Deck shaving and intake shaving
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
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From: Connectivette
Deck shaving and intake shaving
I think my terminology was correct...
My stock L98 was decked to about .014 the first time it was at the machine shop while it was being punched out to a 383. I didn't have the intake shaved as it never occurred to me to have it done, my machine shop didn't mention it and I had no issues with the intake fitting on the heads.
Now that my builder had to rebuild the lower end for me due to their **** poor math and built me a 12.2:1 compression engine...we are also decking the block again to get my quench area down to the mid .040's. So...should I check for fitment after the heads are back on the block or should I be planning on shaving my intake base regardless, now that the new deck height will be about .005.
As far as the history on my intake base ...I bought it used. It is an Edelbrock high-Flo base.
Thanks boys
My stock L98 was decked to about .014 the first time it was at the machine shop while it was being punched out to a 383. I didn't have the intake shaved as it never occurred to me to have it done, my machine shop didn't mention it and I had no issues with the intake fitting on the heads.
Now that my builder had to rebuild the lower end for me due to their **** poor math and built me a 12.2:1 compression engine...we are also decking the block again to get my quench area down to the mid .040's. So...should I check for fitment after the heads are back on the block or should I be planning on shaving my intake base regardless, now that the new deck height will be about .005.
As far as the history on my intake base ...I bought it used. It is an Edelbrock high-Flo base.
Thanks boys
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
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From: Connectivette
So you don't shave the bottom of the intake where it mates with the head.....you shave the head where it mates with the intake base?
Drifting
Joined: Feb 2003
Posts: 1,978
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From: San Antonio Texas
If there's enough taken off the deck, then some should be cut off the intake side of the head. Any decent machine shop will have the specs as to how much and when. The heads are usually cut so that intakes can be changed at will.
Team Owner
Joined: Jan 2003
Posts: 20,333
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From: Summerland B.C. Canada
that doesn't seem to be the best option. Those heads would become married to the block. Heads costs more than intake bases, so I would machine the intake. Just my opinion. 
Thread Starter
Safety Car
Joined: Oct 2001
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From: Connectivette
I'm with you on that one Dan. I'll talk to the shop when I pick up my shortblock
Last edited by chucks88; Apr 7, 2008 at 09:45 PM.
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
So you don't shave the bottom of the intake where it mates with the head.....you shave the head where it mates with the intake base?
Yes you would machine the intake base not the heads...:o
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Safety Car
Joined: Jun 2000
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From: Long Island, NY
You need to install the heads and then lay the intake on them to see if you even need the intake shaved.
Most times you should not need the intake shaved. The instake gaskets should be able to make up the difference.
How close are you to getting it back togeather ?
Vic
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by chucks88
My stock L98 was decked to about .014 the first time it was at the machine shop while it was being punched out to a 383.
we are also decking the block again to get my quench area down to the mid .040's.
we are also decking the block again to get my quench area down to the mid .040's.
RACE ON!!!
Team Owner
Joined: Jan 2003
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From: Summerland B.C. Canada
Why are you decking block more if compression is too high? Sounds like you would have to deal with piston and head chamber shape first?? 
Team Owner
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From: Summerland B.C. Canada
Race Director
Joined: Jan 2008
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From: oregon
it's called angle milling, my motor had that done on the heads since the deck was shaved and the heads were as well. all in all .050 came off which is why i now need 7.150 pushrods rather than the too long 7.2" ones in the motor now. the risk of not angle milling the head lies in oil entering the intake port from a poor intake seal.
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,763
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From: Connectivette
Good question....I had two issues with my motor....I wasn't happy with the quench area which was .054 and my compression ratio was too high. Yes, these two conditions are fighting each other, but both reeded to be resolved. Solutuion....deck the block and add dished pistons(nothing left to remove from the heads)
