these are preliminary pix of the porting on my engine


small porting hehe

 

wonder if ill have ports by the new year.....

 

What is being done to the cooling passage beside the intake port?

 

some more



and stock UNPORTED housing



and a cool pic of rotor on top of housing

 

I'm still faster than you! Well until your engines not together that is. Looking good. What kind of seals did you decide to go with? Are you re-using any thing?

 

stock mazda 2mm seals. only parts being reused are rotors and eshaft

 

Vosko,
Is there any reason in particular why you decided to go with the stock 2mm seals?

 

the main i went with stock seals is because they seal the best. from what i'm told the hurleys are good but will not last nearly as long as a stock seal but when the hurleys break they don't damage anything. i also went with what my engine builder said since he has built many high hp engines with stock mazda 2mm seals and no failures.

 

the war on 2mm vs 3mm seals will never end

the way i look at it 2mm seal better yes.
many tuners use them with out blowing up the motors. but how many miles does a real race motor see?
also most real racers or tuners know when to let out of the gas if something is not right. detonation, or not staying under boost to long when you are trying to win a race against someone

3mm seals take a little more detonation if it happens. your car could be tuned good and get a bad tank of gas.
The Hurleys may not last as long as stock seals. but if you are building a high hp motor do you really thinik its going to last over 60k miles?

but like you say you go with what your builder suggest. I am going with 3mm hurleys from what mine suggest. I am kinda stating what he told me. He would run 2mm in his own car, but unforesen problems with a street car, for a little more safety i am going with the 3mm. But with my setup I dont think it will last 60k + miles. if it does thats at least 3 years of heavy drving.

 

vosko,
Who's port template did you use?

 

template, riiiiiiiiiiiiiiiight . that is an ito-spec port. my mechanic is doing all the work. he's very good if you follow import drag racing, he did the porting on pepe loco's car.

 

The guy I build engines with doesn't use any templates realy at all. He does the first one by hand then puts a piece of paper on it applys pressure to get the outline then cuts it out and duplicates it to the other side, same on the exhaust ports. He has bean building high end stuff since the mid 70's. He use to be good friends with Jim Downing and traded secrets with him so he knows what he's doing even if it is some old school stuff. Any ways I think we should do more talking about porting on the forum mabe even start another whole sub forum for it.

CJG