Runners & Plenum Question
Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Runners & Plenum Question
Hi Guys, need alittle help. I bought a used set of Runners and plenum off a guy here on the forum( I want to polish them and do some minor porting). Anyhow its looks like they're from an 88 or 89(not sure). I've got an 87 with a cold start valve. On mine each runner has the 4 intake tubes and another smaller tube(I don't know what it called) The right has a provision for the cold start valve.
The new right side runner matches up perfectly, the left side does NOT have that 5th smaller tube and the plenum has no provision for it, can I still use this new setup? The manifold hole(left side) will be covered by the runner.
Any thoughts? Any problems?
The new right side runner matches up perfectly, the left side does NOT have that 5th smaller tube and the plenum has no provision for it, can I still use this new setup? The manifold hole(left side) will be covered by the runner.
Any thoughts? Any problems?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Runners & Plenum Question (OleDog)
The cold-start injector remained through '88 so you must have an '89-'91 setup.
To use those runners you will need to install a chip from an '89 so that the ECM will do the enrichment on a cold start; and you must block off the port at the left rear of the ruel rail when you remove the 9th injector.
However check the plenum; if it doesn't have the triangle between the two TB interface holes on the front you will need to upgrade to a later model TB as well.
You realy need an intake setup from an '87-'88 TPI, either F-body or Y-body to minimize the hassles. You could either sell the used parts or use them to practice, though that's not realy necessary for intake porting.
To use those runners you will need to install a chip from an '89 so that the ECM will do the enrichment on a cold start; and you must block off the port at the left rear of the ruel rail when you remove the 9th injector.
However check the plenum; if it doesn't have the triangle between the two TB interface holes on the front you will need to upgrade to a later model TB as well.
You realy need an intake setup from an '87-'88 TPI, either F-body or Y-body to minimize the hassles. You could either sell the used parts or use them to practice, though that's not realy necessary for intake porting.
Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Re: Runners & Plenum Question (65Z01)
All the parts are stock setup parts.
Just to clarify.
Both sets have a cold start.
The only difference is the left side, my has the fifth smaller tube the newer set(probably from an 89) does not have the fifth tube.
So back to my question? I know it'll fit just want to know if the left runner blocking off the the intake will cause me any problems
[Modified by OleDog, 3:53 PM 5/22/2003]
Just to clarify.
Both sets have a cold start.
The only difference is the left side, my has the fifth smaller tube the newer set(probably from an 89) does not have the fifth tube.
So back to my question? I know it'll fit just want to know if the left runner blocking off the the intake will cause me any problems
[Modified by OleDog, 3:53 PM 5/22/2003]
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Re: Runners & Plenum Question (OleDog)
I've probably got an extra set. I can swap you the ones you had IF they are stock runners.
But if you bought some more thye are probably aftermarket, right?
But if you bought some more thye are probably aftermarket, right?
Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Re: (War Machine)
Okay so on my car I have 2 EGR tubes one left and one right. Onthe new runners I have the tube only on one side. the plenum has cutouts for only one EGR tube. So that's perfect except now I have to block off the extra fifth
tube on the manifold, which the runner will do.
So I still have an egr tube, runners and plenum work together, Cold start valve is there. My question is Does anybody forsee any problems in covering the EGR hole on the manifold(which the runner will do without any modification to anything.)
You guys take off your runners more often than the ole lady does her nails somebodies gotta have a clue. :crazy:
tube on the manifold, which the runner will do.
So I still have an egr tube, runners and plenum work together, Cold start valve is there. My question is Does anybody forsee any problems in covering the EGR hole on the manifold(which the runner will do without any modification to anything.)
You guys take off your runners more often than the ole lady does her nails somebodies gotta have a clue. :crazy:
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: (OleDog)
No no no, you've got it all wrong.
The passenger side skinny tube is for EGR. The driver's side skinny tube is for the fuel vapor canister purge AND the PCV suction line.
The passenger side skinny tube is for EGR. The driver's side skinny tube is for the fuel vapor canister purge AND the PCV suction line.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Pro
Joined: Jul 2001
Posts: 557
Likes: 0
From: Taxahoma
Re: (CentralCoaster)
I'm doing a superram install and from what it says it has egr capability and the only hole that is open is on the drivers side, from looking at the intake it seems that both sides go to the egr. That is if your talking about the little skinny tube that's part of the runners.