I am porting out an ea82 manifold for my webber and was hoping the get rid of the carb heater line, for hitachi autochoke, and the other one that goes to a barb on the t-stat housing. I was just wondering if these two lines cool the block at all because I was thinking about blocking the two barbs on the manifold and conecting the two barbs on the block together. Any thoughts?

 

Hey Tom I though your photo gallery is great. I read on one of your pictures that you need to cut a bit of the altinator bracket away, is this because the heater return pipe on the manifold hits it. Ifso could you cut the pipe shorter instead?

Sorry for the delay in getting back to you on this BB, been busy here, and I kinda over-looked this thread.. :-\

 

Yeah, you can pull the tube out of the T-stat housing, then drill-n-tap for a pipe plug. I'm also under the belief that one could loose the tube under the carb port also, and route the hoses as you stated. I would also have a local welder heli-arc the square shaped water passage at the carb mount of the manifold, then smooth things back down.

 

I appologize for the size of the text in that photobucket link. I didn't know it would come out so small, and that one isn't able to re-size it by downloading it to their system.

 

I can send you a full-size zip file of the write up if you would like it, just send me a PM with your email addy and I'll send it your way.

A less expensive way (and it works good - many of us have done it) is to put a bit of screen into the hole, and fill it with JB weld. You can smooth it out before it dries, and it makes a really tough seal.

 

GD

I have just about finished porting, on the water jacket side i have 3-3.5mm of surface, at the worst, for the gasket to seal. Note that this was a virgin manifold with only minor scraches I have made.

 

I took the head side of the manifold out to 35mm, jeez subaru really dropped the ball on the inside of this bend. All i can say now, is mine looks like a circle. The two extra depth ea82 carb stud nobs are nearly all gone except a ridge where the dremmel would not reach.

 

I have another ea81 big barrel manifold spare so I might post some comparison photos tomorow.

 

For anyone wanting to do the same i sugest you use the dremmel high speed steel shapers. The grinding stones clog up and never cut as well as the steel ones anyway.

 

Three questions:

3-3.5mm enough to hold back the coolent?

 

Like where should I expect power gains when I bolt it on?

 

Is the standard metric 12mm headed bolt fine or course threaded and what size hole?