i need to know what jet sizes you guys are running for 125 shot, I have a stock fuel system with no booster pump. Thanks in advance.

 

I know some of you run the zex dry kit come on now.

 

i cant remeber exactly what the numbers were but i picked this up using the SEARCH fuction

75 HP will need #40 nitrous jet and #82 fuel jet.
100 HP will need #46 nitrous jet and #78 fuel jet.
125 HP will need #52 nitrous jet and #73 fuel jet.

 

I searched for 4 hours bro those numbers just dont seem right? Im running a 52 nitrous jet with a 34 fuel jet and it just dosnt seem to be rich? wouldnt a 72 fuel jet lean it out big time?

 

no i believe those numbers are right.

IIRC the jets that i used were 50 somthing and 70 somthing , lol i wish i had my instructions in front of me

but yea that seems about right to me

ill do a little more search and c what i can come up with

 

That would be awesome! Also do you know what fuel pressure I should be looking for when the nitrous is flowing? I am still on the stock fuel system.

 

your gonna need a 255lph fuel pump

not sure about the fuel pressure

 

I have been spraying it all weekend with the #52 nitrous jet and #34 fuel jet with no fuel issues wouldnt the #72 fuel jet put less strain on the pump?

 

http://www.zex.com/Base/Instructions/ZEX130.pdf

thats the install instructions, jet sizes are on the last page

for the dry system all of these are correct

75 HP will need #40 nitrous jet and #82 fuel jet.
100 HP will need #46 nitrous jet and #78 fuel jet.
125 HP will need #52 nitrous jet and #73 fuel jet.

to run the 125 shot (or even the 75) you are going to NEED either the booster pump or a 255lph

the stock fuel pump cant flow well at higher fuel pressures, ull end up running way lean. You probably already are u just dont know it. Running lean = KABOOM.

My reccomendation to you , is if u want to use nitrous do it right!

second if you are running teh 125 and u have not done so already u will also need 1 step colder plugs gapped at .35 (NGK TR6s are great)

thats about all i have to offer, good luck with whatever u do

 

I will order a walbro 255lph from ape and go with the correct jets. Thanks for all your help.

 

good luck man , hope u enjoy

or and ur sig says u have 2.73s

id def look into 3.42s- 3.73s

night and day diff ull pick up a bunch of time at the track as long as u hook

 

Yea 373's will be my next mod along with drag radials, headers and an ory. I should be happy after that.