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Search found 226 matches

by turbo camino
Wed Jul 15, 2020 11:48 pm
Forum: Engine Tech
Topic: Cheap SBC aluminum heads..
Replies: 24
Views: 672

Re: Cheap SBC aluminum heads..

I'd like to see pictures, of the actual items, taken by an actual flesh and blood human, because the ebay ads all have either stock photos recycled over and over from other China-based drop shippers, or else they're something like Solidworks renderings and not even real photos of a real physical obj...
by turbo camino
Wed Jul 15, 2020 8:28 pm
Forum: Engine Tech
Topic: Cheap SBC aluminum heads..
Replies: 24
Views: 672

Re: Cheap SBC aluminum heads..

Don't worry, this whole pictures-on-the-internets thing is just a momentary fad, it'll never last.
by turbo camino
Sun Jul 12, 2020 6:18 am
Forum: Engine Tech
Topic: ? intake mounting may affect crank bore alignment ?
Replies: 17
Views: 479

Re: ? intake mounting may affect crank bore alignment ?

OK, I am starting to figure it out. With the old-style intake bolt orientation, overtightening the bolts (all, equally) would tend to pull the cylinder heads in closer together, but the Vortec with its vertical bolts, overtightening would make the manifold act as a wedge being driven down between th...
by turbo camino
Sat Jul 11, 2020 2:53 pm
Forum: Engine Tech
Topic: ? intake mounting may affect crank bore alignment ?
Replies: 17
Views: 479

Re: ? intake mounting may affect crank bore alignment ?

And... I'm not advocating ignoring the tightening instructions. If they'd said "Due to the failure-prone gasket design, following the installation instructions is critical", I'd have no argument at all with that. Has anyone ever found a L31 with burned up bearings because one or two of the intake bo...
by turbo camino
Sat Jul 11, 2020 2:40 pm
Forum: Engine Tech
Topic: ? intake mounting may affect crank bore alignment ?
Replies: 17
Views: 479

Re: ? intake mounting may affect crank bore alignment ?

I really do realize that things can move in unexpected ways. I am having a hard time seeing this one though. The OEM lower intake is long and wide and relatively thin and flat - maybe 4" at the thickest? - and would seem to be able to pretty easily make a corner-to-corner twist. The block is, yes, a...
by turbo camino
Sat Jul 11, 2020 9:34 am
Forum: Engine Tech
Topic: ? intake mounting may affect crank bore alignment ?
Replies: 17
Views: 479

Re: ? intake mounting may affect crank bore alignment ?

I realize everything is flexible if you have the right measuring instruments, but seriously, how much can you twist a SBC block using only eight little 5/16" intake bolts? I mean, how much do the main bearing bores move around when you drive over a speedbump and chassis flex is transmitted through t...
by turbo camino
Thu Jul 09, 2020 7:27 pm
Forum: Engine Tech
Topic: Gen 1 SBC oil filter bypass
Replies: 22
Views: 704

Re: Gen 1 SBC oil filter bypass

This filter bypass can't cause higher pressure than what the pump pressure relief allows, even if the filter is collapsed and completely blocked.
by turbo camino
Thu Jul 09, 2020 7:14 pm
Forum: Engine Tech
Topic: ? intake mounting may affect crank bore alignment ?
Replies: 17
Views: 479

Re: ? intake mounting may affect crank bore alignment ?

Breaking News: There are lots of copy errors in GM, and other, service manuals. That reads like a bit of text that got pasted into somewhere it didn't belong.

For example, according to the ECM connector pinout in the GM manual a '06 GTO only has seven ignition coils.
by turbo camino
Thu Jul 09, 2020 4:45 pm
Forum: Engine Tech
Topic: Gen 1 SBC oil filter bypass
Replies: 22
Views: 704

Re: Gen 1 SBC oil filter bypass

The filter will not explode, the pump internal pressure relief will still limit max system pressure just like it always did. What happens is, if the filter area is too small to flow the full volume when the oil is cold and thick, the paper collapses and tries to escape thru the outlet. At that point...
by turbo camino
Wed Jul 08, 2020 11:07 am
Forum: Engine Tech
Topic: Gen 1 SBC oil filter bypass
Replies: 22
Views: 704

Re: Gen 1 SBC oil filter bypass

I've done it, but only when the giant 2-qt filter could be used. PF932 I believe.
by turbo camino
Mon Jul 06, 2020 8:06 pm
Forum: Engine Tech
Topic: "L98 valve spacing"
Replies: 22
Views: 692

Re: "L98 valve spacing"

As to the heads being weak, I know my one set is only a single data point, but they survived a 275 shot (and the trans output shaft didn't!) back in the day and they haven't had to be removed since it was put together from spare parts, more than 20 years ago now. I got the bare castings for I think ...
by turbo camino
Mon Jul 06, 2020 2:33 am
Forum: Engine Tech
Topic: "L98 valve spacing"
Replies: 22
Views: 692

Re: "L98 valve spacing"

The original question was "what does 'L98 valve spacing' mean?", not "what's the best value in SBC cylinder heads these days?" It's maybe a confusing coincidence that I do already own a set of '113 heads, but these happen to be in good shape, on a running engine, not planning to do any more work on ...
by turbo camino
Sun Jul 05, 2020 10:38 am
Forum: Engine Tech
Topic: "L98 valve spacing"
Replies: 22
Views: 692

Re: "L98 valve spacing"

bill jones: Thank you!

enigma57: Does AFR sell any heads for less money than the free '113s I already own?
by turbo camino
Sat Jul 04, 2020 7:50 am
Forum: Engine Tech
Topic: "L98 valve spacing"
Replies: 22
Views: 692

Re: "L98 valve spacing"

Well I feel, not better, but I guess less bad, about not being able to find anything in my previous searches.
by turbo camino
Fri Jul 03, 2020 9:39 am
Forum: Engine Tech
Topic: "L98 valve spacing"
Replies: 22
Views: 692

Re: "L98 valve spacing"

Cast# 10088113. Also used on the ZZx crate motors.