Don Terrill’s Speed-Talk

I do. It was in those mid-late 2000s Vipers. Here's an article released in July 2007 www.thehemi.com/news.php?id=20080211-1 Interestingly, for this application intake lobe timing to crank remained fixed, whereas the exhaust lobe timing could be varied by 36 degrees c/o "an off the shelf modifi...

Was the tech John Erb? He used our knock controller on the dyno when he was at Silvolite. This was in the '90's. Great guy, really savvy I was working with a highly respected SoCal tuner in mid 90's, and John E was interested in producing a line of motorcycle pistons - - anyone know if they did, an...

Ptuomov, given Exhausted's strong preference for large radius bends such as 4" for 1 3/8" od 0.060" wall, have you succeeded in sourcing similar sizes or are you persevering with ~3" radius? Has anyone succeeded in sourcing smaller od pre bend in large radius 304L, 316, or 439, ...

Ptuomov, given Exhausted's strong preference for large radius bends such as 4" for 1 3/8" od 0.060" wall, have you succeeded in sourcing similar sizes or are you persevering with ~3" radius? Has anyone succeeded in sourcing smaller od pre bend in large radius 304L, 316, or 439, n...

1986 VW Jetta, 4dr luxury version with a/c, power windows, steering, heated seats, auto locking, sunroof, cruise control, fuel readout, all wheel discs, 1781cc 8v 4cyl, 5sp 2595 lbs with 180 lb driver and 1/2 tank gas, 1520lbs front, 1075lbs rear - - 385,000km (240,000 miles), everything from commut...

The 6.2 and 6.5 engines are indirect diesel injection, with two combustion events for each power stroke Rebuilding a fundementaly flawed design is risky, and modifying it for greater torque further decreases its lifespan For reference to "tuning" an indirect injection 2.4 litre 4 cyl Toyot...

Wikipedia suggests you have a Toyota 1N-T 4cyl 1453cc engine, 74.0 x 84.5mm bore/stroke, 22.0 to 1 compression INDIRECT INJECTION, not direct injection engine IDI engines create TWO combustion events for each power stroke, the first (partial) combustion occurring within the pre combustion chamber, f...

Is my set-up injecting too much? I'm potentially injecting 1.5 gallons per hour in an 89 CID motor. As at my maximum boost I should be at 51.8% (22.285/(50-7)) maximum injection rate, that should be 0.77 (22.285/43 * 1.5) gallons per hour, but I get knock from the start of boost. More information p...

Chad Why do you think the ports are cleaner? Does that apply to port injected engines as well? Does the distance between intake manifold port injector and clean wall surface remain constant regardless of injector to intake valve distance - - and do the manifold runners and ports of direct injection...

The wet fuel debate might be clarified by running a carburetted burr finish inlet manifold and head combination, then swapping on a similarly burr finished efi manifold with injectors and tuneable ecu - - has anyone tried this?

https://duryeatechnologies.com/duryea-electric-supercharger/ should unearth Duryea's site with their "12V 600A BLDC motor and electronics" attached to a conventional mini supercharger They claim "a 24v version has been commercially available for the last several years" - - anyone...

All the best Jon, no doubt your talent and work ethic will be appreciated
Thanks for sharing enlightening CFD simulations, contemporary designs and manufacturing methods with us
When possible please revisit and keep us informed of your progress

A tad off topic, but I doubt Circlotron will mind - -

Click on JohnP's sig and look at the accelerometer he built and fitted to his pool cue

Very creative, and not just acceleration but directional too

Has your game improved John?

Decades ago we bored a 1970 Honda 750F to take 900F pistons, which needed approx 0.050 added to create the desired 10.5 : 1 compression Placed the guinea pig piston in an ali saucepan with water up to the top ring land including under the dome, and tig welded the ~1/2 x 1" rectangular flat port...

In order to get around the vibration problem, I was able to buy an adapter from Jags That Run that bolts to the rear diff flange, and allows me to run a normal driveshaft with U-Joints. A one piece shaft ends up being a bit long, so my critical speed is around 130 mph. Car is not running yet, but I...