best low rpm 5.0 cam?
- Thread starter enyawix
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A stock cam is nice for torquey driveability.
Typically you need to look for a cam with higher lift (generally goes with torque), lower duration, less overlap (lsa). A higher angle overlap (112 compared to 108) provides a broader range of torque/horsepower over the desired rpm, but even broader. The 108* will peak torque quickly and max out, but it isn't too good for idle quality.
Too much duration for low-rpm needs allows the airflow additional time to enter or exit the cylinder. For about every 10* of duration increase the powerband moves up roughly 500 RPM, and it also goes in the opposite fashion.
A custom cam is the best way to go of course.
The first link in my signature has several common camshafts and there basic specifications.
Typically you need to look for a cam with higher lift (generally goes with torque), lower duration, less overlap (lsa). A higher angle overlap (112 compared to 108) provides a broader range of torque/horsepower over the desired rpm, but even broader. The 108* will peak torque quickly and max out, but it isn't too good for idle quality.
Too much duration for low-rpm needs allows the airflow additional time to enter or exit the cylinder. For about every 10* of duration increase the powerband moves up roughly 500 RPM, and it also goes in the opposite fashion.
A custom cam is the best way to go of course.
The first link in my signature has several common camshafts and there basic specifications.
Flavadave4
Active Member
I see you posted the Comp Cam XE270HR-12
218*/224* - .544"/.544" - 112* - 1,800-5,800 RPM
I was also looking at that cam. What do you think about it?
It calls for 1.7 rocker arms, and I have 1.72
I would talk with DMAN302 on here. He has that cam, and he makes close to 320rwhp with it on a 302/306 with some Edelbrock heads/Intake IIRC.
The idle needs to be set in the 850-900 RPM range probably to idle good and vacuum is probably close to 15" from my readings.
It should be a good cam, but I do not run it personally...
oz and LSC NYC and Cougar5.0 all run it, some the 112 LSA and some the 114 LSA.
do they still make the XE270HR-12? I went to comp cams website and couldnt find it, did a google search and still couldnt come up with a place that sells one.
Ya this is the cam.
Using this rocker ratio calculator I get 550 lift wow.
http://www.wallaceracing.com/rockercalc.php
My 351 will love this
http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-320-8
http://www.compcams.com/Community/Articles/Details.asp?ID=1040647744
$261.99
http://www.jegs.com/webapp/wcs/stores/servlet/productitem_10001_10002_758979_-1_109536?CT=999
Using this rocker ratio calculator I get 550 lift wow.
http://www.wallaceracing.com/rockercalc.php
My 351 will love this
http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-320-8
http://www.compcams.com/Community/Articles/Details.asp?ID=1040647744
$261.99
http://www.jegs.com/webapp/wcs/stores/servlet/productitem_10001_10002_758979_-1_109536?CT=999
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