cyhm

I've been searching for the appropriate jet sizes to use for a 50 shot and 75 shot with my b18b1, but holley doesn't seem to have a chart for the sniper kit nor do their other charts make any sense to me compared to other companies'. I was wondering if anyone could tell me which jet sizes to use with this particular kit. I'm not sure if jet sizes are universal among kits, but it seems that their recommendations are different from what I've read. I am running stock base fuel pressure (stock fpr) with a walbro 255.

grumblemarc

iTrader: (4)

So are you saying this is something a call or email to Holley cannot answer?

cyhm

So are you saying this is something I cannot ask HT before receiving an email that will most likely never come?

grumblemarc

iTrader: (4)

Don't put words into my mouth. Just wondering why no calls/contact made with the manufacturer. Especially after you claim you found absolutely nothing. Absolutely nothing found to me would indicate that I would need to get the information from the source since no one else seems to have it. But in reading your post you have the info but do not understand it. Possibly your question might have been to have someone interpret that chart for you?

grumblemarc

iTrader: (4)

If it's not that simple please educate me. I found this on B20VTEC and it seems pretty simple to me. Unless there's something special/proprietary about this kit?
http://www.b20vtec.com/forums/turbo-...0-75-shot.html

grumblemarc

iTrader: (4)

I found this calculator with charts.
http://www.robietherobot.com/nitrousjetcalculator.htm
Looks simple enough to me.

grumblemarc

iTrader: (4)

I found this PDF. Seems simple enough to me.
https://www.holley.com/data/TechServ...ech%20Info.pdf
Anything I'm just not getting?

cyhm

Sorry if I was not clear enough. That was a sarcastic response to your sarcastic question that was meant to imply that I have in fact submitted a tech help form to Holley with no response. They have a jet chart, but it gives no information as to the amount of power one should expect. It is simply a use x fuel jet at x psi with x n2o jet. I also stated that I was unsure whether or not jet sizes were universal among different kits. Thanks for your helpful responses.

DDTECH

Its going to highly depending on Which Jets you're using, Fuel pressure and what your bottle pressure is.

Whats your jet markings and fuel pressure / bottle pressure.

wantboost

iTrader: (2)

the sniper kit should follow the same jetting chart as any single nozzle wet kit, it's not rocket science.

but like DDTECH said it depends mainly on fuel pressure and bottle pressure, like if you don't have a bottle heater then when the bottle loses pressure you'll obviously have a change in nitrous flow through the jet.

the sniper kit is nothing more than a barebones super powershot kit

oh and for the record, I googled "nos sniper kit" clicked the first jegs link and it has a pdf of the instructions WITH a jet chart for the 4cyl kit. gee that was hard

http://www.jegs.com/InstallationInst.../741-07005.pdf

you're welcome

cyhm

Thank you for that jegs link. The installation pdf from Holley didn't give that example chart at 43psi. I assume it's the same for a 4cyl as a 6 since it's just a single fogger kit anyway? That atleast gives a better idea than the second chart in that installation procedure, which is the one I was talking about.

I do have a bottle heater, which I failed to mention earlier. I assume I will be able to maintain close to 950psi bottle pressure and fuel pressure should be stock or close to it (~40psi on b18b?) if the walbro doesn't overrun our stock fprs like they do on dsms. Thanks for the help. The fact that jets are universal among kits solves the problem for me. I wasn't sure if different solenoids/fogger designs had an impact on jetting. Once again, thanks.

wantboost

iTrader: (2)

Yea since it is a single fogger that chart should get you close.

each motor will make different power with different jets. given the difference in displacement, rpm, volumetric efficiency, cam design, etc.

so you might have to play around with different jets and fuel pressure.

DDTECH

Aim to keep your bottle pressure more constant, 850-950 is a good target, its hard to keep bottles at a 1000+ for consistence.