Giving up on single plane, whats a good dual plane?
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Car: 1992 Firebird
Engine: 350TBI
Transmission: 700r4
Axle/Gears: Ford 9in 4.10
Giving up on single plane, whats a good dual plane?
I have a Weiand Xcellerator single plane intake, and its just annoying..... It likes to cause backfiring at higher rpms and an idle thats giving me nightmares. None of these issues I had when I had the Edelbrock 3704. The shop I go too said that the single plane is just too much for my 305.
Here are some dual planes I was looking at. I have no EGR and aluminum 113 corvette heads.
http://store.summitracing.com/partde...1&autoview=sku
http://store.summitracing.com/partde...4&autoview=sku
Either of those good? Or any other opinions on what to get.
Here are some dual planes I was looking at. I have no EGR and aluminum 113 corvette heads.
http://store.summitracing.com/partde...1&autoview=sku
http://store.summitracing.com/partde...4&autoview=sku
Either of those good? Or any other opinions on what to get.
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Re: Giving up on single plane, whats a good dual plane?
Currently running the Performer RPM with the square flange. The plenum divider is cut down. Really runs decent.
With large TBI units (2" bores) the spread bore flange is most likely better. I bought this manifold way back when still running a carb. I had to grind the sides the plenum/mounting flange to get the wide TBI bores to smoothly flow into the plenum.
Also running '113 heads, I run coolant through the crossover. Drilled/tapped 1/8" NPT into the crossover near the heads area. Using fittings and 3/8" hose allow coolant to circulate under the plenum.
This improves driveability. The setup also draws cold air from the cowl area. So a little heat under the plenum helps.
RBob.
With large TBI units (2" bores) the spread bore flange is most likely better. I bought this manifold way back when still running a carb. I had to grind the sides the plenum/mounting flange to get the wide TBI bores to smoothly flow into the plenum.
Also running '113 heads, I run coolant through the crossover. Drilled/tapped 1/8" NPT into the crossover near the heads area. Using fittings and 3/8" hose allow coolant to circulate under the plenum.
This improves driveability. The setup also draws cold air from the cowl area. So a little heat under the plenum helps.
RBob.
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Car: 1992 Firebird
Engine: 350TBI
Transmission: 700r4
Axle/Gears: Ford 9in 4.10
Re: Giving up on single plane, whats a good dual plane?
Kinda confused about the coolant crossover? I thought that coolant already flowed through the center crossover?
Im justing using the stock 305 throttle body, and I have an adapter plate. Ill check fitment with whatever intake I get and grind anything that gets in the way.
So you think the Edelbrock 7101 Performer RPM is the way I should go?
Im justing using the stock 305 throttle body, and I have an adapter plate. Ill check fitment with whatever intake I get and grind anything that gets in the way.
So you think the Edelbrock 7101 Performer RPM is the way I should go?
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Car: '86 Iroc-z
Engine: 385 stroker, vortecs, demon 750
Transmission: G-Force T-5
Axle/Gears: 9-bolt, 3.27s
Re: Giving up on single plane, whats a good dual plane?
Get a Edelbrock Performer RPM Air-Gap, since their debut i have heard nothing but good things about them. Out of every manifold comparison i have seen the Air-Gap whoops that ***. Hot Rod compared it to many intakes and the Air-Gap did the best. Even with peak power it almost did as good as a Victor manifold, but had way better bottom end than a Victor. Unless you have a full race application an Air-Gap is the best choice in my opinion as with many others.
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Car: 1992 Firebird
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Re: Giving up on single plane, whats a good dual plane?
Get a Edelbrock Performer RPM Air-Gap, since their debut i have heard nothing but good things about them. Out of every manifold comparison i have seen the Air-Gap whoops that ***. Hot Rod compared it to many intakes and the Air-Gap did the best. Even with peak power it almost did as good as a Victor manifold, but had way better bottom end than a Victor. Unless you have a full race application an Air-Gap is the best choice in my opinion as with many others.
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Car: '86 Iroc-z
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Car: 91 Trans am
Engine: built 360 TBI
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Re: Giving up on single plane, whats a good dual plane?
Would be interesting, how your 3704 would perform with 2"bores and a nice crossflow grinded between the 2 bores. The plenum size and the runners look wery similar on the other Edelbrock manifolds.
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Re: Giving up on single plane, whats a good dual plane?
This makes it easy to run some coolant through there.
Note that this coolant improves driveability greatly. And is not possible with an air-gap style intake manifold.
RBob.
#9
Re: Giving up on single plane, whats a good dual plane?
Originally Posted by Timothayyy
Kinda confused about the coolant crossover? I thought that coolant already flowed through the center crossover? Im justing using the stock 305 throttle body, and I have an adapter plate. Ill check fitment with whatever intake I get and grind anything that gets in the way. So you think the Edelbrock 7101 Performer RPM is the way I should go....?
#10
Re: Giving up on single plane, whats a good dual plane?
I used to run a Holley street dominator intake on both my Chevelle street car and my 87 Camaro race car and the holley intake peformed better that the performer rpm ever did. I never tried the performer rpm airgap, but i know that the street dominater had better intake ports and was 1" taller than the performer rpm and would pull to 7000 rpm's. My car ran very high 11's with a .040" over 350, .515" cam, unported 186 heads, 4 barrel carb full length 1 5/8" primary tube headers, 4.10 gears, manual shift th350 tranny w/3500 stall and 28"x10.5" slicks. The engine I'm currently building for my truck is going to be using a fully ported Performer Rpm Intake with tbi adapter till I can get another street dominator. A friend of mine owns a cylinder head shop and he has told me on several ocasions that edelbrock stuff is good but you have to alot of work to it to make them as good as they can be.
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Re: Giving up on single plane, whats a good dual plane?
I have an RPM Performer if you need one, you would just need to elongate the center bolt holes though (it's for '86 heads and down). I'm switching to a single plane for my TBI, but then again I'm also switching to port injection, but keeping the stock LO3 throttle body....
RBob.
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Re: Giving up on single plane, whats a good dual plane?
I used to run a Holley street dominator intake on both my Chevelle street car and my 87 Camaro race car and the holley intake peformed better that the performer rpm ever did. I never tried the performer rpm airgap, but i know that the street dominater had better intake ports and was 1" taller than the performer rpm and would pull to 7000 rpm's. My car ran very high 11's with a .040" over 350, .515" cam, unported 186 heads, 4 barrel carb full length 1 5/8" primary tube headers, 4.10 gears, manual shift th350 tranny w/3500 stall and 28"x10.5" slicks. The engine I'm currently building for my truck is going to be using a fully ported Performer Rpm Intake with tbi adapter till I can get another street dominator. A friend of mine owns a cylinder head shop and he has told me on several ocasions that edelbrock stuff is good but you have to alot of work to it to make them as good as they can be.
RBob.
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Re: Giving up on single plane, whats a good dual plane?
On carb manifolds the crossover gets exhaust gases. The exhaust comes from the heat-riser (now EGR) passages in the heads. The '113 heads do not have these passages. It is a flat mounting area to block off the crossover on the intakes.
This makes it easy to run some coolant through there.
Note that this coolant improves driveability greatly. And is not possible with an air-gap style intake manifold.
RBob.
This makes it easy to run some coolant through there.
Note that this coolant improves driveability greatly. And is not possible with an air-gap style intake manifold.
RBob.
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Car: 1992 Firebird
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Axle/Gears: Ford 9in 4.10
Re: Giving up on single plane, whats a good dual plane?
I have an RPM Performer if you need one, you would just need to elongate the center bolt holes though (it's for '86 heads and down). I'm switching to a single plane for my TBI, but then again I'm also switching to port injection, but keeping the stock LO3 throttle body....
Otherwise I woulda just gotten it from you.
#16
Re: Giving up on single plane, whats a good dual plane?
Originally Posted by RBob
No need to elongate the center four holes to bolt it to '113 heads....
Originally Posted by RBob
I ordered it already yesterday. Otherwise I woulda just gotten it from you.
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Re: Giving up on single plane, whats a good dual plane?
OK, we have pictures. The drivers side pic shows the feed from the thermostat crossover water passage. This side feeds into the intake manifold crossover.
Then a close up of the passenger side fitting in the intake crossover.
The last picture shows the return plumbed into the heater return line.
The hose is common 3/8" fuel line. The fittings are from a home box store.
The T fitting in the heater hose is aluminum. Made from some tubing using the aluma-weld rod and a propane torch.
RBob.
Then a close up of the passenger side fitting in the intake crossover.
The last picture shows the return plumbed into the heater return line.
The hose is common 3/8" fuel line. The fittings are from a home box store.
The T fitting in the heater hose is aluminum. Made from some tubing using the aluma-weld rod and a propane torch.
RBob.
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Re: Giving up on single plane, whats a good dual plane?
OK, we have pictures. The drivers side pic shows the feed from the thermostat crossover water passage. This side feeds into the intake manifold crossover.
Then a close up of the passenger side fitting in the intake crossover.
The last picture shows the return plumbed into the heater return line.
The hose is common 3/8" fuel line. The fittings are from a home box store.
The T fitting in the heater hose is aluminum. Made from some tubing using the aluma-weld rod and a propane torch.
RBob.
Then a close up of the passenger side fitting in the intake crossover.
The last picture shows the return plumbed into the heater return line.
The hose is common 3/8" fuel line. The fittings are from a home box store.
The T fitting in the heater hose is aluminum. Made from some tubing using the aluma-weld rod and a propane torch.
RBob.
So I connect the thermostat crossover to one side of the center passage. Then hook the end coming out the other side of the center passage to the heater hose?
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Re: Giving up on single plane, whats a good dual plane?
Could also feed the water from a head opening at the rear of the engine. With it returning to the thermostat crossover. That is more along the lines of how GM did it with the TBI intakes.
RBob.
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Car: Trans am
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Re: Giving up on single plane, whats a good dual plane?
sorry about hijacking this for a second my new intake doesnt have the crosover in the back or the center. Im not shure what to do about that it does have wholes in the back should i just rount it stright across to the other side? And do i have to make a air crossover if im using the dual plane intake and tbi?
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