<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">I have an 84 302 I am going to rebuild and put in my truck. I was seriuosly thinking about a 331 stroker kit but figure I'm going for good sound and and power but with the truck weighing around 3 grand the 302 would be sufficient for power I would think. Plus it would save me a about 1500 bucks not having the guy put the stroker kit in. I am planning on driving it often if not every day.What I'm asking is opinions on this cam, I've read where it has a mild to rough idle which is what I want becuase I think it will make the truck sound "meeeeaaaan". On certain websites it says the cam can be used for daily driven applications. It is true, you have to do your homework on camshaft selection and I've finally cam to this one. Do yall think this would be the best cam for me? What should I expect from this cam? Here are the numbers for the cam from summitracing.com

Brand:
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COMP Cams
</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Product Line:</TD><TD class=overview-c2 width="75%">COMP Cams Magnum Hydraulic Camshafts</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Cam Style:</TD><TD class=overview-c2 width="75%">Hydraulic flat tappet</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Basic Operating RPM Range:</TD><TD class=overview-c2 width="75%">1,800-5,800 RPM</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224 int./224 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Intake Duration:</TD><TD class=overview-c2 width="75%">270</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Exhaust Duration:</TD><TD class=overview-c2 width="75%">270</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Duration:</TD><TD class=overview-c2 width="75%">270 int./270 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 int./0.500 exh. lift</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Lobe Separation (degrees):</TD><TD class=overview-c2 width="75%">110</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Computer Controlled Compatible:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Grind Number:</TD><TD class=overview-c2 width="75%">FW 270H-10</TD></TR></TBODY></TABLE>


Thanks guys

 

Sorry guys what I really should have asked was if any body has ever owned a comp cam 270H-10 and how they liked it or if they just had an experience with one. You know....if the cam made good power and torquearound town, or if it sounded great at idle, gas mileage....things like that.

 

what gears, tranny and tire size will you be running?

 

3:55 to 3:73 gears (8.8 rear end) t-5 five speed trans or auto AOD trans and P235/75R-15 tires

 

d really suggest going with comp cams extreme energy line of cams, basicaly newer technology then there old line of mangum cams, there dual pattern little more lift. You end up with better vacuum, more low end torque etc. id think this one would be pretty good for you
http://store.summitracing.com/partde...5&autoview=sku


that cam is very close to the specs of what is in my 1980 ford except i have a 351 windsor, i have the extreme energy cam though. great sounding cam and awesome performance

 

The basic difference between the Magnum flat tappet and the XE flat tappets is that the XE's are asymetrical, or there's more lift and duration on the exaust side.

For example, The XE268H10 has roughly the same intake specs as the 270H10, but the exaust specs are 230 duration at .050, with .512 lift. The fast, steep, ramp effect of the roller xtreme energy cams isn't really gained using a flat tappet cam, however. If the exaust ports have poor flow, then the XE version may work better. In my experiance symetrical cams always have better low end grunt, though.

The XE version has about 4* more overlap than the Magnum version, as the exaust valve closes later on the intake stroke. The extra duration on the exaust side also results in the exaust valve opening 5* sooner during the power stroke.

The XE274H10 is, in my opinion, too big for that application, but your milege may vary. The XE274 will give less dynamic compression, as it effectively shortens up the compression stroke a lot, compared to the 270 or XE268. In theory, you don't want the intake valve closing too late on a stroker, so that the extra stroke can be better utilized. It may be okay with a 331 and T5, but an AOD will need a high stall converter, even given the 30 extra cubes. It has about the same overlap as a B303 roller for a lumpier idle.

Any of these cams in question will sound good, because they all have at least 224* (@ .050 ) duration and 110* lobe seperation angles. The narrow LSA on all, gives enough of overlap for a lopey idle.

 

true i am running a stall converter, and i have so much compression anyways that i was fine. Have like 12:1 compression lol

 

would this be a better cam for me It has the LSA of 110* but has less lift, would this have that lopey idle yet have good low end torque? Here is the info on the cam:

Brand: COMP Cams
Product Line: COMP Cams High Energy Camshafts
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,200-5,200 RPM
Intake Duration at 050 inch Lift: 212
Exhaust Duration at 050 inch Lift: 212
Duration at 050 inch Lift: 212 int./212 exh.
Advertised Intake Duration: 260
Advertised Exhaust Duration: 260
Advertised Duration: 260 int./260 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.447 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.447 in.
Valve Lift with Factory Rocker Arm Ratio: 0.447 int./0.447 exh. lift
Lobe Separation (degrees): 110
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Grind Number: FS 260H-10

 

Wow, that cam is a lot like a flat tappet version of the HO cam, but I think you will loose the "sound" your after. It has significantly less overlap than these other cams, despite the tight LSA.

I think your best bet is the Magnum 270H or the XE268H10. I don't recall the heads you planned on using. If they are production based heads then probably go with the XE268, in my opinion of course.

 

Yes, I was going to use the production heads for my aplication so that helps alot. thanks for the help all you guys you've been alot of help

 

from what everyone has told me it looks like the comp cams XE 268H10 cam seems to be the best cam for my application cause its operating range looks right(1600-5800) and it has high lift of 509/512 and 110* LSA to help with the sound I want...thanks guys

 

Would this cam make enough vacuum for power brakes? I think the power brake system that I am going to use needs at least 16' of vacuum to work.

 

I'm asking about the XE 268H10 cams vacuum

 

the cam im running is a higher level xtreme energy and i have power brakes and it works just fine, no problems at all

 

i say teh more cubes the merrier