Don Terrill’s Speed-Talk

But why keep speculating it won't work? Why not just wait for the results of its testing and then make an informed decision. That is what I am going to do. Theres nothing more to say really at this point.

Good work Charlie, I too am not happy with square exhaust ports. When going into a round primary tube the only thing that shouldn't be going rounded is the flat on the floor. I can't understand this nonsense about trying to discredit port energy. I've read enough about how it will not work! I've see...

Charlie, if I had to do this here's the approach I would take. Cut the flange to head off, cut the plenum where the throttle body connects off, figure out how much plenum volume you need and runner length, how much taper in the runners it should have if any, get a half inch plate for runner plenum e...

jarmoyp wrote: ↑Thu Nov 30, 2017 6:11 am Maybe not 30 cfm back but most..

I have no doubt if the carnut got a hold of it he'd work it over until it flowed proper, and then some

Carnut1 wrote: ↑Thu Nov 30, 2017 6:06 am Smoke, is that a bolt on for VW RB head?

Doesn't appear it is. Here's the link to where I found it with some talk of using Toyota stuff in the mix. https://www.vwclub.co.za/forum/viewtopi ... 94&t=86891

Here's a way to get that 30 cfm back.

100 cfm at 10 inches depression converted to 28 inches depression is 167 cfm.

Charlie's original stock flow of 143 cfm would equate to 85 cfm at 10 inches depression.

Well, maybe it's time to get the clay out and do the exact opposite and see if the ssr does better at .500 to see if you're moving more air than the ssr can hold currently? Is it possible the flow at .500 is about maxed out for the valve size?

Carnut1 wrote: ↑Fri Nov 10, 2017 10:48 am 1110171044.jpgQuickie sharpie curve of intake makes me think raising the flange and adding csa to the 1st half of the port will help feed the bowl. Input welcome. Thanks, Charlie

Seems like a good idea to me. Nice work here Charlie

Photo of turbulence shelf?

I should add I'm thinking in terms of having spark plug back by the exhaust valve area. Seems like that would be the best placement for a more complete burn and so the flame front is traveling one main direction, towards the piston.

Yes Jack I have seen, contrary to what I had initially thought, that it does use the rear sides of the valves, at least until getting close to the head. I wonder if .100 is enough between the head and valve at max lift in a high rpm deal, seems like it would be very restricted but not knowing how mu...

8 years later has any new answers came to light? In a racing flat head, It would seem to me that if the transfer slot is able to flow what the intake port can without being a restriction it would be sized correct. Anything more would be a waste. I wonder if when the explosion occurs and it goes thru...

Pipemax recommendations can be spot on for headers. Lengths, and sizes.... Chad, It is really rare that I disagree with you but for the engines we most commonly deal with all the commonly used programs are far from accurate. DV David, do you also use Engine Analyzer pro? We've had good predictive r...

Those are giant gains!
David or JC, is the high lift on the exhaust decreasing due to a trade off for low lift flow there? If so I think it's a good move, you need that blow down to be very effective. But if it was not a trade off what is going on there, the ssr is not working well at high lift?