Well, the amount of timing you change by moving one tooth is exactly 7.5°. I know this beyond any doubt ..... I'm not sure to which direction is advance or retard and to make things very clear to me, I want the specific answer to the question I posed ..... What direction to move the hole for retarding the timing?

Oh yeah, if the manual says that cam timing can vary by 7° and still be adequate, this means that you could be one tooth off and still be OK (nearly) or be off spec by 14.5°..... This could make a huge difference in performance..... I have a couple of ideas that I'd like to try, but they might not be workable due to the rather large range that might be required to tune the car properly..... Maybe the aftermarket adjustable cam gears are the best option if you need to mess around with timing adjustments while you tune the car........ I thought that there was some kind of cookbook numbers that people used. Something like -2/-2, -3/-3, -4/-4, etc. I can easily achieve any of those numbers by using a bit of ingenuity, however, It's not so easy to make it variably adjustable.......

 

Well then do it if you're such a genius just trying to learn more about the car. Let me know if I can get you some cam gears after you ruin the stock ones. Here's a tip, you can't move the stock cam gears less than one tooth. And that's too much.

 

Why are you so hostile toward him?
His plan is to figure out how many exact degrees the cams are retarded from TDC
If you eye up the stock gears they look like they are 1 tooth (48 teeth/ 360=7.5 degrees) but this is only by sight it could be more or less.
To find out the answer he would need to set a stock gear on a radial table and measure it exactly
then once that info is gained the gear can be re-drilled 180 degrees from the stock hole...in fact this can be done every 90 degrees to give a cam gear that will have 4 possible adjustments.
I think it is great that someone is able to think outside the box occasionaly
My 2c

 

That's fine but what good will it do? Also, I wouldn't call it hostile, more like annoyed that he is cross posting this across the forum. No one is responding and all he does is bump it every five minutes. I am tired of seeing the same exact post every where I go with the word bump or "doesn't anyone know?!?!?" on every response. It's no big deal but sometimes if you are going to be a pioneer you have to do it yourself. I haven't seen you post anything to help him, just something to question me. So what of that?

 

Hey EVOTEXAS calm down. You are getting bent out of shape for no reason. Just remember that new discoveries are made by people who are inquisitive and ask questions. The bumps are to keep it on the front page...just ignore it.

 

I wouldn't say I am uncalm. I am well aware what the bumps are for. And how is this a new discovery? LOL. Adjustable cam gears are sold because stock cam gears are not adjustable. If one tooth is 7.5 deg. then the minimum moveable amount is too much. What good is that?

 

Wait a sec, if you moved the gear counterclockwise, that would produce an advancement in engine timing because the spark will want to fire BTDC. If you moved the gear clockwise, you will retard the timing to later in the cycle, which would be closer to TDC, and i think that is what he wants

 

Thanks for the contribution to the discussion. I can sit here and reason out what I need to do but I rather have a straight answer from a person who knows for sure so my efforts are productive.

Thanks Andrew, I appreciate the kind words. BTW, I've got a super idea about this that you might like a lot. Let's talk about it and see if it will be of benefit...


Man, I don't know what the hell has gotten into you. I don't remember dissin' your mother or kicking your dog or anything like that. Why don't you just back off? You don't know me from Adam, you don't understand or know what I'm talking about and you are being an a$$ to me for no reason. If you don't like my questions or my posts, please don't read them and keep your useless criticisms to yourself. I'm not posting any opinions or bashing you or anyone else. I'm asking questions and if I'm out of line the moderators will close my threads and shut me up. I think you are way out of line with your hostility and aggression. You might think you are clever, but all you've shown me so far is your ignorance and boorishness. Please knock it off.

 

Interesting thread. Just read it today for the first time. Here's a pic of the Vishnu cam gears on my car set at -2 just for reference.

 

Great job Smoggie! That is really helpful. Thanks a lot. That clears up a big part of my question. Now, I like to know if there are some common numbers that can be used. for various cars with a reasonable chance of working as expected. My idea does not allow for such an easy way to adjust the cam gears as the conventional adjustable cam gears........

 

Your welcome. Keep up the good work and keep me toooned in to your findings.

 

Thanks again, I'll definitely let you know what I find out and if there is a way to re-use those stock cam gears you've got

 

Ignition timing is different from cam timing

 

I have helped silverevo8 on many occasions...I have tuned both of his cars on more than a couple of engine management systems and he remains a good customer of mine...
I think his topic is very interesting and worthy of different and varied opinions...in fact it sure beats the usual "what color evo do you drive?' thread
If you have cam gears, great....I have them also...and I sell them, but I feel more knowledge is needed among members in this area and I feel silverevo8's questions are only contributing to satisfying this need..
So thats "what of that"

 

haha thanks for clearing that up, see, ive been out of college a year and im already slipping up. i knew it sounded right but it didnt, then i got confused because i havent really done many vehicles that required this type of service. So sorry Silverevo8 for any confusion, but i honestly thought it was the other way around.