Hey guys :
i recently went to the workshop to check my timing since i don;t have a timing gun , they advanced my timing from 14 to 18 , the low end and mid range feels better , but i flet a loss power top end, it just doesn;t pull as hard as before, the fuel i'm running is 98 octane . my motor is 98 spec jdm b18cr with AEM CAI + customer b pipe + spoon n1 cat back, going to drag next week, last time when i went there with ignition timing at 14 degree, i hit 101.3 mph and a pretty good time for a **** 60 ft time+ **** street tyre. so i need some advice here, do u guys think my car will be faster or slower? should i retard the timing back ? Also for some reason , my idle stays at 1100rpm when it warmed , turned the screw al the way in doesn;t help at all . cheers

 

Uhm, wow... 1100rpm warm idle?

I personally think people shouldn't be messing with anything, especially the timing of the motor without a dyno to see where the adjustments are going. There's really no way for anyone to give you an absolute answer to your question man. Just run it and report back...

 

why are you running 98 octane?
18 degrees is fine.
dont touch the idle screw unless you know what the F you are doing.
never trust the butt dyno, get on a real dyno.