If your mechanically inclined you can change you cam gears your self otherwise pay someone to do it. To adjust them only do it on a dyno or a gtech or if you know what your doing you can use a compression tester. If you use the compression tester this is a general how to "tune" cam gear:
Get a base pressure across the board and then adjust one gear at a time. Start with the intake gear and adjust it one direction say 2 degrees then check compression again, if it went up then your going the right way if it went down then you went the wrong way. Once you found out the direction that raises the compression go 2 more degrees and check it again if it went up again you can adjust it some more. i stopped at 6 degrees. Once you found where you have your intake adjusted where you get max compression then start on you exhaust. :note, you wont see as much increase with the exhaust side as the intake side. Do the same with the exhaust as the intake, me I advanced the exhaust cam 2 degrees and retarded the intake cam 6 degrees for max compression. I started out with my compression at 168psi as an average and ended with 187psi as an average so if that helps out at all there you go.
wow, is there any danger to doing it this way?
I've never tuned cams b4 and i've only heard of doing it on the dyno. Is the purpose of the cam to increase the compression? Sorry for the dumb questions. good job
yeah you are closing the gap of time that both valves are open, and its safe as long as you know what is too far, we have non interference engines, so the pistons will NOT hit the valves, that is good but i read some where on here once that the intake valve could hit the exhaust valves, i dont know if there is any truth in that, but i went 2 and 6, i probably could have gone more but i didnt want to chance anything....so what i went is safe, i ran it for over 2 years....
K I have never used a GTECH before, but my friend has a new one. I am assuming it will show me a graph that I can tune them with? This would save me from going to a dyno for sure.
K I have never used a GTECH before, but my friend has a new one. I am assuming it will show me a graph that I can tune them with? This would save me from going to a dyno for sure.
i have never used one so i dont know, but it messures your hp so im sure you could go off of that, and no i didnt have a wide band, i had a stg 2 and was already running a 9:1 af and still had ecu controlled boost my dyno after they were adjusted stilled yelleded a 9:1 af so no worries for me....
K I have never used a GTECH before, but my friend has a new one. I am assuming it will show me a graph that I can tune them with? This would save me from going to a dyno for sure.
i have never used one so i dont know, but it messures your hp so im sure you could go off of that, and no i didnt have a wide band, i had a stg 2 and was already running a 9:1 af and still had ecu controlled boost my dyno after they were adjusted stilled yelleded a 9:1 af so no worries for me....
Oh I assumed you had used a GTECH before since you said it can be done in your first post....
Quote: Originally Posted by fibersrt
To adjust them only do it on a dyno or a gtech or if you know what your doing you can use a compression tester.
I would think you could due to it showing your hp and tq curve, but have no idea.
considering you wont break anything doing that as its not a honda get the gtech going and see if it really helped. i sold my cams when i got caught by the cops. i might as well put my gears back on.
__________________
2004 Black. SSTv1, Stage 2 with toys, 3" exhaust with cat, Slow4DR shifter, CBD vented hood.
well i gained almost 20psi in each cyl, and it was a noticable difference on the streets, but when i started partin the car, i took the stg2 out and the stock computer did not like the adjusted cams one bit, so i put the cam gears back to stock and it ran fine...just an fyi...the stg2 2 comp loved it but the stock one didnt.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
How-To: Tune Cam Gears
Linear Mode
