Post up if you have a 3bar SD EFI/HPT tuned stock pcm FI car.
07-09-2007, 06:39 PM
#61
You know I have that set up on the balck car, but i haven't tuned **** on it I just barely got the motor back so I havent put it back together yet. Once I do I am going to get a little help and do it myself I already bought the software for the car etc.. It was running a HPT 3 Bar setup using a GM 3bar. Ran pretty goo had some quirkey issues I think it was because of the tuner though. You will do fine with it Tom! You have been very helpful with your knowledge I feel this will be no different for you.
07-09-2007, 08:29 PM
#62
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Thanks. This is an old thread someone brought back from 2006. 3bar is working great....good enough to snap the main shaft in my Rossler T400....lol..
07-09-2007, 09:21 PM
#65
Originally Posted by onfire
Thanks. This is an old thread someone brought back from 2006. 3bar is working great....good enough to snap the main shaft in my Rossler T400....lol..
Jeff
07-09-2007, 10:07 PM
#66
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Originally Posted by Inspector12
LOL I didn't even look at the dates LOL! Yeah I thought we had already talked about all this stuff.
Jeff
Jeff
I just caught a glimpse of this cause I think it's about time I did this. Do you guys know where i can get a map sensor extention harness that will plug into the factory plug and extend to older style GM 3 bar? Also what is the preferred GM 3 bar map-sorry but the search is giving me fits!!!
07-09-2007, 10:43 PM
#67
Originally Posted by eb02z06
I just caught a glimpse of this cause I think it's about time I did this. Do you guys know where i can get a map sensor extention harness that will plug into the factory plug and extend to older style GM 3 bar? Also what is the preferred GM 3 bar map-sorry but the search is giving me fits!!!
07-10-2007, 07:44 AM
#68
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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
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
07-10-2007, 08:15 AM
#69
Originally Posted by eb02z06
Does anyone have any tunes to post up with the basic tables to start with for a 3 bar tune and some 96lb injectors?
07-10-2007, 09:47 AM
#70
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Originally Posted by smokinHawk
i still have tiagos tune from when he sent me, give me your email and ill send it to you if you want.
Thanks alot!
07-11-2007, 03:11 PM
#72
Originally Posted by Inspector12
It was running a HPT 3 Bar setup using a GM 3bar. Ran pretty goo had some quirkey issues I think it was because of the tuner though.
JMHO
07-11-2007, 03:33 PM
#73
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Originally Posted by NoGo
Some quirkey things start to happen when you above 75 lb/hr injectors on the stock computer. I think the limitations on min pulse width start to goober with some of the throttle tip-in and de-acceleration fueling.
JMHO
JMHO
I was going to go with the RC 75lb's but I've heard from several people that they have issues of there own, problems with hot starts , sitting unused over the winter etc.
I think as time goes on and we keep making sick "streetable" power out of these motors we'll be able to dial in these 96lb injectors like stock ones.
07-11-2007, 03:35 PM
#74
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Originally Posted by eb02z06
Maybe it would be a better idea to use a low impedance 72lb injector at 44 psi then boost refrence it? At 20 psi or 64 psi of fuel pressure it would be a 87 lb injector. You would need the 60lb mototrons to go to 78 psi to achieve the same flow but then that hi pressure takes a toll on the pumps-especially if your using a street setup like the dual Walbro's.
I was going to go with the RC 75lb's but I've heard from several people that they have issues of there own, problems with hot starts , sitting unused over the winter etc.
I think as time goes on and we keep making sick "streetable" power out of these motors we'll be able to dial in these 96lb injectors like stock ones.
I was going to go with the RC 75lb's but I've heard from several people that they have issues of there own, problems with hot starts , sitting unused over the winter etc.
I think as time goes on and we keep making sick "streetable" power out of these motors we'll be able to dial in these 96lb injectors like stock ones.
07-12-2007, 08:25 AM
#75
I run the 75 RC's as well. They work fine, but are a bit quirkey. I recommend the 60# mototrons to everybody instead.
FYI:
A 60# injector at 44psi of fuel pressure flows the same as a 60# injector at 64psi of fuel pressure spraying into a manifold at 20 psi.
How much an injector flows is pertinant on the pressure difference across the injector, not just the fuel rail pressure.
FYI:
A 60# injector at 44psi of fuel pressure flows the same as a 60# injector at 64psi of fuel pressure spraying into a manifold at 20 psi.
How much an injector flows is pertinant on the pressure difference across the injector, not just the fuel rail pressure.
07-12-2007, 08:29 AM
#76
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Originally Posted by NoGo
I run the 75 RC's as well. They work fine, but are a bit quirkey. I recommend the 60# mototrons to everybody instead.
FYI:
A 60# injector at 44psi of fuel pressure flows the same as a 60# injector at 64psi of fuel pressure spraying into a manifold at 20 psi.
How much an injector flows is pertinant on the pressure difference across the injector, not just the fuel rail pressure.
FYI:
A 60# injector at 44psi of fuel pressure flows the same as a 60# injector at 64psi of fuel pressure spraying into a manifold at 20 psi.
How much an injector flows is pertinant on the pressure difference across the injector, not just the fuel rail pressure.
Your exactly right on that fuel flow issue Kevin-I learned that when I thought 96's at 44 psi no boost reference will be enough.
07-12-2007, 08:43 AM
#77
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I'm sure a decent boost referenced fuel pressure regulator would do the trick, no? I thought everyone running high hp apps boosted were running them already.
