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Search found 663 matches

by ClassAct
Sun Jan 16, 2022 10:05 am
Forum: Engine Tech
Topic: ICON 9929 Piston Specs
Replies: 14
Views: 275

Re: ICON 9929 Piston Specs

If all you can get is a 1/16-1/16-3/16 ring pack I’d look for a different piston. There is no reason to run those big, heavy, clunky ring packs. I’d spend more money on pistons and rings and skip the 4 corner cooling. Rings reduce friction and save power. The 4 corner cooling is a fool’s errand.
by ClassAct
Sat Jan 15, 2022 7:39 pm
Forum: Offtopic Forum
Topic: Tuner anybody know?
Replies: 3
Views: 178

Re: Tuner anybody know?

I talked to him Tuesday. He is doing well.
by ClassAct
Sat Jan 15, 2022 12:13 pm
Forum: Engine Tech
Topic: Cam design basics ?
Replies: 90
Views: 23343

Re: Cam design basics ?

That's exactly what we did with the classes that were restricted to 9-9.5:1 compression. there were a lot of restricted compression classes in the late 80's, Modifieds, Asphalt Latemodels, Winston West stock cars, and others. Besides the compression limit, these were engines that had been well deve...
by ClassAct
Thu Jan 13, 2022 10:24 pm
Forum: Engine Tech
Topic: Cam design basics ?
Replies: 90
Views: 23343

Re: Cam design basics ?

Bringing this one back from the dead. I heard Mark Cronquist of JGR mention today about closing the intake valve "early"* on restrictor engines / limited compression engines to build cylinder pressure, but he has learned with the less rules JGR Baja truck engines that you can close it too early. I ...
by ClassAct
Tue Jan 11, 2022 11:41 am
Forum: Engine Tech
Topic: PCV vs EVAC
Replies: 46
Views: 1328

Re: PCV vs EVAC

You can use both Chad. Even if it’s a drag car. The PCV does the bulk of the work when you are at idle and cruise back up the return road and in the pits. At WOT the Evac’s do the work. Even at cruise (any high manifold vacuum situation) both the PCV and the Evac’s pull crankcase depression. I sugge...
by ClassAct
Mon Jan 10, 2022 3:21 pm
Forum: Engine Tech
Topic: Budget Parkerizing flat tappet cams at shop
Replies: 35
Views: 1122

Re: Budget Parkerizing flat tappet cams at shop

Parkerizing won’t stop a cam from going flat. You have other issues.
by ClassAct
Mon Jan 10, 2022 10:35 am
Forum: Engine Tech
Topic: 440 motorhome build- 30 degree intake seat?
Replies: 41
Views: 1184

Re: 440 motorhome build- 30 degree intake seat?

There you are! I was waiting for you once again to make your no merit comment disparaging 30 degree seats! I and many others ( by means of iron heads no less ) have produced well over 650 hp while running 30 degree intake seats , so I hope you don’t mind that myself and others continue to do so whe...
by ClassAct
Sun Jan 09, 2022 10:38 am
Forum: Engine Tech
Topic: 440 motorhome build- 30 degree intake seat?
Replies: 41
Views: 1184

Re: 440 motorhome build- 30 degree intake seat?

There is no reason to use a 30 degree seat. Ever. They look good on a flow bench and that’s about it. Since the argue anything and everything crowd will chime in and tell you how stupid I am, think this through. Chrysler wasn’t stupid. And they didn’t bother with a 30* seat. Do you think they just s...
by ClassAct
Fri Dec 31, 2021 7:44 am
Forum: Engine Tech
Topic: HV oil pump/too much oil on top Q
Replies: 74
Views: 2148

Re: HV oil pump/too much oil on top Q

I’m not so sure that the HV oil pump is the issue. The pump can only force X amount of oil through the system, which is determined by the total amount of leaks. The HV pump can only get the bypass to open sooner. The total flow through the engine is the same. In other words the HV pump gets more oil...
by ClassAct
Fri Dec 17, 2021 6:35 pm
Forum: Engine Tech
Topic: 1 inch balance holes in end of crank thows bad?
Replies: 9
Views: 695

Re: 1 inch balance holes in end of crank thows bad?

If it worries you, in the last century 2-stroke bikers used to glue corks into crankshaft balance holes to 'improve flow'. Simple & cheap to do and the liteweight plugs won't modify the crank balance factor. I doubt if you'll see anything + or -, but then you can go onto something else with a clear...
by ClassAct
Sat Dec 04, 2021 4:28 pm
Forum: Engine Tech
Topic: Edelbrock VRS-4150 Carbs
Replies: 7
Views: 556

Re: Edelbrock VRS-4150 Carbs

It was released at SEMA this year I think.
by ClassAct
Thu Dec 02, 2021 9:56 am
Forum: Engine Tech
Topic: Question About Sleeving A Block
Replies: 19
Views: 789

Re: Question About Sleeving A Block

I have sleeved and re-sleeved hundreds and hundred of holes. There is no reason to use a torque plate or anything else. The sleeves are not that round anyway. I never used .062 wall sleeves either, unless I had no choice. Once the sleeve is installed you want some wall thickness because you have to ...
by ClassAct
Mon Nov 29, 2021 9:44 am
Forum: Engine Tech
Topic: Solid roller lifters on hydraulic roller cams
Replies: 41
Views: 2510

Re: Solid roller lifters on hydraulic roller cams

I have heard of people doing this. Question is why? And what's the reliability on this? Will it last very long? I don’t use hydraulic lifters any more because they are just as noisey as a solid anyway. Plus the hydraulic lifter is a shock absorber in the system and a solid lifter takes that out. Yo...
by ClassAct
Mon Nov 29, 2021 9:40 am
Forum: Engine Tech
Topic: Who regrinds the lifter face crown on used lifters
Replies: 16
Views: 1293

Re: Who regrinds the lifter face crown on used lifters

I have a few used sets of older solid SB-BB Chevy lifters. Do you Guys know of anyone out there that will regrind the lifter face crown to the 35 degree face radius and add the small oiling hole to? What’s the price? And who dose it? Thanks for looking, =D> Ron I sent mine to Schneider Cams and had...
by ClassAct
Sat Nov 27, 2021 10:53 pm
Forum: Engine Tech
Topic: Push Rod Length: Shorter vs Longer
Replies: 20
Views: 928

Re: Push Rod Length: Shorter vs Longer

When your calculated push rod length falls between two standard measurements, do you go longer or shorter? Say I find 7.385" is ideal. So is it 7.375 or 7.40" ? This is a hydraulic roller with .575" lift via 1.6 rockers. With a hydraulic lifter it won’t matter. Buy the one you can get and send it.