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engine build ?
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mlpankey View Drop Down
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2010 at 11:26am

they are some adittional cost when using the lerio rods with the allis pistons . the pistons need to be machined for keepers . the lerio rod is made for floating wrist pins.

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wi50 View Drop Down
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Joined: 24 Sep 2010
Location: weegieland
Points: 1010 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wi50 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2010 at 2:15pm
what about simple "buttons" to hold the pins in?
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mlpankey View Drop Down
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2010 at 2:39pm
Originally posted by wi50 wi50 wrote:

what about simple "buttons" to hold the pins in?
its been done by a fellow in miss.
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wi50 View Drop Down
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Joined: 24 Sep 2010
Location: weegieland
Points: 1010 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wi50 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2010 at 3:29pm
I've done it and had fine luck, it was easier than machining for keepers with what I had at the time.  I wouldn't think it would have any negative effects long term.
 
 
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Joined: 13 Sep 2009
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Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2010 at 5:57pm

six of one half a dozen of the other . machining groves for circlips or machining buttons.

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dharpo View Drop Down
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Joined: 01 Dec 2010
Location: middletennessee
Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dharpo Quote  Post ReplyReply Direct Link To This Post Posted: 01 Dec 2010 at 6:56pm
i BUILT A 4.5"  bORE X 6" STROKE WITH 9" RODS 2" INTAKES 1.75" EXHAUSTS 500 LIFT CAM. i CAN PULL 3RD. GEAR WITH 16.9X38 R/TIRES ON A 37 WC. DOES THIS ENGINE COMBINATION NEED A LITTLE TWEAKING TO GET MORE POWER? (I.E. VALVE SIZE)
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mlpankey View Drop Down
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 01 Dec 2010 at 7:30pm
Originally posted by dharpo dharpo wrote:

i BUILT A 4.5"  bORE X 6" STROKE WITH 9" RODS 2" INTAKES 1.75" EXHAUSTS 500 LIFT CAM. i CAN PULL 3RD. GEAR WITH 16.9X38 R/TIRES ON A 37 WC. DOES THIS ENGINE COMBINATION NEED A LITTLE TWEAKING TO GET MORE POWER? (I.E. VALVE SIZE)
  3 inches plus 9 inches leaves 5/8 being flush to the deck you running a 5/8 comp.height piston or one heck of a thick deck plate?

CID is 381.7       Head CFM is 180   
Intake Flow Ratio is 95.74   
Bore to Stroke ratio is 0.75       Rod to Stroke ratio is 1.5       
Mean Piston Speed Angle is 73.24 degrees after TDC  



Superflow determined a long time ago that the maximum ideal value for head flow ratio is 146 cfm/sq.in.
This number is for an 'ideal' frictionless orifice with no dump or expansion losses.
A good ratio would be 133 cfm/sq.in. for a single intake valve.
137 cfm/sq.in. is good for a 2 intake valve setup.
If your flow ratio is smaller than the 133 cfm/sq.in. then you are losing some power.
Talk to your head porter and see if he can get some better numbers.
Your calculated Intake Valve Diameter is 1.79 inches .
Your Valve to Bore ratio is 0.40 .
< value=Calculate =submit name=submit>  

           
VALVE / BORE Ratio 

The valve to bore ratio should be:
52-52.5% of the bore for Wedge heads. 
53-53.5% for Canted valve, rotated canted valve (Mopar P/S hemi) and true Hemi. 
If you decrease intake exhaust ratio down to 70-71% you can move both intake and 
exhaust valves over to the exhaust side and increase intake valve size by .5-1%. 

Anytime you increase valve size over the above stated Valve/Bore ratio you will see 
a small gain in CFM but the discharge coefficient drops and takes your power with it. 
An over shrouded valve instills a host of nasty scenario's, the two worst being 
decreased discharge coefficient and increased reversion below and above intake 
tuned power band.
(according to Darin Morgan)
this was done with the free to use calcs from wallace racing
CID is 382   
Optimum Intake Cam Duration is 286 º  
Exhaust Duration is 303 º  
Intake Valve Lift is 0.482 inches  
Exhaust Valve Lift is 0.414 inches  
LSA is 108 º   
Bore to Stroke ratio is 0.75   
Rod to Stroke ratio is 1.5   




I will leave it up to you to decide.    i would also be curoius of the clutch your using that holds for you we couldnt get one to hold fourth gear on the diesel rearend.




Edited by mlpankey - 01 Dec 2010 at 7:56pm
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