LS VS Cleveland

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Post  IDT-572 on February 11th 2019, 4:37 pm

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Post  cletus66 on February 11th 2019, 5:30 pm

Very interesting info. I've been told that a motor doesn't know what name is on its valve cover. Must be true.
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Post  2 wicked on February 11th 2019, 6:51 pm

Had a 351c 2 v with a 500 Holley BBL I put in a 75/76 Gran torino. Back in highschool, beat all the Chevy boys back then with hopped up ABC's in there Nova's and Camaros. That Cleveland was stock except carb. Wish I had it back!!!

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Post  rmcomprandy on February 11th 2019, 7:04 pm

Someone is actually making an attempt to compare a Canted, splayed valve head to a non-canted inline valve head ...
REALLY ???

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Post  DaveMcLain on February 11th 2019, 7:07 pm

At first I didn't think he meant the new "LS" but rather the old LS big block Chevy then I read further. His comparison makes zero sense.

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Post  jbozzelle on February 12th 2019, 10:52 am

That's like comparing apples to a concrete truck...

Zero sense...

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Post  lvhdude on March 15th 2019, 8:20 am

I think the OP is looking at a comparison of the Cleveland 4 bbl head to the LS7 427 Cheby BB head. And the HP and air flow of those two engines at peak RPMs.

I always thought they looked similar, as does the Ford 385 series heads.



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Post  rmcomprandy on March 15th 2019, 9:34 am

cletus66 wrote:  I've been told that a motor doesn't know what name is on its valve cover.  Must be true.  

You Bet ...

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Post  gt350hr on March 15th 2019, 11:30 am

That is some of the most ridiculous information I've ever seen. The only correct thing is that the bolt spacing is the same.
    Comments like the cam is almost the same as a 351CJ ( hydraulic flat tappet)  as an LS7 ( hydraulic roller) , and the ports are almost the same size as a 351C4V are the ramblings of someone who is clueless. This is all besides the canted vs non canted 8.5* versus 15( or 12) degree that Randy mentioned already. And since when does George have a "flow bench calibrated" eye? Legend in his own mind for sure.

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Post  BBFTorino on March 15th 2019, 11:06 pm

lvhdude wrote:I think the OP is looking at a comparison of the Cleveland 4 bbl head to the LS7 427 Cheby BB head. And the HP and air flow of those two engines at peak RPMs.

I always thought they looked similar, as does the Ford 385 series heads.



The comparison is not with the Chevy big block head, but rather, the modern LS series cylinder head. He is comparing flow rates and such.
I think a Cleveland with a much improved head like the CHI or AFD heads would still make more power than the LS 7 but probably not much, as the LS series motors have 40+ years of technology advancement on the small block Ford.

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Post  gt350hr on March 18th 2019, 2:04 pm

George reads books and looks at pictures. I doubt he has ever run a flow bench and I'm sure he has never built a Chevy LS. BUT he's an authority!!!!

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Post  427John on March 28th 2019, 9:37 pm

I wonder if he believes BBC and 429-460 heads are also copies of Cleveland heads?

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