Ensine Specs/Bluprints - United Bimmer Community

**jybute** · 01-22-2007, 09:42 PM

A friend of mine wants the exaust ports on cylinder head he has opened up, I was looking at it and if I had a few specs I know I could easily do it for him.
Do any of you guys know where I could get this info.

It's a 1978 pontiac 400 cu. in. He wants to put custom headers on it and open up the ports. He told me that a milimeter (.039") can increase HP on that motor by 25-30%.

I would love to do it for him and I could easily do it in half a day or less.

**c1apton** · 01-22-2007, 11:01 PM

any good engine machine shop has them or you can get them from a "MOTORS" manual they also provide clearance & specs. If you're going to port it - polish the runners also. (it's tedious by it's worth the effort & time involved)

**doughboyea** · 04-02-2007, 12:02 PM

Engine Specs/Blueprints....

I recently was wanting to design my own engine. I would make my own thread, but this one is up already.

Is there an online source where I could get "blueprints" of production vehicles? Pay or Free.

I'm sorry Jybute if this is jacking your thread.

Dough