OK, I'm building a L98 for my '91 GTA. It will have a ZZ4 cam/springs, Edelbrock headers, Holley AFPR, ported plenum, gasket matched TPI, 3" exhaust, K&N, coil, wires, and all the basic stuff. I'm also planning on a 6-speed and 4.10's. Right now there is a GP for like $300 for the intake... should I buy it? I've heard its the biggest restriction in a TPI. Will this help me alot, or should I just save for my 6-spd project? Thanks for any help. L8R

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'91 GTA:
www.fbody.com/members/91WS6GTA

 

YES, you should for sure purchase the Accel base, its one of the very best, and its over $200 less with our current GP. The base is a much bigger restriction than are the plenum or runners. I am trying to convince my parents to lend me $300 so I can buy one!

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 Hot Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

7.5" 10 Bolt with 3.42s soon to come!

 

Next you need to ditch those wimpy Edelbrock headers for some 1 3/4" SLP's!

(Not you Dan, the other guy)


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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=-

 

I'll see what I can afford.

Kevin- Those wimpy headers were FREE! They came with the wrecked car I bought. They have to be better than manifold?!?! I don't have $400 to spend on headers right now either. Oh well. Later guys

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'91 GTA:
www.fbody.com/members/91WS6GTA

 

HEY, Dan has the SAME headers too!

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'91 GTA:
www.fbody.com/members/91WS6GTA

 

Actually, the runners do pose a bigger restriction than the base. Here are the flow numbers:
stock runners: 202cfm
stock base manifold 222 cfm

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Dave Zelinka

 

The edelbrock's r a much better header than SLP. Yeah right u say, Ok for example lets take an edelbrock system which runs for about 299.00 in summit port the internals yourself, all together around 325.00. On the other hand SLP headers run about 450.00, Oh yeah SLP's tend to leak. Go for the edelbrock. Trust me i know plenty of people that went from SLP to edelbrock.

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92' camaro
New 305 block TPI conversion, Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system.
Soon to come!!!
Procharger system 12lbs o boost.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

I think the better bang for the buck are far as 1 5/8" headers go are Edelbrocks. There's a large difference in price, not much (if any) in quality. If you're running a hot 350 like most are, then I'd say go for the SLP's. They offer them in 1 3/4" as well as 1 5/8". Edelbrocks are 1 5/8" only. Both are good quality, it just depends on who needs what. I'm considering SLP's for my 355 (I think there's a GP for them for like $125 off!).

 

I'm not even gonna get into this arguement again, other than to say Dan is running Edelbrock headers because he's at high altitude, he cant use the extra breathing from larger headers.

SLP headers ARE better than Edelbrocks. Plenty of people have switched to them as well. Yah Edelbrocks are cheaper, but thats right, they're cheap. You get what you pay for.

Getting back on topic, GTA91, if you can afford the intake manifold, go for it. If you'd rather save for a T56, then you can port-match your stock intake cheaply.

 

I know several people around me with eldb. headers and they hate them I on the other hand have had my slp 1 3/4 headers since 1996 and love them. I would never go to a cheep header like those. they have thinner flanges(makes them wan't to leak). second why in the world would you put a none heated o2 so far a way from the header?

 

I want to get in on the Group Purchase for the intake!!!
How can I?

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Gunmetal 89GTA T-Tops L98
700R4 with 3.27 gears, street tires
Best 60 ft: 1.996
Best 1/8th mile: 9.02 @ 76.5mph with 60' time of 2.14
Mods: air filter, hypertech chip, 3" exhaust
Current Mods: 8.8wires, cap, rotor, +4 plugs, MAF screens
Servo

 

I would..I paid almost 500.00 for mine last year. IMO its the best one!

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

 

There's a thread on the group purchase in this forum, and you can also check the group purchase forum itself.

 

What type of heads and cam would work best with the Accel base and runners? What about if I get the Super ram instead of runners with the accel base?

I'm getting the base in the Group Purchase.
I was thinking of getting AFR 190's, a ZZ4, or possibly just a ported Vette L98 Alum. head. Which would work best with the base and runners, or which would work best with the base and superram?

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Gunmetal 89GTA T-Tops L98
700R4 with 3.27 gears, street tires
Best 60 ft: 1.996
Best 1/8th mile: 9.02 @ 76.5mph with 60' time of 2.14
Mods: air filter, hypertech chip, 3" exhaust
Current Mods: 8.8wires, cap, rotor, +4 plugs, MAF screens
Servo