Yeah...that's exactly what I'd do if ever I had the engine out for rebuilding, why not as you say! :sigh:

So the stock computer would not work so well with the Bridgeport? I had heard that it caused a rough idle and remember reading somewhere that it was for "track only" cars. Do you think the n/a drivetrain would be up to it? Mine has 102,000 so I'm betting that my engine will be in decent shape when I open it up. Hoping anyways. If the Bridgeport is just too much, I will pay the 300 for the streetport and polish and put the rest into the exhaust. Thanks

Yeah...with stock computer it would work but without having all the benefits of the difference in price so I think the best choice is a street porting. I would keep my ECU and fuel system as it is, like you said maybe put some extra money in the exhaust system. My car has also about 100,000, but the drivetrain is in pretty good shape. My engine is not bad either but has power lacking problem but the compressions, fuel pressure and all the systems seem to work as needed...Mystery! I'm waiting for my performance meter, I hope I'll get it on monday.

I'll see then if I'm very far from what it is supposed to give.

You won't be able to utilize the full potential of a bridgeport with a stock ECU. Just go with the street port, and you should be happy.

Does anyone have ever seen what is the power gain with a street port alone on a NA, without any other mod and with exhaust mods, etc...

In other words, what power can you get from a NA. ???

I've read both NA and turbo, on MazdaTrix site and they claim exactly the same thing for both engine.

And I quote : "By the same token, do not expect substantial gains in power from "street porting" these engines - it's a worthwhile addition IF the engine is going to be apart anyway, but definitely not worth taking a running engine apart just to street port it."

This comes from 86-95 Turbo Street Porting at MazdaTrix.

So what's the truth? ???

I can not remember where, but the figure I saw for street porting was around a 22% gain on stock horsepower. So I suppose you would gain about 30hp on a 146hp engine.

When you say 22% gain it's for porting alone, without any other mods? Hard to believe, but if I'd gain 10 hp I would be happy anyway.



What year is your car, is it a '86 like mine?

When you say 22% gain it's for porting alone, without any other mods? Hard to believe, but if I'd gain 10 hp I would be happy anyway.



What year is your car, is it a '86 like mine?[/quote]

:newlaugh: :newlaugh: :newlaugh:

U'd be willing to spend $ 800 and remove your engine and put it back in for 10hp. thats some funny stuff.

with porting like that about 200hp. gsl-se secondaries are recommended 680cc