jetting with direct port

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Nov 11, 2006 | 07:26 AM

ApacheDrill

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From: Fort Knox

jetting with direct port

Okay my intake is finished and the few other things that i have done to go direct port.. i have a few questions now..

How to i know the correct jetting without getting 10 sets of jets x 8 for nitrous and x 8 for fuel?

Is there a Mr T starter jetting kit that you can pick up without being raped by the set?

I am running a independent fuel system up front for the fuel, how does this change the fuel jetting?

My plan is to start at 200 shot and work my way up as the car takes to it..

Before it was to easy, 1 fuel and 1 nitrous off the main fuel line.. Now im getting a little nervous and not alot of room for error.. HELP!!!!!!!!!!!!!!

Nov 11, 2006 | 07:15 PM

LS1Queen

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From: Vidalia, Ga.

Quote:

Originally Posted by ApacheDrill

A direct port sure hits the pocket alittle harder in the jet department LOL We run a direct port with a stand alone low pressure system we box the jets and run from 4-7 psi flowing pressure we havent ran anything smaller that a 250 shot with the direct so i'm not sure what jet size a 200 is but a 250 is N28 F28 a 300 is 32/32 i would say a 200 is around 24/24

Nov 11, 2006 | 07:23 PM

Todd157k

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From: Usa

98 A3 Z28 6.0 IRON BLOCK
Bradco TH350, GTP Stage 2 Heads, TR 244, FAST 90/90, QTP 1 7/8, Duals, NOS Direct Port, FIPK,Wolfe Cage, Strange 12 Bolt, BMR suspension, Qa1's, ET Convo's with MT Drag Radials....
"while your post count gets higher. my ET gets lower"

You've got $10,000 in motor.. You're going to need $200 in a jet kit. Different days, diff tracks, etc.

Bad azz set up dude.

Nov 11, 2006 | 08:51 PM

tuff

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From: lombard,IL

A 26 nos and 24 fuel will put you at a 200 shot with 9 PSI of pressure.This will be a safe tune so you will just have to tune from there.

Nov 12, 2006 | 08:02 AM

ShiznityZ28

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From: GB MD

http://www.robietherobot.com/NitrousJetCalculator.htm is a good tool. it will get you safe.

Nov 12, 2006 | 04:14 PM

hugger1975

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From: Naperville

Quote:

Originally Posted by tuff

A 26 nos and 24 fuel will put you at a 200 shot with 9 PSI of pressure.This will be a safe tune so you will just have to tune from there.

yup,
I have for my 175 shot:
nos 24
fuel 24

I ordered 26 for the NOS side for a 200 shot.
should be just right casue the 24/24 runs rich

Nov 20, 2006 | 11:02 AM

Black Sunshine/ 00SS

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From: Michigan

You can start with the jets "square" meaning the same, as in N24 F24, and then since you have a stand alone fuel system, you can asjust the fuel preasure, in small increments, to get the A/F ratio the way you want it. You'll have to read the plugs, or get some way of reading the A/F ratio.

Unflortunately, there is no getting around having to buy all the jets.