hey guys, i finally got my crx d15b vtec boosted.... its running a 12:1 vortech FMU ( i know terrible management) boost pulls great until you hit the pedal too the floor, all the way to 3/4 pedal is great. any ideas?

 

no fuel, its running lean

 

any pinging ?, what kind of fuel pump are you running ?.what is your timing set at ? you certain there are no boost leaks ?.you check your plugs for any sign of detonation, do you hear anything?. and please tell us your using at least 93 octane.

 

hondata all they way, dont starve your car like i use to. i have a fpr that might help a lil im selling for cheap like 35. and yes like stated above make sure your using 93.

 

no pinging at all, so i figured its not detonation, stock fuel pump and stock timing. i was thinkin of getting msd btm? i think its called, the boost timing per lb. of boost.... im not sure though, im sure its time for a new fuel pump being that i havent ever changed it

 

detonation isnt always audible, you need to check your plugs and see whats going on. you definitely need a better fuel pump, if your not using an inline fuel pump to flow more fuel(an intank 255 fuel pump with hondata and some bigger injectors would be best), your gonna blow some shit up.the stock pump alone will not do, you need something else to help your pressure go up pre-fuel rail insertion since your running stock pump and stock injectors and havent upgraded to a bigger injector. less pressure,less duty cycleand more fuel is the real goal but since your running everything stock you need to boost pressure first off. and you really need to retard your timing at least 2-4 degrees or your gonna hear some chitty chitty bang bang pretty soon.

 

Yup, you're leaning out.

 

just dont floor it

 

1.get some DSM 450's
2.Get atleast a 190,or 255 LPH fuel pump
3. Get a Uberdata tune for right now..uberdata is free..just find someone who knows how to use it..its the same as hondata,with little variations in the two programs.
4.get the car dyno tuned..that way u can see your A/F's,and check your ignition timing,also check your valve timing.

 

What boost pressure does it reach at full throttle, and are you using the stock Honda MAP sensor?

It's possible that you've maxed out your injector's flow capacity also.