Ralph, the car feels pretty damn good. Great engine note, really screams above 4500, and this is with the stock exhaust. It seems a LOT louder than it did before. That and there seems to be a lot more power, and the power seems much smoother. the whole engine just feels tighter, it's hard to describe. I am just starting a job, so I haven't really gotten a chance to have fun yet. I'm hoping that this saturday provides an opportunity.

I would have liked to have done some dyno runs, but the reason this whole thing started was an overrev. So I didn't really get the chance to see what she was putting out prior to the surgery. If she hadn't needed the valve guides and the new valves, I never would have dived into this particular pool to begin with.

Between engine loosening, AFR tuning, moving to a lighter weight synthetic oil and an exhaust system, I'm hoping I can squeeze another ~20 hp out of it. That would make me very happy. I'll definitely update you when I get a chance to wring her out a little.

Very nice! Glad to hear that it worked out for you and you had a minimum of downtime. Yes, you'll find some more power with a less restrictive exhaust and the AFR optimized and the added displacement should make the motor smoother up the rpm range compared to a 3.2L that does very little until 4,000 rpm IMO.

Getting back from NYC and NJ yesterday, how the heck do you guys deal with the oppressive humidity on a daily basis? It's brutal.

Ralph

the great 911 air conditioning.

Dynapacks dyno more conservatively than Dynojets, so don't try and make a direct comparison. One clue was when Rick Deman swapped in a stock DME during the runs got around 185 hp, a number that would be considered low even for a bone stock 3.2. Perhaps it's the Dynojets that are optimistic. With a better exhaust, you should develop more power. Looking at your current fuel mapping, I can tell the potential is there. I spoke with Rick yesterday, and he wants the AFRs programmed around 13.5:1, so we'll see how it dynos.

Did you (I mean your mechanic) test the compression ratio? Didn't Ralph have a bunch of problems with the compression ratio on his motor with the higher CR "Mahles"...

It seems that the 3.4 may not be worth the extra money for pistons unless the entire piston/rod combination is lightened and stronger. Also can polishing the cylinders to reduce friction make improvements? It seems that just .2 L can't make that much difference. Improving the flow, CR and efficiency should be much more important. This is good information although I can't afford to rebuild mine now. I have thought of a twin plug change but if I stay with 3.2 will the CR change to 10:1 be too much?