 cr. I put a Transgo kit in the 700 tranny along with the 2800 PI converter. The car is a torque monster to say the least.
Gary
Gary
Senior Member
Joined: Jul 1999
Posts: 784
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From: Sacramento, CA
Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Wow. There are several people on these boards that have extremely similar setups (some with suspension mods) and 12.1 is by far the best I've seen. You went from 13.06 to a 12.1 and all you did was change the motor from a 350 to a 383?
Thread Starter
Junior Member

Joined: Nov 2001
Posts: 96
Likes: 0
From: Palos Hills, IL
Car: 1988 IROC
Engine: 383 SP
Transmission: 700r4
Axle/Gears: Dana S60 4:10
Danny T.,
Went from the 350 to the 383 along with the PI2800 converter, everything else came of the 350 to go on the 383.
Gary
Went from the 350 to the 383 along with the PI2800 converter, everything else came of the 350 to go on the 383.
Gary
kwik88 i was wondering what you shift your car at because next week im taking my car to the track and ive herd people shiftin from 5400-6000 with this combo, but not to many people have 383's like us.
Thread Starter
Junior Member

Joined: Nov 2001
Posts: 96
Likes: 0
From: Palos Hills, IL
Car: 1988 IROC
Engine: 383 SP
Transmission: 700r4
Axle/Gears: Dana S60 4:10
JohnnyIroc,
I'm shifting around 5600. I've never had a engine before like this one that is instant rpm's. I think it's more the PI converter that gives the extremely fast r's. If yours revs as fast as this one does, you better be ready with that next gear!! Let me know how you fair at the track.
Gary
I'm shifting around 5600. I've never had a engine before like this one that is instant rpm's. I think it's more the PI converter that gives the extremely fast r's. If yours revs as fast as this one does, you better be ready with that next gear!! Let me know how you fair at the track.
Gary
first and second gear are rediculously quick with this motor, so im just trying to find the right shift point now. Next week im getting the car dyno tuned so ill let you all know what she puts out, and next weekend ill have the car at the track.
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