Don Terrill’s Speed-Talk

thanks Stan. i just checked the numbers on this head with that blue thunder and it out does the ford head right from .200" through ..800"

now this head isnt canted, has a very shallow angle and the overall height of the head is only 3.775"!!!

is this even possible? dont ask me what head...i'm just asking has anyone heard, or seen flow like this....@.750"

i'll show the head later

Mike's H440D64307 256° @006 202°@.050 .307" cam lift " .491" with 1.7 rockers as a benchmark to compare all others against for the intake is Asymetrical designed as max cam for the 904 lifter Very few other cams designed for the AMC/ Mopar size lifter If that lobe is not appropriate ...

the last few gm cnc bowtie sportsman blocks that ive built all had .8435-.8437 lifter bores respectivly, .0028 -.003 cl is not ideal but with the tall lifter bores i couldnt justify the money for bushing, with an aggressive roller 780 over the nose and 9700 they live and havent been an issue in bor...

I pulled my lifters out of my "street/strip" 350 Chevy at around 5K miles and rolled across my fingertips. Didn't like what I felt, there were rough spots in 3 of the 16 lifters. Replaced them and ran replacement set with a rev kit on top ran that set-up for another 5K miles, found the sa...

one more question,, why are the bores changing sizes now? are they .844" or not :^o this is getting like that chinese block thread you back peddled on before,,,remember that. you were throwing manufacturers names around left and right, then twisting it every which way...nobody can dance like y...

one more question,, why are the bores changing sizes now? are they .844" or not :^o this is getting like that chinese block thread you back peddled on before,,,remember that. you were throwing manufacturers names around left and right, then twisting it every which way...nobody can dance like yo...

for the others who dont know what we're talking about...mr CNC blocks says Dart blocks come .844" which is on the big side for some aftermarket lifters and causes problems. but Dart's spec say they are .8427" to .8437" which i dont see a problem with ,,infact they specifically say th...

unless you buy a setting fixture, money wise the mikes will suffice, buy quality insulated mikes or wrap them with heat deflective tape, you have to become familiar with expansion rates of the materials you are working with , check your mike against a standard after every couple of bearings, even m...

ok, i sent the email to you. i specifically asked about needing .0015" clearance for a .8415" lifter and he said not a problem..and i can have them to the spec i want. i dont want to get this hyd roller topic off again..if you respond , go the the topic i started,,thanks Never got any ema...

oohhh,, i get it. am i not allowed to speak on this subject unless i have a fully equipped shop. you tell me if i qualify..i bore my own blocks, have dyno, all valve work, port heads, flow bench, blah blah blah the only thing that leaves my shop are cranks ...but whats all that got to do with this,...

Not real worried about idle oil pressure, more about what that difference means in leaked oil. That 68% increase in flow area is real, and the effect on oil leakage would be higher as the flow would go up more than the clearance increase. All that extra oil and reduced residence time has to be a ba...

ok, i sent the email to you. i specifically asked about needing .0015" clearance for a .8415" lifter and he said not a problem..and i can have them to the spec i want.

i dont want to get this hyd roller topic off again..if you respond , go the the topic i started,,thanks

Not real worried about idle oil pressure, more about what that difference means in leaked oil. That 68% increase in flow area is real, and the effect on oil leakage would be higher as the flow would go up more than the clearance increase. All that extra oil and reduced residence time has to be a ba...

Simple flow area math - use a .905 diameter, .0005" increase in radial clearance, and 16 lifters and the flow area is the same as a single .170" diameter hole. Of course there are cd effect, the length of the passage, and who knows what the lifter movement does to the oil flow, so this si...