Re: 451 stroker cam/rod clearance?
[Re: JohnRR]
#376930
07/16/09 08:43 AM
07/16/09 08:43 AM
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Joined: Apr 2004
Posts: 1,290
New Kent, Va.
bobbyb
pro stock
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pro stock
Joined: Apr 2004
Posts: 1,290
New Kent, Va.
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Good question, cause I plan on the same build this winter.
2004 Dodge Rumble Bee 5.7 Hemi
1969 Plymouth Roadrunner
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Re: 451 stroker cam/rod clearance?
[Re: RodStRace]
#376933
07/16/09 10:32 AM
07/16/09 10:32 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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yea, I've not heard of cam/rod or cam/crank clearance issues on 451s...it's not THAT much stroke! the bottom half of the 383/400 is the same as the 440, right? don't they use the same timing chains? the differences in the block are all at the deck height aren't they?
if they are the same, then there should be no reason why a 440 stroke would run into issues with the cam in a block with factory dimensions--or for the most part, factory dimensions.
I may be wrong here though on the bottom half of the castings being the same.
**Photobucket sucks**
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Re: 451 stroker cam/rod clearance?
[Re: 70Cuda383]
#376934
07/16/09 11:34 AM
07/16/09 11:34 AM
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Joined: Jan 2003
Posts: 74,992
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,992
U.S.S.A.
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Quote:
yea, I've not heard of cam/rod or cam/crank clearance issues on 451s...it's not THAT much stroke! the bottom half of the 383/400 is the same as the 440, right? don't they use the same timing chains? the differences in the block are all at the deck height aren't they?
if they are the same, then there should be no reason why a 440 stroke would run into issues with the cam in a block with factory dimensions--or for the most part, factory dimensions.
I may be wrong here though on the bottom half of the castings being the same.
No, the bottom of the cylinders are lower , the cam on the other hand is in the exact same location as the 440
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Re: 451 stroker cam/rod clearance?
[Re: JohnRR]
#376935
07/16/09 11:39 AM
07/16/09 11:39 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Quote:
Quote:
yea, I've not heard of cam/rod or cam/crank clearance issues on 451s...it's not THAT much stroke! the bottom half of the 383/400 is the same as the 440, right? don't they use the same timing chains? the differences in the block are all at the deck height aren't they?
if they are the same, then there should be no reason why a 440 stroke would run into issues with the cam in a block with factory dimensions--or for the most part, factory dimensions.
I may be wrong here though on the bottom half of the castings being the same.
No, the bottom of the cylinders are lower , the cam on the other hand is in the exact same location as the 440
Thanks John! so then the only thing you should really have to worry about then, is clearance at the bottom of the cylinder walls? (until you get some really big strokes into the 400 block)
**Photobucket sucks**
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Re: 451 stroker cam/rod clearance?
[Re: 70Cuda383]
#376936
07/16/09 11:44 AM
07/16/09 11:44 AM
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Joined: Jan 2003
Posts: 74,992
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,992
U.S.S.A.
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Yes and that's why a 440 crank needs the counterweights cut down , or the bottom of the bores notched for counterweight clearance . I bought a crank from MP , it was on CLEARANCE  , 5140 forged, 3.75 stroke, 8 BOLT for a LOW DECK . I get it , put it in the block ... DOES NOT FIT  , after looking at it and thinking about it I determined it was the SAME crank sold as a REPLACEMNT for the 426 HEMI , all they did was spec the MAIN SIZE for low deck ... MORE  from the ROCKET SCIENTISTS at MP ...
Last edited by Johnahah; 07/16/09 11:48 AM.
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Re: 451 stroker cam/rod clearance?
[Re: polkat]
#376938
07/16/09 03:51 PM
07/16/09 03:51 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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572 roller cam aluminum rods start looking you may have it close but most BME rods are "shaved" so you won't BUT cam must be degreed in to clear--if you are off by a little on a mock up well...they may be too close--check with a wire of known diameter--best way to check--degree most and they will clear--451 will never give you that problem--451 is the most under rated Mopar combo ever--I have made just crazy HP with one, sprayed the ever loving crud out of one , had customers ( 8secDart) go 8.50's with one and never ever had a problem with one--500 strokers break blocks, pull main webbs out by the root etc etc--a 400 block 451 is one of the all time easiest , best bob weight, fastest rev'ing, RPM dream machines you will ever build--a street 451 with a solid cam and aluminum heads will turn 7000 RPM and scare the pants off you and your passenger! and never give a minutes problem--they rev like a chainsaw!
Me likey! Can you tell? CHEAP EASY FUN--wait a minute I may have a new T shirt design! A back yard rookie can do one and they won't fail you! I like the long (440 length ) rod versions--the piston will slap but she will RUN BABY RUN !!!!!
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