Search results for query: *

Just looking for data points here. The question is what is the maximum acceptable lash closure rate rate (or lobe velocity) for when a solid lifter lash is taken up on the valve opening. This would also the rate for when the valve closes.) This would be measured in inches per degree. I have a...

Not Mopar, but I figure I'd get some decent thoughts here. I have some oddball 4-banger Arias forged pistons here, and the pin bores are at .912". Got some JE 2 layer spirolox that fit the .042 width of the pin lock grooves just fine. And the .927" diameter sizing of these spirolox should be OK...

Hey all, I am taking a long shot that someone in this knowledgeable crowd might have some old Arias piston experience. I have a set of old Arias forged pistons that are probably 15-20 years old, that I am planning on putting in a block for street use (not a Mopar, but Opel 1.9L). I have had...

Wanting to see if any of you guys know of a shop that can offset grind cranks, re-harden and balance. Mid-Atlantic preferred but can ship to a good shop. Not for Mopar..... Opel 4 cylinder 1.9L forged crank. I plan to offset grind the rod journal to move center outward by .125", for .250" longer...

Not a super important topic.... So I was on another auto forum (where there is less motor expertise than here), and in response to my comment to not ever put used lifters on another cam, this was posted in support of re-using used lifters on another cam. "The reality is that you do risk a...

Another silly question: How much can be cut from the OD of a 2.02" valve head? Similarly, what is a good minimum width for the seat for moderate street use? The reason to ask: I'm trying to stuff AL heads onto a bored 273 block (like Promaxx or Edelbrock) and am seeing a possible issue with...

I never paid attention to this before, but with the oil pressure issues reported on this forum, I begun wondering how much lifter bore wear is a factor, that folks are just not aware of. So I measured a 273 block here; this is an approximate 100k mi engine, original, with cylinder bore wear no...

I have read up in the Clevite-Mahle catalog about their anti-wear coatings option on the 77 series bearings; sounds nice. But paying $200 for a set of the -K suffixed mains for the intended use was a bit steep LOL. So a set of MS540H and CB481HN bearings (early LA's: 273 and 340) were ordered...

Just an update from this prior thread on weighing rod ends with a low cost home shop jig: Low Cost DIY Rod Weighing Setup A triple beam mechanical scale has been tried in place of the cheap electronic scale, and STILL showed repeatability issues related to side loading on the scale. This...

Ironmike mentioned it being winter and his brain working overtime on gearhead stuph.... same thing here LOL Dartfreak75's long decision making process led to this little project, and we've PM'd back and forth on solutions. He provided some of his 318 piston-rod assemblies for weighing to get a...

FWIW…. Pishta and I have been setting up low cost, home-shop weighing equipment for big and small end rod weights. This is a summary of one setup that is simple to build and repeatable. It is not the ultimate in accuracy but will measure end weights to a few grams tolerance, which is around 10...

It's thinner than I thought at the bottom of the cooling jacket in a couple of SBM blocks checked, while planning some bore notching at the bottom of the bores for rod bolt clearance with a stroker crank, like pictured in this article: This 436ci Small-Block Mopar Makes Big-Block Power On Pump...

I'm working on a pet project, and need a few 318 piston pins, to see if there is an easy way for anyone interested to save some $$ on a basic 318 build. If you have a few laying about and can spare them, PM me. I'll pick up the shipping tab. Tnx!

FWIW...... Just another of those little surprises. Got my 2nd set of SCAT I beam rods, PN 2-ICR6123-2124. When I placed the order, I requested that all the sets on the shelf at Summit be checked, and could I please get the set with the lightest big end weights? Well, they very nicely complied...

Nothing earth shattering here, but this was interesting and also perplexing: As part a little project to modify pin weights, a spread sheet was set up to compute wrist pin weights from volume and material density. EDITED to correct for a spreadsheet error. The first check of this spreadsheet...

For anyone interested, as far as a data point for the even-ness of factory balance work, all 8 pistons and rods, etc., from a '68 273 were disassembled, and all the individual parts weighed to compute the corresponding bobweights, including big and small end rod weights. There are the original...

I think I know the answer.... but thought I'd ask. Any aluminum heads out there with 1.92" intake valves? The reason is to to put a set on a slightly bored 273 block, and the 2.02" valves may require too much notching.

I'm stumped on this one.... I was perusing the Mahle/Clevite bearing catalog today and ran across 3 different PN's for the non-360 main bearing sets . The descriptive difference is this: MS963V: Engines with 3.305/3.375" main bearing flange OD; listed for 273/318/340 MS1344V: engines with...

For those of you who have them, what brands/models do you have? And do you have a machine shop? I may get one, both for checking wall thickness of tubing in the field for our regular work, and would also like to measure cylinder walls. But I don't run a shop so would not use it very often, so...

This is just some 'FWIW' info that might be of mild interest to this pretty smart/active group of gearheads. I've read that different strokes and rod lengths change the angles at which peak displacement occur, etc., and that might be a factor in cam profiles, lobe angles, etc. So some...

Question for the machinist types: Can piston pins be pressed into bronze bushings in the rods, with the bushing honed for an appropriate interference fit, or will it just damage the bushing to try that? Or installed by heating the rod end? And, if you can do it, will it hold or will the softer...

My son and I finally got the new Hughes rockers installed and fired up about 3 weeks ago, and after about 3 seconds, there came a serious BANG BANG BANG BANG...... that was at engine speed. It sounded like a piston hitting the head or a valve. A quick shut down, and some diagnosis (when we...

Sometimes you take a chance and it does not pan out. We were replacing an erratic lifter last night and pulled the rockers to inspect and found this wear on the rockers shafts after approximately 1000 street miles. The needles are digging into the shafts big time; this pix is one of the worst...

Just one of those engine stories here.... My son's 340 started having one of the new Crane hydraulic flat tappet lifters ticking in less than 1k miles. It quickly progressed to where it would reeeeeally tick badly for a few minutes on start up, and would seemingly get soft when the oil got good...

My son and I are looking for a PCV valve that restricts flow more at a lower-then-stock level of idle vacuum. We currently have the standard Mopar 60's era PCV valve like from a SBM, which is an all metal, 90 degree one. Looking at the PCV valve plunger when the engine is at idle, it is not...

Just FWIW.... here is a diagram of the oil flow from the LA SBM oil system up to the rocker shafts. It shows passage diameters in inches and flow areas in square inches. There is data here for the stock setup and also for the PRW PQx aluminum rocker setup (which is what I was working on at the...

My son is in shock that the 340 is on the hoist today! It has indeed been a bit a long haul, what with the unexpected machinist issues, but it's lookin' good hanging on the chain. But then, as Gene Shepherd would say: "Just when all is right with the world, just when we reach the zenith of...

Not sure how much this post is worth, as most who are skilled enough to do this sort of thing can figure it out or already know. So purely FWIW: We needed custom length pushrods for our 340 build and decided to go with Comp Cams field cut and assembled pushrods instead of having someone else do...

Here is another thread for the FWIW series. We primed our new 340 oiling system, and the oil just slowly flows out of the existing PRW AL rocker side clearance and oil hole to the adjuster/p-rod. No evidence of any spray that will reliably get oil over onto the valve tip, the spring, or the...

Just another FWIW note: We just primed our 340 with a Crane cam, and could not get oil to the rockers despite setting the angles as below (thanks to Tony for this info): - Turn the motor to 90* before top dead center coming up on #1 compression. The pass. side rockers should get oil. - Turn...