Thoughts on these heads...

Shaun @ Tru6 · 11-14-2007, 08:19 AM

First let me say that I know nothing about rebuilding 911 motors. handy in other ways, but never tackled a motor. But I know folks who can help.

I've got my E down it's smallest components and am slowly rebuilding it.

the motor has 107K on it and runs fine. Some day I'd love to have a 3.0 MFI motor done for it, but that day is far down the road.

What can I do with a $7K parts budget (give or take to get the job done) to make my little 2.0 a real screamer. And if it can't be done, that's fine too.

My interest was piqued with these heads. Would they work? what would you do with them?

http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/377247-fs-1971-dated-twin-plug-heads-cams-cam-towers-1600-a.html#post3586346

911quest · 11-14-2007, 10:00 AM

Not an expert but those won't work unless you go to 2.2 P/C's you could do that and 70.4 crank and some 2.2 E p/c but I don't think you would really need twin plug heads but they are really cool!!

RPMClassic · 06:47 AM

Tony -

Are you saying that 70-72 dated heads won't match up on a 69 2.0 block? Why is that, the head stud spacing is the same and the valve sizing at 46/40 is a bonus. The port size on the inlet would have to match the MFI or carbs, but that is a slam dunk for any shop when hand porting/blending In addition, the 66 mm crank can certainly be used in both applications. I have run these cranks in 2.0.2.2.2.4 and 2.7 cases with great results. What am I missing in your post, I am all ears..............

911quest · 11-15-2007, 07:34 AM

The stud spacing is the same the difference is the head gasket surface the 2.0 use a traditional gasket the 2.2 and 2.4 use the steel ring the reason I said what I did about the cranks is he could use the 70.4 crank and a set of 2.2E P/C's with the heads you have and could build a higher compression "E" motor.

2.0 heads are flat the 2.2 heads fit down onto the cly. they could be machined to work.....