Author |
Topic: Fine Timing chain Tuning (Read 688 times) |
|
NACARB
Newbie
I'm a YaBB newbie!
Posts: 10
|
 |
Fine Timing chain Tuning
« on: Jul 4th, 2020, 9:47pm » |
 Quote  Modify
|
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
|
|
 IP Logged |
|
|
|
Torbayboy
Full Member
Posts: 848
|
|
Re: Fine Timing chain Tuning
« Reply #1 on: Jul 5th, 2020, 7:23pm » |
Quote Modify
|
B O A is granada engine, this is Scorpio website.
|
|
IP Logged |
Cosworth Scorpio only 46 on the road now NOW down to 42.
|
|
|
NACARB
Newbie
I'm a YaBB newbie!
Posts: 10
|
|
Re: Fine Timing chain Tuning
« Reply #2 on: Jul 14th, 2020, 5:49pm » |
Quote Modify
|
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 )
|
|
IP Logged |
|
|
|
Torbayboy
Full Member
Posts: 848
|
|
Re: Fine Timing chain Tuning
« Reply #3 on: Jul 14th, 2020, 6:25pm » |
Quote Modify
|
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
|
|
IP Logged |
Cosworth Scorpio only 46 on the road now NOW down to 42.
|
|
|
NACARB
Newbie
I'm a YaBB newbie!
Posts: 10
|
|
Re: Fine Timing chain Tuning
« Reply #5 on: Aug 18th, 2020, 12:20pm » |
Quote Modify
|
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.
|
|
IP Logged |
|
|
|
NACARB
Newbie
I'm a YaBB newbie!
Posts: 10
|
|
Re: Fine Timing chain Tuning
« Reply #6 on: Oct 8th, 2020, 12:45pm » |
Quote Modify
|
that is the part I was speaking about.
|
|
IP Logged |
|
|
|
NACARB
Newbie
I'm a YaBB newbie!
Posts: 10
|
|
Re: Fine Timing chain Tuning
« Reply #7 on: Oct 8th, 2020, 2:58pm » |
Quote Modify
|
I also made special tools, in oder to set the camshafts in the right position
If anybody wish to reproduce them I can give the DXF file, which can be given to a laser cut factory.
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print
