If I port my Pleneum and get SLP runners but dont get an after market manifold will it be worth it or should I wait till I get the manifold?(which will be a while)

 

You could always port the stock manifold. Otherwise i would wait till you get the manifold done. It will be the bottleneck till its replaced or opened up.
But if you do the runners and plenum first anyway, you should see some improvement.
As long as you plan do get them all done someday, order isn't really important, just realize the stock base is very restrictive and will hinder performance of better runners and plenum.

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White '88 RS (originally 2.8)
Previous engine-350, .040 over, vette alum. L98s, stock tpi, stock 305 injectors & chip. TES headers & edelbrock cat back. 3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 357-13.7@101mph
on a 2.050 60 ft.
(Damn the 2.8!)
New Setup:
4 bolt 357 (10.2:1), AFR 190s (fully cnc ported), LT4 Hot cam (1.6 RRs), Ported SuperRam (upper&lower), Ed Wright custom chip, 24# Accel injectors, Yank 3200 lock-up TC, 3.27 9 bolt rear, some traction! Hoping to see some 12s.


[This message has been edited by '87FAKE-IROC-Z (edited December 06, 2001).]

 

They gave me an extra 500 rpm with stock manifold.

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91 Formula WS6
Home Made Ram Air,K&N Air Filter,Air Foil,
Ported Plenum,Underdrive Crank Pulley, Crane AFPR, Edelbrock High Flow TPI Runers, Holley 19lb Fuel Injectors, TB Bypass, Corvette Servo, SLP Headers, SLP Y Pipe & Complete SLP 3" Exhaust and Muffler, High Flow Cat, Mobil 1 Oil, Hotchkis STB, Spohn LCA's and Panhard Bar, Spohn SFC's and other polyurethane goodies, Dynoed 208 rwhp, best 1/4 15.4 @ 89 mph

Http://www.geocities.com/91formula

 

Thanks for the help. I think I will go ahead and do it and I do plan on getting a new base but thats when I get a cam.