nitrous questions

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shomtx95

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been running zex 75 dry shot for a pretty good while now(p/n 82011 i think) with no problems, but i cant seem to remember what i gapped my plugs to, i have searched with no results and was wondering what you guys think, i am running autolites 2 heat ranges colder, also what is needed for a 100 shot, what jet sizes do i need, i have a 155lph walbro is this enough, do i need 3.2 injectors? replies are greatly appreciated.
 

AREA 91

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I gap my autolite 3923 plugs at .032-.035 For reference stock is autolite 3924 gapped at .042-.046

This is the jet chart directly from the zex website:

EFI DRY SYSTEM HP JET CHART
4 CYL
FUEL / N2O 6 CYL
FUEL / N2O 8 CYL
FUEL / N2O
55 HP: 36 / 32 36 / 32 -
65 HP: 34 / 35 34 / 35 -
75 HP: 32 / 38 32 / 38 43 / 40
100 HP: 26 / 46
SEE NOTE #2 26 / 46
SEE NOTE #2 40 / 46
125 HP: - - 34 / 54
 
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92sho16

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so i need a 26 fuel and a 46 n2o?

I dont have any expierence with nitrous but according to the chart posted those are the jets needed for 100 hp of nitrous. You shouldn't need 3.2 injectors, there have been alot of people you have just run the zex system with colder plugs and haven't had any issues. Ive seen some people run a nitrous tune but i don't think that it is necessary, purchasing a wideband O2 sensor would be a good idea.
 

shomtx95

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so nobody knows what i need to run a hundred shot, come on guys i know some of you have run a 100 shot. do i need a 190lph pump or bigger injectors???
 

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I gap my autolite 3923 plugs at .032-.035 For reference stock is autolite 3924 gapped at .042-.046

This is the jet chart directly from the zex website:

EFI DRY SYSTEM HP JET CHART
4 CYL
FUEL / N2O 6 CYL
FUEL / N2O 8 CYL
FUEL / N2O
55 HP: 36 / 32 36 / 32 -
65 HP: 34 / 35 34 / 35 -
75 HP: 32 / 38 32 / 38 43 / 40
100 HP: 26 / 46
SEE NOTE #2 26 / 46
SEE NOTE #2 40 / 46
125 HP: - - 34 / 54


You need to use zex jetsfor this. #26 for the fuel and # 46 N2O

Have fun.:evilgrin:
 

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