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Gen 3 v8 Lifter Bank Angle?

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amx600rr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amx600rr Quote  Post ReplyReply Direct Link To This Post Topic: Gen 3 v8 Lifter Bank Angle?
    Posted: Mar/04/2021 at 1:47pm
Talking to a Machinist about installing lifter bore sleeves.   He is asking what the Gen 3 401 lifter bank angle is.  Any builders know this spec?    Thanks.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken_Parkman Quote  Post ReplyReply Direct Link To This Post Posted: Mar/04/2021 at 5:36pm
They are 45 degrees, parallel to the cylinder bores
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amx600rr Quote  Post ReplyReply Direct Link To This Post Posted: Mar/04/2021 at 7:30pm
Thank You Sir.   
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve_P Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 8:58am
Does any 90* engine not have the lifter bores at 90*?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 10:31am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst390 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 11:52am
Originally posted by Steve_P Steve_P wrote:

Does any 90* engine not have the lifter bores at 90*?
Cylinders are 90 degree to each other. 45 degree to crank centerline.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst390 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 11:54am
Originally posted by Trader Trader wrote:

https://www.enginebuildermag.com/2009/04/chrysler-a-block-lifter-bank-angles/
Sounds like you have a diligent machinist.
SB chrysler lifter angle is a good reason not to run a sb mopar. And not enough headbolts.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken_Parkman Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 12:27pm
Remember first time I saw that on the SBM, just shocked how stupid it looked. Years later learned it was a result of the weird valve angle combinations Chrysler was messing with in the 50's like the original A engine that had the intake rocker reversed and the older hemi stuff.

Some engines even have a different angle intake to exhaust.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 6PakBee Quote  Post ReplyReply Direct Link To This Post Posted: Mar/05/2021 at 1:19pm
Originally posted by Ken_Parkman Ken_Parkman wrote:

Remember first time I saw that on the SBM, just shocked how stupid it looked. Years later learned it was a result of the weird valve angle combinations Chrysler was messing with in the 50's like the original A engine that had the intake rocker reversed and the older hemi stuff.

Some engines even have a different angle intake to exhaust.


Yup.  When the A series smallblock was introduced in '56 it was based on the first generation Hemi block that required that weird lifter bore angle.  Why Mopar never changed it is a mystery as it survived through the LA's and Magnum engines even though by then it wasn't needed.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Mar/08/2021 at 6:54am
As long as the lifter itself is perpendicular to the camshaft the lifter bore angle really doesn't matter. It will affect the rest of the rocker/pushrod geometry of course, but as long as that is correct there technically shouldn't be a problem -- at least not for a stock engine. High rpm operation (sustained over 4000 rpm) might make more of a difference though. The wider the angle the more room you have to put things, of course.
Frank Swygert
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