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Hey guys going to be getting my head shaved so just wondering how much can i get off?? Looking for the most gains and still be reliable!! thanks

I got the impression you where talking about shaving your hair

Then you said something of most gains, and it started making sense

nope-mx3

Take it all off! Chicks dig a guy with ...

Oh, wait. Never mind.

By the way it is a 1.6L DOHC!!

So can I get any real help with this??

O.k, you don't want to shave too much aluminum off. You only need to cut the minumum to make it flat and provide a good gasket seal. Let's say .020 of an inch.

how much of a gain can you get with shaving the head? Horsepower/torque/compression?? And what is the max limit i can shave off, to gain the most power?? Thanks

My two cents by typhoonk

1. Get the head and block shaved flat (not too much!!!!)
2. Get head rebuilt, port and polish, and port matching to manifolds, new spring set, new valves, etc.
3. If you got a lot of money do up the block too so it's bullet proof
4. and if your really spending money. turbo, turbo, turbo TURBO!!!!!!!

thank you. This has been brought to you by my two cents.




thank you.

Sorry but im going all motor...NO TURBO!!!!!

-So if someone can help me out with how much to shave off, to get the most power for a N/A please do so!!

.020 shave to get it flat

Then bore out the cylinders so you have a 1.9L or something, get better pistons with a higher compression ratio

Also, if you want to see any gain, you will need new springs, the head is only as fast as the springs. Can't expect a whole lot of gain just getting the head shaved flat, ditch the springs in there and get something better

There are several variables you need to factor into the equation. Typically you can shave upto around .040" off, I think the B6T's limit is .060" because of the 7.9:1 compression (dished pistons give more clearance). What you need to do is get what ever cams, valves, and pistons your going to run along with a can of playdoe from Walmart. Assemble the engine and place some play doe into the valve recesses on top of the pistons. The most accurate way to check the clearance is to assemble the engine and install the timing belt. Useing the crank bolt, rotate the entire assembly atleast 2 full rotations (I'd do 4-6 rotations). This will show you the true clearance between the valve and piston at it's closest point. It is possible to run a valve lift so large it would hit the piston if the both reached their peak travel at the same time (adjustable cam gears are handy for cheating this). You have to do this to determine how much you can shave off the head. If your doing the block and the head divide your smallest clearance measurement by two and remove that number from both. If you accidentally remove to much don't worry, there are shims and thicker head gaskets made just for that scinario.

PS

Shaving the head increases HP because your increasing the compression ration. When you shave the head your removing material from the side that mates to the block. By doing so it moves the combustion chamber of the head closer to the piston, decreasing the volume of the combustion chamber when compressed (piston at TDC).

Damn!!!..thanks again for a really good answer!!!! I really do appreciate answers like that!!

If your going to shave your head down, I would recommend replacing your head bolts. The stress and shearing of a aluminum head on a iron block are unreal from the rapid temperature changes. If you raise your compression ratio this will increase those stresses and if your using old head bolts that are prone to flexing and stretching, you increase your chances of blowing your head gasket at a inopportune moment

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