Hughes or Engle cam

[91r/t]

god points rumble
you talk with 5 help line techs at the same company you will get 5 different answers
With a Engle MOPAR .904 cam
he can
run one size shorter seat duration than with a chevy cam with more under the curve
so
112 will not move the intake close point out of the comfort zone- long rod engines are more sensitive on ex open and intake close
his overlap will be less- as it should be for a long rod engine which have more piston dwell (movement per crank movement)
Contrary to frequent assertions Engle, the Crane .904s and others can have more acceleration and still be easier on the valve train These are not "race only when required by the rules" hydraulics
remember Engle and MP measure their seat duration around .008 so a 268 Engle or MP is more seat duration than a 268 Comp and a LOT more than a 268 Crane
As RRR says - drop back a notch

So are you saying go with the 238 duration with .534 lift or 244 duration with .539 lift?

Here are the Engle grinds below:
Duration @ .050 Lift w/ 1.5 ratio rocker
K52 209 duration .458" lift
K54 214 duration .470" lift
K56 224 duration .504" lift
K58 230 duration .514 lift
K60 238 duration .534" lift
K62 244 duration .539" lift
K64 248 duration .557" lift

 

[mentor70]

i dont know if anyone asked, so i will, what compression is this 500 at?...mine was over 11 to 1, and the 238 @ .050 Hughes was too small, even Dave said he would not have put that cam in my build, (when i bought the cam, i was going stock stroke 440)...the engine was very happy with a 250 or 254 and 50 cam. that was a solid lifter i might add.

if this engine had less compression i guess it would be ok with a smaller cam.

 

[91r/t]

i dont know if anyone asked, so i will, what compression is this 500 at?...mine was over 11 to 1, and the 238 @ .050 Hughes was too small, even Dave said he would not have put that cam in my build, (when i bought the cam, i was going stock stroke 440)...the engine was very happy with a 250 or 254 and 50 cam. that was a solid lifter i might add.



if this engine had less compression i guess it would be ok with a smaller cam.

It has 10.75:1 to 10.8 compression.

 

[rumblefish360]

It has 10.75:1 to 10.8 compression.

Yea I may go with a 110 to compromise.

Cam selection may get tricky here between the two above comments with the desired results your looking for. At a 110, power brakes “should be possible” because vacuum will be boarder line. Good luck.

 

[91r/t]

Cam selection may get tricky here between the two above comments with the desired results your looking for. At a 110, power brakes “should be possible” because vacuum will be boarder line. Good luck.

That’s why I was leaning toward the 112 and figured with that much duration and lift, the idle would be pretty lumpy either way.

 

[BSB67]

CAN YOU POST THE LIST

I think I posted them awhile back.

 

[BSB67]

i dont know if anyone asked, so i will, what compression is this 500 at?...mine was over 11 to 1, and the 238 @ .050 Hughes was too small, even Dave said he would not have put that cam in my build, (when i bought the cam, i was going stock stroke 440)...the engine was very happy with a 250 or 254 and 50 cam. that was a solid lifter i might add.

if this engine had less compression i guess it would be ok with a smaller cam.

Generally speaking, a 250°/254° solid will be similar to a 242°/246° hydraulic in characteristics.

 

[91r/t]

Generally speaking, a 250°/254° solid will be similar to a 242°/246° hydraulic in characteristics.

Can you tell me exactly how much idle vacuum you made? Also What lobe center was that ground on?

 

[BSB67]

I think your question is to mentor70, correct?

 

[91r/t]

I think your question is to mentor70, correct?

Yes I am sorry sometimes these quotes get all mixed up. Sucks trying to do the stuff from your iPhone

 

[wyrmrider]

either one
depends on weight, gears, converter and your needs
lighter weight, lower gears loose converter and a weekend warrior hot rod go with the 244 110
stock weight B body 355 or taller and HP converter stick with the 238
headers do not go too much bigger on the exhaust- even same lobe
if you have head flows you could contact Rick Jones at Controlled Induction and have him run the numbers and nail it
If you would consider solid get a hold ofMike Jones and have him run the numbers
LCA should be a result not an input
A long rod motor (compared to a 383 chevy) needs to close the intake earlier and open the exhaust later similar changes from SBC on the Exhaust open- Intake Close - overlap
plot your piston motion up and down against crank rotation in degrees- enough difference to make a difference
The tech support guys get it wrong most of the time