Don Terrill’s Speed-Talk

I was holding it up when flowing the head. The head was sent to an to 3rd party for flowing with an SF-600. I use an Audie equipped FlowData bench. I looked at my bench this morning 43 cfm @ .050 84 cfm@ .100 468 .800 478 .950".. The chamber and valve job are still under review. Were going to s...

mt-engines wrote: ↑Mon Aug 07, 2023 9:11 pm Now throw a spark plug in it and reflow it.

Yeah those low lift numbers look a funky. Flowing the head at my shop it kept trying to suck the intake valve open even after stretching the spring.

Russ probably didn't catch it. The spring worked fine after .150"-.200".

Cool video, some real vintage there.

I’ll throw this question up again. I wonder if having the major dimension of the intake port parallel with the valve seat has any advantage over a conventional upright port ? I realize the lower port is probably at a disadvantage but does anyone think turning ports over like the Y blocks makes up f...

Bump

the cometic are mls, the oem gasket was a steel shim

Thoughts about Y block rocker arm design.

https://youtu.be/z-u1Dp4d1N4

Hopefully tomorrow will be better.

Are these laser scans or digitized information? When I make my cnc porting models it come from digitized information, and there is a bit of refining that can occur before the final skins are produced.

SpeierRacingHeads wrote: ↑Tue May 09, 2023 5:44 pm

Mummert wrote: ↑Tue May 09, 2023 5:43 pm 5.60 rear gear?

A little more.. We use a REM finished, lightened, Ceramic bearing, setup.

https://www.youtube.com/watch?v=PaUt8DLxH4o

High pinion center 9"?

5.60 rear gear?