Don Terrill’s Speed-Talk

After decades of messing with Holley carbs, I only recently learned that the secondary throttle stop should normally be set for the butterfly to just cover the slot, rather than targeting the same ~ 0.040" exposure typically recommended for the primary ...

There must be a story here...

I believe all 366s are tall deck (10.2" vs 9.8"). I've never looked, but it should be easy to externally ID deck height* If it's a short deck it's not a 366.(*say something like upper water pump bolt to china wall measurement).

This pic is NOT a mistake. Girling 3 piston caliper, OEM on Jag, Alfa & others Why? No fucking clue. Some engineering is trial & error, then figure out why it works. Unless you need eye candy for sponsorship, you can skip/ignore a lot of stuff. One unlikely possibility is that they wanted t...

And it wouldn't cook your crotch like the original layout might...

It's an anti-reversion device, as detailed here and elsewhere: https://crateinsider.com/using-anti-rev ... ree-power/

Nut124 wrote: ↑Sat Aug 07, 2021 2:13 pm... Plus I now have a completely new or rebuilt ignition.

And an extensive collection of spares, courtesy of all the parts that you changed before nailing the culprit...

I'll defer to David R., nitro2 or?? for the details...

Can a spark plug foul such that it works OK on light throttle but not at WOT?... Definitely. Cutting out under load is the trademark of fouled plugs. They can sometimes be burned clean by opening the throttle to the point of misfire then backing off a little and holding it there. After a few second...

NewbVetteGuy wrote: ↑Wed Aug 04, 2021 4:58 pm]

What is "CA50"?

Adam

Crank Angle for 50% combustion point.

Per Prof. Google: "Q. Does M5 contain Nitromethane? A. M5 contains nitroparaffins, which are relatives of nitromethane in the same chemical family.Aug. 17, 2009"

Good catch! No coincidence that the 'crack' starts at the misfiring cylinder. It's 99% certain to be carbon tracking due to the secondary voltage finding a lower resistance path to ground than across the plug gap.

Why "T" when you could "Y" for less turbulence? (jk )

If the end of the tube was cut at 45°, resulting in an oval tube exit angled 90° to the exhaust flow, I'd think it would behave the same as the design in question. But then it would basically be the same as common present designs. Maybe the only magic is the throat location in a merge collector. :-k...

...I like that idea of an annular booster. Could be overkill, but still has a wheel turning in my head... A design by a Speed Talker whose name I have forgotten was mentioned and pictured in one of David Vizard's books a few years back. It used a curved pipe from the check valve, entered the (merge...