The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: compressorman on 26.04. 2014 16:43

Title: ignition timing
Post by: compressorman on 26.04. 2014 16:43

Hi all
 i would like to call on someones knowlege here if i can
my problem is that i have just re built my 58 gf with 7 5 1 pistons,spitfire cam,manual mag but have retained the iron head for now
do i set ignition to standard settings or that of an rgs?or indeed one of the other models
regards
ian

Title: Re: ignition timing
Post by: trevinoz on 26.04. 2014 22:28

Ian,
             I would try 5/16" as a starting point. Check out Orabanda's posts on dyno testing.

Trev.

Title: Re: ignition timing
Post by: muskrat on 26.04. 2014 22:32

G'day Ian.
I'd stick with std or slightly retarded timing with those pistons. The 357 won't make any difference to the timing but will move the sweet spot higher in the rev range.
Cheers
Just saw Trev's post. 5/16" would be close. It also depends on the fuel used.