Don Terrill’s Speed-Talk

I may not win the competition but I am sure I will win over the confidence of a few open minded engine builders who will see the benefits of a motor build using all easy to get 'off the shelf' parts and get the near perfect combo and have the build done with the least shop time involved. Yeah ryte ...

Gregory do we get an update on Vizerds mystery heads entry?

" David Vizard/
Terry Walters SBF/Mystery Heads"

When will the unveiling occur?//so exciting like the old days...nostalgiic

The new look and feel of speed-talk.com is impressive. It's good to be back.///I have a lot of reading to do to catch up. So..in case I missed it somewhere. What is the purse for this ££? Does anyone feel they have an answer to compete with Vizerd's entry??? Very exciting match up here. Seems like i...

DOes anyone know what the losses in friction from narrowed bearing effect on horsepower is/////?

I certainly don't envision things that way ... if the contest was full of "wanna-be's" maybe. Well that certainly would not include Dave Vizerd it would appear that his participation in this event has made people nervous but after he wins he will be teaching how so competing is not in vai...

Any other first time entrants out there who like a certain engine platform...? Randy, what do you think it will take to win the inline class this year? Really, I have no clue. Guessing it would be somewhere over 1,600 points If I can nearly match what I did last year with the C3 Ford, I will be hap...

LoganD wrote: ↑Tue Mar 19, 2019 2:47 pm Just to be clear, my name is not David. I do not know David Vizard personally.

. sorry there I hope I didn't spoil your anonymity I should go back to reading It sems every time I post things go awry.

That's easy, a shrouded valve will cause more charge motion, generally in the form of tumble. This will help BSFC and knock resistance. Most modern tumble port 4-valve heads deliberately shroud the area of the intake valve near the cylinder wall to cause a low pressure condition that forces tumble....

YOu can definitely tell he knows some stuff his and speards videos are both real good

I believe it was Andrew vizard who said that his writing were mandatory reading at high performance schooling facilities he has the how to series...

I used to always watch his tutorials on utube but haven't seen him lately I wondered if he may be on here sharing.

IS he a member here by chance I didn't see it in the directory\\\?

v2.70PF/23º 2.70in² MIN 64-67cc chamber 1.300 x 2.300 opening Fel Pro 1289 (trim) 2.82in² AVG CSA 5.40 port length 250cc runner 2.125 intake w/32º BC 1.600 exhaust 45º intake seats radius 45º exhaust seats 4.155 fixture .200 142/113 .300 210/155 .400 263/189 .500 293/212 .600 320/230 .700 332/241 .8...