Don Terrill’s Speed-Talk

My thinking is look at what F1 has done with pistons and rods and materials, especially back in the day of the 20,000 K rpm Cosworth & Honda engines. Much has been forgotten since. Then look at what has banned since. Then look at what has been banned in NHRA Pro Stock. No carbon fiber parts in t...

Yes indeed MadBill. Those plates fixed/housed/sealed the tops of the wet liners, and set them in place at what was the original magnesium deck surface height (duly cut down to suit the plate thickness). A stability measure, and a dissimilar material corrosion measure to stop corrosion between the bl...

I figure a high revving rapidly changing drag race engine might get away with a few torsional resonances since parking at 1 rpm for any length of time won't happen. But, the rapid speed change especially during a hard shift will have the alternator rotor's inertia twisting pretty hard on all the pa...

IV alternators (don't look at anything else) are rotational, so depending on which way it's spun you'll need the correct rotation. CW and CCW (courtesy mostly of Honda applications) are readily available. Denso is the premium choice, a new/rebuilt OE unit far superior to any 'brand new' spurious kn...

BCjohnny wrote:

TOL wrote:In this case it is a highly supercharged methanol V8, custom built.

Two bike/four cyl engines on a common crankcase? Bit tied up at moment but will respond fully later.

Custom billet heads and block. 90 degree bank angle. This one is 509 cubes, but others may be bigger or smaller.

In this particular application the engine will start and idle at around 1500 rpm. It will shift at 11,000 plus rpm, and under load it will accelerate at about 1500-1700 RPM/sec............................ Might be wrong but sounds four cylinder. If you want to give engine specifics I can maybe give...

Thanks for all of the replies so far guys. Much appreciated!....

In this particular application the engine will start and idle at around 1500 rpm. It will shift at 11,000 plus rpm, and under load it will accelerate at about 1500-1700 RPM/sec.

Looking for general thoughts on a bit of a weird question........... In a high and rapidly changing engine rev environment, is it reasonable to think that a person could direct drive an alternator off the crank using gears without any compliance (ie: no torsional absorber, and no belt)? Or, should a...

Were they pinned so as to prevent rotation (radius top), or were they free to rotate (spherical top) ?

A pal of mine has a (I should say the ) 1002 c.i. BBC-based Batten 4 valve V-12; I believe it weighs ~ 750 lbs... The dry weights for the 60-degree Batten V12 are listed in the promo materials as 575 # for the aluminum block version and 525 # for the magnesium block version (anywhere from 680 to 10...

These Mercury engines have nothing in common with the Batten 32 valve conversions of the 80's & 90's apart from the fact that they are both 32 valve. The Batten B4 conversions used various BBC (4.840) blocks with a unique 10-bolt Arias style head stud pattern. By the way, here is a 32-valve B4 w...

Apparently they are sold out for the next 24 months already. If anyone has some money to risk on an adventure and wants to go after this market, give me a call. http://img696.imageshack.us/img696/7507/capturexbs.jpg http://www.mercuryracing.com/sterndrives/hp1350/specs.php http://www.mercuryracing....

They were all 1.6250" OD flat faced. Wow, how much lift did they want to run? That bucket would give you .650" lift with only 296 seat duration, and 256@.050". One of the engines here is just under .720" lift for the intake and looks to pretty much sweep the whole bucket face. T...

I don't know why buckets would cause any frustration. They're the most simple system out there, and you can buy buckets in about any size. Maybe the Batten buckets were too small (I don't know the dimension). But the explanation I heard was they couldn't get the lift they wanted within the duration...

I would tend to agree completely (if one has a wet motor). I'm curious as to what sort of static coolant pumping head pressures you have seen upstream of the restrictor versus RPM? Obviously 28 + ?X? where X is a function of RPM. I've seen static plus 50psig from an OE serpentine driven (just under ...