I recently purchased the SLP runners from SLP. I wanted to know before I go to put them on, if they will fit directly without porting right now? They came with the gaskets and bolts. Any one have any experience with this? Just wanted to know before I go taking them off. I have an 86 IROC 305 if that matters?

P.S.- I do plan to Port everything, but a later time, when I have some $$$.... Thanks!

 

If you bought the right SLP Runners for your year car as I think there are 2 89-92 and an earlier, but as far as I know they should bolt up no problems, it will need to be port matched as nothing is perfect, but they should bolt up and flow better then stock.

my .02

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1989 Trans Am GTA, L98 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27, Dynomax muffler, K&N
1992 Camaro RS, LO3 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel, K&N - Sold

Honda engines ROCK, I have one on my lawn mower but I still have to push it.

 

Not to shatter your hope but I really doubt your car will get faster with those runners.

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1991 Firebird
350 L98 (was a 305 TBI),T-5,Edelbrock TES and cat back,Accel manifold
NOS,subframes,jegster torque arm,MSD Digital 6
AFPR,Lakewood lcas
Hurst linelock,SLP cam (206 212 .480 .486),relocated battery,cold air,Hypertech chip,centerforce df,clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
autopower rollbar

12.33 @ 114.83 juiced uncorrected

13.510 @ 102 non juiced uncorrected

 

The only reason is that my mechanic dented my stock ones on one side so he is eating the cost. I know for now I wont feel probably any difference. I was so pissed because I couldnt find stock ones that were not dented like mine! Well thanks anyways...

 

You will notice better breathing, IE upper RPM won't feel so lame. but no major 100hp increase like a type R sticker

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1989 Trans Am GTA, L98 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27, Dynomax muffler, K&N
1992 Camaro RS, LO3 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel, K&N - Sold

Honda engines ROCK, I have one on my lawn mower but I still have to push it.

 

ok, if i fully portteb the stock base plate, SLP runners and plenum, on my 305 with a L98 cam and ported 305 heads how much extra RPM will i produce power too? some where in the low 5000 RPMS, 5200?

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1987 Black 305 TPI 5spd IROC, seems to be fully loaded, but can't find RPO codes.

AIM: SzkiRM125
F-bodies : The last with-standing defense against the Invasion.

 

i have a set of stock runners, perfect condition if you want to trade for the SLPs.

 

Hahaha! I cant belive you made him that offer!!

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1991 Z28

 

GofasterFirebird
why do you say that?


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1991 Z28 ZZ4 with LPE superram base, SLP runners, LPE 58mm T-body,Random Technology ramair,TES headers,24#svo injectors,ZEX nitrous,Walbro 255lph f-pump,Accel AFPR,Random Technology catback,!cats,and mutch more.

 

the TPI system was more designed for 305's and is more restrictive on the 350 (same system i think). therefore you will notice a larger gain using them on 350's. Just like adding a K&N filter on a stock car does almost nothing vs. a stock filter. While a K&N on a supercharged engine vs. a stock filter makes a BIG difference. But hey, i would think it would help some, might wanna follow it up with some 1 5/8 headers.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

Having installed a set of these to my 91 GTA with a 350 - 700R4, I can tell you from experience that they made the engine pull much harder above 3grand. The only other mods at that time were Cold Air Intake, Ported Plenum (slightly matched to the runners, but mostly with the EGR ridge removed) Jacobs ignition, AFPR and Strut Tower Brace