Are The Zex Wet Kit Jets Making The Advertised WHP!
#1
Are The Zex Wet Kit Jets Making The Advertised WHP!
Anybody out there using the Zex Wet Kit that has dynoed there car and did'nt get or come close to what it is suppose to make. I dynoed 3weeks ago and with my 75shot I only made 58 to the wheels.
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#5
Also, it depends on what size jet you have installed. Just b/c it's a 75 shot jet, doesn't mean it's the same size jet for every kit. Some kits are based on different bottle pressures and that will change the required jet size in order to get a 75 HP shot. Also, some are at the flywheel and some are at the wheels. But most claim whp since that's what the customers want. It really shouldn't matter. All that matters is the size of the jet you put in their along with the bottle pressure.
The Dynotune kit uses a size 42 nitrous jet for the 75 shot with 950 psi bottle pressure.
The Dynotune kit uses a size 42 nitrous jet for the 75 shot with 950 psi bottle pressure.
#7
Also, it depends on what size jet you have installed. Just b/c it's a 75 shot jet, doesn't mean it's the same size jet for every kit. Some kits are based on different bottle pressures and that will change the required jet size in order to get a 75 HP shot. Also, some are at the flywheel and some are at the wheels. But most claim whp since that's what the customers want. It really shouldn't matter. All that matters is the size of the jet you put in their along with the bottle pressure.
The Dynotune kit uses a size 42 nitrous jet for the 75 shot with 950 psi bottle pressure.
The Dynotune kit uses a size 42 nitrous jet for the 75 shot with 950 psi bottle pressure.
#9
42N/24F for the 75 shot on 950 psi for the Dynotune Kit.
But, the bottom line is, nitrous is nitrous. As long as your bottle pressure is correct and your feed lines and solenoids can handle the particular shot you are using, you can use any calculator out there to get the desired HP level you want.
So Dynotune says to use a 42 sized jet for the 75 shot, which will spray more nitrous than the 40 jet under the same pressure.
But, the bottom line is, nitrous is nitrous. As long as your bottle pressure is correct and your feed lines and solenoids can handle the particular shot you are using, you can use any calculator out there to get the desired HP level you want.
So Dynotune says to use a 42 sized jet for the 75 shot, which will spray more nitrous than the 40 jet under the same pressure.
#10
#11
42N/24F for the 75 shot on 950 psi for the Dynotune Kit.
But, the bottom line is, nitrous is nitrous. As long as your bottle pressure is correct and your feed lines and solenoids can handle the particular shot you are using, you can use any calculator out there to get the desired HP level you want.
So Dynotune says to use a 42 sized jet for the 75 shot, which will spray more nitrous than the 40 jet under the same pressure.
But, the bottom line is, nitrous is nitrous. As long as your bottle pressure is correct and your feed lines and solenoids can handle the particular shot you are using, you can use any calculator out there to get the desired HP level you want.
So Dynotune says to use a 42 sized jet for the 75 shot, which will spray more nitrous than the 40 jet under the same pressure.
#12
If you want to spray a 75 shot, then you put the correct sized jet in for your given bottle pressure. Fuel pressure does not matter when you are choosing a nitrous jet for 75 HP.
Now the fuel side of things are a completely different story. You always want to make sure your stock fuel system is operating properly with 36psi at idle and 43psi at WOT. The fuel jets shown in the calculator are BALLPARK estimates for your car. The ONLY way to be sure is to have a wideband. For my car, depending on which intake setup and ECU program I'm using that day, my fuel jet sizing can vary between 22 to 32 for a 75 shot.
If you don't have a wideband and fuel pressure gauge already, I would not spray above a 50 shot without having those things. The wideband is the most important though.
#13
Aaron I have to disagree with your statement that "The fuel pressure and fuel jets only change the amount of fuel that go into your motor. It has nothing to do with how much HP you'll make" (besides tuning for AFR) Quoted in post #12.
With Nitrous you need fuel to make to Horsepower if there is not enough fuel to nitrous you will make less horsepower.
With Nitrous you need fuel to make to Horsepower if there is not enough fuel to nitrous you will make less horsepower.
#14
What I do is first determine what size nitrous jet I'd like to use (75, 100, 125 shot etc). Then I use a fuel jet according to what the nitrous calculator recommends. Then I may have to change the fuel jet and/or my fuel pressure once I get some AFR readings on my wideband.
#15
I'm dynoing on sat. I'm planning on running my 75 and 100shot on the dyno.
I'm changing the Nitrous jet one size larger on each see if brings me closer to the WHP I should be making with safe AFR's. Any sugestions I,m all ears? Thanks for your input Guys!
I'm changing the Nitrous jet one size larger on each see if brings me closer to the WHP I should be making with safe AFR's. Any sugestions I,m all ears? Thanks for your input Guys!
#16
I dyno'd using the suggested 100shot jets from zex at 1000 bottle psi and made 90whp with my a/f at 12.4-12.8. in my opinion the suggested 900-950 bottle psi from zex is too low. I know it's only 50-100psi but it makes a differance. I am going to retune for a 125shot soon but will run 1 nitrous jet size higher than suggested and bring 3 fuel jets, the suggested jet and the next two higher cause for this size shot I want my a/f alittle lower around 12.0
btw this is not on 93octance so if you are planning to tune for pump gas I would go for a richer jetting
btw this is not on 93octance so if you are planning to tune for pump gas I would go for a richer jetting
Last edited by t6378tp; 02-08-2008 at 12:36 AM.
#17
I'm using the Dynotune kit with the normal 150hp solenoids.
I dyno'd using the suggested 100shot jets from zex at 1000 bottle psi and made 90whp with my a/f at 12.4-12.8. in my opinion the suggested 900-950 bottle psi from zex is too low. I know it's only 50-100psi but it makes a differance. I am going to retune for a 125shot soon but will run 1 nitrous jet size higher than suggested and bring 3 fuel jets, the suggested jet and the next two higher cause for this size shot I want my a/f alittle lower around 12.0
btw this is not on 93octance so if you are planning to tune for pump gas I would go for a richer jetting
btw this is not on 93octance so if you are planning to tune for pump gas I would go for a richer jetting
#19
I would just go with the jet most calculators say. It will more than likely be larger than the jet Zex says to use. And I also think 950psi is a tad too low in order to get the right amount of HP out of a particular jet size. But once you start getting above 1100psi, you run the chance of the nitrous solenoid not opening at all! I've had my nitrous solenoid fail to open when I tried spraying at 1150psi before. I shoot for 1050psi and it always works.
I'm using the Dynotune kit with the normal 150hp solenoids.
I was about to ask if you were spraying a 100 shot with 93 octane with those AFRs. What fuel do you use?
I'm using the Dynotune kit with the normal 150hp solenoids.
I was about to ask if you were spraying a 100 shot with 93 octane with those AFRs. What fuel do you use?
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