PORTING MANIFOLD AND RUNNERS
Thread Starter
Racer
Joined: May 2000
Posts: 411
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From: Krakow
PORTING MANIFOLD AND RUNNERS
Hi
I have 1988 35 th anniversary automatic.
I know, problem was there many times but I must asking about it.
My friend has camaro 5.0 TPI (1988). He changed engine to carburator so intake from TPI is free.
I have no EGR now, cause I plugged pipe that comes from exhaust manifold to manifold on my vette. So EGR is no problem. My questions are:
1. Is that plenum, runners and base from camaro 302 CID TPI will fit on my vette? Camaro has iron heads I have aluminum, 302 CID vs 350 CID, (I will replace fuel lines and injectors from my car).
2. Is there something in porting runners and manifold (I have no bigger runners I planning use stock runners)? Plenum is ported.
3. Is that porting worth doing? Will I see any measurable benefits worth doing that all big effort?
4. When I go so deep, is there anything I can do with my heads, or only do manifold?
Thanks,
Jerry, Poland
I have 1988 35 th anniversary automatic.
I know, problem was there many times but I must asking about it.
My friend has camaro 5.0 TPI (1988). He changed engine to carburator so intake from TPI is free.
I have no EGR now, cause I plugged pipe that comes from exhaust manifold to manifold on my vette. So EGR is no problem. My questions are:
1. Is that plenum, runners and base from camaro 302 CID TPI will fit on my vette? Camaro has iron heads I have aluminum, 302 CID vs 350 CID, (I will replace fuel lines and injectors from my car).
2. Is there something in porting runners and manifold (I have no bigger runners I planning use stock runners)? Plenum is ported.
3. Is that porting worth doing? Will I see any measurable benefits worth doing that all big effort?
4. When I go so deep, is there anything I can do with my heads, or only do manifold?
Thanks,
Jerry, Poland
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Re: PORTING MANIFOLD AND RUNNERS (jtjerry)
Jt,
For future information, the camaro is a 305,not a 302.
:)
And is there a reason you want to use the camaro TPI? IS it stock or is it larger tube runners and larger intake on the camaro?
If its stock dont bother, theres nothing better then his TPI then what you have.
Theyre all pretty much the same thing.
You also cant use the fuel rails from the camaro because the Corvette fuel lines from under the car wont match up...the corvette fuel rail line comes straight off the intake while the camaro fuel rail line turns to the side of the engine.
You would have to add some kind of adaptor hoses.
As far as porting goes, Im not sure what youre asking.Porting is OK but wont see any big gains...were you speaking of porting the base manifold? Or the plenum only?
I wasnt too sure what you were asking so I answered the best I could.
Hope this helps some.
:)
For future information, the camaro is a 305,not a 302.
:)
And is there a reason you want to use the camaro TPI? IS it stock or is it larger tube runners and larger intake on the camaro?
If its stock dont bother, theres nothing better then his TPI then what you have.
Theyre all pretty much the same thing.
You also cant use the fuel rails from the camaro because the Corvette fuel lines from under the car wont match up...the corvette fuel rail line comes straight off the intake while the camaro fuel rail line turns to the side of the engine.
You would have to add some kind of adaptor hoses.
As far as porting goes, Im not sure what youre asking.Porting is OK but wont see any big gains...were you speaking of porting the base manifold? Or the plenum only?
I wasnt too sure what you were asking so I answered the best I could.
Hope this helps some.
:)
Thread Starter
Racer
Joined: May 2000
Posts: 411
Likes: 0
From: Krakow
Re: PORTING MANIFOLD AND RUNNERS (Bill's86Coupe)
Hi Bill,
I want try porting camaro manifold, runners and plenum, cause they are not on car (my friend has carburetor now so he has manifold, runners and plenum left and he can give it to me)
After I planing make some porting on plenum, (I rather know what to do on plenum: step after throttle body, gasket to plenum ...) runners (is there something to do?) runners to manifold (is there something to porting?) and manifold to heads (is there something to porting?). Even if I ruin or broke something I risk nothing. My Intake is still in my car.
And after porting I will take off my original plenum, runners and manifold from my corvette and replace that ported plenum, runners and manifold into my corvette.
So before anything I make I must be sure that it will fit directly in my vette. I know that injectors are different (19lbs/22 lbs) so I think about change all fuel rails from my car, not use camaro fuel rails.
And another question (MOST IMPORTANT QUESTION) is that hard work make any reasonable power increase?
Or I see nothing big at all
Jerry
Sorry for my English
Thanks,
Jerry, Poland
I want try porting camaro manifold, runners and plenum, cause they are not on car (my friend has carburetor now so he has manifold, runners and plenum left and he can give it to me)
After I planing make some porting on plenum, (I rather know what to do on plenum: step after throttle body, gasket to plenum ...) runners (is there something to do?) runners to manifold (is there something to porting?) and manifold to heads (is there something to porting?). Even if I ruin or broke something I risk nothing. My Intake is still in my car.
And after porting I will take off my original plenum, runners and manifold from my corvette and replace that ported plenum, runners and manifold into my corvette.
So before anything I make I must be sure that it will fit directly in my vette. I know that injectors are different (19lbs/22 lbs) so I think about change all fuel rails from my car, not use camaro fuel rails.
And another question (MOST IMPORTANT QUESTION) is that hard work make any reasonable power increase?
Or I see nothing big at all
Jerry
Sorry for my English
Thanks,
Jerry, Poland
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Re: PORTING MANIFOLD AND RUNNERS (jtjerry)
It is worth your time to port the Camaro TPI intake and plenium and then use it on the Vette but you will have to modify the intake to make it fit. The Camaro intake center bolts are angled differently then the Vette bolts. You will have to slot out the center bolts on the intake to make them fit your Vette heads. All 1987 and latter TPI Camaro's and Firebirds have the 72 Degree angled middle bolts.
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Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Re: PORTING MANIFOLD AND RUNNERS (bjankuski)
Hi Jerry,
Your english is better then many americans...youre doing fine!
:)
Bjankuski gave some good advice,and thats to check the bolt angles on the camaro intake.
Also I think your Vette intake has a rear water crossover passage at the back and the camaro intake does not.
Not really a problem though.
I would agree porting another manifold and try to gasket match the ports and remove casting flash would be the way to practice.
Its very easy to make mistakes the first time.
Also, to port the plenum, I think KYVette90 here on the forum made a post with some pictures to look at not too long ago..you can check his listings for that thread.
If I see it, I will post it for you later.
Honestly, I dont see much powergains by porting the plenum and base on a stock motor.If you did not know, GM designed the TPI for the 305 5.0 engine, not the 350.
But last minute reasons, they decide to use it on the 350 and while it works fine for most driving,it doesnt let the 350 make the most HP it can.Thats why you see alot of guys install a larger intake base, and the Super Ram or the mini-ram manifolds.
They were designed for the 350 and larger motors.
However,some porting may be fine...nthing to lose really...lotsa work...you can always try it and see if it make your motor pick up any power.
:)
Your english is better then many americans...youre doing fine!
:)
Bjankuski gave some good advice,and thats to check the bolt angles on the camaro intake.
Also I think your Vette intake has a rear water crossover passage at the back and the camaro intake does not.
Not really a problem though.
I would agree porting another manifold and try to gasket match the ports and remove casting flash would be the way to practice.
Its very easy to make mistakes the first time.
Also, to port the plenum, I think KYVette90 here on the forum made a post with some pictures to look at not too long ago..you can check his listings for that thread.
If I see it, I will post it for you later.
Honestly, I dont see much powergains by porting the plenum and base on a stock motor.If you did not know, GM designed the TPI for the 305 5.0 engine, not the 350.
But last minute reasons, they decide to use it on the 350 and while it works fine for most driving,it doesnt let the 350 make the most HP it can.Thats why you see alot of guys install a larger intake base, and the Super Ram or the mini-ram manifolds.
They were designed for the 350 and larger motors.
However,some porting may be fine...nthing to lose really...lotsa work...you can always try it and see if it make your motor pick up any power.
:)
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