Spark Plug Gap

[s!ke]

I have Autolites 3923's and I wanted to know what is the appropriate gap for stock boost, although I do have a shimmed wastegate.

Also, when I set my timing, is it true that if you advance your timing, you feel a lot more power? Like 15 over? 12 maybe?

Thanks in advance for everything

 

[Piratetip]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=IG&P=8
Be sure to use a wire gapper.
7M-GE 1.3mm-.051"
7M-GTE 1.0mm-.039"

 

[bountykilla0118]

umm once u up the boost up to 14 or so i would bump the gap down to about 28-29

 

[drjonez]

umm once u up the boost up to 14 or so i would bump the gap down to about 28-29

why?

i've had 0 problems running a .030" gap on 20+ PSI for years. then again, it all depends on ignition system condition and tune.

as for increasing base timing, i wouldn't recommend it....

 

[Doward]

Don't bump your timing.

I run .032" gap. Zero problems with spark blowout when running a 57 trim to 16psi.

 

[bountykilla0118]

I was having a little bit of spark blow out ..... and I was advised to lower the gap and it worked. There have been many post with people lowering their gaps.............

 

[quake]

I was having a little bit of spark blow out ..... and I was advised to lower the gap and it worked. There have been many post with people lowering their gaps.............

15+ years on that ignition system make sure the ignitor is well grounded

 

[Kylar27]

why?

i've had 0 problems running a .030" gap on 20+ PSI for years. then again, it all depends on ignition system condition and tune.

as for increasing base timing, i wouldn't recommend it....

30 is pretty close to 28 and 29

I think he meant to lower it from the stock of 39 if you are running higher boost.

 

[bountykilla0118]

30 is pretty close to 28 and 29

I think he meant to lower it from the stock of 39 if you are running higher boost.

yea pretty much .....