If you're running MAF-less, the COS retains the HO/LO adaptive spark feature.
If you're running MAF-less, the COS retains the HO/LO adaptive spark feature.
I'm off to a slow start today, but I'll get to your files before the weekend is out.
DOH---Your right. Thanks for the correction Joe. Sorry about that Bruce. I don't know why I arrived at that.Originally Posted by joecar
Your B4001 IFR table needs to be filled top to bottom with the same value as the "0" column for a "Return" style fuel system.
Jeff
98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb.inj., 0411PCM, COS3,4675LBS w/me in it. Best Time on 5 passes-13.01@110
No problem Jeff! I filled the B4001 w/values from an injector calculator for the injectors I'm using. I understood to fill the colomn with the calculated flow numbers which I did. I'm not grasping the concept of the "Return" system's reliance on this table yet so bear with me.
As far as the 113 kpa for boost, (@ 5,000') equates to 4psi+/- is this close?
Good times!!
Bruce
Brucemobile: '91 S10 Blazer 4dr, 4x4 - '96 4.3 Vortec V6-stock, '0411 PCM conversion, marine manifold conversion, 44# Deka injectors, intercooled Procharger P1SC w/3.2 pulley, Headman long tube headers - 3" single exhaust, custom 700r4, 2500 stall w/lockup, 2002 S10 Blazer suspension and 4 wheel disc brakes, coil over front suspension conversion-torsion bar delete, zexel torsen posi 3.42 w/ 245/45r17's. EFILive tuning.
No, Every 10 Kpa above 105 is about 1.5 lbs boost. (115 is 1.5, 125 is 3.0, 135 is 4.5, 145 is 6.0, 155 is 7.5------and so on) These are very close approximates.
Jeff
98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb.inj., 0411PCM, COS3,4675LBS w/me in it. Best Time on 5 passes-13.01@110
I must have a lot of leaks then. I'll need to make a test cap w/a shrader valve to pressurize and test for leaks. I have a LOT of connections w/ the intercooler in front of the A/C condenser so I'll have my work cut out for me there. The 3.6 pulley is supposed to be good for 10psi on this motor but I do have a March aluminum underdrive crank pulley and it could be slipping.
Brucemobile: '91 S10 Blazer 4dr, 4x4 - '96 4.3 Vortec V6-stock, '0411 PCM conversion, marine manifold conversion, 44# Deka injectors, intercooled Procharger P1SC w/3.2 pulley, Headman long tube headers - 3" single exhaust, custom 700r4, 2500 stall w/lockup, 2002 S10 Blazer suspension and 4 wheel disc brakes, coil over front suspension conversion-torsion bar delete, zexel torsen posi 3.42 w/ 245/45r17's. EFILive tuning.
I was thinking that you would go from absolute pressure which is 87kpa? then do the math which is how I got the 4psi. Anyhow it runs much better with the COS3 and 2bar MAP then it did before. Must be the 1.5psi boost- hehe. However the boost gauge seemed to be consistently pushing the 5# spot by 5000+rpm...furthering my confusion.
Good times!
Bruce
Brucemobile: '91 S10 Blazer 4dr, 4x4 - '96 4.3 Vortec V6-stock, '0411 PCM conversion, marine manifold conversion, 44# Deka injectors, intercooled Procharger P1SC w/3.2 pulley, Headman long tube headers - 3" single exhaust, custom 700r4, 2500 stall w/lockup, 2002 S10 Blazer suspension and 4 wheel disc brakes, coil over front suspension conversion-torsion bar delete, zexel torsen posi 3.42 w/ 245/45r17's. EFILive tuning.
[QUOTE=overS10ded;197714] I filled the B4001 w/values from an injector calculator for the injectors I'm using. I understood to fill the colomn with the calculated flow numbers which I did. I'm not grasping the concept of the "Return" system's reliance on this table yet so bear with me.
Went back to the injector calculator and found the instruction of entering only the 0 MAP value in the entire table so I will do that. Thanks Jeff!!
Good times!
Bruce
Brucemobile: '91 S10 Blazer 4dr, 4x4 - '96 4.3 Vortec V6-stock, '0411 PCM conversion, marine manifold conversion, 44# Deka injectors, intercooled Procharger P1SC w/3.2 pulley, Headman long tube headers - 3" single exhaust, custom 700r4, 2500 stall w/lockup, 2002 S10 Blazer suspension and 4 wheel disc brakes, coil over front suspension conversion-torsion bar delete, zexel torsen posi 3.42 w/ 245/45r17's. EFILive tuning.
Return system = return line from FPR to fuel tank = FPR is MAP-referenced = IFR table is flat (i.e. FPR accounts for change in MAP) --> enter the 0 kPa value to all cells.
Returnless system = no return line from FPR = FPR is un-referenced = IFR table is sloped (i.e. PCM accounts for change in MAP)
I assume this is a CPI Injection 1991 4.3? Not TBI
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