Erson Cam >> good with lots of compression ?

-
stroker402

stroker402

1968 dart GTS convertible
Joined
Jan 30, 2006
Messages
1,096
Reaction score
473
Location
milwaukee wi.
Getting around to building my second 273 engine that came up with rod knock.
I'm thinking about using this erson SOLID cam again ......... only difference is going with high compression 10.5:1 stock dome pistons . closed chamber heads again ld4b headers 4 speed. This cam was used with 4 relief pistons before it came up with a rod knock. Probally had around 9.1 compression approx. It actually ran pretty good . just wondering what you guys think if I were to put this cam back in another engine and give it some 10.5 compression. another 273 block is ready to assemble.

VIDEO HERE

specs are >>> 1m286y advertised duration 286* - 510 lift . similar specs to the D-dart 273

Part No.: E420721

Grind: HI FLOW I M

SOLID

107 Lobe Separation Angle



Overlap: 72.00



Intake Opens: 36.00 Exhaust Closes: 36.00



Intake Closes: 70.00 Exhaust Opens: 70.00



Running Clearance: 0.022 0.022 [Hot]



Valve Lift (Int / Exh): 0.510 0.510



Duration (Int / Exh): 286 286









Checking Figures @ .050" Tappet Rise



Overlap: 28.00



Intake Opens: 14.00 Exhaust Closes: 14.00



Intake Closes: 48.00 Exhaust Opens: 48.00



Duration Intake: 242.0 Duration Exhaust: 242.0



Lobe Lift Intake: 0.340 Lobe Lift Exhaust: 0.340



Intake Center Line: 107



Rocker Arm Ratio: 1.50
 
Sounds like fun if you can make it work and keep the tires under it. LOL
 
Just make sure you dial it in and check piston to valve clearances.
 
stroker402 said:
Getting around to building my second 273 engine that came up with rod knock.
I'm thinking about using this erson SOLID cam again ......... only difference is going with high compression 10.5:1 stock dome pistons . closed chamber heads again ld4b headers 4 speed. This cam was used with 4 relief pistons before it came up with a rod knock. Probally had around 9.1 compression approx. It actually ran pretty good . just wondering what you guys think if I were to put this cam back in another engine and give it some 10.5 compression. another 273 block is ready to assemble.

VIDEO HERE

specs are >>> 1m286y advertised duration 286* - 510 lift . similar specs to the D-dart 273

Part No.: E420721

Grind: HI FLOW I M

SOLID

107 Lobe Separation Angle



Overlap: 72.00



Intake Opens: 36.00 Exhaust Closes: 36.00



Intake Closes: 70.00 Exhaust Opens: 70.00



Running Clearance: 0.022 0.022 [Hot]



Valve Lift (Int / Exh): 0.510 0.510



Duration (Int / Exh): 286 286









Checking Figures @ .050" Tappet Rise



Overlap: 28.00



Intake Opens: 14.00 Exhaust Closes: 14.00



Intake Closes: 48.00 Exhaust Opens: 48.00



Duration Intake: 242.0 Duration Exhaust: 242.0



Lobe Lift Intake: 0.340 Lobe Lift Exhaust: 0.340



Intake Center Line: 107



Rocker Arm Ratio: 1.50
Click to expand...



It sounds angry! How big was your smile when you first heard it run?
 
toolmanmike said:
It sounds angry! How big was your smile when you first heard it run?
Click to expand...
Yeah mike , that was a nasty sounding cam .
So do you think by adding dome pistons would help this cam out some ? maybe help with low end grunt ? It did perform very well in previous engine with approx 9.0 compression .
 
stroker402 said:
Yeah mike , that was a nasty sounding cam .
So do you think by adding dome pistons would help this cam out some ? maybe help with low end grunt ? It did perform very well in previous engine with approx 9.0 compression .
Click to expand...
I would think a point or two of compression would help quite a bit. It will be more angry. You will be able to hear it. It will be a interesting comparison because everything else will remain the same. Just compression will change.
 
toolmanmike said:
It sounds angry! How big was your smile when you first heard it run?
Click to expand...
That erson ..... the exhaust was real quite it on it, when I first bought the Barracuda , but you could here that it had a big cam in it.
 
Last edited:
I'm no cam expert by any imagination but.. I would put that in at 102-104 and that should help the low end.. Hell you have it try it. If you just cant stand it then Its just a few gaskets to change.
 
Pretty Racey cam... It will like more squeeze.

It's pretty close to the Jones cam my son has in his dirt modified. The rules require no more than 9-1 but his 355 is closer to 12-1... Darn thing eats up the competition from the flagstand into turn one.
 
mod5v said:
I'm no cam expert by any imagination but.. I would put that in at 102-104 and that should help the low end.. Hell you have it try it. If you just cant stand it then Its just a few gaskets to change.
Click to expand...
Good Idea !
 
advancing the cam doesn't do too much. The HP stays pretty much the same and the torque increases from 283@4000 to 286@4000. Not enough to bother. Thats with stock 4 barrel intake and a 550 carb with stock manifolds and exhaust.
 
AJ/FormS said:
Ima thinking at 10.5cr,your cylinder pressure will be a tad over 165 psi. So, depending on the combo, it could be a tough street-tune.
Click to expand...
would this 510 lift erson have enough piston to valve clearance with 10.5 domes and 920 heads ?
 
Headers and intake made a huge difference
0° advance HP 331@6000 TQ 339@4000
1° advance HP 329@5500 TQ 341@4000
2° advance HP 330@6000 TQ 344@4000
3° advance HP 330@6000 TQ 346@4000
 
You must log in or register to reply here.
-

Back
Top