Just because I am paranoid, after you assemble, are you going to check the piston/valve clearance in a number of positions near TDC (or where the cam puts the valve nearest the piston)? This would confirm the valve is gaining clearance from the machined pocket.

Cheers,

Mike

 

Great thread. I harbor the hope of tackling the top end on mine when the time comes. Very interested to see your progress and hear your comments.

 

RS (Supersport) cams do not present a piston-to-valve clearance issue with OEM 100mm pistons unless the larger RS intake valves are used.

RSR cams on the other hand, are totally different and other measures are required for clearance. Naturally, nobody would be using those cams with the OEM single-throttle intake system anyway,....

 

Hey Steve, info sent. Looking forward to talking with you.... I think.


Thanks,
Emerald

 

NOBODY? Nobody with brains, anyway. A guy stumbled my way probably 8-9 years ago who was sold a bunch of parts, and insisted he'd be making the killer track car with a bunch of 3.8 castoff stuff. Didn't work out so well when I heard later. (I think he went through 3 3.6's before he figured out his nifty front oil tank system wasn't working correctly.)

 

I'm fast approaching the 30th anniversary of being a naive 18 year old with a broken 2.0S. It got done, and the rebuild (and what came later) has basically shaped my life. I got a lot of advice from the likes of Bruce Anderson, Jerry Woods, Jim Pasha, etc. who were here locally. Steve and others "in the biz" have demonstrated they are very forthcoming with their expertise and time; and guys like me a few steps down the food chain are also available. I wouldn't discourage anyone with the desire from having a go.

 

What kind of gains would you see with the RS (supersport) cams and stock valves assuming I have headders and already have all the good stuff inside like compression bumped up to the full 11.3 carillos etc, good valve springs and retainers etc... Im sitting at 265ish to the ground now. Redline set to 6800.

How hard to change out if motor already out of the car for tranny work?

Jeff

 

Here is my thinking. If you have to machine a pocket on the piston, then its worth a check. Why? Well, given its the first time he has put a 911 engine together, it's a good experience to do this, it also checks that the timing is relatively close (or 180 degrees out...LOL). Remember, he is not paying for his labor, so at the worse case it adds to the understanding on how this works, and at most the procedure will take a few hours.

If you are only machining the intake pockets, does it also double checks that the pistons have been put in with the correct orientation? Again, first time through, its possible to put the pistons in upside down especially on a rotating stand where the engine could be top down. Just trying to cover all the bases...

Cheers,

Mike

 

Hey Ken,

Pretty much what I have been thinking. It is great that there are so many experienced folks who are willing to share the knowledge. I am more likely to attempt a project because I feel there are mentors out there to help, so a big thanks to all who are helping.

Thanks,
Emerald

 

Hey Mike,

Yeah, thank goodness I am not paying for my labor, because I am going slow

I plan on taking my time and doing it right. Some parts will be easier because I just did them, and now will redo them, but it is still fun. It is a fun journey that I enjoy and am looking forward to the outcome. It is always interesting to see the different approaches that can be taken.

Thanks,
Emerald

 

Best of luck with it Emerald... and thanks for sharing your work/process with us.

 

Music to my ears!


Andreas

 

We should try to rebuild a Type 1 motor during TOMMY10. Soap would be more than happy to offer his room for this!


Andreas

 

Absolutely! I think my best time for an engine drop was an hour and 15 minutes working solo. My best results are when I am drinking a beer and working on the car. This will be the prefect combination.

 

Thought I would add a quick update. The heads pistons are off to Steve for some work, but I found a box on the porch today.
I sent my fuel injectors off to RC Engineering, and they are back. They do great work and have a short turn around. You get a print out of before and after.
Thought I would share a few pics.

Enjoy,
Emerald