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Search found 1299 matches

by Mark O'Neal
Wed Jan 13, 2021 5:09 pm
Forum: Engine Tech
Topic: Piston Design Questions
Replies: 38
Views: 1027

Re: Piston Design Questions

Run the flat top and a .080 gasket. I take it then that you've little concern for an excessive gap between the piston and the head? Seems the conventional thinking is that it deserves attention. This is part of the reason for my wanting to stay away from a full dish as opposed to something with a D...
by Mark O'Neal
Fri Jan 08, 2021 12:46 pm
Forum: Engine Tech
Topic: Piston Design Questions
Replies: 38
Views: 1027

Re: Piston Design Questions

Run the flat top and a .080 gasket.

Bob's your uncle.
by Mark O'Neal
Wed Dec 16, 2020 1:57 am
Forum: Engine Tech
Topic: Bryant crankshaft. likely been dropped. need advice.
Replies: 16
Views: 1355

Re: Bryant crankshaft. likely been dropped. need advice.

dannobee wrote: Thu Dec 10, 2020 11:03 am And if you've ever witnessed a crankshaft being "straightened," you wouldn't be fearing anything UPS could do.
LOL...I had them break the nose off a Cola crank a lot of years ago. No idea how they managed it.
by Mark O'Neal
Wed Dec 02, 2020 2:50 am
Forum: Engine Tech
Topic: Single plane vs. dual plane intake. How to compare?
Replies: 70
Views: 3362

Re: Single plane vs. dual plane intake. How to compare?

In general the single plane will give you higher peak HP, while the dual plane will give you higher average HP.
by Mark O'Neal
Sat Nov 21, 2020 3:51 am
Forum: Engine Tech
Topic: Piston pin "end play" ? How much is ok ??
Replies: 19
Views: 965

Re: Piston pin "end play" ? How much is ok ??

Chipster wrote: Fri Nov 20, 2020 9:10 pm ?? Don't round lock need a chamfered end on the pin.
Yes.
by Mark O'Neal
Sun Nov 15, 2020 1:43 am
Forum: Engine Tech
Topic: BBC 427 Pistons
Replies: 17
Views: 886

Re: BBC 427 Pistons

Milling the heads and block decking both REDUCE piston to Valve clearance.. You want avoid that on BB Chevys. Where do you come up with this stuff? Neither is an issue here, especially in a mild pump gas build. You couldn't pay me to use an Icon/KB piston. OP, RaceTec can easily do a custom in Auto...
by Mark O'Neal
Sun Nov 15, 2020 1:34 am
Forum: Engine Tech
Topic: SBF HFT lifters
Replies: 12
Views: 754

Re: SBF HFT lifters

I have one set left of the Johnson lifters (from 2015) that we used in all of our builds.
by Mark O'Neal
Fri Nov 06, 2020 4:59 pm
Forum: Engine Tech
Topic: Balancing Experts....
Replies: 12
Views: 752

Re: Balancing Experts....

You guys could complicate buttered bread.
by Mark O'Neal
Thu Nov 05, 2020 5:27 pm
Forum: Engine Tech
Topic: Balancing Experts....
Replies: 12
Views: 752

Re: Balancing Experts....

I have a question for the engine balancing experts out there. I have a SBC 350 that I'm putting fresh rod bearings in. It was balanced with a Federal Mogul "Tri-Metal" bearing. New bearings going in it are King Alecular "Bi-Metal" bearings. Although I'm not really worried about it at all, my curios...
by Mark O'Neal
Sat Oct 24, 2020 9:39 pm
Forum: Engine Tech
Topic: piston install
Replies: 13
Views: 682

Re: piston install

Won't make more power. Won't make less either.
by Mark O'Neal
Thu Oct 08, 2020 7:42 pm
Forum: Engine Tech
Topic: Worn rings, end gap and blowby
Replies: 32
Views: 1354

Re: Worn rings, end gap and blowby

David Redszus wrote: Tue Oct 06, 2020 1:05 pm
Mark O'Neal wrote: Mon Oct 05, 2020 5:23 pm Had a guy will a BBF engine in a rail.

Beginning of the season, worst cylinder leaked 7%. Ran 7.40s

End of season, worst cylinder leaked over 70%. Ran 7.40s.
So does that mean it was grip limited? :D
or sumpin"
by Mark O'Neal
Thu Oct 08, 2020 7:41 pm
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1983

Re: Top piston ring gap - whats really required?

If that’s true, why not leave the ring out altogether? The. It won’t butt for sure. It's your motor. I am all in favor of you doing whatever you want to do. However the subject matter, and I realize that I am relying on English comprehension here, is ring end gap. At no point was the subject change...
by Mark O'Neal
Thu Oct 08, 2020 7:40 pm
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1983

Re: Top piston ring gap - whats really required?

Does alky vs gasoline change the desired gap? Measuring static leak has nothing to do with what the engine is doing at 8,000 rpm with the cylinder going oblong, the piston flexing like a 2 minute softboiled egg and traveling at Mach 6, the rod whipping like a piece of pasta, and the crank doing wha...
by Mark O'Neal
Wed Oct 07, 2020 8:55 pm
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1983

Re: Top piston ring gap - whats really required?

Does alky vs gasoline change the desired gap? EGTs are what, in the 1,200 range. So, probably, but why? Still better to have too much than too little. Measuring static leak has nothing to do with what the engine is doing at 8,000 rpm with the cylinder going oblong, the piston flexing like a 2 minut...
by Mark O'Neal
Wed Oct 07, 2020 8:46 pm
Forum: Engine Tech
Topic: Top piston ring gap - whats really required?
Replies: 34
Views: 1983

Re: Top piston ring gap - whats really required?

There is only one rule that counts. Don't let the ring ends butt. Past that everything is opinion. If that’s true, why not leave the ring out altogether? The. It won’t butt for sure. It's your motor. I am all in favor of you doing whatever you want to do. However the subject matter, and I realize t...