6 Bolt AFR heads
Thread Starter
TECH Junkie
iTrader: (3)
Joined: May 2003
Posts: 3,898
Likes: 6
From: Clayton, North Carolina
I think I am going to put all the bolts in, then weld the heads on, then add the ratchet straps around everything. Then the crank will hit the pavement!!!
Kurt
Kurt
Originally Posted by 427
I think I am going to put all the bolts in, then weld the heads on, then add the ratchet straps around everything. Then the crank will hit the pavement!!!
Kurt
Kurt
I don't want that
Hey, get off the intraweb and find my dry sump tank!! I don't know who you got doing the welding on those heads but it looks like crap. I take it this setup will be in Whitey's car this season? 
I don't know who you got doing the welding on those heads but it looks like crap. I take it this setup will be in Whitey's car this season? Ive thought about just welding an extra tab like that to my block and heads (not the internal one) then drill and thread a bolt in there for alittle extra clamping force
something i could do myself with the engine out and wouldnt cost to much.
do you think that would help just having the extra outside bolt?
something i could do myself with the engine out and wouldnt cost to much.
do you think that would help just having the extra outside bolt?
Originally Posted by 427
I think I am going to put all the bolts in, then weld the heads on, then add the ratchet straps around everything. Then the crank will hit the pavement!!!
Kurt
Kurt
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TECH Junkie
iTrader: (3)
Joined: May 2003
Posts: 3,898
Likes: 6
From: Clayton, North Carolina
Tiago, your no fun!
Steve, The tank part number was wrong, I got my guys on it.
Smokin, Any head clamping you could add would help. Not sure that the six bolt will be the cure all, but it should push us on to a new problem, and that will be refreshing.
Stevieturbo, Not sure what a wills ring is??
KP, You are always thinking! Thats what I like about you.
Kurt
Steve, The tank part number was wrong, I got my guys on it.
Smokin, Any head clamping you could add would help. Not sure that the six bolt will be the cure all, but it should push us on to a new problem, and that will be refreshing.
Stevieturbo, Not sure what a wills ring is??
KP, You are always thinking! Thats what I like about you.
Kurt
Originally Posted by 427
Tiago, your no fun!
Steve, The tank part number was wrong, I got my guys on it.
Smokin, Any head clamping you could add would help. Not sure that the six bolt will be the cure all, but it should push us on to a new problem, and that will be refreshing.
Stevieturbo, Not sure what a wills ring is??
KP, You are always thinking! Thats what I like about you.
Kurt
Steve, The tank part number was wrong, I got my guys on it.
Smokin, Any head clamping you could add would help. Not sure that the six bolt will be the cure all, but it should push us on to a new problem, and that will be refreshing.
Stevieturbo, Not sure what a wills ring is??
KP, You are always thinking! Thats what I like about you.
Kurt
I can't take it. PM me a price on a LSx rotating with ET heads.
Thanks!
Thread Starter
TECH Junkie
iTrader: (3)
Joined: May 2003
Posts: 3,898
Likes: 6
From: Clayton, North Carolina
Update. The heads are now machined flat, a few pics included.
I also took a picture with the mylar gasket print laid on top of the head so you can see the bolt locations. After they are machined I will remove some of the excess material on the outside boss.
Kurt
I also took a picture with the mylar gasket print laid on top of the head so you can see the bolt locations. After they are machined I will remove some of the excess material on the outside boss.
Kurt
Kurt,
With the time you have into those heads do you think it would just be cheaper to sell the heads people have now and buy a set of 6 Bolt heads??
When will GMPP 6 Bolt heads be ready??? Or are they already??? Am i missing something???
Kyle
With the time you have into those heads do you think it would just be cheaper to sell the heads people have now and buy a set of 6 Bolt heads??
When will GMPP 6 Bolt heads be ready??? Or are they already??? Am i missing something???
Kyle
I hate to be the bearer of sobering news but IMO you just made issues for yourself more than helped yourself out.
Consider the heat treat in the head deck to be now gone....instead of a rock hard deck pressing on the fire ring to seal the combustion pressure the fire ring of the gasket will now sink into the head deck (because its soft) reducing the pressure around the ring itself creating a situation that could cause a loss of cylinder pressure past the gasket and possibly into your cooling system (water jackets).
The standard 4 bolt design with our thick .750 head deck, the proper gasket and good fasteners in an engine tuned right (no detonation and high cylinder pressure spikes) could reliably make into the four digits without an issue.
To properly heat treat the head again would be costly and I believe you would have to remove all the seats and guides.
Im curious how this deal pans out and the work you did is innovative, but I would get some other opinions concerning the heat treat which with all that welding and the heat it generates is certain to have been compromised. Aluminun heads will only be effective if the aluminum has the proper rockwell....otherwise you will be chasing issues with them for a very long time.
Feel free to call me at AFR if you like next week....
Regards,
Tony
(661)257-8124
Consider the heat treat in the head deck to be now gone....instead of a rock hard deck pressing on the fire ring to seal the combustion pressure the fire ring of the gasket will now sink into the head deck (because its soft) reducing the pressure around the ring itself creating a situation that could cause a loss of cylinder pressure past the gasket and possibly into your cooling system (water jackets).
The standard 4 bolt design with our thick .750 head deck, the proper gasket and good fasteners in an engine tuned right (no detonation and high cylinder pressure spikes) could reliably make into the four digits without an issue.
To properly heat treat the head again would be costly and I believe you would have to remove all the seats and guides.
Im curious how this deal pans out and the work you did is innovative, but I would get some other opinions concerning the heat treat which with all that welding and the heat it generates is certain to have been compromised. Aluminun heads will only be effective if the aluminum has the proper rockwell....otherwise you will be chasing issues with them for a very long time.
Feel free to call me at AFR if you like next week....
Regards,
Tony
(661)257-8124
Originally Posted by Tony Mamo @ AFR
I hate to be the bearer of sobering news but IMO you just made issues for yourself more than helped yourself out.
Consider the heat treat in the head deck to be now gone....instead of a rock hard deck pressing on the fire ring to seal the combustion pressure the fire ring of the gasket will now sink into the head deck (because its soft) reducing the pressure around the ring itself creating a situation that could cause a loss of cylinder pressure past the gasket and possibly into your cooling system (water jackets).
The standard 4 bolt design with our thick .750 head deck, the proper gasket and good fasteners in an engine tuned right (no detonation and high cylinder pressure spikes) could reliably make into the four digits without an issue.
To properly heat treat the head again would be costly and I believe you would have to remove all the seats and guides.
Im curious how this deal pans out and the work you did is innovative, but I would get some other opinions concerning the heat treat which with all that welding and the heat it generates is certain to have been compromised. Aluminun heads will only be effective if the aluminum has the proper rockwell....otherwise you will be chasing issues with them for a very long time.
Feel free to call me at AFR if you like next week....
Regards,
Tony
(661)257-8124
Consider the heat treat in the head deck to be now gone....instead of a rock hard deck pressing on the fire ring to seal the combustion pressure the fire ring of the gasket will now sink into the head deck (because its soft) reducing the pressure around the ring itself creating a situation that could cause a loss of cylinder pressure past the gasket and possibly into your cooling system (water jackets).
The standard 4 bolt design with our thick .750 head deck, the proper gasket and good fasteners in an engine tuned right (no detonation and high cylinder pressure spikes) could reliably make into the four digits without an issue.
To properly heat treat the head again would be costly and I believe you would have to remove all the seats and guides.
Im curious how this deal pans out and the work you did is innovative, but I would get some other opinions concerning the heat treat which with all that welding and the heat it generates is certain to have been compromised. Aluminun heads will only be effective if the aluminum has the proper rockwell....otherwise you will be chasing issues with them for a very long time.
Feel free to call me at AFR if you like next week....
Regards,
Tony
(661)257-8124
Ill agree with some things you said there Tony, But so far no ones heads have proven to Hold BIG Boost at the track......
""The standard 4 bolt design with our thick .750 head deck, the proper gasket and good fasteners in an engine tuned right (no detonation and high cylinder pressure spikes) could reliably make into the four digits without an issue.""
Now making 4 digits on the dyno and beating the car at the track are two totally different things.
People are still running into the issue of pressurizing the coolant system making big power and NOONES heads have totally stopped it...... make more power and faster ET's then thinner deack heads,,,, yes but not stopped it....
and i think you know W2W has pushed the LSx motor harder then anyone has...(faster also)
Thats why everyone is ditching the stock 4 bolt set-up and praying the new 6 bolt stuff does the trick...... My self included.....
Thats my .02.
And in no way am i downing your product....
Kyle