slammin86

iTrader: (4)

Does anyone know what the correlation is here?

At the track with a 150 shot (using a 62N and a 33F) I am running mid to high 10 AFR up top. I want to get some jets coming to try to lean this out a bit and wonder what I need to order. Is it worth trying a 32 jet or should I get a 31? I just hate to buy a bunch of extra jets that I might never use if I do not have to.

nocooler

iTrader: (5)

Tune the fuel with the plugs not the wb02.

WE TODD DID

iTrader: (2)

Not much since you have a high pressure fuel system. On a low pressure system like 4-6lbs, it would change a lot. You'll need to make a big jump to see a change, like .005".

NitrousExpress

iTrader: (4)

This is true, changing .001 one way or the other at EFI pressure won't make hardly any difference... but keep in mind every application is different, it also depends on how much power the motor makes by itself, how much you are spraying, etc..short and sweet answer is, the difference will be minimal going 1 size up or down..

-Garrett

N2Ojunky

OK I would like to know the answer to this as well.
I have a shark nozzle kit and have done the upgrade so it will spray a bigger shot and this is what I was told
"shark nozzel upgrade"
Uses the same psi you currently run "stock".
The jettings are as follows.
N20/Fuel
150HP 62 34
175HP 73 39
200HP 78 40
225HP 82 42
250HP 88 46
See between the 175/200 only 1jet size difference "fuel" & only 2 different between 200/225. So what has been said in this thread is that I can run a 78/38 for a 200hp shot or a 78/41 and it will be about the same. Is this true?

NitrousExpress

iTrader: (4)

Yes you can, going one way or the other a jet size or two will either lean or richen the car on nitrous.

-Garrett

BSmiff

One will be slightly fatter than the other and the lower the pressure of your fuel system, the fatter the 41 will be. You could just drop a little more timing and add more nitrous jet to clean it up or drop the fuel down to clean up the 78.

BSmiff

Treed the **** outta my ***