Don Terrill’s Speed-Talk

Probably not what you want to hear, take the manifold of and give the surface a lick in the mill. An afternoon's work.

Is it actually magnetic as you said, or is it just sticking to the wand? does it wipe off without leaving a residue and then pick up off the rag after drying out? The analysis shows double ferrite but says in the report that it is within averages. Has the block been honed without plateau? Silicon is...

Andrews Products used to offer a profile service.

Some years ago i got a copy of the 'Design and simulation of four stroke engines' from SAE R-186 which is still available but probably of little use in your intended application. The last i can recall of Charlie McCartan being contactable was in Race Engine Technology. A person i knew that worked fo...

Hey Mat, if you want to use the degree icon it is Alt248 ° , a middle decimal point · is alt0183 , diameter is Ø alt669 . If you want to add all sorts of text icons look up wingdings. As you pointed out burn efficiency at part throttle is the key, more timing for a given load and rpm is a less activ...

Tuner, when i did auto elec after my trade one of the machines that proved more wrong than right was the 'Sun Distributor Tester'. And yes the amount of dashpots that were nowhere near what they were supposed to be was more often than not. And as you pointed out any wear and aging seemed to always g...

Dan, the reason the dets were overcome with a full throttle application was because the vacuum advance was dropped out of the total advance curve, and it went back to mechanical advance only.

At part throttle we are not filling the cylinder. We put in enough fuel air mix to equal the power reqd to maintain a steady speed/load. Burn efficiency is what matters here not the mechanical compression ratio. Even then, cam timing will determine what max cranking comp can be achieved, this test i...

We tried a couple of crank tidy ups, first one, S&S pin HD rods and Kenworth tight. Second was full S&S rod set, Kenworth tight. Third was S&S wheels, S&S rods, Kenworth tight 350ftlb [this is the one that kept moving. Fourth was send that flywheel set to S&S and get them to do a...

As Larry said, a full S&S crank would be the best way to go at the HP you are envisioning. We have used a S&S race prepped crank for a number of years now in a 145hp sand drag Sportster engine with no issues at all. Previously we had an S&S rod set in stock flywheels that would go out .0...

Same here, i have every Andrews, S&S print release from around 77, and from after that Crane Motorcycle, Sudco etc. There are also a stack of bearing, machine tool, measuring equipment and engine component catalogs. I have near every National Lampoon and a stack of old early Easy Rider and like ...

Instead of reducing the pin diameter, moving the pin up in the piston is going to result in no loss of strength or gain of weight. Running the pin up into the oil ring groove has been done successfully for a number of years. With a raised pin, after the pin has been assembled into the piston, pin re...

Valve action is dynamic not static. When a valve seats in a running engine it does not place itself gently on the seat in a manner that with slight lateral load biases cause it to leak. It pretty much slaps shut and self centralizes with the assistance of springs and inertia. The forces at play in a...

As has Allen has pointed out, making the female receptacles the active side of the harness is what is commonly used in the make of vehicle i am familiar with that uses DTP.

Deutsch connectors are quite robust, easy to assemble and easy to maintain.

Excellent link Dan.

Yes, crevice volume is included by some manufacturers, some give a pure dome volume which i see as the most common.

Just remember, when adjusting compression by machining the piston crown that each cc is around 2.7g, this saves a lot of wetting out.