Don Terrill’s Speed-Talk

Year late and a dollar short, but I never knew the Dusenberg used quarter-speed cams. Now we know where Bus Schaller got his inspiration.

Glad you found your way out of the woods.

Learn something every day. That 30 degrees of advance at idle may only be applicable to highly modified Willys six-cylinders w/EFI; I'd never have thought to try that much initial advance on a flathead.

How different were they from the Boss 302" Tunnel Port heads?

Blocking the exhaust crossover... Hmmm... IF I am not mistaken, years ago in school they said that reduced combustion chamber temps to reduce NOX. But yes, that would indeed heat up the intake manifold. I am interested in hearing more about plugging this rather if I do it or not. What, the passage ...

FWIW, we deal in weird shite all the time. The pro tip is to get really deep into all the on-line and hard copy bearing dimension listings. Thus far, we've been able to find a "close enough" bearing, sometimes machining the bore to fit the OD of a bearing with the correct ID. On rod bearin...

Back in another lifetime, I would fill the exhaust crossover passages with molten aluminum and then carefully port the exhaust end. Then, one time I didn't have time, so packed the crossover portion with scrungled aluminum tray and used a .0625" thick stainless steel shim at the intake gasket s...

Walter R. Malik wrote: ↑Thu Apr 18, 2024 4:27 pm Cooler intake air temp is crucial for squelching detonation; even at under 200 degrees water.

Just scanning through Motor Trend and saw some numbnuts hot rod shop, their high dollar build featured two K&N open cone air filters on a y-pipe right behind the radiator.

On our obsolete iron heads: Block the exhaust heat crossover Large electric fan with shroud Outside cold air intake Fuel return line to the tank Custom ignition advance curve; lots of initial advance and plenty of vacuum advance at cruise. Tuning the carb with an on-board wide band O2 sensor. As lit...

On a recent Engine Masters episode, Steve Brule gave up trying to tune a particular intake/carb/cam combination. He basically said, "I've spent hours just to make it less bad, but it will never be good." Is it possible your combination of cam overlap and the intake plenum design just don't...

As previously stated, overlap has nothing to do with the theoretical dynamic compression or the actual cranking compression; the IVC, the intake closing point is what determines that. To get a better understanding of this, go to a cranking compression calculator. The same 10:1 static compression can...

said anything over 140psi good for a street car

Good for what? In what application? Economy or max power? On what fuel? 200 is about as high as iron heads will tolerate, but again, depends upon the quench/squish and chamber design.

jack vines

Schurkey wrote: ↑Sat Apr 13, 2024 7:53 pm Obviously the US Customs needs a bitch-slap for allowing that counterfeit crap into the country.

Those who profit from that counterfeit crap are more numerous, larger and stronger than those who are harmed by it; ever thus.

:mrgreen: :mrgreen: At 4.0 lb/hr the engine quit. It is back at 5.5 lb/hr because that keeps the A/F between 16 and 18 (no sounds of detonation). MAP moved around from 57 to 52 KPa. EGTs are around 700 degress. Less smoke at the tailpipe but still smells rich. Should I be concerned about the lean A/...

In-Tech wrote: ↑Wed Apr 10, 2024 12:49 pm You can leave the timing up, headers run cooler.

Yes, set the idle initial advance to the happy spot. However, that requires modifying the distributor centrifugal to limit the total. Flatheads do not like much total advance.

when does the brake light turn on when driving in 'one pedal' mode? Basically any time the pedal is released sufficiently to slow the car; IIRC any time decel reaches .1g. Most EVs have at least two decel rates, some three and some four. The driver selects how sensitive he wants the one-pedal to op...