Lotus Elan

Ignition timing taboo

PostPost by: terryp » Wed Oct 21, 2009 5:21 pm

I've always had a bit of a mental block with timing but reading through the archives here I think I have it sussed.
I've had a slight hesitation on pick up that may be due to timing. I've checked everything else
Now I know this will appear very basic to some but I've checked my timing with a timing strobe light at approx 750rpm and its about 8 degrees , if I want to try to advance a little say 2 degrees , which direction do I turn the distributor body and by approx how much i.e. as a approx measurement on the circumference of the body of the distributor.
Would 10 degrees be OK for Super unleaded + castrol additive?

Thanks

Terry
terryp
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1660
Joined: 29 Nov 2007

PostPost by: Frank Howard » Wed Oct 21, 2009 5:59 pm

Terry,

To advance the timing 2 degrees, the distributor must be rotated 4 degrees clockwise or about 2.65mm. It's best to use a timing light.
Last edited by Frank Howard on Wed Oct 21, 2009 6:10 pm, edited 1 time in total.
Frank Howard
'71 S4 SE
Minnesota
Frank Howard
Fourth Gear
Fourth Gear
 
Posts: 994
Joined: 30 Mar 2004

PostPost by: terryp » Wed Oct 21, 2009 6:02 pm

Thanks Frank I just had this mental block as to which way to turn!
I'll check it with the light after rotation.

Thanks again

Terry
terryp
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1660
Joined: 29 Nov 2007

PostPost by: andyelan » Wed Oct 21, 2009 6:12 pm

Hi Terry

I run my Plus 2 130/5 with 10 degrees advance on super unleaded with castrol additive and have no problems at all. In fact a week or two ago the local filling station had run out of super so I was forced to fill up with normal unleaded. The car still ran ok

Regards
Andy
andyelan
Fourth Gear
Fourth Gear
 
Posts: 555
Joined: 28 Feb 2008

PostPost by: terryp » Wed Oct 21, 2009 6:23 pm

Thanks Andy
I think the car was set up on a rolling road at 10degrees and then retarded because the PO was using standard unleaded. So back up to 10degrees it is and hopefully the little hesitation will go

Terry
terryp
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1660
Joined: 29 Nov 2007

PostPost by: tdafforn » Wed Oct 21, 2009 6:47 pm

had also noticed the same sort of hesitation..
tried playing with the timing on my 30yo distributor without much sucess..
Then (for other reasons) fitted a distributorless system (based on megasquirt)..
And the hesitation went away..
I think the problem was caused by scatter at low revs with a worn dissy!
(now running at 10 degrees on super UL when I can get it..)
Tim
1972 +2S130
User avatar
tdafforn
Fourth Gear
Fourth Gear
 
Posts: 867
Joined: 12 Sep 2003
Location: Kenilworth Warwks.

PostPost by: terryp » Wed Oct 21, 2009 6:53 pm

Thanks Tim ,my dizzy is about 20000 miles old and is of the newer 45?? type.
Fingers crossed the 2 degrees will sort my hesitation out too

Terry
terryp
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1660
Joined: 29 Nov 2007

Total Online:

Users browsing this forum: No registered users and 11 guests