timing ratard for nitrous (IAT)
timing ratard for nitrous (IAT) so i am in the process of installing a NX dual nozzle wet kit with HSW microedge and i was reading about doing something with the IAT tables to make it so i can run NA timing when not spraying and less timing when spraying...can anyone elaborate for me or tell me what i need to do. I dont want to have to load a file everytime i want to switch from NA to spray...i am using HPtuners, thanks!
btw i tried to edit my title to RETARD, but i cant, sorry haha.
btw i tried to edit my title to RETARD, but i cant, sorry haha.
Last edited by FiFdYnUtz; Dec 3, 2009 at 10:07 PM.
so i am in the process of installing a NX dual nozzle wet kit with HSW microedge and i was reading about doing something with the IAT tables to make it so i can run NA timing when not spraying and less timing when spraying...can anyone elaborate for me or tell me what i need to do. I dont want to have to load a file everytime i want to switch from NA to spray...i am using HPtuners, thanks!
I have been thinking about this same issue, and this is what I am planning to do.
I will use the ground method of the IAT sensor, but with a twist.
I plan on using different resistors wired to a switch that will activate when the N2o/fuel solenoid activates.
I can find the value of the needed resistor by hooking my scanner up and use trial and error until I find the values I need.
I will really only need one resistor, maybe two if I go with a 2 stage.
I will use a rotary type switch:
Say position 1 = off/ no timing pulled
2 = resistor 1 / -4 deg. for 100 shot
3 = resistor 2 / -6 deg for 150 shot
4 = full ground / -12 deg for 250 shot
What I would need to find out is what value resistor I would need to hit a certain area on the IAT vs Kpa Map.
Say resistor #1 would hit 70 C, then I would change the values in the 70c to pull 4 deg of timing.
So on and so forth.
Hopefully I did not confuse anyone, but this is what I'm going to try..
I will use the ground method of the IAT sensor, but with a twist.
I plan on using different resistors wired to a switch that will activate when the N2o/fuel solenoid activates.
I can find the value of the needed resistor by hooking my scanner up and use trial and error until I find the values I need.
I will really only need one resistor, maybe two if I go with a 2 stage.
I will use a rotary type switch:
Say position 1 = off/ no timing pulled
2 = resistor 1 / -4 deg. for 100 shot
3 = resistor 2 / -6 deg for 150 shot
4 = full ground / -12 deg for 250 shot
What I would need to find out is what value resistor I would need to hit a certain area on the IAT vs Kpa Map.
Say resistor #1 would hit 70 C, then I would change the values in the 70c to pull 4 deg of timing.
So on and so forth.
Hopefully I did not confuse anyone, but this is what I'm going to try..
Last edited by rickou812; Dec 3, 2009 at 10:56 PM.
Trending Topics
10 Second Club
Joined: Jul 2008
Posts: 224
Likes: 0
From: Columbus Ohio
I have been thinking about this same issue, and this is what I am planning to do.
I will use the ground method of the IAT sensor, but with a twist.
I plan on using different resistors wired to a switch that will activate when the N2o/fuel solenoid activates.
I can find the value of the needed resistor by hooking my scanner up and use trial and error until I find the values I need.
I will really only need one resistor, maybe two if I go with a 2 stage.
I will use a rotary type switch:
Say position 1 = off/ no timing pulled
2 = resistor 1 / -4 deg. for 100 shot
3 = resistor 2 / -6 deg for 150 shot
4 = full ground / -12 deg for 250 shot
What I would need to find out is what value resistor I would need to hit a certain area on the IAT vs Kpa Map.
Say resistor #1 would hit 70 C, then I would change the values in the 70c to pull 4 deg of timing.
So on and so forth.
Hopefully I did not confuse anyone, but this is what I'm going to try..
I will use the ground method of the IAT sensor, but with a twist.
I plan on using different resistors wired to a switch that will activate when the N2o/fuel solenoid activates.
I can find the value of the needed resistor by hooking my scanner up and use trial and error until I find the values I need.
I will really only need one resistor, maybe two if I go with a 2 stage.
I will use a rotary type switch:
Say position 1 = off/ no timing pulled
2 = resistor 1 / -4 deg. for 100 shot
3 = resistor 2 / -6 deg for 150 shot
4 = full ground / -12 deg for 250 shot
What I would need to find out is what value resistor I would need to hit a certain area on the IAT vs Kpa Map.
Say resistor #1 would hit 70 C, then I would change the values in the 70c to pull 4 deg of timing.
So on and so forth.
Hopefully I did not confuse anyone, but this is what I'm going to try..
What I was doing before I set-up a COS was just unplugging the IAT sensor when I wanted to spray. This pegs the IAT to it's coldest setting in the computer and then I just modified the bottom couple lines of the table with the timing retard I wanted. You could set-up something a little nicer, but this works fine for starters.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo 10 Second Club
Joined: Jul 2008
Posts: 224
Likes: 0
From: Columbus Ohio
http://www.casperselectronics.com/st...roducts_id=701
^ for that kind of money i would likely just get the "timing tuner" that hooks up to the crank sensor and retards timing when nitrous is activated..
where you happy with the iat trick? did it work properly/well? i may go this route for financial sake for now...
where you happy with the iat trick? did it work properly/well? i may go this route for financial sake for now...
is this the table i should be looking at? and would i add my correction at the TOP because thats coldest? sorry for all the questions, these tables are new to me...thanks for the help so far!
10 Second Club
Joined: Jul 2008
Posts: 224
Likes: 0
From: Columbus Ohio
Considering I already have the tuning software, the IAT was free by just unplugging it. Then I'd just switch the tune if I'd put in different jets. Those timing tuners are nice, but from what I understand there is no way of knowing if they're actually working. If you datalog, it will still be commanding full timing and you won't actually see the timing pulled, it's just a different type of trick. Depends on how you want it to work, if you don't do your own tuning then paying someone to set-up a multiple retard switch like the one I previously posted is what I'd do. Just my 2 cents.
The IAT rewire is easy and works well. You should use relays to alter the sensor path. Here is the resistance data for the IAT sensor. Then you just alter the desired row in the IAT-Timing table. Just be sure to wire it such that the sensor itself is totally out of the circuit when you want to pull timing, otherwise your resistance will vary with temp both ways.
9420 ohms = 32 *F - 0 *C
7280 ohms = 41 *F - 5 *C
5670 ohms = 50 *F - 10 *C
4450 ohms = 59 *F - 15 *C
3520 ohms = 68 *F - 20 *C
2796 ohms = 77 *F - 25 *C
2238 ohms = 86 *F - 30 *C
1802 ohms = 95 *F - 35 *C
1459 ohms = 104 *F - 40 *C
1188 ohms = 113 *F - 45 *C
973 ohms = 122 *F - 50 *C
667 ohms = 140 *F - 60 *C
467 ohms = 158 *F - 70 *C
332 ohms = 176 *F - 80 *C
241 ohms = 194 *F - 90 *C
177 ohms = 212 *F - 100 *C
132 ohms = 230 *F - 110 *C
100 ohms = 248 *F - 120 *C
77 ohms = 266 *F - 130 *C
60 ohms = 284 *F - 140 *C
47 ohms = 302 *F - 150 *
9420 ohms = 32 *F - 0 *C
7280 ohms = 41 *F - 5 *C
5670 ohms = 50 *F - 10 *C
4450 ohms = 59 *F - 15 *C
3520 ohms = 68 *F - 20 *C
2796 ohms = 77 *F - 25 *C
2238 ohms = 86 *F - 30 *C
1802 ohms = 95 *F - 35 *C
1459 ohms = 104 *F - 40 *C
1188 ohms = 113 *F - 45 *C
973 ohms = 122 *F - 50 *C
667 ohms = 140 *F - 60 *C
467 ohms = 158 *F - 70 *C
332 ohms = 176 *F - 80 *C
241 ohms = 194 *F - 90 *C
177 ohms = 212 *F - 100 *C
132 ohms = 230 *F - 110 *C
100 ohms = 248 *F - 120 *C
77 ohms = 266 *F - 130 *C
60 ohms = 284 *F - 140 *C
47 ohms = 302 *F - 150 *
The IAT rewire is easy and works well. You should use relays to alter the sensor path. Here is the resistance data for the IAT sensor. Then you just alter the desired row in the IAT-Timing table. Just be sure to wire it such that the sensor itself is totally out of the circuit when you want to pull timing, otherwise your resistance will vary with temp both ways.
9420 ohms = 32 *F - 0 *C
7280 ohms = 41 *F - 5 *C
5670 ohms = 50 *F - 10 *C
4450 ohms = 59 *F - 15 *C
3520 ohms = 68 *F - 20 *C
2796 ohms = 77 *F - 25 *C
2238 ohms = 86 *F - 30 *C
1802 ohms = 95 *F - 35 *C
1459 ohms = 104 *F - 40 *C
1188 ohms = 113 *F - 45 *C
973 ohms = 122 *F - 50 *C
667 ohms = 140 *F - 60 *C
467 ohms = 158 *F - 70 *C
332 ohms = 176 *F - 80 *C
241 ohms = 194 *F - 90 *C
177 ohms = 212 *F - 100 *C
132 ohms = 230 *F - 110 *C
100 ohms = 248 *F - 120 *C
77 ohms = 266 *F - 130 *C
60 ohms = 284 *F - 140 *C
47 ohms = 302 *F - 150 *
9420 ohms = 32 *F - 0 *C
7280 ohms = 41 *F - 5 *C
5670 ohms = 50 *F - 10 *C
4450 ohms = 59 *F - 15 *C
3520 ohms = 68 *F - 20 *C
2796 ohms = 77 *F - 25 *C
2238 ohms = 86 *F - 30 *C
1802 ohms = 95 *F - 35 *C
1459 ohms = 104 *F - 40 *C
1188 ohms = 113 *F - 45 *C
973 ohms = 122 *F - 50 *C
667 ohms = 140 *F - 60 *C
467 ohms = 158 *F - 70 *C
332 ohms = 176 *F - 80 *C
241 ohms = 194 *F - 90 *C
177 ohms = 212 *F - 100 *C
132 ohms = 230 *F - 110 *C
100 ohms = 248 *F - 120 *C
77 ohms = 266 *F - 130 *C
60 ohms = 284 *F - 140 *C
47 ohms = 302 *F - 150 *
Thanks,
Rick
10 Second Club
Joined: Nov 2009
Posts: 66
Likes: 0
From: franklin tn
i spray 150on pump gas with zero knock. hold up.....i aint talkin audible, i had laptop hooked up,i know its an iroc but i aint that redneck. the l98 tpi loved full timing too and i sprayed it 200 for years without trouble. i know its against the "prefered methods" but so is adultry.