I have a gsr bottom end with 82mm 12:1cr pistons with b16 head, gsr cams, rest of the head is stock. It will be done at the end of this week, and my question is this. I have read that the "JUN" and "mugen" chipped ecus add alot of timing. I have ran my "jun" chipped computer on a few different stock motors and have done fine, but now that im getting into more compression im worried about it being to much until i can get it tuned. Any was i can retard the distributor to compinsate for it? Or should i get my buddy to put a chrome basemap on it? If so which map P30 or P72? Any help is appreciated, trying to learn about this. Thanks


Modified by DarKStaR5 at 1:11 AM 5/5/2008

 

Retarding your distributor timing to 12 deg btdc should be enough until you get the setup tuned. Just run premium 91-93 oct & listen for knocking until you get tuned or get your self a better basemap.

Otherwise, you may want to consider using a basemap from a simular build. Your base ignition timing, engine management system choice & more are major factors to consider when playing with ignition timing.

If your not planning on having the setup tuned, you should consider a wideband oxygen sensor system such as the innovate lc-1 db gauge system & possibly a tunable engine management system such as hondata s300 etc

 

I will be running 93oct, if i set it to 12 deg btdc, does this mean i need to take it easy? I was really wanting to put some cams in before i got it tuned.

So would i be better off putting a p30 or p72 basemap on, or finding someone with a setup similar and maybe getting their map?

 

a p30 basemap is for a b16a and you clearly don't have a b16a. A P72 basemap would be a better place to start.

 

Yea i was leaning torwards that one more, and just change the vtec engagement point, and maybe a few other things.

 

anybody else with some suggestions?