Don Terrill’s Speed-Talk

Also, lifter bore wear becomes an issue with 50 or 40 or even some 30 year old blocks. When the lifter falls over a thou or so, that face angle changes. It only take ONE lifter bore to be worn to far, to wipe out a camshaft. And it also doesn't help that we have sanctioning bodies like IMCA that do...

You mentioned that the angle of the mating surfaces are important not necessarily what angle they are. Do you check or resurface the lifters that you sell? We do not resurface lifters. We control the amount of taper, we grind on each cam. We check the crown on a couple of lifters from each tray we ...

Wesman07 wrote: ↑Fri Apr 26, 2024 9:34 pm
40%?! I just bought a Howard’s cam. Mike couldn’t get a core. I remember Mike saying he had under a 3% failure rate?

We're actually under 1%. On a bad year, we may see 3 failures.

Oh, the problem is "wobbelin" :D Watching that, is like listening to your Barber explain Cold Fusion. I sold those guys a roller cam back in 2014. I wish I knew they had a cam grinder. #-o You can't look at lobe taper or lifter crown as individual specs. For every lifter crown radius, ther...

What Rocker Ratio? Without the rocker ratio, no one can make an intelligent recommendation. 1.5 ratio on intake and exhaust. Mike, also would you take a stab at what a safe valve lash would be? Thanks Since there's no way to know how aggressive the lobe profiles are, I would go with the ISKY 9935 s...

Turbobuick6 wrote: ↑Tue Apr 02, 2024 8:46 am What Rocker Ratio?

Without the rocker ratio, no one can make an intelligent recommendation.

My understanding is Dr Charlie McCartan has stopped selling the software. But no official announcement. That's my understanding, also. I contacted them a year or two ago, because their software had the ability to take a valve lift curve, and work backwards through the finger follower geometry, to p...

Well, after making multiple comments on preferring emails, this happens. I just got off the phone from an hour long call with tech support, regarding our "tech@jonescams.com" email. Supposedly someone was trying to send malware to everyone on the server our website is on, so they have shut...

just got off the phone from an hour long call with tech support, regarding our "tech@jonescams.com" email. Supposedly someone was trying to send malware to everyone on the server our website is on, so they have shut down communications with that server, until they get it straightened out. ...

Kudos, Mike. You and Ed went different ways in making cams, but a family-owned company is always my first choice to deal with. Thanks for hanging in there. I was never the salesman Ed was, but even back in the 50's Ed new how valuable his time was. If you called Isky Cams to talk to Ed, according t...

Many of us old school guys are "no phone number, no business. I also respect the business owners wishes, if they only communicate through e-mails, OK by me, I am still able to accomplish what I want to do with business owners who still have customer service and a phone number. I know the world...

buy a set of the GM LS7 lifters, and be done with it.
Buy them direct from a GM dealer, because there's a lot of fakes being sold on the internet.
GM part# 12499225

Exactly what I'm talking about. 19,000 cam tests?!? Lol If I remember right it was over a 3 year period. Do the numbers, it's physical impossible, especially in the 80s! The funny thing is, my dad was friends with Harvey Crane, and when he went to Crane Cams back in the 80's, Harvey was giving my d...

You won't see that issue with our Hydraulic flat tappet lifters, and that's the reason why they're $170 a set.

mt-engines wrote: ↑Thu Feb 22, 2024 1:39 pm Tough to beat 500,000 dynos..

You are correct.
Fiction always has a huge advantage over the truth.