Anybody run a Comp 20-246-4 in their small block?

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toolmanmike

toolmanmike

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I stumbled across a list of solid lifter small block cams I had put together a couple years back. The Comp Magnum 20-246-4 sounds interesting for a 273. Not too mild but not too big. I searched and there has been a mention or two of this cam but not much real info on it. I would like to hear one run in a 273 or even a 318. Anybody out there in Mopar Land have one? tmm

224° @ .050 .468 lift 110°
 
I am running the 20-246-4 cam in my mild built 273.

[ame="https://www.youtube.com/watch?v=OP6ALa62s8A&feature=youtu.be"]new intake warm - YouTube[/ame]
 
That sounds REALLY good. You said mild build, what else have you done?
 
Excellent Sound from the Barracuda

We've installed the 'Magnum 270S' in several 273 Commando applications.

Lift ..................... .468"/.468"
Duration ............... 270*/270*
Duration @ .050" ... 224*/224*
Overlap ................ 50*
LSA ..................... 110*
Centerline ............ 106*
Lash .................... 022"/.022"

It produces good power across the Power-Band, and is a Monster in
Mid-Range, especially 3000 thru 5000 RPM's

With cars using 3.91 Gears or less >

We use the #901 Valve Springs {Single Spring w/Damper}
* #104 lbs. Valve-Closed
* #259 lbs. Valve-Open

With 4.10 Gears or taller, we go with the #995 Valve-Spring {Dual Spring}
 
Your exhaust sounds great! What are you running? (mufflers etc.)
I like that cam. Just a little chop. tmm

Thanks for posting James and the responses guys.
 
So Mike what other solid cams are on your recently found list.
 
Here's a list of solid lifter small block cams. The list starts pretty mild and gets more radical.

1) Isky E-4 260/250° 216° .425/.425 108° 2000-5500 rpm
2) Schneider 14201 264/264° 224° .480/.480 110° 1500-5000rpm
3) Comp 20-246-4 270/270° 224° .468/.468 110° 1800-5800rpm
4) Crower 31320 278/288° 229° .446/.456 112° 2200-6000rpm
5) Comp XS268 268/274° 230/236° .488/.501 110° 2000-6000rpm
6) Comp 20-274-4 282° 236° .495 110° 2500-6000rpm
7) Comp 20-230-4 274/280° 236/242° .502-.511 110° 2200-6200 rpm
 
Running 2" exhaust to Xlerator Turbo mufflers. Stock manifolds and converter

The sound really improved after upgrading intake to the LD4B and carb to a 650CFM. With the old manifold and 500CFM carb the idle was to fast, can't hear the cam as well

[ame="https://www.youtube.com/watch?v=bn3FnB2yCKg"]66Cuda273 - YouTube[/ame]
 
toolmanmike said:
Here's a list of solid lifter small block cams. The list starts pretty mild and gets more radical.

1) Isky E-4 260/250° 216° .425/.425 108° 2000-5500 rpm
2) Schneider 14201 264/264° 224° .480/.480 110° 1500-5000rpm
3) Comp 20-246-4 270/270° 224° .468/.468 110° 1800-5800rpm
4) Crower 31320 278/288° 229° .446/.456 112° 2200-6000rpm
5) Comp XS268 268/274° 230/236° .488/.501 110° 2000-6000rpm
6) Comp 20-274-4 282° 236° .495 110° 2500-6000rpm
7) Comp 20-230-4 274/280° 236/242° .502-.511 110° 2200-6200 rpm
Click to expand...

Racer Brown ST-2 ~ 260*/260* ~ 218*/218* ~ .450"/.450" ~ 112* ~ 1800-5500 RPM's

Clay Smith C-272 ~ 272*/272* ~ 224*/224* ~ .435"/.435" ~ 108* ~ 1000-5800 RPM's
 
cudajames said:
Running 2" exhaust to Xlerator Turbo mufflers. Stock manifolds and converter

The sound really improved after upgrading intake to the LD4B and carb to a 650CFM. With the old manifold and 500CFM carb the idle was to fast, can't hear the cam as well

[ame="[MEDIA=youtube]bn3FnB2yCKg[/MEDIA]"]66Cuda273 - YouTube[/ame]
Click to expand...
Is this video still available? It says it’s private.
 
This is the run of the mill 224@50 half inch lift cams that were usually the "go to" cam for a mild street engine back in the day.
Good as a hydraulic as well and usually the most popular as a hydraulic.
Everyone makes them for just about every common V8. Brown box specials, RV, Towing cams they were sometimes called as well.
Worked pretty well in any thing 300 Ci and up and as an entry level performance cam.
I had one in a bog stock 5 liter (308) Ci engine..
 
That is what Comp called 'Variable Duration Mechanical' cams & were somewhat unique as nobody else offered them. The lash could be changed from 0.015" to 0.030", which rocked the adv duration 10* either side of the nominal 270* [ 260-280* ].
 
I remember years ago calling cam suppliers about how far each way you go with the tappet clearance.
Lots seemed to be 'Variable Duration"..LOL...
 
Bakerlite said:
I remember years ago calling cam suppliers about how far each way you go with the tappet clearance.
Lots seemed to be 'Variable Duration"..LOL...
Click to expand...
If they are solid, they all are really. I've even varied the preload on hydraulics. It makes a difference, albeit small. On solids though, it can make a pretty big difference.
 
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