Don Terrill’s Speed-Talk

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 springs without the ...

I have run the PSI 1277 springs for years and been happy with them. I just upgraded to a PSI 1.30" diameter spring looking for better stability in the valve train to turn 8000rpm. The springs are not much more expensive but I had to get a custom set of retainers from xledyne which were expensi...

CamKing wrote: ↑Tue Apr 02, 2024 1:41 pm

Turbobuick6 wrote: ↑Tue Apr 02, 2024 8:46 am 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

I have an unknown solid roller cam we are going to try in my Son's sbc 377. Cam specs are 298@.020 266@.050 .445 lobe on the intake, 306@.020 268@.050 .420 lobe on the exhaust. Thinking the shift will be at 7500. 11/32 2.08 / 1.6 stainless valves. We have a rev kit. I have no idea what valve springs...

I enjoyed all of it! My son and I built a swirl port special a few years back that runs way harder than it should. Some mild port and chamber work, 1.6 exhaust valves, hyd roller cam, 9.3 compression, headers, rpm intake, 4180 hoĺley. Now after seeing Charlie's testing I've got some ideas to make it...

https://youtu.be/sXPN2McLxxA?si=Z_N6HJ0X79eMIGfl Watch then discuss. (F-bird, I expect no less than 6 post in a row from you :D ). Big numbers from a stock unported airgap intake... if the 4150 supported all the airflow the engine needed with that intake then it must have been a jigher quality of a...

I've seen the stock Chev oil bypass stuck partially open with pieces of valve seal material. A buddy had thar happen, no idea how long that engine was flowing unfiltered oil. Running only the internal filter bypass might have saved that engine?

.003" with .004" on #5 is no problem and you will have zero issues. Just curious why you dont have the oil pump bolted on when checking. Bolt it on and watch the cap move. Surprised none of the other experts didn't notice. Thanks for the reminder on the oil pump! I know you are supposed t...

I haven’t seen much benefit in increasing bowl volume. I’m curious about those who have. Does it help the short turn? Good question. If the flow is good at .600 but goes backwards at .650 lift on the flow bench will it do the same thing on a running engine if the velocity is lower in real world? I ...

Dave B wrote: ↑Mon Feb 26, 2024 6:40 pm What weight oil you running?

Thinking 15-40 or 20-50

Were the spacers bought or made from 400 bearings? Does the main size give the spacers sufficient crush, and does the spacer id give the bearing shells sufficient crush? I would rather see them on the tighter side (.0025 1-4 and .0030 on 5 at least) but it will be fine the way it is. Although not t...

Tom68 wrote: ↑Thu Feb 15, 2024 11:28 pm Well explained in Eric's latest video.

That's my Son's work. We'll see how it does!

Rhoads may be another option, I know they were always good years ago and they assured me their still the same made in USA.

BillK, put the feeler Guage between the journal and bearing or between the cap and bearing?

Yesterday I was helping my Son do the mockup assembly on his 377, we ended up with .003 oil clearance on #1,2,3,4 mains and .004 on the rear main. I was originally shooting for .0025" and will have to order some more bearings to get there. A respected builder told me .003" would be a good ...