Originally Posted by andy-gts

yes , I didnt think you wanted any....sure I am going to get it retuned alittle and send the last dyno , or all of them, what ever you would like,,,,seeing the diff from the initial to final tune really made a huge difference...I will search.(file system good for medicine but not for car stuff)

Originally Posted by GregBBRD

That entire "Link" fuel injection system and the interaction with Neil Harvey was not a very good experience....I'd love to see what the changes accomplished.

Originally Posted by ptuomov

If my understanding is correct, that wikipedia "explanation" has a number of errors. Someone should edit it.

For an engine operating with the optimal intake valve closing point, the air at the valve is not moving in either direction when the valve closes. If it were still moving towards the cylinder, you'd make more power by keeping the valve open a bit longer -- air is still going into the cylinder!

Not all manifolds, or even most manifolds, use the Helmholtz effect. Unless you get really technical and call the cylinder the Helmholtz resonator, but that's not what they mean.

The pressure wave reflected from the cylinder near the piston BDC is a pressure wave and it's reflected from the runner mouth as a rarefaction wave in most manifolds. Increases in the cross-sectional area reflect a wave of opposite sign, while decreases in the cross-sectional area reflect a wave of the same sign.

The waves don't move at the speed of sound relative to the runner, they move at the speed that combines the speed of the air in the runner and the speed of the wave in the air. The wave theory that is predictive in engines is the finite wave theory, while the harmonic wave theory really isn't.

I am not pretending to be the authority on the topic, all I am saying that I can't personally make sense of much of what I read from that Wikipedia article. That says something about me and/or the Wikipedia article but what exactly it says is everyone's own judgement.

Originally Posted by BC

Who is tuning it now out there?

BC

Originally Posted by GregBBRD

Can we agree that it is possible to fill a cylinder in a naturally aspirated engine beyond the actual volume of that cylinder....ie 100% to 120% (or higher, in some isolated engines.) To answer Leon's simple question, I think how that happens is somewhat moot...

Originally Posted by GregBBRD

Someone who apparently had never used "Link" before and made the car run much better, the very first day he worked on it.

He must be a God.

Neil Harvey wanted another 10K to "refine" the tuning that was done on the dyno, once the engine was in the car. I did the best I could do....which left plenty of "room" for improvement (I completely "ran out of talent".)

I'm very happy to be using the Alpha N injection pieces (original Bosch without MAF), from John Speake and Sharkplotter, by Jim Corenman, on this project. At the very least, I know that when I run out of talent, Rob Edwards and Jim Corenman can tune the thing.....and if I need any technical help, John Speake will answer my questions the same day!

This group of guys are the very best....and make stuff like this fun!

Originally Posted by BC

I really wish you guys had gone to see the "other" Neel. Neel of Apex. He is very good, and its well known that he is.

For a street driven car its Dyno, Street, Dyno, Street sometimes. Add in cold starts, and its "5am in the morning on a cold day before you go to work"

Originally Posted by BC

You DO make power, depending on other factors, if you leave the intake valve open longer. If you can get the air moving with enough momentum (air has mass, therefore momentum) you can get it to "push" itself into the chamber.

Originally Posted by Mongo

Greg, is the car using an aftermarket throttle body, or another type 928 one?

Originally Posted by jcorenman

Which all has to do with velocity (MV^2), which in turn depends on runner and port diameters... Bigger isn't always better, less resistance but also less velocity.
And different things happen at different RPM's, because the runners don't change lengths. So all theories are correct, and incorrect, depending.

Greg, that looks awesome!