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lyckaon
Joined: 28 Jan 2007
Posts: 13
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 Posted: Mon Aug 20, 2007 8:45 am Post subject: Rom advice (CA18det euro cat/444cc/RB20 maf/t28bb 1.2bars) |
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Hello!
What do you think about my rom? It's for a CA18det with 444cc/RB20 MAF/T28bb at 1.2Bars...
http://www.fast-files.com/getfile.aspx?file=13406
Thanks a lot |
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cb_drift
Joined: 04 May 2004
Posts: 472
Location: New Zealand
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| Posted: Mon Aug 20, 2007 10:19 am Post subject: |
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looks sane....
safeish timing - tonnes of fueling
when your driving fast - does it change gear smoothly without hesitation? |
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tineira
Joined: 10 May 2005
Posts: 60
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| Posted: Mon Aug 20, 2007 1:22 pm Post subject: |
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Looks good. Its very similar to my setup, I'll post my tune when I finish it.
The only strange thing I see on your map is the TP scale on the ignition map. You changed the scale, it's the same as the fuel map, but you didn't change any value on the map. |
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raddy
Joined: 29 Nov 2005
Posts: 95
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| Posted: Mon Aug 20, 2007 1:25 pm Post subject: |
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| too much axpanded TP scale for fuel and timing, up to about 90 should be more than enough for 444cc injectors. timing looks pretty advanced for me at area of about TP=80. I think that with your setup you will never hit TP more than let say 80.... |
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tineira
Joined: 10 May 2005
Posts: 60
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| Posted: Mon Aug 20, 2007 3:57 pm Post subject: |
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| raddy wrote: | | too much axpanded TP scale for fuel and timing, up to about 90 should be more than enough for 444cc injectors. timing looks pretty advanced for me at area of about TP=80. I think that with your setup you will never hit TP more than let say 80.... |
With his setup, 1.2 bar should be about TP=125. |
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lyckaon
Joined: 28 Jan 2007
Posts: 13
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| Posted: Wed Aug 22, 2007 5:41 am Post subject: |
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Hi!
Thanks for your reply... but the TP scale is correct or not?
Thanks |
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raddy
Joined: 29 Nov 2005
Posts: 95
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| Posted: Wed Aug 22, 2007 6:51 am Post subject: |
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in very good commercial map for standard ca18det for up to 1bar is TP up to 91. This is for 1bar at T25 with standard 370cc injectors.
Now recalculate for 444cc injectors, you will get TP up to about 76. Still for 1bar. Now expand it for 1.2bar, ratio 1.2, so TP should be 92. Why 125?
My very good map for ca18det/444cc injectors/T3 turbo/1.2bar have max. TP 77 for fuel and 91 for ignition. At TP 77/6800rpm have injectors 98% duty cycle (calculated at liveedit, AFR about 11:1 at real life). No way why TP should be more expanded, as injectors are limited to its 100% duty cycle....
Thats my opinion why I think that at least TP scale is too much expanded.... |
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lyckaon
Joined: 28 Jan 2007
Posts: 13
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| Posted: Wed Aug 22, 2007 12:10 pm Post subject: |
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Hi!
Thanks for your advices!
I have done some searches on the net and if I understand right:
TP = (VQ x K Value / CAS Value) / Number of Cylinders
also if VQ is higher than STD => TP is higher? and if K is higher than STD => TP is higher?
I do some modifications on an excel page that calcul that...
http://www.fast-files.com/getfile.aspx?file=14080
Last edited by lyckaon on Fri Aug 31, 2007 6:48 am; edited 1 time in total |
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raddy
Joined: 29 Nov 2005
Posts: 95
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| Posted: Wed Aug 22, 2007 2:05 pm Post subject: |
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look at this two fuel maps in liveedit. at left is your binary, at right is one of the best commercial binary exactly for your setup. did you notice differences?
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tineira
Joined: 10 May 2005
Posts: 60
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| Posted: Wed Aug 22, 2007 2:51 pm Post subject: |
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| raddy wrote: | This is for 1bar at T25 with standard 370cc injectors.
Now recalculate for 444cc injectors, you will get TP up to about 76. Still for 1bar. Now expand it for 1.2bar, ratio 1.2, so TP should be 92. Why 125? |
In short, from experience and Live Edit. When you have the correct K value for your AFM and Injectors, and Live Edit correctly setup, above the TP scale of Live Edit there is a "Boost" equivalent to the TP number. In his case TP 125 = 1.2 Bar. I tested this values, setting the TP Limiter to different numbers and watching at how much boost the car hit the limiter. |
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lyckaon
Joined: 28 Jan 2007
Posts: 13
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| Posted: Wed Aug 22, 2007 6:36 pm Post subject: |
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| raddy wrote: | look at this two fuel maps in liveedit. at left is your binary, at right is one of the best commercial binary exactly for your setup. did you notice differences?
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It's normal :
I add some fuel in mid TP/RPM and lean at High TP/RPM.
The car is not tune, it's a base map. |
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raddy
Joined: 29 Nov 2005
Posts: 95
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| Posted: Thu Aug 23, 2007 6:10 am Post subject: |
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| tineira wrote: | | raddy wrote: | This is for 1bar at T25 with standard 370cc injectors.
Now recalculate for 444cc injectors, you will get TP up to about 76. Still for 1bar. Now expand it for 1.2bar, ratio 1.2, so TP should be 92. Why 125? |
In short, from experience and Live Edit. When you have the correct K value for your AFM and Injectors, and Live Edit correctly setup, above the TP scale of Live Edit there is a "Boost" equivalent to the TP number. In his case TP 125 = 1.2 Bar. I tested this values, setting the TP Limiter to different numbers and watching at how much boost the car hit the limiter. |
Thanks for explanation. What you mean by limiter? As reaching maximum TP doesnt cause any kind of limiter, did you mean AFM limiter (fuel cut)?
Also, if I undestant correctly, TP scale is not directly related to the boost, but to the airflow or airmass. You can have more airflow through AFM (hence more TP) with less boost, if engine have increased VE (intake, exhaust restrictions) and vice versa. |
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raddy
Joined: 29 Nov 2005
Posts: 95
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| Posted: Thu Aug 23, 2007 6:11 am Post subject: |
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| lyckaon wrote: | | raddy wrote: | look at this two fuel maps in liveedit. at left is your binary, at right is one of the best commercial binary exactly for your setup. did you notice differences?
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It's normal :
I add some fuel in mid TP/RPM and lean at High TP/RPM.
The car is not tune, it's a base map. |
OK then. Any special reason for fuel enrichment in mid range? |
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lyckaon
Joined: 28 Jan 2007
Posts: 13
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| Posted: Thu Aug 23, 2007 7:20 am Post subject: |
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| It's to have a ~13.5 AF ratio in full throttle (no or low boost/ low RPM) and in mild throttle low boost range for more power... if it's like atmo engines? |
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