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Re: Vintage small block hi-rises...good or bad?
[Re: 69/70 Plymies]
#2526567
07/24/18 07:35 PM
07/24/18 07:35 PM
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Joined: Aug 2006
Posts: 2,537 God's Country Maryland
GODSCOUNTRY340
master
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master
Joined: Aug 2006
Posts: 2,537
God's Country Maryland
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That cast iron intake is a very good intake, came on a '70 340. Don't waste your time with the offy dual-port. An Edelbrock LD4B is the 318 version of an LD340 intake, try to find one of those. Also good small block intakes are the Performer RPM, Torker II and the Holley Strip Dominator. DO NOT use a Torker 340, it will kill your power.
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: Vintage small block hi-rises...good or bad?
[Re: 69/70 Plymies]
#2526577
07/24/18 07:51 PM
07/24/18 07:51 PM
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Joined: Jan 2003
Posts: 1,255 Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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8The LD4B and LD340 are very different intakes. If you want an LD4B for your 318 project look no further than the Weiand Stealth, its pretty much an exact copy of the 4B.
The iron manifold is most likely valuable only to a restorer or a racer needing a factory iron manifold for a specific class. If you are want to put it on a 318 you should gasket match the heads or run 340/360 heads or else you'll have port mismatch in a direction that will affect performance.
"The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: Vintage small block hi-rises...good or bad?
[Re: Michael Ecks]
#2526605
07/24/18 09:05 PM
07/24/18 09:05 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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If you are want to put it on a 318 you should gasket match the heads or run 340/360 heads or else you'll have port mismatch in a direction that will affect performance. Not on a mild 318 it won't. This old chestnut gets pulled out whenever anyone want to put a 4bbl intake on a 318. If you are actually building the 318 to the point that this issue rears it's head you are building the WRONG [censored] engine. You should be building a 408 not a 318.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Vintage small block hi-rises...good or bad?
[Re: Supercuda]
#2526651
07/24/18 10:53 PM
07/24/18 10:53 PM
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Joined: Aug 2006
Posts: 2,537 God's Country Maryland
GODSCOUNTRY340
master
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master
Joined: Aug 2006
Posts: 2,537
God's Country Maryland
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If you are want to put it on a 318 you should gasket match the heads or run 340/360 heads or else you'll have port mismatch in a direction that will affect performance. Not on a mild 318 it won't. This old chestnut gets pulled out whenever anyone want to put a 4bbl intake on a 318. If you are actually building the 318 to the point that this issue rears it's head you are building the WRONG [censored] engine. You should be building a 408 not a 318. You're right Supercuda, putting 340/360 heads on a 318 will drop the compression and make it a dog. The op will be far better off using a 318 small port intake (like the LD4B) that is designed for that engine and heads.
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: Vintage small block hi-rises...good or bad?
[Re: 69/70 Plymies]
#2527086
07/25/18 08:50 PM
07/25/18 08:50 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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I didn't say a thing about putting 340/360 heads on anything. I said running a 4bbl carb on a mild 318 will not a problem. The slight mismatch between the 4bbl intake and the 318 heads won't be noticeable till you are so far into a 318 that you are foolish for not just building a 408 instead. A mild 318 will never notice it.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Vintage small block hi-rises...good or bad?
[Re: 69/70 Plymies]
#2528222
07/28/18 11:32 AM
07/28/18 11:32 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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80s cop motors got 360 heads stock
I have a LD4B and can say on a bone stock 2v 318 it is hands down night and day difference from a stock intake/performer intake.
add mild cam/headers it is even better.
I ran it on many 360 headed 318s and performance was great for a 318
I also have a holley street dominator that is another good intake for a bone stock 2v 318
even though it is open plenum/low rise it is a little screamer of an intake for the street on a mild 318
as far as 360 heads on a 318..yes it does low comp yes it does make a dog on the street with a stockish cam...but use a hughes whiplash or the right cam/TC/gearing in a light car they cam be a little surpising on the street.
I had a few lopo JY 360 head 318s add the TC/gears and wind up rpms like a 340.
ask member CLASS OF 65 about the record holding 273 engine he has in an a-body talk about rpms..
if a hipo 273 can do it a 318 can do it IMHO.
myself.. the rpm airgap I have is a little much for a mild teen with out uping the comp ratio/TC/gears
my 318 with a 273 hipo solid lifter cam was pretty hot shifting it at 6500 rpm 4 speed and 3.91sg and had the holley street dominator and a 600 cfm
some of the old stuff still works right on par with the newer stuff now days till you go apples vs oranges with them.
Last edited by scratchnfotraction; 07/28/18 11:37 AM.
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