I have a 71 International Scout that came stock with a gear drive, kinda cool; however if I was going to change the Camaro over to something (which I am debating) I would go with one of belt set-ups, weighs less, percise timing and not less vibs.

 

Seriously I can appreciate all of the feedback and suggestions....But has ANYONE actually had a gear drive on a TPI setup and had to go thru emissions?

 

3GTA, go back and read my post.

IF (and that's IF) the gear drive did happen to set off the knock sensor, you can easily modify the filtering of the knock sensor within the eprom. You can make the knock sensor as deaf or as sensitive as you like within the eprom.

On many high mileage L98 engines (and some not so high mileage), I find the Knock Sensor is more of a pain in the butt in WOT and reduce the amount of Knock Retard (when in WOT) to only 1* (so I can see it on my scan tool). In normal cruise, then I let the KS work.

I have found in tuning the KS can rake havoc with the spark curve and actually cause detonation to occur far sooner than if I just limit it to 1* and have a nice smooth spark curve. Then, I can run more spark advance and get even more power. By controlling the spark curve, I can sometimes get as much as 20 extra HP at the wheels.

You're worrying a lot about nothing. Just do it. And IF the KS becomes a problem, then deal with (by adjusting the KS in the eprom). Then you can grab some extra HP while you are at it by working on your tune in the eprom also.

And before someone says "Glenn is pro-gear drive", I am not. I personally find the noise irritating. But I'm over 50 and like to listen to my stereo. But, it's not my car, it's your car, and you wanted advice on how to deal with it. So here it is.

 

Thanks I will find out Friday one way or another.....and this engine has about 600 miles on it. So High Mileage it is definately not as a matter of fact this wasn't even a TPI engine....But with alot of intake mods it is now.....

Tomorrow is safety inspection and title, Friday is Emissions. If the Gear drive doesn't get me, The Cam might.....I am crossing my fingers it is fairly mild so lets hope.

 

Being cocky isn't the best way to ask for help, just so you know.

The primary use of a gear drive is accurate camshaft timing. Evena brand new "high quality" chain will fluxuate the cam centerline +/- 1 to 2 degrees. On a really old factory chain, you'll see the cam retard about 3 degrees.

A gear drive will keep your camshaft to crank centerlines static, with no fluxation. But I got a feeling that since you don't know exactly why you want a gear drive, you also have absolutely no idea about cam timing, so whats the point?

-- Joe

 

Agreed. Loud exhaust, blower noise, etc = not cool in my book.

-- Joe

 

Well said. I couldn't figure out how to say the last part and not sound like an @ss.

 

Well Said, obviously you misread my response
before you bad mouth someone you should try understanding what they are saying.....
First I thanked him.....(oops maybe I shouldn't have done that)
Then I said I will find out one way or another.....Which goes back to MY Original Question..............

Thirdly you have no idea what I do or do not know about gear drives....."A gear drive will keep your camshaft to crank centerlines static, with no fluxation" Which thank you has absolutely nothing to do with my original question! But hey if your just here to throw up posts I understand.

 

One can only assume based on the nature of your question.

You started with the attitude when madmax answered your question truthfully. You baited yourself, deal with it. I answered honestly, so when in 6 months someone searches about gear drives, they will find this thread.

The gear drive should be the least of your worries. You're obviously not tuning this car, or you wouldn't be asking if the gear drive affects emissions, you would be looking at the log.

-- Joe

 

We know.

You came in here and asked a question. For every answer you were given, you countered it with a smart *** comment. If you knew all the answers to begin with then you shouldn't have asked. Now you are being made fun of. Do not pass go, do not collect $200.

 

This thread still hasn't died yet?

 

True If I could log I wouldn't be asking now would I? So are you saying you talk trash to everyone that can't or doesn't Data Log? I was under the impression these boards were designed to help people that had a problem and needed an answer. Not bash on them because they are asking questions....Maybe you are in the wrong Board.......

 

IB4TL !!!!!!!!!

 

We are helping people. You don't like the answers. Glenn went into much detail. You ignored it. Another member recommended you check knock counts, you ignored it. How much more "help" do you expect?

Again, in 3 months when someone is searching for an answer, they will find this thread. Perhaps we will have "helped" them, even if we didnt you.

I, as well as anyone else here, would be more than happy to help you the second you start listening and back off on the attitude.

-- Joe