Milling Heads Questions
Milling Heads Questions Ok so I'm pretty much a noob when it comes to porting and milling, but I'm having a shop do the work, so bear with me please!
I have a 99 T/A, keeping the stock bottom end and slapping on 243s and a Fast 92. As far as the heads go, what can I get them milled to and still run 93 octane and not have any valve contact with the pistons? Keeping stock valves also, just a port/mill job is what I'm looking for.
My cam specs are .610/.614 242/246 110 lsa. Running Patriot golds and hardened 7.4" rods, would I have to go to a different set of rods if I get the heads milled? Also, what thickness head gasket??
Like I said, total noob, any help is GREATLY appreciated.
I have a 99 T/A, keeping the stock bottom end and slapping on 243s and a Fast 92. As far as the heads go, what can I get them milled to and still run 93 octane and not have any valve contact with the pistons? Keeping stock valves also, just a port/mill job is what I'm looking for.
My cam specs are .610/.614 242/246 110 lsa. Running Patriot golds and hardened 7.4" rods, would I have to go to a different set of rods if I get the heads milled? Also, what thickness head gasket??
Like I said, total noob, any help is GREATLY appreciated.
Teching In
Joined: Sep 2012
Posts: 16
Likes: 0
From: Naples, FL
Just use a .040 head gasket and check PV clearance. The thinner gasket would effectively make your CC smaller by around 1.5cc. If you still have ample clearance, you could use the measurement figure to see how much you could mill the heads.
I know of people using static CR's of 11.5, with my new heads I plan on running around 11.4
I know of people using static CR's of 11.5, with my new heads I plan on running around 11.4
The short block is staying in the car, just swapping my stock top end for better stuff, so I guess milling is out of the questions since it seems like I'd have to flycut the pistons with pretty much any mill work done.
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The engine is staying in the car and in my garage so unless the pistons can get flycut while in the motor, they're staying stock lol. I'm not going for all out max hp for this build, I'm going 6.0/ls3 heads for when this motor takes a dump, I just want more power with parts I already have.
The engine is staying in the car and in my garage so unless the pistons can get flycut while in the motor, they're staying stock lol. I'm not going for all out max hp for this build, I'm going 6.0/ls3 heads for when this motor takes a dump, I just want more power with parts I already have.
I think your missing something here Everyone is telling you need to flycut those pistons anyway. A cam that big will make kiss marks in the piston no matter what head you have. I hope you dont miss a shift cause then its all over ka boom. Flycut and mill to get the most out of the set up. But if you dont flycut you have been warned. Oh and some more food for thought im pretty sure ls6 valves are .050 taller so your preload on the rocker will be tight adding to your clearance problem. I would definitely check PTV clearance and buy an adjustable cam gear set so you can retard the cam if needed.
If you been running it, did you check PTV before? I bet its tight, but if you want to put the 243s on DO NOT mill them
Lot of experts in here... Check valve drop w/ a checker spring see how much clearance you got and go from there to determine whether you need to flycut or not.. This do i or don't i, don't work in the real world.. 20 min of checking can save ya 20hrs of labor.. 
