Post up if you have a 3bar SD EFI/HPT tuned stock pcm FI car.
12-23-2006, 12:46 PM
#22
Denso brand O2 sensors resist lead fouling better than any other sensor. The NTK L1H1 and L2H2 wide band sensors are also lead compatible. You need wideband that uses these sensors though and they cost bout $200 each. I've been using the same sensor for over 3 years. In that same 3 years i've gone through 4 or 5 LSU sensors on different widebands, much more expensive over all than my NTK setup.
12-23-2006, 05:29 PM
#24
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FJO is one....
I run HPT 3 bar. No complaints on the tuning ability of it. Im running hte 3 bar MAP that devil's own sells on their site, costs 1/3 of GM sensor and gets r dun
I run HPT 3 bar. No complaints on the tuning ability of it. Im running hte 3 bar MAP that devil's own sells on their site, costs 1/3 of GM sensor and gets r dun
12-25-2006, 05:23 PM
#25
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I am on 3 bar running great, after some trouble with the Nossle kit. Hard to beat. I have tuned cars on FAST, Gen7, AEM, lots of other systems and the HPT is working very good so far. I am only on 10 psi so far but that is about 1 hr of street tuning. Should be hitting up the dyno sometime this week. I am mainly worried about gas mileage at this point. That is what makes or breaks a system in my opinion. I am seeing about 13 MPG now. Should be able to get 18 or so MPG city with more tuning.
12-25-2006, 08:39 PM
#27
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Have been using 3 bar SD tune EFI on stock pcm 18 months ago
Curoius though its easy enough to tune on 3 bar but whos combo is actually using this much boost on the street to warrant it.
What injector sizing you using, I started with 96 lb and we found that there is limited potential using a injector convertor on a stock pcm. The idle and low range in particular are hard to control on larger injector with stock pcm.
This doesnt mean you cant tune a 3 bar but at 30psi you need some decent injector sizing hence my comment if you are running 70lb injectors you dont need 3 bar.
I ditched the impedance convertor and went Autronic made life so much easier. we are presently tuning on 160 lb injectors and @40 psi
Curoius though its easy enough to tune on 3 bar but whos combo is actually using this much boost on the street to warrant it.
What injector sizing you using, I started with 96 lb and we found that there is limited potential using a injector convertor on a stock pcm. The idle and low range in particular are hard to control on larger injector with stock pcm.
This doesnt mean you cant tune a 3 bar but at 30psi you need some decent injector sizing hence my comment if you are running 70lb injectors you dont need 3 bar.
I ditched the impedance convertor and went Autronic made life so much easier. we are presently tuning on 160 lb injectors and @40 psi
12-25-2006, 09:52 PM
#28
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We are on 96lb. I do not think going SD will make you lose MPG. On my car stock everything I was seeing 18 ish MPG. I tuned teh car in open loop on ls1 edit and saw 24 mpg.
12-27-2006, 07:31 AM
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Originally Posted by Frost
Any data/spec sheets on these?
What am I, the map cop?
I dug into map sensors and called the Delphi engineering department because of all the conflicting info I was getting. Surprising info is most 3bar maps used by MSD, FAST, etc are Delphi 12223861 since it has the best low end resolution. They just put their part number on it.
Some Delphi Map sensor tech:
Stock 1 bar
kPa +-%Error
15 2.4
40 1.5
94 1.5
102 1.7
Delphi 2bar
kPa +-%Error
20 4.2
40 2.4
160 2.4
200 3.2
Delphi 3bar (12223861)
kPa +-%Error
40 8.0
71 4.7
240 4.7
301 8.0
Delphi 3.3bar 09373269 and 12215049
kPa +-%Error
50 9.0
70 6.0
270 6.0
333 9.0
12-27-2006, 11:06 AM
#37
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Originally Posted by onfire
Delphi 3bar (12223861)
kPa +-%Error
40 8.0
71 4.7
240 4.7
301 8.0
We found the same sensor last night after some research... It has the same resolution as the old big 3 bar GM sensor. We are taking off the Cobalt 2 bar sensor and going with the 12223861 sensor instead.
12-27-2006, 07:34 PM
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Originally Posted by koji777
3 bar here, 96#ders idles rich, poor power transition... looking for a fix.help!!!!!!!!!!!!
12-29-2006, 09:33 PM
#40
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Here is a 3bar screen shot that shows a cruise with a 44kPa reading and a changing TP. Note the command AF and the actual AF from the wideband. It will give you an idea of the accuracy you can get from a 3bar.