FC3S Murray's never ending build.

***TitaniumTT*** · 08-20-2009, 08:28 PM

I understand what you're saying. Basically need to reference out the difference between mani pressure and atmosphere right?

So then, how would one go about getting the "standard" "hg from a kpa reading? I know there is a descrepancy between my Motec and autometer gauge. But when the Motec reads 50 kpa, the AM says ~14-15"hg. 10 kpa = ~25"hg. So, how does one go about converting the kpa reading to the standard "hg?

FC3S Murray · 08-21-2009, 07:44 AM

Check this link out brian: http://www.sensorsone.co.uk/pressure...onversion.html
* use the right hand side bar

Does anyone know off the top of there head if you decide to use negative lag on your primary injectors for the PFC, would you need to make you secondary injs negative too?
I changed my primaries to a -.30 last night and got my idle to about 12.9. I had to obviously re-tune my map but it was already pretty linear, all it needed was on average 20% more fuel across the board. PLUS I got my light throttle to finally read a LEAN AFR instead of always pegging 11.5afr, WOOT WOOT!!

MaczPayne · 08-21-2009, 11:51 AM

Quote:

Originally Posted by FC3S Murray

Shit my boost controller reads -15 now at idle. Max, yours is -7.3 at partial throttle then??

is -15 in inches of mercury? It cannot be psi since complete vacuum on earth is -14.5psi. My idle is -7.3psi, or -15 in Hg

Quote:

Originally Posted by TitaniumTT

I understand what you're saying. Basically need to reference out the difference between mani pressure and atmosphere right?

So then, how would one go about getting the "standard" "hg from a kpa reading? I know there is a descrepancy between my Motec and autometer gauge. But when the Motec reads 50 kpa, the AM says ~14-15"hg. 10 kpa = ~25"hg. So, how does one go about converting the kpa reading to the standard "hg?

What units does the Motec show when you are in boost? Is it still kpa? Does the kpa value decrease when you open the throttle?

If the reading is kpa in boost:
The Motec most likely references absolute pressure. So all you have to do is a simple subtraction. Atmospheric pressure is 14.5psi, or 100kpa. Since the Motec reads 50kpa at idle, 100kpa(atmospheric) - 50kpa(gauge) = 50kpa (your vacuum), which is also equal to 14.764" Hg. Pretty smack dab where your AM reads!

***TitaniumTT*** · 08-21-2009, 03:23 PM

Yes, it reads in kpa. 175kpa = roughly 10-11pounds of boost, becuase were subtracting the "reference" atmosphere. So, for example this morning she was idling and reading ~45-40 kpa, subtracting the "reference" gives us 55-60 kpa or 16-18 "hg as our gauges read it. Am I finally right? Can I stop cutting myself now?

MaczPayne · 08-21-2009, 09:08 PM

Indeed, Brian, you've got it! You can stop cutting yourself, haha! I would pop open beers for us if I were there!

FC3S Murray · 08-22-2009, 12:53 PM

Update: I ended up going back to my old map set up and original inj lag settings. The negative lag was nice at idle but was causing a lot of issues. It would sparatically fall to extremly lean idle conditions for no reason, even after I map sure my inj firing MS and duty % were linear. EVen my base map idel area was linear to ensure no pulsing idle or abnormalities.

My idle with negative lag was around 12.3/12.1
With my orignal map with NO lag my idle AFR jumps from 11.2-11.5

I REALLY dont like the idle that rich because I know it will foul plugs and it makes my idle sound very "brap brap brap" ish. With negative lag the idle sound was a smooth pur.

my problem going excessivly rich at light throttle in cruise is fixed now becasue I just had some high numbers in my p2, p3 areas(You dont need to lower them much to get them lean when the base map inj reading is like .620

)

I went out and took some pics yesterday before a three hour tune in 95 degree weather WITHOUT A/C. Sucked balls! I really wish I didnt remove that back in the day when I was trying to squeeze out as much power as possible from the stock set up lol.

EGT set up

I plan on moving the EGT gauges to my center consule this winter..

FC3S Murray · 08-22-2009, 12:53 PM

Video

WE3RX7 · 08-22-2009, 06:38 PM

Awesome ride man... I'm glad its all working out for you. That blue makes me want to get my FC on the road all the sooner.... I know its not the same, but something about blue FCs... mmmmmm...

FC3S Murray · 08-23-2009, 11:31 AM

Quote:

Originally Posted by WE3RX7

Awesome ride man... I'm glad its all working out for you. That blue makes me want to get my FC on the road all the sooner.... I know its not the same, but something about blue FCs... mmmmmm...

Thank you bro! I like blue as well, it brings the lines of the car out very well.

project86 · 08-23-2009, 01:09 PM

Fantastic Sean! yeah that 95 day was kinda wierd. how many miles now?

FC3S Murray · 08-23-2009, 06:01 PM

157 mile now bro. Wish I could be there to pull the motor with ya tonight. bummer

MaczPayne · 08-24-2009, 12:42 AM

Mmmm. Sounds good!

classicauto · 08-24-2009, 02:56 PM

seck-say

FC3S Murray · 08-24-2009, 09:43 PM

Thanks for the kind words guys. I have about 289 on the motor now. This is gonna take a while BUT will be worth it.

***TitaniumTT*** · 08-24-2009, 11:16 PM

Drive more

It's a combo of miles and heat cycles. Drive like 75 miles a day and you'll be real broken in in about 1.5-2 weeks

08-20-2009, 08:28 PM	#196
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	I understand what you're saying. Basically need to reference out the difference between mani pressure and atmosphere right? So then, how would one go about getting the "standard" "hg from a kpa reading? I know there is a descrepancy between my Motec and autometer gauge. But when the Motec reads 50 kpa, the AM says ~14-15"hg. 10 kpa = ~25"hg. So, how does one go about converting the kpa reading to the standard "hg? __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

08-21-2009, 07:44 AM	#197
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	Check this link out brian: http://www.sensorsone.co.uk/pressure...onversion.html * use the right hand side bar Does anyone know off the top of there head if you decide to use negative lag on your primary injectors for the PFC, would you need to make you secondary injs negative too? I changed my primaries to a -.30 last night and got my idle to about 12.9. I had to obviously re-tune my map but it was already pretty linear, all it needed was on average 20% more fuel across the board. PLUS I got my light throttle to finally read a LEAN AFR instead of always pegging 11.5afr, WOOT WOOT!! __________________ Same pig, new soul

08-21-2009, 03:23 PM	#199
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Yes, it reads in kpa. 175kpa = roughly 10-11pounds of boost, becuase were subtracting the "reference" atmosphere. So, for example this morning she was idling and reading ~45-40 kpa, subtracting the "reference" gives us 55-60 kpa or 16-18 "hg as our gauges read it. Am I finally right? Can I stop cutting myself now? __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

08-21-2009, 09:08 PM	#200
MaczPayne Bah! Join Date: Mar 2008 Location: Riverside, SoCal iTrader: (1) Posts: 442 Rep Power: 17	Indeed, Brian, you've got it! You can stop cutting yourself, haha! I would pop open beers for us if I were there! __________________ Johnson TA FC in the works!

08-22-2009, 12:53 PM	#201
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	Update: I ended up going back to my old map set up and original inj lag settings. The negative lag was nice at idle but was causing a lot of issues. It would sparatically fall to extremly lean idle conditions for no reason, even after I map sure my inj firing MS and duty % were linear. EVen my base map idel area was linear to ensure no pulsing idle or abnormalities. My idle with negative lag was around 12.3/12.1 With my orignal map with NO lag my idle AFR jumps from 11.2-11.5 I REALLY dont like the idle that rich because I know it will foul plugs and it makes my idle sound very "brap brap brap" ish. With negative lag the idle sound was a smooth pur. my problem going excessivly rich at light throttle in cruise is fixed now becasue I just had some high numbers in my p2, p3 areas(You dont need to lower them much to get them lean when the base map inj reading is like .620 ) I went out and took some pics yesterday before a three hour tune in 95 degree weather WITHOUT A/C. Sucked balls! I really wish I didnt remove that back in the day when I was trying to squeeze out as much power as possible from the stock set up lol. EGT set up I plan on moving the EGT gauges to my center consule this winter.. __________________ Same pig, new soul

08-22-2009, 12:53 PM	#202
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	Video __________________ Same pig, new soul

08-22-2009, 06:38 PM	#203
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA iTrader: (1) Posts: 1,812 Rep Power: 18	Awesome ride man... I'm glad its all working out for you. That blue makes me want to get my FC on the road all the sooner.... I know its not the same, but something about blue FCs... mmmmmm...

08-23-2009, 01:09 PM	#205
project86 Can't.Make.Up.My.Mind. Join Date: May 2009 Location: Murfreesboro, TN iTrader: (3) Posts: 1,377 Rep Power: 17	Fantastic Sean! yeah that 95 day was kinda wierd. how many miles now? __________________ '90 GTUs Stay up to date with my photography '06 Toyota Highlander Hybrid '10 Toyota Prius "Initial Success or Total Failure"

08-23-2009, 06:01 PM	#206
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	157 mile now bro. Wish I could be there to pull the motor with ya tonight. bummer __________________ Same pig, new soul

08-24-2009, 12:42 AM	#207
MaczPayne Bah! Join Date: Mar 2008 Location: Riverside, SoCal iTrader: (1) Posts: 442 Rep Power: 17	Mmmm. Sounds good! __________________ Johnson TA FC in the works!

08-24-2009, 09:43 PM	#209
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	Thanks for the kind words guys. I have about 289 on the motor now. This is gonna take a while BUT will be worth it. __________________ Same pig, new soul

08-24-2009, 11:16 PM	#210
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Drive more It's a combo of miles and heat cycles. Drive like 75 miles a day and you'll be real broken in in about 1.5-2 weeks __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**