ISSUES W/ 347

[dragin92gt]

my coupe that was on here being built a few months back, is having issues.
about a month ago i put the recently aquired, NEW, 42 lb injectors in, along with the calibration tube. it has a 255lph pump, fuel psi is at 38 lbs.
the issue it with the timing. since i aquired the car, and before, the timing was at 18 or a little above on timing. so i gotta thinking and figured i should kick it back to 16. and the car runs quite a bit different.
it gotta new comp. chain when it was out, installed straight up,

is it a bad thing to run that much timing it this ******or

 

[ShortThrow50]

i run 14 degrees in mine. i have a similar setup. im runnin 10.5.1 compression 347 with 42 pound injectors. I have thought about bumping to 16. i wouldnt run 18. I have long tubes with flowmaster 40 mufflers so its kinda hard to hear any detonation.

 

[90lxcoupe]

if it dosent detonate then you can run that much timing, but 18 degrees is awful high, are you sure you balancer is marked right? also, is your timing pointer accurate?

 

[Grn92LX]

18* isn't at all close to being high. Run good gas. Just have to be sure thats the sweet spot. usually 16-18* is the sweet spot for aluminum head cars.

 

[dragin92gt]

i honestly didnt know that about the aluminum headed cars. when i moved it down to 16 it ran pretty ****ty. i also need to set the tps. the idle tends to hang at x. could i actually take somemore fuel psi out of it? id imagine that it needs to be at 38-39 and then the puter will take and add as needed.

thanks yall

 

[ShortThrow50]

i honestly didnt know that about the aluminum headed cars. when i moved it down to 16 it ran pretty ****ty. i also need to set the tps. the idle tends to hang at x. could i actually take somemore fuel psi out of it? id imagine that it needs to be at 38-39 and then the puter will take and add as needed.

thanks yall

yeah, set the tps first. I run about 39 psi and im a little rich at idle of course. I just rely on the computer to do its magic while driving. Im not having any eratic conditions while cruising or accelerating. Im thinking about having a chip burned during the winter sometimes to get rid of the rich condition. I would really back off the fuel pressure any for now. What type of mass air meter do you have? I run a 75mm pmas unit.