C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

4 bolt vs 2 bolt main

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Old Jul 22, 2006 | 03:26 AM
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Originally Posted by rodj
Vortec L31 4 bolt block the same as L98 roller.That is what I am using for my race 383 build up
Mid 90s truck blocks-4 bolt roller.

Actually, a studded 2 bolt block is plenty strong for most street abuse.
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Old Jul 22, 2006 | 03:51 AM
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Originally Posted by bogus
those pictures are worth a thousand words...

the angled bolt of the splayed cap will retain the bearing cap better, and the cross bolt, well, gee... that's killer stout. think 427 side oiler.
I'm surprised that a spring chicken like yourself knows what a side oiler is. I'll bet many here think you're talking about a 427 Chevy. But you're talking about someone who made a 427 several years before Chevrolet did. They also used cross bolts on their 406 blocks in '62-'63 until it was replaced by the 427 in mid-year '63.
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Old Jul 26, 2006 | 03:41 PM
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same question but using a big block?
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Old Jul 26, 2006 | 04:04 PM
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Originally Posted by cemittar
same question but using a big block?
same answer.
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Old Jul 26, 2006 | 04:05 PM
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Originally Posted by Corvette Kid
I'm surprised that a spring chicken like yourself knows what a side oiler is. I'll bet many here think you're talking about a 427 Chevy. But you're talking about someone who made a 427 several years before Chevrolet did. They also used cross bolts on their 406 blocks in '62-'63 until it was replaced by the 427 in mid-year '63.
eh... it's amazing what I know at times... Stuns even me.

Now, I don't know much about the old 406 blocks. I didn't know they were side bolted. Strong as stink, tho.
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Old Jul 26, 2006 | 08:36 PM
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Originally Posted by Corvette Kid
I'm surprised that a spring chicken like yourself knows what a side oiler is.
The old FE boat anchors? 1957 to ?, many years later. Betcha can't list all the displacements the FE came in. I can't either. The potential was in the 385 series.

RACE ON!!!
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Old Jul 26, 2006 | 08:49 PM
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Originally Posted by cuisinartvette
Actually, a studded 2 bolt block is plenty strong for most street abuse.
thats what i told my builder to do.
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Old Jul 26, 2006 | 10:08 PM
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Originally Posted by CFI-EFI
The old FE boat anchors? 1957 to ?, many years later. Betcha can't list all the displacements the FE came in. I can't either. The potential was in the 385 series.

RACE ON!!!
The 292 and 312 weren't part of the FE, were they? Or were they the Y-Block?

lemme think... there was a 330 something, then the 352 and the 390, the 427... I don't remember what came after that.

I agree, the FE wasn't that great, but I feel the 427 did redeem the motor a bit.
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Old Jul 27, 2006 | 11:54 AM
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The 239, 272, 292, 312, and 368, were the original OHV, "Y" blocks, that came out in 1954. The first car FE engine was the 332. I think there may have been a 330 for trucks. I'm not sure, now, if the FE engines started in 1957 or '58. I'm thinking '58 even though I said '57. The sizes *I* can recall include the 330(?), 332, 352, 360, 361, 383, 390, 391, 406, 410, 427, and 428.

RACE ON!!!
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Old Jul 27, 2006 | 12:13 PM
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Wow... they had even more fine tuned varieties of the FE than I realized.

The FE came out with the Edsel... the Ford-Edsel engine family...

The Y-Block was only ok... reliable, but not super hot.

I still think the first great modern V8 Ford had was the 427... but the first truly special V8 was the 289. The 260 was nice, but just a little small. The 302 was simply stellar. Them suckers can REV.

The 351C is cool, but rather ancient today... the 351W out does it...

I didn't realize the 360 was an FE engine. I never knew where it fit in. I think it was a truck engine, cause that's the only place I ever heard of them showing up.

I think we are both getting mixed up with the 332. I know there was a a smaller motor, but I think the 332 was it.

On last trivia question... someone once told me that Ford changed the 460 in 1969. The engine stayed the same size, but was all new and shared no parts. Do you know about this? I never found any documentation to support it... but I never spent a lot of time on it, either.

Oh, and where does the 429 fit into this mess?

Last edited by bogus; Jul 27, 2006 at 12:16 PM.
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Old Jul 27, 2006 | 02:23 PM
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429 (Excluding the Boss 429, obviously) and 460 are the same family. Don't know anything about the 69 460 change though.
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Old Jul 27, 2006 | 02:29 PM
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Interesting. Didn't the Boss 429 share the same block as the 429? or was that different, too?

It just blows me away as to how ineffiecent the manufacturers were.

I mean, back in the day, Buick, Pontiac and Olds shared an engine family. Chevy did their own thing, and Caddy had their own thing (which I think may have been a development of the BOP motor, but I am not sure).

I firmly beleive that the latest model, have a few of each size, makes the most sense. It also allows for the best of the best to be focused on just those engines.

Ford has it with the Romeo V8 (the 4.6, 5.0, 5.4 and the V10). GM is doing it with the LSx architecture, and doing it globally (Australia). DC isn't quite there yet, but the Hemi is Mopar wide - car and truck - and they have one or 2 I4s for various uses.

It just strikes me as being so costly to have all those engine families... and just robs the company of research $$.
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Old Jul 27, 2006 | 03:09 PM
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This is a big debate on many boards. Splayed, Vs 2bolt vs 4bolt. Everyone makes a good argument but no conclusion is ever made. I went with a 4 bolt.
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Old Jul 27, 2006 | 03:44 PM
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I have a simple theory on this subject - 4 bolt will never hurt you. It can only help.

If you have the engine apart, why not?
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Old Jul 27, 2006 | 09:18 PM
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Originally Posted by bogus
The Y-Block was only ok... reliable, but not super hot.
I had a "Y" block, back in the '60s that would clean the clock of any semi stock L98.

Originally Posted by bogus
I still think the first great modern V8 Ford had was the 427... but the first truly special V8 was the 289. The 260 was nice, but just a little small. The 302 was simply stellar. Them suckers can REV.
The 221 was the first of the Windsors; then the 260, 298 (289), 302, and 351. The Boss 302 was just a Cleveland headed Windsor engine. The bore and stroke of the 302 is the same as the Chevy 302. They revved pretty good, too.

Originally Posted by bogus
The 351C is cool, but rather ancient today... the 351W out does it...
The Cleveland's were after the Windsor. Then came the "Modifieds", the "M" motors.

Originally Posted by bogus
I didn't realize the 360 was an FE engine. I never knew where it fit in. I think it was a truck engine, cause that's the only place I ever heard of them showing up.
The 360 was a pick up engine. The 390 was both a car and light truck engine. The 361 and the 391 were heavier truck engines.

Originally Posted by bogus
I think we are both getting mixed up with the 332. I know there was a a smaller motor, but I think the 332 was it.
There WAS a 332, but I'm pretty sure there was a 330 truck, too.

Originally Posted by bogus
On last trivia question... someone once told me that Ford changed the 460 in 1969. The engine stayed the same size, but was all new and shared no parts. Do you know about this? I never found any documentation to support it... but I never spent a lot of time on it, either.
Ford was never easy, like GM. I don't know the particulars of the 460 changes. I find it haed to believe it shared NO parts, but with Ford, little would surprise me. I do know that somewhere in the 70's the timing sets for the 460s were all made retarded.

Originally Posted by bogus
Oh, and where does the 429 fit into this mess?
The 429 is a destroked 460. They are the "385" Series engines, not FE series.

RACE ON!!!

[EDIT] Typo correction

Last edited by CFI-EFI; Jul 27, 2006 at 09:40 PM.
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Old Jul 27, 2006 | 09:35 PM
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Originally Posted by bogus
It just blows me away as to how ineffiecent the manufacturers were.

I mean, back in the day, Buick, Pontiac and Olds shared an engine family. Chevy did their own thing, and Caddy had their own thing (which I think may have been a development of the BOP motor, but I am not sure).
No! No! No! GM never shared engines before 1977, when some guy who bought an Olds for it's Rocket engine discovered it was 350 Chevy. There was a 350 Chevy (of course), a 350 Buick, a 350 Olds, and a 350 Pontiac. The only thing that interchanged between the 4 was the oil. The same is true of the 454 and 455s. Each was proprietary to it's car manufacturer. The Buick, Olds, Pontiac, and Cadillac, shared bell housing bolt patterns and therefore, transmissions. Chevy was the orphan, there. Motor mounts were NOT interchangeable. GM did NOT share engines, even though they shared engine sizes.

RACE ON!!!
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Old Jul 27, 2006 | 10:16 PM
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I didn't realize that. I was under the impression that the olds, Buick and Pontiac's were sorta based on the same block...

then again, the Pontiac 400 was different than the Olds 403.

I will reiterate, it is most inefficient.

I remember when the olds 350/Chevy 350 stink occurred. A friends dad had just bought a brand new Olds wagon. Full size Cutlass wagon. 1977 or so, I don't remember the year, but he was PISSED when he learned the olds had a Chevy in it. IIRC, this resulted in a class action law suit that resulted in GM giving people money.
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Old Jul 27, 2006 | 10:37 PM
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I'm still waiting to see those pictures of a trashed 2 bolt main cap with ARP studs. And waiting, and waiting.....

My freind went this route, he bought a cheap F body LT1 2 bolt to build his 383, we installed the ARP bottom stuff and it's holding together just fine. Frankly I don't think the F body guys worry about it eaither even with spray.
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Old Jul 27, 2006 | 10:53 PM
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Originally Posted by CFI-EFI
No! No! No! GM never shared engines before 1977, when some guy who bought an Olds for it's Rocket engine discovered it was 350 Chevy. There was a 350 Chevy (of course), a 350 Buick, a 350 Olds, and a 350 Pontiac. The only thing that interchanged between the 4 was the oil. The same is true of the 454 and 455s. Each was proprietary to it's car manufacturer. The Buick, Olds, Pontiac, and Cadillac, shared bell housing bolt patterns and therefore, transmissions. Chevy was the orphan, there. Motor mounts were NOT interchangeable. GM did NOT share engines, even though they shared engine sizes.

RACE ON!!!
Talk about hijacking a thread......

I believe Pontiac used chevy 350's in some of their cars bound for Canada many years before 1977.
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Old Jul 27, 2006 | 11:19 PM
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I ran the old L-98 to just over 570HP on the blower with no issues with crank movement or any signs of failure.

When I added the 4" stroke crank and larger everything, I did move to splayed caps and was well needed for the added HP. I have had no issues to date. Knock on wood.

Aaron
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