Don Terrill’s Speed-Talk

Steve,
Any update?

Stan

.that's for clarifying where you've decide to take the forum. I decided to make sure Speed-Talk is the #1 Performance and Racing tech forum. Supporting the Industry is a big part of that. It's not political. It's business Would not this thread then better service that purpose if it was in the Gener...

Steve,
Do you have any lash caps you could try?

Stan

Steve,
If you change the push rod length to get the 1.8:1 to work what doe the sweep look like?

Stan

Are you using the same push rod?

Stan

Why are heads with the valve layout IEIEIEIE called symmetrical? That word is for something that is mirror image about a centre line. The only heads I can think of that would qualify for that description are early Holden 253 / 308 CID that are IEIEEIEI. For me examples of Mirror would be EIIEEIIE o...

While the bore, stroke, and rod length are different the two combinations do have the same rod stroke ratio. This graph shows the turn force.

Stan

Two 400 ci engines everything the same but bore, stroke and rod length. Look at the difference in pressure by the piston ATDC.

Stan

Maybe Mike has a simplistic answer I have never found one.

Stan

Jack, Might want to talk with Mummert who is a member here. His 289 sbf came in second place and not where out of first. 390 FE (400") 2,511 289" (296") 2,504 427" BBC (429") 2,448 ( Jon Kaase) 404" BBC 2,412 Stan Dyno sheet from testing https://i1043.photobucket.com/albums/b436/Sleepercp89/289%20be...

What is your weight, et and mph?

► 1100 - 700 = 400 - if greater than 700 this will be less than 400

► 350 / 50 = 7

► 65 * 7 = 455 HP

► 70 * 7 = 490 HP

► (400 / 350) * 50 = 57.14 HP per 50 shoot

Need to work on your math, Has your nitrous system been flowed?

Stan

John Wallace wrote: ↑

Tue Oct 01, 2019 6:54 am

Then you sell them to the Sportsman racer?

John,
I know 4 m sounds like a high number. But 4m @ 7000 RPM is less than 10 hours. GM when they test their 572 ci I believe tests for 50 hours and everything still needs to be in specs on inspection after the test.

Stan

With the way most people flow an intake port are we not really just seeing the difference in efficiency between their radius entry and the intake manifold?

Stan

Stan Weiss wrote: ↑

Sat Sep 28, 2019 10:55 pm

Phil,
What is the intake port cc's for the ported head? Intake Velocity seems high to me.

Stan

Phil,
Actually I got my colors mixed up. I was asking about the exhaust. Red line.

Stan

Mike, This is my post – please don’t move it to DV’s section I’d really like to get talking about this stuff. With everything going on I have sort of lost where I am. First take a look at the finished stage 2 (SEATS CUT) 289 chamber photo below. I think I am getting the hang of this iron porting( A...