Smooth Idle cam??
I was also thinking of the Crane 227, but was wondering if were possible for a custom cam to be bigger but smooth idle. I mean stock sounding. I was running a GM847 but.........I want that "factory" sleeper look and sound. Im also going to redo the exhaust. Right now I have a 3in X. But im going to use an ORY into a catback (undecied) with SLP CME (a steal at $120).
Remember also exhaust/idle rpm can make a huge difference. Here is my old Joe Overton custom 220/226 cam. Stock catback with a 1000rpm idle vs stock catback with the cutout open and 550rpm...
http://media.putfile.com/openvscosed
http://media.putfile.com/openvscosed
Maybe its just me but the hotcam is lopey, you can tell its a decent sized cam through an aftermarket catback. Im using a stock muffler and you cant tell if the car is camming or missing...LOL!!!
Id go with the Crane 227 with the idle set close to 1K RPM and a stock muffler w/ e-cutout.
Id go with the Crane 227 with the idle set close to 1K RPM and a stock muffler w/ e-cutout.
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TECH Addict
Joined: Jul 2005
Posts: 2,153
Likes: 3
It never fails that in every single "which cam?" thread, someone recommends the POS Hot cam.
You want a smooth idle pick the small duration like the LPE or Crane 227, if not smooth enough raise the idle rpm a little and play with timing.
A friend used the LPE 211/219 in a street race car and raised the idle to like 900rpms in gear and was able to pass it off as stock to people expecting him to be hiding something.
How bout a custom crane 210/224 109 LSA with a little more lift? I always wanted to see what would happend if you narrow down the LSA on some of the smaller cams like the LPE, crane227, or the cc305? Dont know if it would work out, but id still like to see what happens.
If the lobes were rearranged properly to get that tighter LSA it certainly would work.
A friend has a cam only car that ran very close to what the popularly setup stroker cars were running the one time we attended a big b-body event, his car is pretty basic the cam is a custom from AI similar lift and duration too the HOT but not necessarily similar specs.
http://www.babcox.com/editorial/ar/eb90252.htm
I may not agree with everything Vizard says but he gets a LOT more right than most people and uses a really good machinist. http://www.stockcarracing.com/techar...c_cutting.html
A friend has a cam only car that ran very close to what the popularly setup stroker cars were running the one time we attended a big b-body event, his car is pretty basic the cam is a custom from AI similar lift and duration too the HOT but not necessarily similar specs.
http://www.babcox.com/editorial/ar/eb90252.htm
I may not agree with everything Vizard says but he gets a LOT more right than most people and uses a really good machinist. http://www.stockcarracing.com/techar...c_cutting.html
Overspreading the LSA results in massive midrange torque losses and all the off the shelf stuff is too wide to start with. This is very BAD advice that keeps getting repeated.
You want a smooth idle pick the small duration like the LPE or Crane 227, if not smooth enough raise the idle rpm a little and play with timing.
A friend used the LPE 211/219 in a street race car and raised the idle to like 900rpms in gear and was able to pass it off as stock to people expecting him to be hiding something.
You want a smooth idle pick the small duration like the LPE or Crane 227, if not smooth enough raise the idle rpm a little and play with timing.
A friend used the LPE 211/219 in a street race car and raised the idle to like 900rpms in gear and was able to pass it off as stock to people expecting him to be hiding something.
Read the first article I linked.
Theories like the one you stated are based on starting with a cam spec'd right, if you pretend there is no cuttoff then why not just spread the LSA to like 130 and make awesome power from idle to 6500
?As I said before if a cam idles too aggressively go smaller on the duration and raise the idle.
TECH Apprentice
Joined: Aug 2006
Posts: 368
Likes: 0
I have the cc305, it has a nice small lope at idle and sounds amazing all the way to 6200. The car was tuned once and needs to be looked over so this summer I will have the dyno numbers for it. The cam is very loud with hooker shorty headers, no cat, and borla cat back exhaust....it is not very stealth at all...lol..
You are not considering the fact the off the shelf stuff is already like 6-8 degrees wider than it would be for max peak power.
Read the first article I linked.
Theories like the one you stated are based on starting with a cam spec'd right, if you pretend there is no cuttoff then why not just spread the LSA to like 130 and make awesome power from idle to 6500?
As I said before if a cam idles too aggressively go smaller on the duration and raise the idle.
Read the first article I linked.
Theories like the one you stated are based on starting with a cam spec'd right, if you pretend there is no cuttoff then why not just spread the LSA to like 130 and make awesome power from idle to 6500
?As I said before if a cam idles too aggressively go smaller on the duration and raise the idle.
Last edited by Whitez406; Jan 27, 2008 at 10:23 PM.
No he should pick low duration NOT spread the LSA stupidly wide as you want and raise the idle and play with timing to get the idle smooth.
I can see about a 113 for emissions but that is the limit and the only reason to go that wide.
The little Lingenfelter one as I said can idle very smooth.
I can see about a 113 for emissions but that is the limit and the only reason to go that wide.
The little Lingenfelter one as I said can idle very smooth.
How is that stupidly wide? 114 or 115 is great for what he wants. They have much better street manners. How is a 113 or lower better for emissions? If he uses a 110-112 hes gonna start to develop the idle he doesnt want and get a peakier rpm range. Maybe he should just run the same setup as you along with everyone else on this entire website cause noone will ever have as good of a setup as you do. You shoot down everyone in almost every thread on this site. Really he should be talking to someone on the tech line at comp, crane or LPE. They would steer him in the rite direction but im sure you out knowledge them as well.