Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> How to do things! >> Fine Timing chain Tuning
        
(Message started by: NACARB on Jul 4^th, 2020, 9:47pm)

Title: Fine Timing chain Tuning
Post by NACARB on Jul 4^th, 2020, 9:47pm

Hello,
Maybe you tried to set the timing chain after having
renewed engine or simply changing the timing chain and you don't find the good tuning ?
It is what happened to me when renewing a BOA engine with BOB camshaft.
The only adjustement seems to be to change the chain from 1 tooth to the next one.
But sometimes it is to much or not enought

I found a solution, not vey difficult if you know how to do a special washer.

In fact the adjustement is possible because in the normal condition there is a washer with a center hole who made the connection between the drive plate and the camshaft sprockets.
So if you made the washers with an eccentric hole, you can modify a little bit the timing.
See my picture with 2 differents washers on the right and in the middle and the stock one on the left

Title: Re: Fine Timing chain Tuning
Post by Torbayboy on Jul 5^th, 2020, 7:23pm

B O A is granada engine, this is Scorpio website.

Title: Re: Fine Timing chain Tuning
Post by NACARB on Jul 14^th, 2020, 5:49pm

I'm so sorry.... but what I was trying to share is also relevant for BOB engines.
And in France the car where the BOA was fitted was called Scorpio ( the Granada end's here in the meddle of 80's )

Title: Re: Fine Timing chain Tuning
Post by Torbayboy on Jul 14^th, 2020, 6:25pm

Fair 'nuff didnt mean to be rude just assumed it was a UK enquiry & lots break our lovely cars to put the motor in lesser things
:):)

Title: Re: Fine Timing chain Tuning
Post by Tompion on Jul 14^th, 2020, 7:31pm

Should it be of use there is a page on the site relating to this with finis codes for the washers:

http://www.fordscorpio.co.uk/idleprob.htm

Dave

Title: Re: Fine Timing chain Tuning
Post by NACARB on Aug 18^th, 2020, 12:20pm

Yes that's a good page. The part I'm speaking about are the "inserts", number 9 on the diagram. It's this part that I modified, by drilling a exenctric hole for fine tuning.
I wished to insert picture as I promised in my previous post, but for the moment I'm not able to. I follow advise gived in the Forum but it use PhotoBucket and I don't ( because in France it's not free ).... I will try with another one.

Title: Re: Fine Timing chain Tuning
Post by NACARB on Oct 8^th, 2020, 12:45pm

that is the part I was speaking about.
http://nsm09.casimages.com/img/2020/08/18//20081802274225596516970809.jpg

Title: Re: Fine Timing chain Tuning
Post by NACARB on Oct 8^th, 2020, 2:58pm

I also made special tools, in oder to set the camshafts in the right position
http://nsm09.casimages.com/img/2020/08/18//20081802274725596516970810.jpg

If anybody wish to reproduce them I can give the DXF file, which can be given to a laser cut factory.