dialling in cams (vernier gear) - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-16-2004, 09:02   #1 (permalink)
Registered User
 
Join Date: Jun 2004
Posts: 118
dialling in cams (vernier gear)

We hear a lot of talk about improving performance with various aftermarket cams. I wonder how much extra performance could be obtained by simply dialling in existing cams to tdc of the valve openings. Just some food for thought. As previously mentioned, manufacturers simply dont have the resources to do this at the factory. Shane
FAIRMONTAU2 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-16-2004, 21:45   #2 (permalink)
Experimental Racer#6
 
TIKFD6's Avatar
 
Join Date: Nov 2000
Location: Wodonga Vic
Age: 41
Posts: 8,204
Re: dialling in cams (vernier gear)

I was going to go down this line myself, optimising the factory cam before i went the next step and put in an aftermarket cam.
It would be interesting to see if anyones dont it.

Crow is selling their Vernier gears for $120 at the moment, so if you want one be quick.
TIKFD6 is offline   Reply With Quote
Old 07-17-2004, 15:49   #3 (permalink)
Registered User
 
Join Date: Feb 2003
Location: Sydney
Age: 54
Posts: 629
Re: dialling in cams (vernier gear)

I spent a lot of time dialing in my DEV3HL and tried a numer of settings from 0.010", 0.020", 0.035", 0.050" lift at the cam ATDC. It was an interesting excercise and I can see how you could explain those really good freak cars you see out there. Particularly some of the AU XR6's non VCT engine cars that do really seem to go well with stock cams.

All cams will respond a little differently but with the DEV3HL at .010" it lost all low end and mid range was flat but it kicked in very hard around 3500 and wanted to rev right to the rev limiter with a big rush. set at 0.050" the low end was the same as stock the mid range quite beefy and it wanted to rev to redline and pulled well to the rev limiter. At the 0.035" the cam spec recommended setting it was a good compromise and the best setting with no noticeable on cam feel at 3500 and a rush to the rev limiter.

Overall the idle, low end and mid range response changed the most in response to cam timing with the 4000-5500 range all feeling pretty similar.
jonbays is offline   Reply With Quote
Old 07-17-2004, 16:33   #4 (permalink)
Registered User
 
OED666's Avatar
 
Join Date: Apr 2003
Location: Brisbane
Age: 32
Posts: 1,512
Re: dialling in cams (vernier gear)

i was talking to a friend about this earlier this year, and he said if your cam is "dialled" in correctly you can pick upto 20hp...
__________________
BUILT FORD TOUGH!!!

94 ED Futura
PROUD TQE OPERATOR
13.822 @ 99.67MPH - Willowbank 05/08/2006
OED666 is offline   Reply With Quote
Old 07-17-2004, 22:29   #5 (permalink)
Registered User
 
madmelon's Avatar
 
Join Date: Apr 2003
Location: Shire :D
Age: 29
Posts: 439
Re: dialling in cams (vernier gear)

So how do u "dial in" a cam? what does it involve? Who does it in sydney? (do u need a dyno?)
madmelon is offline   Reply With Quote
Old 07-17-2004, 22:48   #6 (permalink)
RIP Sox.....
 
Soxx's Avatar
 
Join Date: Dec 2002
Location: Sydney
Age: 45
Posts: 2,580
Re: dialling in cams (vernier gear)

Quote:
Originally Posted by madmelon
So how do u "dial in" a cam? what does it involve? Who does it in sydney? (do u need a dyno?)
Anyone one can do it.
You need to know how to use a clock, find 'true' TDC, and either know the cam specs and what the cam grinder suggests as the right position, or spend an hour or so on a dyno.

It is fiddly to do it properly and accurately.

If you have know idea what I just said above, then don't bother attempting it yourself.

Rick.
__________________
4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?
Soxx is offline   Reply With Quote
Old 08-05-2004, 23:11   #7 (permalink)
-
 
Join Date: May 2002
Location: Melbourne, Victoria
Age: 33
Posts: 1,675
Re: dialling in cams (vernier gear)

rick, any ideas where i can read more on this? im presuming just getting TDC based on the timing mark on the balancer isnt accurate enough, so how can the mark be checked for accuracy?

Jase
galapogos01 is offline   Reply With Quote
Old 08-05-2004, 23:27   #8 (permalink)
RIP Sox.....
 
Soxx's Avatar
 
Join Date: Dec 2002
Location: Sydney
Age: 45
Posts: 2,580
Re: dialling in cams (vernier gear)

Email me a reminder and an I'll see if I can post up some detail on how to do it tonight.

Rick.
__________________
4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?
Soxx is offline   Reply With Quote
Old 08-06-2004, 06:08   #9 (permalink)
RIP Sox.....
 
Soxx's Avatar
 
Join Date: Dec 2002
Location: Sydney
Age: 45
Posts: 2,580
Re: dialling in cams (vernier gear)

How to dial in a cam.

First thing we need to establish is whether the harmonic balancer is showing true TDC, as it is quite common for the outer ring to slip with age.
There are several methods for finding TDC, but this is probably the easiest way for a beginner.
Screw a bolt into number 1 spark plug hole with the end of it protruding (say) 10mm down the bore.
Wind the engine over by hand (gently) until the piston hits the bolt. Make a mark on the harmonic balancer at the TDC indicator. Now wind the engine over backwards until the piston hits the bolt again. Make another mark on the harmonic balancer. Now, the point exactly between the 2 marks you just made on the balancer is true TDC, make another 3rd mark, this may be on top of the mark which is already in the balancer. Simple.

Now that we have found TDC we can move onto adjusting the cam.

You will need a dial indicator for this, and you also need to know (from the cam grinder) the 'lift @ TDC' figure, which might be (say) 0.040".

You will need to set up the clock so it measures the movement of number 1 intake valve, this is very critical and accuracy is important here.
Adjust the clock so it reads zero when the valve is closed, slowly wind over the engine by hand until you reach TDC. The valve should have started opening and you will have a reading of 0.030" to 0.050" depending on how close the cam is set up to ideal.
If it's perfect straight away, you don't need to go any further.
If it's out by more than 0.001" either way, you will need to move the cam either by the use of the your newly fitted vernier gear.

That's about it for now, I may have missed some minor details as I'm just trying to remember all of this from the top of my head, so if anyone can fill in the gaps, go right ahead.

If you also have any questions, fire away.

Rick.
__________________
4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?
Soxx is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vernier Cam Gear Nipper Trans | Driveline 18 09-02-2003 04:51
vernier cam gear dinga Trans | Driveline 3 08-18-2003 00:52
mystery rocker gear dinga General Tech 5 03-25-2003 00:49
Torque and Horsepower 211 General Tech 9 06-21-2002 04:23
Vernier Cam Gear Nipper Inline 6 Tech 0 05-29-2001 17:18

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 13:46.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.