upping boost

williamsGN

'Horse sneeze' addict
Running 21 psi on my combo, was wanting more, have 750 O2 now, would I need a bigger injector than 42 and would the walbro 255 support it ?
 

williamsGN

'Horse sneeze' addict
Walbro 255, 206/206, ported heads/intake, 42 lb, turbonetics BB 61, Duttnecked IC, .030 over, TT Chip
 

TType85

Well-Known Member
What fuel are you running? Do you have a Alky kit? Theoretically the 255 pump should flow enough for 500hp on gas but you would probably be out of injector before then.
 

TType85

Well-Known Member
I would say the 42# injectors are going to be your next limiting factor. Do you have a powerlogger? Can you see what your injector duty cycle is?
 

TireFryer

The New Kid
Get a set of 60-80 pound injectors. Like mentioned, 255 is good to 500 hp. Not sure on a 5.7 car but on my 6.1 chip I have a wot afr of 10.4:1 which is a bit rich. Over 800mv on the NB.
 
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Mr.Spool

Well-Known Member
92 pump gas. Alky kit
42lb injectors and a single nozzle and an I tank pump should do 25+psi on your combo.
You need to see fuel pressure and methanol pressure in real time to verify the fuel system is working properly.
If the chip was burned with 25psi and your at 750mv now something is off.
Eric is not off on his fueling usually.
You can add and should wot fueling in the chip but if the pump or alky system isn't working properly then it cant add
 

RichieRocket

New Member
Take a pic of the chip and post it here. You could also just look at what paperwork was sent with it but there could always be a mixup so a pic of the chip is most accurate way for folks to help.
 
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