AFR Heads. Exhaust rocker geometry?
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Joined: Jan 2002
Posts: 12
From: Memphis,TN.
AFR Heads. Exhaust rocker geometry?
I'm working on a '94 Camaro for my s/o and have put AFR heads and an LT4 intake on the engine. I was unable to get the car running properly and the car is in a shop.
They were about to adjust the rockers when they noticed that several rockers do not line up as they should. It seems as if the exhaust rockers are the ones mainly affected. I spent a lot of time getting them aligned (and thought they were).
My question is should I try aftermarket guide plates, or is there another solution such as offset rockers?
I need to get this car going soon and any help is greatly appreciated.
They were about to adjust the rockers when they noticed that several rockers do not line up as they should. It seems as if the exhaust rockers are the ones mainly affected. I spent a lot of time getting them aligned (and thought they were).
My question is should I try aftermarket guide plates, or is there another solution such as offset rockers?
I need to get this car going soon and any help is greatly appreciated.
Thread Starter
Registered User
Joined: Jan 2002
Posts: 12
From: Memphis,TN.
Re: AFR Heads. Exhaust rocker geometry?
According to AFR only the AFR guides should be used. Then why the heck can't I get them to align properly?
The car runs terribly and I just saw the note regarding the use of a sealant on the rocker studs! Could this explain extremely poor porformance of the engine? It runs WAY too rich.
9) GUIDE PLATES:
USE ONLY THE GUIDE PLATES SUPPLIED BY AIRFLOW
RESEARCH! Push rod guide plates are furnished with each set of AFR aluminum heads and installed correctly as shipped. Studs should be torqued to 60 ft/lbs. Silicone sealer is recommended on applications where the stud hole intersects the intake port. The 190, 195, & 210 heads require the long slot of the guide plate to straddle the exhaust push rod. The 220 & 227 heads require the long slot to straddle the intake pushrod. For proper alignment of the rocker arm over the center of the valve, simply loosen the rocker studs and shift the guide plate back and forth until proper alignment is achieved, then torque to 60 ft/lbs.
USE ONLY THE GUIDE PLATES SUPPLIED BY AIRFLOW
RESEARCH! Push rod guide plates are furnished with each set of AFR aluminum heads and installed correctly as shipped. Studs should be torqued to 60 ft/lbs. Silicone sealer is recommended on applications where the stud hole intersects the intake port. The 190, 195, & 210 heads require the long slot of the guide plate to straddle the exhaust push rod. The 220 & 227 heads require the long slot to straddle the intake pushrod. For proper alignment of the rocker arm over the center of the valve, simply loosen the rocker studs and shift the guide plate back and forth until proper alignment is achieved, then torque to 60 ft/lbs.
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Joined: May 2003
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From: LA (lower Alabama)
Re: AFR Heads. Exhaust rocker geometry?
If it's sucking air by the studs it is a vacuum leak.
The running rich could be ya need a tune on the computer.
What cam? Has it had a computer tune?
If it has a vacuum leak the O2's will show it lean and richen it up to spect=more fuel, which may be your problem.
I use pipe thread sealant.
The running rich could be ya need a tune on the computer.
What cam? Has it had a computer tune?
If it has a vacuum leak the O2's will show it lean and richen it up to spect=more fuel, which may be your problem.
I use pipe thread sealant.
Thread Starter
Registered User
Joined: Jan 2002
Posts: 12
From: Memphis,TN.
Re: AFR Heads. Exhaust rocker geometry?
I got the car as a rolling chasis. I have no idea what kind of tune is in the car, if any. I suspect the cam to be stock but again I am unsure of that too. The engine came out of a rollover and I put the heads and LT4 intake on it. It appears to have non-stock injectors and that is surely contributing to the rich problem.
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