I'm wondering if somebody can explain how to properly degree a motor, primarily to dial in adjustable cam gears to true 0.

 

Ok you are going to need to get some dyno time. The only real way to adjust them properly is with a dyno. that is if you want to make max power.

 

Thats not what I'm talking about, I'm talking about the fact that most gears are not actually at 0,0 when installed.

 

If you head or block has not been touched by a machine shop, and you're installing quality gears, then they should be at 0

 

Even if the engine is stock, you're not at true zero. The factory timing marks are close, but cam timing is affected by a variety of things like timing belt tension, valve lash, etc. The only proper way to set cam timing (is NOT on a dyno!) but by using a degree wheel and dial gauge. This kit from comp cams is pretty complete and easy to use once you learn how to use it http://www.compcams.com/catalog/337.html

If you know how to use this method, then cam tuning on the dyno isn't even necessary. Real engine builders (outside the import industry) set cam timing before the engine is even dyno tested. Most real cam makers give you a cam spec sheet (like TODA) that tells you where to set timing, but most people in the import industry don't know **** about setting cam timing with a degree wheel so they just tell people to tune cam timing on a dyno.


[Modified by MugenDC2R, 1:58 AM 2/25/2002]

 

MugenDC2R: Thanks, I knew there were kits available, never saw this one particularly. But I was really wondering was how you actually use this kit.

 

You are correct, that most of the aftermarket cam gears are not properly degreed to 0.0

My set of AEM's were +2 degrees off one side and -1 on the other. I ended up selling them and making my own. I don't like to have to read the number, then remember to add/subtract to get the correct readings.

Which kinda makes you wonder... all the people running cam gears could have different settings then they believe they actually have. So which setting REALLY makes more power...

To degree a cam, buy a degree wheel and get a book that explains how to do it. It's too detailed to explain in this post.

-Brad

 

Thanks guys I will be looking into it (aka asking my engine builder!)

 

i would think that the kits would come with detailed directions on how to degree the cams. i'm not sure on this tho.

 

I think a general how-to would be a great addition to this site, too bad it only has message boards and no place for articles. Maybe try Hybrid, they have a place for articles.

 

ttt