Accel runners siamese?
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From: Freehold NJ
Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Accel runners siamese?
Hello. On one of my 87s I have a set of accel runners. It is a stock l98 with headers exhaust and 2400 converter. I was thinking to take the runners and siamese them and port the plenum. Is this a good idea? If i remember you siamese them up top where they bolt to the plenum. I'd like to see some more rpm power with the car. Then i'll tune it. What do you guys think? Is it worth the effort? Cam and heads will be done later Thanks. Chris.
Last edited by mrestrictrplate; May 11, 2016 at 06:24 AM. Reason: Content
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
I'm confused. Was there a question here or were you just commenting to let people know what you were doing?
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From: Freehold NJ
Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Joined: Oct 2001
Posts: 12,213
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Accel runners siamese?
Yeah, have at it.
Joined: Feb 2001
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From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
Re: Accel runners siamese?
I had a stock L98 with zz4 cam and exhaust. I picked up about 500 RPM with heavily ported SLP runners and ported plenum. Never dyno'd though, so I can't speak to the actual numbers. ...and it didn't feel faster really, but it definitely pulled higher, so that translates into performance.
....now add an aftermarket/ported base, and do heads and cam, and that's where that ported will really shine.
....now add an aftermarket/ported base, and do heads and cam, and that's where that ported will really shine.
Joined: Nov 2008
Posts: 2,093
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
I'd like to hear your results too. I'm eventually changing my stock tpi with ported parts I have on hand but my long block is modified with ported heads and cammed, so my experience may be different.
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From: Indy
Car: 88 IROC-Z
Engine: GEN 4 LY6 (going forged 408)
Transmission: 60E (going RPM LEVEL 6 4L80E)
Axle/Gears: 7.5" 3.42 (staying...)
Re: Accel runners siamese?
I have a FULLY worked tpi (1.75" ports - 1206 base) and I shift it at 5500. (some times 56-5700) only been to the track one though with it. 3 runs with issues and such but the third run I knocked .3 off reving to 5500 ONE time (first gear).
i plan to go back in a few weeks after I fix some things. The higher I reved it the faster it went, both mph and e.t.
-(stock tpi ports are 1.48")
i plan to go back in a few weeks after I fix some things. The higher I reved it the faster it went, both mph and e.t.
-(stock tpi ports are 1.48")
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From: Sanctuary state
Car: 67 ******mobile
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Axle/Gears: 4.11
Re: Accel runners siamese?
If it was staying stock id say no on the siamese think its overrated or a crutch for a base that hasnt had enough work
If you really want to make those hum, take a bandsaw cut them in half then go after them, wel together grind smooth and paint.
Siamesing wont hurt....but its a chitpot of work for ??gain. BTDT
Do not siamese your base
If you really want to make those hum, take a bandsaw cut them in half then go after them, wel together grind smooth and paint.
Siamesing wont hurt....but its a chitpot of work for ??gain. BTDT
Do not siamese your base
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Member
iTrader: (2)
Joined: Nov 2013
Posts: 297
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From: Freehold NJ
Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Re: Accel runners siamese?
If it was staying stock id say no on the siamese think its overrated or a crutch for a base that hasnt had enough work
If you really want to make those hum, take a bandsaw cut them in half then go after them, wel together grind smooth and paint.
Siamesing wont hurt....but its a chitpot of work for ??gain. BTDT
Do not siamese your base
If you really want to make those hum, take a bandsaw cut them in half then go after them, wel together grind smooth and paint.
Siamesing wont hurt....but its a chitpot of work for ??gain. BTDT
Do not siamese your base
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