e-man

Im on a buget witch runners would be better? With the SLPs I would grind the dividers out as much as I could top and bottom or just clean up the edelbrocks and throw them on.

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.01@98mph without cam

Kevin91Z

iTrader: (1)

I'd save up for some drag radials first. They'd give you more of an ET reduction than runners would. But if you're using the stock cam, either runners would work.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

e-man

I just got a set of BFG-drag radials for christmas and the cam is a comp cam .480/.480-210/220-112LSA

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.01@98mph without cam

Yelofvr

With your combo, I would recommend the edelbrock large tube runners at full length but with the rough inside finish removed using sanding rolls. If you remove the divider in the SLP's you will lose torque everywhere below 4000 rpm. This mod effectively shortens the runner length to less than the superRam. I personally dont feel it is worth the trade off. If you are into high rpm power only then go with the slp's hogged out. With your cam, displacement and other mods, I'd stay with a long tube setup

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Dave Zelinka

F22Raptor

That is very incorrect. I have SLPs and I ported them as much as i could, TOP and BOTTOM (divider is gone, top and bottom)and lost 0 torque. It is a myth that bigger will always make lose torque on TPI engines. Doesn't happen with the runners, it does happen however with a 58mm throttle body.
Rick

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'88 GTA 350
Headers, catback, free mods, Xtreme energy cam, intake pieces and 2100 RPM TQ

13.39@102.50 MPH
1.90 Sec ------- Best 60FT
104.23 MPH -- Best Trap Speed
AIM HIGH!

IrocStan

I took the dividers on my SLP's down about 1/3-1/2 the way and felt no loss in torque what-so-ever. The engine is much happier from 4500-5500, and that is with the stock cam! The length of the stock TPI runners is excessive IMO. The added length only helps at "way low" rpm's, which you'd never notice at full throttle.

Austin

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87 IROC 350
Mods: 3:42 Torsen, pocket ported 083 heads, complete Edelbrock exhaust, Most free mods, Most little mods, aluminum d/s. Edelbrock STB, boxed rear suspension pieces, urethane bushings everywhere.
Stock cam, chip, runners, base, and trans
13.94@103mph, 2.25 60'
Recent stuff: SSM sfc's, Homemade relocation brackets, Ported SLP runners, ported base, EGR!
Current/future projects: homemade torque arm, and 27x10 Hoosiers (need wheels!), and Prom Burning
Planning new engine build, possibly 383 w/ TFS 23*

F22Raptor

Thank you IrocStang. I think the SLPs have much more flow potential than any other runnes out there. The only things that would beat a set of ported SLP runners with aftermarket base would be a SuperRam, because of a much bigger plenum and a MiniRam, because it has the shortest runners of them all.
Rick

e-man

So the SLP's with the dividers out should help the upper RPM's more than the edelbrocks.Im just a little anoyed with the cam I put in last weekend I expected a little more from it.My car feel's faster just not what I expected.Hopefully the runners will help me out.

F22Raptor

e-man, do you have a full exhaust (headers, catback and a cutout)?? If not, you won't see any benefits whatsoever

e-man

I have headers,high flow cats,and cat back.

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.01@98mph without cam

IrocStan

Your prom may need to be optimized to take full advantage of your new cam. What are the specs on your new cam?

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87 IROC 350
Mods: 3:42 Torsen, pocket ported 083 heads, complete Edelbrock exhaust, Most free mods, Most little mods, aluminum d/s. Edelbrock STB, boxed rear suspension pieces, urethane bushings everywhere.
Stock cam, chip, runners, base, and trans
13.94@103mph, 2.25 60'
Recent stuff: SSM sfc's, Homemade relocation brackets, Ported SLP runners, ported base, EGR!
Current/future projects: homemade torque arm, and 27x10 Hoosiers (need wheels!), and Prom Burning
Planning new engine build, possibly 383 w/ TFS 23*

e-man

It's a comp cam Lift.480I/.480E-210I/220E @.05 LSA112

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.01@98mph without cam

The ODB

I agree with raptor about the runners.

eman, have you tried changing your A/F ratio since the cam change? what is your O2 readings in 3rd gear at WOT?

ODB

e-man

The o2 reading was in the .900-.950 range .950 was the highest I saw.Also I got a e-mail from edelbrock they said their runners are 1.7 all the way through.And the comp-cam's RPM range in the catalog is 1200-5200.Now I think the edelbrock might be a little better for what I got.What do you think?

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89 350 TPI,comp cam,edelbrock intake base,SLP headers,highflo cats,flomaster cat back,accel 300+ ign,ported plenum and runners,ported maf,auto w/shiftkit,cold air induction,AFPR,Ed wright chip,3.23 posie best ET 14.01@98mph without cam

IrocStan

Wow, 1.7 is pretty big. If you just want to bolt on runners, the Edelbrocks will probably be better. If you want to spend time porting, I think the SLP's would be better only because you can siamese the runners and have a shorter runner length.

How much are the Edelbrocks?

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87 IROC 350
Mods: 3:42 Torsen, pocket ported 083 heads, complete Edelbrock exhaust, Most free mods, Most little mods, aluminum d/s. Edelbrock STB, boxed rear suspension pieces, urethane bushings everywhere.
Stock cam, chip, runners, base, and trans
13.94@103mph, 2.25 60'
Recent stuff: SSM sfc's, Homemade relocation brackets, Ported SLP runners, ported base, EGR!
Current/future projects: homemade torque arm, and 27x10 Hoosiers (need wheels!), and Prom Burning
Planning new engine build, possibly 383 w/ TFS 23*

e-man

Jim pace GMPP has the edelbrocks for $286.99 posted on the web site.

Yelofvr

Raptor: My comments were based upon published dyno data from two separate manufacturers, Accel and TPIS. Sounds like your comments are based on your "seat of the pants" dyno. In addition your comments are in disagreement with highly regarded technical writers such as Ray Bohacz who has published numerous articles on tuned port performance. As another point of reference, the Accel EMIC installers training manual talks about the effects of shortening the runner length on a tuned port efi system and the negative effect it has on low rpm torque production. You ought to read through it sometime.

Kyle F

Not going to touch this one thant to say SLPs runners are the best on the market for 5500rpm applications. And for god's sake guys a lot of research has gone into those dividers and they are there for a reason, and not for emissions or fuel economy. Don't remove them your engine will perform better with them after you get a 5500rpm cam and Heads to match, oh yea and dont forget the Torque converter.

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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and added a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace added. Soon to have Intrax lowering springs.
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

The Third Gen Will Never be Forgotten