Head Decking

[blitzbuggy]

man there is a lot to take in tonite

[1988festivazoom]

did u look to see if the b6-me and the b6 have the same head gasket? im pretty sure they do so u woul be able to use the sohc 16v head if u wanted??

[blitzbuggy]

they are diffrent

[1988festivazoom]

yeah i just double checked and they are different

[getnpsi]

We used an older b6 with a newer b6 ecu and everything up top. The b3 header will work on the older engines but not the newer ones, the round mazda 323s for example.

A bump in compression will still lose to a car with 16 valves so a low miles swap should still be priority unless you have connections on the machine work, just from a money only point of view.

[1988festivazoom]

i payed 120$ to have the head cleaned, decked, valves lapped, and new valve stem seals.

[1988festivazoom]

We used an older b6 with a newer b6 ecu and everything up top. The b3 header will work on the older engines but not the newer ones, the round mazda 323s for example.

A bump in compression will still lose to a car with 16 valves so a low miles swap should still be priority unless you have connections on the machine work, just from a money only point of view.

my roomate and i race occosanaly and he has a b6 with cam and exhaust and intake.... my car has the b6-me,head decked and exhaust and intake.... i will pull 1 car legenth by the time we hit 4th gear and then by the end of third im almost 2 cars ahead..... and my engine is getting tired.

[blitzbuggy]

my engine has 106,000 kms on it
i will be doing a 3 or 5 angle valve cut as well as porting the head

[Safety Guy]

Festivazoom wrote:

"I payed 120$ to have the head cleaned, decked, valves lapped, and new valve stem seals."

Wow! You got a great deal, IMO. I paid $125 and only had my head hot tanked and checked & decked. Next time I won't be in such a hurry and will shop around!

I'll also do some or most of it myself, if possible.

Karl

[1988festivazoom]

yeah they said for my b6t that they will deck the head .010, new stem seals and valve lapping, and tank the block with honing and inspect it all for cracks/ warping for 220$

[blitzbuggy]

while were on the topic of b6's. what ecm works best, old or new?

[blkfordsedan]

the heads are diffrent, the ports, valves and chamber are all bigger but the head will interchange.... (b3 on b6 and b6 on b3) just use the head gasket for the head your using....

Are you sure the ports on a 1st gen B6 are bigger than a B3? If so, how much bigger? Do you know exactly (in cc's) how much bigger the chambers are?

I'm asking because I've thought about taking a freshly decked B3 head that I have and installing stock B6 valves. I figured I could do some chamber work (like relieve the edges of the chambers to help unshroud the valves) and maybe still end up with smaller chambers than a stock B6. The goal would be to raise compression on a B6 to around 10.25:1 (or at least 10:1) and have improved head flow at the same time. Without some loose heads to compare, it's just a theory at this point.

[sasquatch]

Are you sure the ports on a 1st gen B6 are bigger than a B3? If so, how much bigger? Do you know exactly (in cc's) how much bigger the chambers are?

I'm asking because I've thought about taking a freshly decked B3 head that I have and installing stock B6 valves. I figured I could do some chamber work (like relieve the edges of the chambers to help unshroud the valves) and maybe still end up with smaller chambers than a stock B6. The goal would be to raise compression on a B6 to around 10.25:1 (or at least 10:1) and have improved head flow at the same time. Without some loose heads to compare, it's just a theory at this point.

i have been thrying to figgure this out on my own for quite a while... but i THINK that the best way would to be just get a b6 head, deck it like 20 or 30 thou and port the heck out of it... way eaiser than valve swaping and stuff... i dont think the chambers are much bigger but i dont know for sure.... they COULD be way bigger but i dont know...

[getnpsi]

Interested too if a b6 with a gone over b3 head can be made superior to an untouched b6 long block. My buddy says his b6 smokes on startup and i have two extra b3 heads.

I imagine the later b6 heads are better but the older engines have much more in common, which is what he's running in his festiva.

[lowriderglen]

Smoking on startup

Smoking on startup is caused by worn valve stem seals. Simply replace them on the car and problem solved. The bronze valve guides very rarely wear out. BTW I resurface cylinder heads all day long for $48 each. Good luck