42.5 Injectors static line setting

[ledzeppac]

Obviously I'm not gonna argue with Neal, BUT....

His bls are still pegged rich... so no amount of octane is gonna fix that.
Maybe you have a header leak?

 

[750H.P.V6]

Phil,

The BLM problem is more than likely due to the injector constant Red is running in the 42.5 LB chip. If the injector constant is too small or to large it will adversly effect the BLM's. The other thought is that running leaded gas will start to poison the 02 sensor which will effect BLM's also.

Neal

Obviously I'm not gonna argue with Neal, BUT....

His bls are still pegged rich... so no amount of octane is gonna fix that.
Maybe you have a header leak?

 

[EGOKILR]

Still hear slight leak only on start up, which is probably still a leak

Obviously I'm not gonna argue with Neal, BUT....

His bls are still pegged rich... so no amount of octane is gonna fix that.
Maybe you have a header leak?

Maybe this comes back to my original question, I am supposedly running to rich so where should I set my static line off to. Its at 37 now and I believe min is 33. Maybe I will work my way down and see If I still get BLs rich.

 

[750H.P.V6]

As you bring down your fuel pressure the BLM values will go up. Also as you bring down the fuel pressure the car should lean out at WOT too. I'd be more interested in the WOT O2 voltage as a reflection of the air fuel ratio than the BLM's myself. The thing with BLM's is that as long as they are in the range between 100-150 on a stock chip and 90-160 on an aftermarket chip you're fine. The computer is able to make the necessary adjustments to the injector pulse width to maintain a 14.7 to 1 A/F ratio. If the BLM values are bottomed out across the board or conversley all high then you have a problem. Back to my original statement that the 108 chip isn't intended to be a street chip.

Neal

Maybe this comes back to my original question, I am supposedly running to rich so where should I set my static line off to. Its at 37 now and I believe min is 33. Maybe I will work my way down and see If I still get BLs rich.

 

[ledzeppac]

As you bring down your fuel pressure the BLM values will go up. Also as you bring down the fuel pressure the car should lean out at WOT too. I'd be more interested in the WOT O2 voltage as a reflection of the air fuel ratio than the BLM's myself. The thing with BLM's is that as long as they are in the range between 100-150 on a stock chip and 90-160 on an aftermarket chip you're fine. The computer is able to make the necessary adjustments to the injector pulse width to maintain a 14.7 to 1 A/F ratio. If the BLM values are bottomed out across the board or conversley all high then you have a problem. Back to my original statement that the 108 chip isn't intended to be a street chip.

Neal

ok ok... I get it.

So, is my bls 115 on the freeway at 70 mph killing my fuel mileage? I know I have a header/crossover leak that needs to be adressed....

 

[turbolou]

Reply

As you bring down your fuel pressure the BLM values will go up. Also as you bring down the fuel pressure the car should lean out at WOT too. I'd be more interested in the WOT O2 voltage as a reflection of the air fuel ratio than the BLM's myself. The thing with BLM's is that as long as they are in the range between 100-150 on a stock chip and 90-160 on an aftermarket chip you're fine. The computer is able to make the necessary adjustments to the injector pulse width to maintain a 14.7 to 1 A/F ratio. If the BLM values are bottomed out across the board or conversley all high then you have a problem. Back to my original statement that the 108 chip isn't intended to be a street chip.

Neal

Thanks Neal for the clarification. I have made the same remarks about this BLM nonsense & I hope ( 11's capable ) Harold is also paying attention, ECU has the ability to compensate for normal variables & you will drive yourself nut's trying to maintain perfect numbers. If gas mileage is a big concern than leave the car stock & drive 55, but in the slow lane please. These scan masters are a useful device only if you understand automotive principles & what is really a cause for concern. While your at it you might explain that when the knock sensor is active under certain conditions especially with our poor fuel it's also doing what it's designed to do. Happy mother's day Lou

 

[ledzeppac]

Thanks Neal for the clarification. I have made the same remarks about this BLM nonsense & I hope ( 11's capable ) Harold is also paying attention, ECU has the ability to compensate for normal variables & you will drive yourself nut's trying to maintain perfect numbers. If gas mileage is a big concern than leave the car stock & drive 55, but in the slow lane please. These scan masters are a useful device only if you understand automotive principles & what is really a cause for concern. While your at it you might explain that when the knock sensor is active under certain conditions especially with our poor fuel it's also doing what it's designed to do. Happy mother's day Lou

Well it really wasnt until gas rose to $23442597 a gallon and I became handicaped... Btw operation #3 is on the way

Lou whats your base fuel pressure for your chip?

Thanks for the clarifiaction guys I had no idea that the chip could calculate it perfectly if bls are all over the place. I thought the chip would only set it correctly if it was in a certain range +-10 at 128

 

[turbolou]

Reply

Well it really wasnt until gas rose to $23442597 a gallon and I became handicaped... Btw operation #3 is on the way

Lou whats your base fuel pressure for your chip?

Thanks for the clarifiaction guys I had no idea that the chip could calculate it perfectly if bls are all over the place. I thought the chip would only set it correctly if it was in a certain range +-10 at 128

Chips are designed to provide preset target values for the computer to adjust for hence the term BLM's If a chip is designed properly using the correct size & flow rate injectors stock fuel pressure should suffice as a start with base line setting. Now this is an over simplified answer to your question. Every car & application is different so a one size chip fits all doesn't always work. Why our cars work so well is that the system is set up for that. Provided that we work within a certain set of limits. What we have with forced induction think of it as having two parameters that have to interface with one another. Low level non boost & then going into crossover & boost. When you jack the fuel pressure around you change the whole map. So a properly designed chip/programming needs to be able to compensate for all that.This is where basic understanding & experience is the rule. The people I have to give credit to are the engineers & programmers that come up with this stuff to begin with.I'm sure Neal could add to this & explain it a little better as it's an interesting topic & could clear up some misconceptionsl. Lou

 

[wiked87gn]

Well it really wasnt until gas rose to $23442597 a gallon and I became handicaped... Btw operation #3 is on the way

Lou whats your base fuel pressure for your chip?

Thanks for the clarifiaction guys I had no idea that the chip could calculate it perfectly if bls are all over the place. I thought the chip would only set it correctly if it was in a certain range +-10 at 128

get a hold of me i will fix your BLM problem for yah since none of these dinosour guys aren't able to do it .. my BLM's are rock steady 130/128 at idle and 127 to 134 at cruise, and they lock at 128 at WOT part of what my chip does, but the fact is if if you have an air leak pass the MAF the ECU will compensate by adding fuel thus high BLM's and i wouldnt recomment you close your garage door and leave he car running if your BLM's are higher than 135 because you will feel your eyes and nose start to burn, if they are lower then the problem maybe an injector stuck open, fuel pressure regulator dumping too much fuel , wrong fuel pressure etc etc, as far as the BLM's not being that important i would dissagree with that, too lean or too rich will give you wrong readings on the scanmaster at WOT, so you will never be able to tune your car right.. im not trying to start a BLM war here just stating my opinion..and yes i do respect Neals and Lous opinions on the matter respectively.
wiked.

 

[750H.P.V6]

Kevin,

As usual you have about 2/3 grasp of the complete concept but much more than most people so for that I give you credit. Back to your statement about chips that lock the BLM at WOT, we've been doing that for years. The stock chip and some aftermarket programmers don't. BLM values will always change during normal driving over different terrain, altitude, load, road speed etc. Having your BLM at 128 isn't the be all end all. As far as you fixing it, I would tell you that you can adjust it by playing with translator settings which modifies the MAF readings but if the injector constant in the chip is wrong you can't fix it without re-programming the chip. I also wouldn't recommend that you not leave your car running in the garage for any reason since there is a very real possibility of carbon monoxide poisoning.

Neal

get a hold of me i will fix your BLM problem for yah since none of these dinosour guys aren't able to do it .. my BLM's are rock steady 130/128 at idle and 127 to 134 at cruise, and they lock at 128 at WOT part of what my chip does, but the fact is if if you have an air leak pass the MAF the ECU will compensate by adding fuel thus high BLM's and i wouldnt recomment you close your garage door and leave he car running if your BLM's are higher than 135 because you will feel your eyes and nose start to burn, if they are lower then the problem maybe an injector stuck open, fuel pressure regulator dumping too much fuel , wrong fuel pressure etc etc, as far as the BLM's not being that important i would dissagree with that, too lean or too rich will give you wrong readings on the scanmaster at WOT, so you will never be able to tune your car right.. im not trying to start a BLM war here just stating my opinion..and yes i do respect Neals and Lous opinions on the matter respectively.
wiked.

 

[ledzeppac]

Kevin,

As usual you have about 2/3 grasp of the complete concept but much more than most people so for that I give you credit. Back to your statement about chips that lock the BLM at WOT, we've been doing that for years. The stock chip and some aftermarket programmers don't. BLM values will always change during normal driving over different terrain, altitude, load, road speed etc. Having your BLM at 128 isn't the be all end all. As far as you fixing it, I would tell you that you can adjust it by playing with translator settings which modifies the MAF readings but if the injector constant in the chip is wrong you can't fix it without re-programming the chip. I also wouldn't recommend that you not leave your car running in the garage for any reason since there is a very real possibility of carbon monoxide poisoning.

Neal

Ok... again not trying to argue but just get an understanding...

So why an adjustable regulator? Why doesnt all chip burners burn a chip for a stock 233 regulator? And I know most chips lock bls at 128 @ WOT... then shouldnt there never be a problem with running rich or lean? If its locked wouldnt it automatically be perfect?... Or is it just a matter of what a particular car likes.?

 

[turbolou]

Reply

Kevin,

As usual you have about 2/3 grasp of the complete concept but much more than most people so for that I give you credit. Back to your statement about chips that lock the BLM at WOT, we've been doing that for years. The stock chip and some aftermarket programmers don't. BLM values will always change during normal driving over different terrain, altitude, load, road speed etc. Having your BLM at 128 isn't the be all end all. As far as you fixing it, I would tell you that you can adjust it by playing with translator settings which modifies the MAF readings but if the injector constant in the chip is wrong you can't fix it without re-programming the chip. I also wouldn't recommend that you not leave your car running in the garage for any reason since there is a very real possibility of carbon monoxide poisoning.

Neal

Furthermore if his car was running so badly ? how did it pass smog Harold? You have seen how difficult that can be if everything isn't on the money. As Neal & I have stated these concerns are much to do about nothing. I do disagree against you running the car in your garage. I would even encourage you to attach a hose to your tail pipe run it through the window & take some deep breaths LOL

 

[Drip Pan]

get a hold of me i will fix your BLM problem for yah since none of these dinosour guys aren't able to do it

22psi on alky and pump gas, 7.6@91mph with 1.63/60ft. New times Coming soon.

Dinosaur checking in. I wish those Scanmasters didn't display BLM as IMO too much information can lead to Analysis Paralysis. Gotta agree with Lou's Shakespearean reference about BLMs being much ado about nothing. Does the car start and drive fine? Do the O2 numbers look good at WOT? How much knock is the car picking picking up, if any? Does it pull hard at WOT? In my mind these are the questions newer owners might want to focus on.

Morgan
6.87 at 102.5 1/8th through a stock Buick (no Translator needed) MAF I replaced in 1998. It's kind of stupid that way.

 

[750H.P.V6]

Phil,

The best answer is that there isn't a perfect chip and no 2 combinations are the same. You can burn a chip with an injector constant that will give you perfect BLM's at 30psi fuel pressure, 35psi, 40 etc. The norm is 42 psi which is the pressure rating on the 237 regulator. The other thing is that closed loop function and power enrichment fuel are 2 different things. You need to maintain a 14.7 to 1 A/F ratio for normal driving and emissions and something richer than that once you go into P/E lets say between 11.5 and 12.5 to 1 for sake of argument. Power enrichment has 4 seperate tables in the chip which include P/E vs coolant temp,P/E vs TPS, P/E vs RPM, and P/E vs time. Fuel flow is dependent on the air flow of a given engine combo ie: more air+more fuel=more H.P. If the injector constant is correct and the P/E fuel flow is right for a given combo and boost level the no further adjustments should be needed. Unfortunately it's not a perfect world. Clear as mud eh?

Neal

Ok... again not trying to argue but just get an understanding...

So why an adjustable regulator? Why doesnt all chip burners burn a chip for a stock 233 regulator? And I know most chips lock bls at 128 @ WOT... then shouldnt there never be a problem with running rich or lean? If its locked wouldnt it automatically be perfect?... Or is it just a matter of what a particular car likes.?

 

[wiked87gn]

myself i like to keep my BLM's between 120 to 135 range at idle or cruise, usually when you have to low blm's or too high blm's the ecu is trying to tell you something and it is trying to compensate for something not running right it could be ethier vacumm or fuel system is not right, find it and fix it, just my opinion. .

wiked

 

[turbolou]

Reply

Phil,

The best answer is that there isn't a perfect chip and no 2 combinations are the same. You can burn a chip with an injector constant that will give you perfect BLM's at 30psi fuel pressure, 35psi, 40 etc. The norm is 42 psi which is the pressure rating on the 237 regulator. The other thing is that closed loop function and power enrichment fuel are 2 different things. You need to maintain a 14.7 to 1 A/F ratio for normal driving and emissions and something richer than that once you go into P/E lets say between 11.5 and 12.5 to 1 for sake of argument. Power enrichment has 4 seperate tables in the chip which include P/E vs coolant temp,P/E vs TPS, P/E vs RPM, and P/E vs time. Fuel flow is dependent on the air flow of a given engine combo ie: more air+more fuel=more H.P. If the injector constant is correct and the P/E fuel flow is right for a given combo and boost level the no further adjustments should be needed. Unfortunately it's not a perfect world. Clear as mud eh?

Neal

Thanks Neal! for explaining In more detail what I was trying to.The only thing that stopped me from entering college was high school. LOL