Installed the 720's and walbro 255lph

[Bigwilly6754]

Alight i just installed my fp green and 720's injectors and my 255lph fuel pump...Now I went to take it out and at idle the EGT gauge reads 750degress F at idle warmed up ....now while crusing it reads about 850F. Now if i try and WOT it falls on its face the turbo cant spool it just dies and almost wanted to stall!!! can anyone give me some tips?!?!

 

[echo]

you are running RICH!!!!.... do you have some sort of fuel management? an s-afc would be good, but with those big of injectors you should invest in something like dsmlink or a standalone. you need to get it tuned.

 

[nine5raptor]

I saw the afc on your list. tune that. do you have an afpr? with a hardwired 255, you need one.

 

[Bigwilly6754]

yes i have an afc... no i dont have a FPR but when i rev the motor and it comes back to idle it wants to stall??

 

[ChicagoGSX]

Originally posted by Bigwilly6754
yes i have an afc... no i dont have a FPR but when i rev the motor and it comes back to idle it wants to stall??

Too much fuel. The combination of 720cc injectors and a rewired 255 pump are causing your car to want to die. The lack of tuning is why your car falls on its face once the turbo starts to spool.

 

[nine5raptor]

Originally posted by Bigwilly6754
yes i have an afc... no i dont have a FPR but when i rev the motor and it comes back to idle it wants to stall??

either
1: fpr overrun
2: venting bov

either one will cause you to have too much fuel when then engine is under vaccuum.

 

[Kaane]

or 3, giant boost / vacuum leaks.

 

[nine5raptor]

3 would have the same symptom, but for a different reason. If you have vac. leak, you will have too much air causing it to be very lumpy and probably stalling. Tuning with the afc and 720's, though I doubt you have too little fuel.