Don Terrill’s Speed-Talk

So my mate pulled these from his 95 Tahoe (factory 350 tbi) and it's a bit confusing. How is the ground electrode so clean when the rest of the plug is sooty? Is it being washed or something? No real symptoms, just not running very cleanly when cold (when comparing to our more modern cars, so it mi...

Hard to believe pistons are still intact.
Way before this, you already can see piston material impregned on plugs.

It appears to be the axle rotation(pinion going upwards), as you described not be a four-link/ladder bars suspension.

MadBill beated me on that..

As I have witnessed and named it.
Detonation( not controlable combustion), shows very small black dots on porcelain , oil.

Pré ignition, shows melted parts and the first one is aluminium from pistons.

How about a hypothetical? If you could choose one thing on this engine to fix the reversion/timing requirements. What would it be?? Valve springs and retainers. Thinkin you might be right here. TK lobes are aggressive. 200 seat and 500 open is hot hyd roller spring territory lol Could it be happeni...

Here's an example of what I mean. Seat cut with neways. Nice and shiny all round. I mark the seat with black ink and lap the valve to check seating. Result is in the picture. If I continue cutting it does the same thing. Cutter is 45* as is valve in this instance. I'd like to hear people's thoughts...

So I take it that some feel that getting that column of air moving early, is a myth? Isn't that what your doing by taking away low flow? Not at all, but you can get it moving too early, and in the wrong direction. Both are counter productive. Maybe I misinterpreted your answer but, how getting it m...

I can't tell you how many times I've had the lobe list up from Bullet, Comp and Howard's squabbling in my mind over 2* at .200 and a couple of thousands of lobe lift and I'm thinking, "pick one, dammit!" :lol: I do call up and try to get deeper than the front desk to make sure I'm not doi...

S.I valves or Hughes, have them std height or +100.

850 to 900 net valve lift 50° seats naturally aspirated carburetor I hope for 300 feet per second roughly with it running at Full Tilt I think you are asking a lot. 300ft/sec is top fuel stuff. I think he means air speed. not car acceleration. If this is your first time building a setup like this, ...

Here’s some thinking out loud about air-fuel ratios for the RPM ranges in which the turbo is running at low speed and the wastage is closed. One of the high priority goals in those rpms is to get the turbo to spin faster. I’m thinking thru this idea that Mitsubishi uses to spool the turbo faster: r...

Does anyone make a small block Mopar rocker arm that bolts straight on and doesn't need the shafts raised or moved back to get good geometry via the mid lift method? I have brand new Harland Sharps 1.6's and the scrub pattern is very wide. I've looked at 2 different heads and they both have the sam...

Larry, I think most use pic 2 position, because it´s a more favorable position to grind too. Now I`m curious.. Do you grind the short turn on pic 1 position too? i always Port from the VJ Bottom Cut -to- the Intake Short Turn Curve towards the Floor's Apex area , as in my 1st Pic The Intake Short T...

Wow .. that's a big surprise to me ! i thought at least 7 out of 10 would Port looking using Pic# 1 so far ..its way opposite . i thought about asking this , because i had a few recent Emails and all the ST Curve Pics they sent were like #2 Pic i had to flip them vertically in software to study wha...

How the pump would built pressure for one side and none to the other?
I think you have a stering box problem..