Need input on new cam selection
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 150
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From: Acworth, GA
Need input on new cam selection Been in touch with Comp to get a new cam. They are recommending the 54-424-11 (xr265hr). Duration is 265/271 (212/218). Valve lift specs out with my 1.8 rockers at .590/.596 lift. 383 cubes, m6 car, with stock port/polished heads, exhaust, ls6 intake. Already have supporting mods (springs, retainers, lifters, etc). Currently I'm at 550ish range of lift and looking for a little more but car is a daily driver.
What are your opinions, thoughts, smart *** comments, etc?
What are your opinions, thoughts, smart *** comments, etc?
TECH Senior Member
Joined: Feb 2009
Posts: 5,445
Likes: 4
compcam has a cam quest you could try different cams a see what cam works best.maybe look at a lsr cams for ls engines,they will make a little more power.54-455-11 will make more power then 54-424-11 ,and make it at lower rpms.or contact Patrick-G and get cam better then a shelf cam.
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 150
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From: Acworth, GA
Just checked the 54-455-11 and thats gonna push the limit of my springs (.600 max on springs) at .650-ish lift with the 1.8 rockers. Can anyone running this similar setup with the .600 lift range tell me what I should expect with the xr265hr - not so much powerwise, but more of idle quality, streetability, sound/obnoxiousness, etc.
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 150
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From: Acworth, GA
Driveability first, power second. I baby the car for the most part. I rarely "show off". Every once in a while I'll play on the street with other cars. I cannot race the car at 1/4 mile track anymore because I won't install a cage in this car.
My goal is to add power yes, but without sacrificing driveability and dependability. I have not taken it past 6k rpms since I've owned it, and probably never will. So my ultimate goal is to maximize my power in the rpm range that I use -- not so much in a range of rpms the car will never see.
My goal is to add power yes, but without sacrificing driveability and dependability. I have not taken it past 6k rpms since I've owned it, and probably never will. So my ultimate goal is to maximize my power in the rpm range that I use -- not so much in a range of rpms the car will never see.
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Ive read alot of people like that particular cam who want just what your looking for, great low & mid range but with a little more power up top.
What LSA were you looking at getting? That cam would even be more tame in a 383.
What LSA were you looking at getting? That cam would even be more tame in a 383.
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Brett Foote TECH Senior Member
Joined: Feb 2009
Posts: 5,445
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lift is not as important when making power,duration,LSA,and ICL are.I would get some upgraded stock rockers and get a cam that make power the way you want it.get a custom cam from 1 of the cam guys on this thread.
Thread Starter
On The Tree
Joined: Mar 2008
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From: Acworth, GA
lobe separation angle is 115. total duration is 265/271 with 212/218 at .050.
I do believe the duration at .050 will be a little broader on my setup with the higher ratio rockers.
I am buying a cam either scenario, so I'd rather find one to best suit the rockers I already have, versus buying different rockers as well.
I do believe the duration at .050 will be a little broader on my setup with the higher ratio rockers.
I am buying a cam either scenario, so I'd rather find one to best suit the rockers I already have, versus buying different rockers as well.
agreed i would call a sponsor and for sure get a bigger cam. the tr224 on 114 will drive like stock in your car with that 383 and a good tune. That cam will also be easy on your valvetrain.
Another cam to consider would be this one.
http://www.engpwrsys.com/index.php?a...ns&productId=8
Another cam to consider would be this one.
http://www.engpwrsys.com/index.php?a...ns&productId=8
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 150
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From: Acworth, GA
Thank you guys for all of your input - I'm going to get as much advice from a few sponsors and local hotrod shops before I commit. I realize I'm still being a little conservative, lol.
TECH Enthusiast
Joined: Jan 2002
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From: Helendale, Ca (SilverLakes)
With that cam, you will have very good idle, great street manners, does not require tuning. It is a LS6 replacement cam. Use with your stock rockers.
I am thinking about getting it also as it will drive better than the cam in my Sig.
I am thinking about getting it also as it will drive better than the cam in my Sig.
TECH Fanatic
Joined: Aug 2004
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From: Auckland, Nth Is, New Zealand.
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 150
Likes: 0
From: Acworth, GA
The major dilemma I'm faced with is do I keep the cam rather small so I can keep my current valve spring and rocker setup, or get a cam the engine more likely deserves but then be forced to change rockers springs etc. If I did it the second way I guess I'm just a little nervous about it being too much for me - as in too obnoxious or annoying to drive as a daily driver. Its getting a tune either way.
