Don Terrill’s Speed-Talk

By the way, do you know who designs crankshafts? Take a guess. Is there only one crankshaft designer in the US ? Come on, let's be honest. You don't know who designs crankshafts. You only know brand names. And, most probably, do not know why one crank should be different than another design. At one...

Who cares, it doesn't matter. Seriously, my god man. Have yo ever ran Av gas? Yes or no answer. David Redszus has been an excellent contributor to this forum for over 15 years bringing real tech. You on the other hand are the newbie who has contributed nothing useful. I suspect the problem is you a...

I find it quite interesting that some experienced racers are so adamant about defending their knowledge base, even when they are quite wrong. Trained fuel chemists would require documented testing results. While everyone is entitled to their opinion, shouting down an opposing viewpoint is amateuris...

I find it comical, that there are guys who literally think that you can distinguish a difference in throttle response because they have a different fuel. The other thing in av gas threads how the experts come out of the wood work, that have never used the stuff, that tell everyone why they shouldn't...

Weird Elon wants to ban this stuff.

Cheers, that worked. Freiburger needs to "take more notice of the internet experts", slander your audience, then again they were right, Freiburger was wrong. More bottom end from the shorter runner dual plane, that is if you measure the runner to the plenum. Dyno Proven 50 HP With One Bol...

Anybody got a screenshot of the dyno comparo sheet from the 2015 season 1 ep1 Motortrend dual plane v tunnel ram test ? Can't watch it in OZ. You should be able to watch it here. https://www.dailymotion.com/video/x3pic66 Cheers, that worked. Freiburger needs to "take more notice of the interne...

They have the potential to for sure. Just depends what each given combo needs. Warp can correct me if I'm wrong, but I don't think the way they run them on 358's, that they really flow any more than the sb2.2's, as you stated, there's other reasons they use them now, but they can flow a lot more, bu...

90-120 seat 220-300 open. Very generic question with a generic answer, unfortunately. I would definitely look into a beehive spring, an OE LS or light upgrade. PAC-1280X or PAC-1215. Honestly why? What's wrong with a $40 set of "Z-28" springs? For a run of the mill, .500 lift hyd flat tap...

I agree 100%.If it were built strictly for drag racing,the cam would need to be bigger.More carburetor would help too.My main effort on this deal was to see if I could get close to the 4.500 bore spacing 11* engines that all the top Chevy guys are using.We did 2 of them & they made 880 on our d...

I recently found out the hard way, that you can go too low on spring pressure, for break-in. I would always say, drop the spring pressure as far as you can. One customer did what I said, and had about 70 lbs on the seat, and only about 160 lbs at max lift. He ran the engine for 20 minutes to break-...

Intake manifolds are one of those things that I’m not sure how you can define “better”. It’s all application specific. What may work best on the dyno may not drive the best on a road course or circle track, or be more sensitive to fuel distribution issues when g forces are added, etc. This on top o...

Hopefully Eric goes over which mods picked up power in his next video. I'm surprised by the Performer EPS, it did well, which is so close to my Performer which I modded a while back. Again, this has all been done many times. Just a reminder, Car Craft did a test back so many years ago, they tested ...

Chief & others, Thanks for all your advice & experience. I was really a little dissappointed in engine.I expected 876hp from how the other 4" stroke engine have run.I guess the additional 1/8" stroke made more torque but not more power.I think it is using all the head & to get...