Using A Window Switch And Hpt For Wet\dry\ Or Direct Tuneing
Using A Window Switch And Hpt For Wet\dry\ Or Direct Tuneing After Houers Of Disappointment In Aftermarket Products With Overly Complex Electronics That Only Provided Inconsistent Results I Decided To Re-invent The N20 Wheel
Some Of You Are Gonna Say This Has Been Done Before And I Hope So But Nevertheless:
A Simple, Cheep, Reliable Way To N20 Tune Any Setup
Simply Put:
1: Wire Your Iat Sensor Up To Your Ground Output On Your Window Switch( Which Is Hooked To The Noid Relay)
2: In Hp Tuners Disable The Iat Voltage Dtc's
3: Use The Lowest & Highest Region Of Your Iat Spark Correction Table To Pull Timeing
4: Use The Iat Ve Pe Add To Add Fueling To Your Wot Pe Ratio
Now When Your Kit Activates Your Iat Will Read -38 Deg (a Iat Which Most Will Never Use)
This Will Cause Your Pe Multpulier To Change And Your Spark To Be Pulled
No Resistors, No Extra Relays, No Crappy Interfaces, No Twisters.. Nothing To Burn Out
All You Need Is A Wire And Tuneing Software
-enjoy~!
Some Of You Are Gonna Say This Has Been Done Before And I Hope So But Nevertheless:
A Simple, Cheep, Reliable Way To N20 Tune Any Setup
Simply Put:
1: Wire Your Iat Sensor Up To Your Ground Output On Your Window Switch( Which Is Hooked To The Noid Relay)
2: In Hp Tuners Disable The Iat Voltage Dtc's
3: Use The Lowest & Highest Region Of Your Iat Spark Correction Table To Pull Timeing
4: Use The Iat Ve Pe Add To Add Fueling To Your Wot Pe Ratio
Now When Your Kit Activates Your Iat Will Read -38 Deg (a Iat Which Most Will Never Use)
This Will Cause Your Pe Multpulier To Change And Your Spark To Be Pulled
No Resistors, No Extra Relays, No Crappy Interfaces, No Twisters.. Nothing To Burn Out
All You Need Is A Wire And Tuneing Software
-enjoy~!
TECH Regular
Joined: Aug 2004
Posts: 443
Likes: 0
From: Tyler, TX.
Sounds kickass but i got quite a few questions.
1. Will this still work if using a digital MSD window switch that is wired up to turn on when the key is turned on?
2. You would use the yellow wire from the window switch right?
3. Why do you mess with the high end of the IAT tables and just not the -40?
1. Will this still work if using a digital MSD window switch that is wired up to turn on when the key is turned on?
2. You would use the yellow wire from the window switch right?
3. Why do you mess with the high end of the IAT tables and just not the -40?
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Be in the application
Hit ALT and Prt Sc on the keyboard (same time), that copys the image in the active window (in your case the HPT). Then Paste it into your favorite graphics program.
Hit ALT and Prt Sc on the keyboard (same time), that copys the image in the active window (in your case the HPT). Then Paste it into your favorite graphics program.
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You need to do a bin file for even us with HPT to see it. you can't copy it to another program as you can see when you try and open it, it's the wrong code. post the bin, and I can do a screen capture and much more.
I can tell you, #4 has been tried numerous times, most won't use it because of slow response time, meaning it doesn't always come on immediately and that can be bad down low with the initial TQ spike. been there done that. You prob can find threads on this from a few years ago and get some insight. it has never caught on, and there are reasons. Now if you can get over the slow response time, you may have something. Your saying it's safe to just ground the IAT and it will go to 38°? If so, have you or someone alse actually done this, or is it speculation at this time?
By the way, I have been tuning the dry hit in HPT for years and never have had to use any out side device, nothing, not even cutting and rewiring your IAT sensor. So it's already possible for the tuning knowledgable, which your becoming over time.
Robert
I can tell you, #4 has been tried numerous times, most won't use it because of slow response time, meaning it doesn't always come on immediately and that can be bad down low with the initial TQ spike. been there done that. You prob can find threads on this from a few years ago and get some insight. it has never caught on, and there are reasons. Now if you can get over the slow response time, you may have something. Your saying it's safe to just ground the IAT and it will go to 38°? If so, have you or someone alse actually done this, or is it speculation at this time?
By the way, I have been tuning the dry hit in HPT for years and never have had to use any out side device, nothing, not even cutting and rewiring your IAT sensor. So it's already possible for the tuning knowledgable, which your becoming over time.
Robert
Last edited by Robert56; May 19, 2008 at 12:49 AM.
I Dont Like The Idea Of Progressive Load Tunes As There Is A Chance Of The Nozzle Moving..
This Way You Can Spray Post Maf, And Just Use Your Pe Modifer To Compensate...
I Had Some Small Issues With Fueing Reacting Slow But It Was Still Faster Then The Maf And All I Did Was Up The Enrichment Rate From 2 Till 4 .. Im Sure This Will Handle The Issue
(if Not I Can Just Start The Iat Ve Pe Add Table A Little Eariler And Roll Into The Pe Adjustment(again Worst Case Scinario))
This Way You Can Spray Post Maf, And Just Use Your Pe Modifer To Compensate...
I Had Some Small Issues With Fueing Reacting Slow But It Was Still Faster Then The Maf And All I Did Was Up The Enrichment Rate From 2 Till 4 .. Im Sure This Will Handle The Issue
(if Not I Can Just Start The Iat Ve Pe Add Table A Little Eariler And Roll Into The Pe Adjustment(again Worst Case Scinario))
BTW I WANT TO STRESS AGAIN I HAVE TESTED THIS... IT DOES WORK... AND IT IS THE EXACT SAME METHOD HARRIS SPEED WORKS IS USING ON THEIR INTERFACE
THE ONLY DIFFERENCE IS HSW USES A RESISTOR SO THAT THE TEMP ONLY READS 158 BECAUSE IF YOU JUST FULLY GROUND THE IAT YOU WILL THROW A CODE... (WHICH IS SIMPLE ENOUGH TO AVOID IF YOU HAVE TUNEING SOFTWARE)
PAST THAT HSW USES AN ARRANGEMENT OF RESISTORS TO SKEW THE MAF OUTPUT VALUES MUCH IN THE SAME WAY SLP TOOK A TRUCK MAF AND "CALIBRATED" IT TO ADD FUEL
THIS IS NOT NECESSIARY IF YOU HAVE TUNEING SOFTWARE BECAUSE THERE IS A PE MODIFER TABLE FOR IAT'S
THE ONLY DIFFERENCE IS HSW USES A RESISTOR SO THAT THE TEMP ONLY READS 158 BECAUSE IF YOU JUST FULLY GROUND THE IAT YOU WILL THROW A CODE... (WHICH IS SIMPLE ENOUGH TO AVOID IF YOU HAVE TUNEING SOFTWARE)
PAST THAT HSW USES AN ARRANGEMENT OF RESISTORS TO SKEW THE MAF OUTPUT VALUES MUCH IN THE SAME WAY SLP TOOK A TRUCK MAF AND "CALIBRATED" IT TO ADD FUEL
THIS IS NOT NECESSIARY IF YOU HAVE TUNEING SOFTWARE BECAUSE THERE IS A PE MODIFER TABLE FOR IAT'S
Sounds kickass but i got quite a few questions.
1. Will this still work if using a digital MSD window switch that is wired up to turn on when the key is turned on?
2. You would use the yellow wire from the window switch right?
3. Why do you mess with the high end of the IAT tables and just not the -40?
1. Will this still work if using a digital MSD window switch that is wired up to turn on when the key is turned on?
2. You would use the yellow wire from the window switch right?
3. Why do you mess with the high end of the IAT tables and just not the -40?
THEN JUST TELL THE PCM TO START THE TIMEING PULL SLIGHT BEFORE YOUR N20 HIT BEGINS
(THIS WAY YOU CAN DRIVE ARROUND ARMED WITHOUT AFFECTING YOUR N\A TUNE) YOU COULD ALSO ADD AN EXTRA RELAY BUT THEN YOU ARE ADDING COMPLEXITY TO THE THE DESGIN (AND RELYING ON A RELAY
)2: YUP, USE THE YELLOW WIRE (STAGE 1) OR YOU COULD GET MORE COMPLEX WITH RESISTORS FOR DIFFERENT IAT'S AND SET THE TUNE TO PULL DIFFERENT AMMOUNTS FOR 2 DIFFERNT STAGES (TOO COMPLEX IMO)
3:SAFETY.. ITS NOT NECESSIARY BUT IF YOU LOOK HOW I HAVE MINE SETUP I BASICALLY PULLED TIMEING AND ADDED FUEL FOR ANY TEMP RANGE THAT IM GARUNTEED TO NEVER HIT... YOUR NEVER GONNA USE THE 250 IAT CELL ANAWAY SO YOU MIGHT AS WELL SET IT FOR SOMETHING USEFUL
ALSO THIS ENSURES THAT ANY SLIGHT VARIATIONS IN TEMP DUE TO GROUNDING CONDITIONS WILL BE COVERED AS NOW YOUR BASICALLY SAYING ANY TEMP OVER 250 OR UNDER 0 PULLS TIMEING
3:safety.. Its Not Necessiary But If You Look How I Have Mine Setup I Basically Pulled Timeing And Added Fuel For Any Temp Range That Im Garunteed To Never Hit... Your Never Gonna Use The 250 Iat Cell Anaway So You Might As Well Set It For Something Useful
Also This Ensures That Any Slight Variations In Temp Due To Grounding Conditions Will Be Covered As Now Your Basically Saying Any Temp Over 250 Or Under 0 Pulls Timeing
Also This Ensures That Any Slight Variations In Temp Due To Grounding Conditions Will Be Covered As Now Your Basically Saying Any Temp Over 250 Or Under 0 Pulls Timeing
BTW I WANT TO STRESS AGAIN I HAVE TESTED THIS... IT DOES WORK... AND IT IS THE EXACT SAME METHOD HARRIS SPEED WORKS IS USING ON THEIR INTERFACE
THE ONLY DIFFERENCE IS HSW USES A RESISTOR SO THAT THE TEMP ONLY READS 158 BECAUSE IF YOU JUST FULLY GROUND THE IAT YOU WILL THROW A CODE... (WHICH IS SIMPLE ENOUGH TO AVOID IF YOU HAVE TUNEING SOFTWARE)
PAST THAT HSW USES AN ARRANGEMENT OF RESISTORS TO SKEW THE MAF OUTPUT VALUES MUCH IN THE SAME WAY SLP TOOK A TRUCK MAF AND "CALIBRATED" IT TO ADD FUEL
THIS IS NOT NECESSIARY IF YOU HAVE TUNEING SOFTWARE BECAUSE THERE IS A PE MODIFER TABLE FOR IAT'S
THE ONLY DIFFERENCE IS HSW USES A RESISTOR SO THAT THE TEMP ONLY READS 158 BECAUSE IF YOU JUST FULLY GROUND THE IAT YOU WILL THROW A CODE... (WHICH IS SIMPLE ENOUGH TO AVOID IF YOU HAVE TUNEING SOFTWARE)
PAST THAT HSW USES AN ARRANGEMENT OF RESISTORS TO SKEW THE MAF OUTPUT VALUES MUCH IN THE SAME WAY SLP TOOK A TRUCK MAF AND "CALIBRATED" IT TO ADD FUEL
THIS IS NOT NECESSIARY IF YOU HAVE TUNEING SOFTWARE BECAUSE THERE IS A PE MODIFER TABLE FOR IAT'S
Robert
O God... Here We Go Again
I Can Prove Any Point I Have Said Above With Ample Evidence...
The Reason You Dont Want To Debate Is You Know Your Wrong So You T Are Just Tring To Discredit My Idea
Also I Have A Log That Shows This Working... And I Am Currently Using This Setup So How Can You Say It Dosent Work?
In Any Case.. I've Done My Homework So Please Hit Me With Any Question You Can Dream Of...
Btw:i Have Absolutely No Reason To Lie Or Be Biased Im Not Being Sponcered Or Endorsed By Anyone Hell Im Tring To Promote A Free Mod What More Could You Ask For
I Can Prove Any Point I Have Said Above With Ample Evidence...
The Reason You Dont Want To Debate Is You Know Your Wrong So You T Are Just Tring To Discredit My Idea
Also I Have A Log That Shows This Working... And I Am Currently Using This Setup So How Can You Say It Dosent Work?
In Any Case.. I've Done My Homework So Please Hit Me With Any Question You Can Dream Of...
Btw:i Have Absolutely No Reason To Lie Or Be Biased Im Not Being Sponcered Or Endorsed By Anyone Hell Im Tring To Promote A Free Mod What More Could You Ask For
I've Answered Your Question But Just To Make It Clear
Yes I Have Successfully Tried This, It Works Fine And I've Logged It
I Did Have Some Small Delay (in Fueling) But If You Have The Sensor Gorund Out Upon System ARMING (NOT NOID FIREING) The Computer Has Ample Time To React And You Should Have No Problem Pulling Timeing And Adding Fuel For Your N20 Segment Of Your Powerband
The Hsw Interface Uses This Same Idea To Ground Out The Iat Sensor ... If Im So Wrong Then Why Dont You Explain ....
Also You Conterdict Your Self So Much Because In Past Posts You Have Even Said "the Interface Is A More Advanced Resistor Mod" (i Believe This Quote Is On Your Website)
In Any Case There Is Only One Way To Effect The Computer's Reading Of Iat Values And That Is To Apply Ground To The 5v Signal Flowing Through The Iat Sensor...
Do You Dare To Conterdict This Fact???
Yes I Have Successfully Tried This, It Works Fine And I've Logged It
I Did Have Some Small Delay (in Fueling) But If You Have The Sensor Gorund Out Upon System ARMING (NOT NOID FIREING) The Computer Has Ample Time To React And You Should Have No Problem Pulling Timeing And Adding Fuel For Your N20 Segment Of Your Powerband
The Hsw Interface Uses This Same Idea To Ground Out The Iat Sensor ... If Im So Wrong Then Why Dont You Explain ....
Also You Conterdict Your Self So Much Because In Past Posts You Have Even Said "the Interface Is A More Advanced Resistor Mod" (i Believe This Quote Is On Your Website)
In Any Case There Is Only One Way To Effect The Computer's Reading Of Iat Values And That Is To Apply Ground To The 5v Signal Flowing Through The Iat Sensor...
Do You Dare To Conterdict This Fact???
Last edited by Jpr5690; May 20, 2008 at 09:09 PM.
Finally, Is It Safe?
Yes It Is.. This Is The Same Principals I Used To Re-wire The Faulty Ect Gauge In A F-body To Read Properly (this Has Been Running Good For The Last 3 Years)
Also This Is The Exact Same Way All Sensors Function.. The Only Thing Your Doing Here Is Closing The Gap Between The 2 Wires
Also If You Want To Argue Why Dont We Bring To The Table That Slp Sells A Iat Timeing Tricker Which Also Peforms The Same Function As This Mod
The Only Difference Between The 2 Desgins Here Is That I Am Putting This On A Switch While The Slp Product Just Grounds Out The Iat Sensor Full Time
You Wont Win This Discussion, (i've Done My Homework)
ALSO I WOULD LIKE TO THANK FROST AS IT WAS HE WHO CLUED ME IN N TO THE IAT PE MODIFER TABLE AS PER OUR LAST DISCUSSION...
Yes It Is.. This Is The Same Principals I Used To Re-wire The Faulty Ect Gauge In A F-body To Read Properly (this Has Been Running Good For The Last 3 Years)
Also This Is The Exact Same Way All Sensors Function.. The Only Thing Your Doing Here Is Closing The Gap Between The 2 Wires
Also If You Want To Argue Why Dont We Bring To The Table That Slp Sells A Iat Timeing Tricker Which Also Peforms The Same Function As This Mod
The Only Difference Between The 2 Desgins Here Is That I Am Putting This On A Switch While The Slp Product Just Grounds Out The Iat Sensor Full Time
You Wont Win This Discussion, (i've Done My Homework)
ALSO I WOULD LIKE TO THANK FROST AS IT WAS HE WHO CLUED ME IN N TO THE IAT PE MODIFER TABLE AS PER OUR LAST DISCUSSION...
Last edited by Jpr5690; May 21, 2008 at 10:28 AM.
I'm seriously considering a nitrous kit for my car, and use HPTuners also.
You can email it if you want.
rel3rd@comcast.net
Thanks.