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Search found 831 matches

by piston guy
Fri Mar 27, 2020 4:13 pm
Forum: Engine Tech
Topic: Unsure what to do with 0.0020" Main Clearance
Replies: 28
Views: 815

Re: Unsure what to do with 0.0020" Main Clearance

I would have Adney Brown at Performance Crankshaft in Detroit ( only another hour more) grind it . SUPER quality work. "Realistic" prices.
by piston guy
Fri Mar 27, 2020 1:37 pm
Forum: Engine Tech
Topic: Can a leaking exhaust valve cause piston galling?
Replies: 9
Views: 435

Re: Can a leaking exhaust valve cause piston galling?

One sided galling "could" be fuel wash.
by piston guy
Wed Mar 25, 2020 4:50 pm
Forum: Engine Tech
Topic: Wrist pin into the second land.
Replies: 15
Views: 756

Re: Wrist pin into the second land.

I had it with a .250 land and .150 pocket. Unless the head is milled , that usually works. You might be dealing with with more duration than a 270@ .050 solid roller.
by piston guy
Wed Mar 25, 2020 11:39 am
Forum: Engine Tech
Topic: Wrist pin into the second land.
Replies: 15
Views: 756

Re: Wrist pin into the second land.

Mark , I have done it before using pin buttons . "I" don't like it because we try hard to keep oil from migrating above the oil ring and putting the pin above the oil ring provides a pathway for oil to go above the oil ring easily. If you went to a 1.2x1.2 top and second with a .250 down top ring , ...
by piston guy
Fri Mar 20, 2020 11:00 am
Forum: Engine Tech
Topic: JE Pistons,when is hot "too hot"
Replies: 17
Views: 2725

Re: JE Pistons,when is hot "too hot"

It is but the information still applies to current engine operating conditions.
by piston guy
Thu Mar 19, 2020 11:38 am
Forum: Engine Tech
Topic: JE Pistons,when is hot "too hot"
Replies: 17
Views: 2725

Re:

Keith, all the pistons look good, no scuffing on skirts, rings all free, a couple of pistons have slight tan color under the domes in a small area.Couple of pins also have discolored only slightly. That is enough heat discoloration to lose 30+ points on hardness. The first color change is to a fain...
by piston guy
Thu Mar 19, 2020 11:30 am
Forum: Engine Tech
Topic: Diagnosing damage
Replies: 13
Views: 806

Re: Diagnosing damage

If it's only on the "plug side" , "I" would think fuel wash ( down side of the cylinder) was the problem . IF it is scuffed on both sides of the piston , clearance "went away" for some reason. Not crank flex. Others may have different opinions.
by piston guy
Fri Mar 13, 2020 11:25 am
Forum: Engine Tech
Topic: How much zddp
Replies: 72
Views: 4459

Re: How much zddp

In the mid 60's , I was lucky enough to get help from Valvoline and Crane cams. I was having bearing problems and reached out to Harvey about it . He suggested to "sell the Valvoline and BUY Kendall GT1" I did just that and my bearing issues went away. The "green" oil did cost me my Valvoline deal b...
by piston guy
Wed Mar 11, 2020 10:56 am
Forum: Engine Tech
Topic: How much zddp
Replies: 72
Views: 4459

Re: How much zddp

Mike, While cam manufacturers recommend ZDDP and cam lubes for flat lifter cam break in , after break in in is there a point where allot of additive isn't needed? "I" would think that after the lifters and lobes have "worn in" that the anti scuff ingredients could virtually go away. Besides migratin...
by piston guy
Tue Mar 10, 2020 4:37 pm
Forum: Engine Tech
Topic: Whats Your Definition Of a Engine Builder ??
Replies: 38
Views: 2245

Re: Whats Your Definition Of a Engine Builder ??

Thanks Bill , you are correct of course! I knew it was a ring deal. My grandfather had a certificate framed. His nickname was Doc so it must have been important when he got it. ( 30s or 40s)
by piston guy
Tue Mar 10, 2020 1:53 pm
Forum: Engine Tech
Topic: Whats Your Definition Of a Engine Builder ??
Replies: 38
Views: 2245

Re: Whats Your Definition Of a Engine Builder ??

One KEY factor here is engine development is constantly evolving BECAUSE of engine BUILDERS , not parts assemblers. Darrin Morgan doesn't have a PHD after his name but can TELL a PHD HOW TO PORT a HEAD!!!! Hastings "used" to offer a certificate called "Doctor of Motors' as some form of a customer co...
by piston guy
Mon Mar 09, 2020 12:09 pm
Forum: Engine Tech
Topic: Whats Your Definition Of a Engine Builder ??
Replies: 38
Views: 2245

Re: Whats Your Definition Of a Engine Builder ??

Anyone who buys the appropriate amount of tools can be an engine ''assembler". Others copy combinations built by others and call themselves engine builders. "To me" an engine "builder" doesn't "have" to be a world class machinist or be able to balance his on rotator. BUT he/she MUST be able to choos...
by piston guy
Fri Mar 06, 2020 11:39 am
Forum: Engine Tech
Topic: stock 289 rebuild/pistons
Replies: 15
Views: 980

Re: stock 289 rebuild/pistons

+1 Excellent description DCal. Cast , high silicon pistons are fairly brittle and cylinder pressure spikes exceed the strength of the thinner second land and break it. Forged high silicon pistons are better but the "most ductile" material is forged 2618. Drag race, Nascar , road race , nitrous , blo...
by piston guy
Thu Mar 05, 2020 3:46 pm
Forum: Engine Tech
Topic: stock 289 rebuild/pistons
Replies: 15
Views: 980

Re: stock 289 rebuild/pistons

Detonation broke the lands. If it was a design flaw all would have broken .
by piston guy
Wed Mar 04, 2020 11:58 am
Forum: Engine Tech
Topic: REBCO MACHINE STILL OPEN?
Replies: 3
Views: 729

Re: REBCO MACHINE STILL OPEN?

Yes he is still in business. He's been going to "school" to learn more about programming CNCs so he doesn't always answer the phone immediately.