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Search found 1399 matches

by Dan Timberlake
Wed Jan 25, 2023 12:41 pm
Forum: Engine Tech
Topic: OOT - Cast crank making
Replies: 15
Views: 781

Re: OOT - Cast crank making

At 14:58 ?
Does kind of look that way .
scat crank e.PNG
by Dan Timberlake
Tue Jan 24, 2023 12:40 pm
Forum: Engine Tech
Topic: Clover Lapping Compound
Replies: 32
Views: 907

Re: Clover Lapping Compound

"non-embedding compound" The late great Gordon Jennings mentioned that in some of his tech articles. I figured that was having fun with the new guys, like a left handed monkey wrench, bucket of steam, gasket stretcher, snipe hunt, etc. I think any abrasive will embed in aluminum or copper, maybe a l...
by Dan Timberlake
Sun Jan 22, 2023 9:27 am
Forum: Engine Tech
Topic: Ongoing Detonation Issue Help!!!!!
Replies: 79
Views: 2909

Re: Ongoing Detonation Issue Help!!!!!

In Chevy's 1958 SAE paper about the new 9.5 to 1, 4 bbl 348 passenger car engine they showed the best ignition timing for the 348 vs some 283 engine up to 4500 rpm or so.
by Dan Timberlake
Sat Jan 14, 2023 10:37 am
Forum: Engine Tech
Topic: skirt RA=975
Replies: 5
Views: 437

Re: skirt RA=975

Like this ? https://www.vintage-mustang.com/attachments/img_1314-jpg.742198/ TRW's race pistons had a carefully contoured wavy skirt profile back in the 70s. I thought it made sense for for scuff resistance, providing plenty of lubrication and at lest theoretically more likelihood for hydrodynamic l...
by Dan Timberlake
Sun Jan 08, 2023 9:34 am
Forum: Engine Tech
Topic: Rod bolt tightening
Replies: 37
Views: 1813

Re: Rod bolt tightening

For my money Getting the absolute most out of every fastener is not time or money well spent. Not every application requires torque-to-yield. My boss said last week that the (aluminum) torx fasteners that hold on his BMW's oil pan are torque to yield. In my head I said WTF!!!! . For decades HoloKrom...
by Dan Timberlake
Sun Nov 27, 2022 11:10 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Neat one came in for a build
Replies: 12
Views: 1300

Re: Neat one came in for a build

.15 deck clearance ? I wonder if they are 350 pistons.

CHEVROLET 5.7L/350 Pistons. Compression Height (in.): 1.565 in.
CHEVROLET 5.4L/327 Pistons. Compression Height (in.): 1.654 in.
by Dan Timberlake
Wed Nov 09, 2022 12:27 pm
Forum: Engine Tech
Topic: BBC 427 header size?
Replies: 23
Views: 1096

Re: BBC 427 header size?

"back to back to back" The re-test of the baseline condition is usually hard to come by. Time, expense, excitement over some positive improvements. But, but really adds some to the confidence in all the test the results. Some Standards have requirements to test repeatability and record the results a...
by Dan Timberlake
Sun Nov 06, 2022 11:41 am
Forum: Engine Tech
Topic: crankshaft balance tolerance
Replies: 14
Views: 881

Re: crankshaft balance tolerance

As others said, in the olden days the total R & P assembly weight or the con rod total weight potentially hide some pretty big differences is recip and rotating weight.
by Dan Timberlake
Sun Nov 06, 2022 11:01 am
Forum: Engine Tech
Topic: Well if this doesn't beat all
Replies: 24
Views: 1195

Re: Well if this doesn't beat all

"I have never seen a Holley 25 run bad on anything"HOLLEY STRIP DOMINATOR INTAKE - CHEVY SMALL BLOCK V8


Part # 300-25 ?? Strip Dominator Intake Manifold 1957-1986 262ci-400ci, 1987-later with Aluminum Heads
by Dan Timberlake
Thu Oct 20, 2022 12:31 pm
Forum: Engine Tech
Topic: Goodson PRK-99 epoxy application procedure
Replies: 8
Views: 432

Re: Goodson PRK-99 epoxy application procedure

I wonder if an aluminum filled epoxy would have a better matched thermal expansion rate.
by Dan Timberlake
Mon Oct 17, 2022 12:47 pm
Forum: Engine Tech
Topic: Anti Reversion Chamber on hexaust
Replies: 6
Views: 624

Re: Anti Reversion Chamber on hexaust

https://en.wikipedia.org/wiki/Tesla_valve

"It has also been shown that the device works better with pulsatile flows."
by Dan Timberlake
Mon Oct 03, 2022 12:50 pm
Forum: Engine Tech
Topic: SBC - main bearing clearance question
Replies: 64
Views: 3260

Re: SBC - main bearing clearance question

To me " no oil pressure " means zero psi. Was the shop's "no oil pressure" when priming at room temperature? Or at the first start up at room temperature. I don't believe An extra .0005" of rod and main bearing clearance by itself would change the running oil pressure by even 1 psi on a typical iron...
by Dan Timberlake
Fri Sep 09, 2022 12:56 pm
Forum: Engine Tech
Topic: Looking for some Help...SBC Oil fouling plug
Replies: 106
Views: 3853

Re: Looking for some Help...SBC Oil fouling plug

Looks like all the sealing must be done on the threads.
by Dan Timberlake
Thu Sep 01, 2022 12:36 pm
Forum: Engine Tech
Topic: Does quench affect power?
Replies: 318
Views: 12724

Re: Does quench affect power?

US OEM tricks/designs to reduce emissions in the early days were often aimed at reducing unburned hydrocarbons. Wide open piston to head clearance and even beveled piston domes supposedly reduced nooks and crannies available for hydrocarbons to hide in and avoid burning. https://cdn11.bigcommerce.co...