what would happen if i used a 2 bar map
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what would happen if i used a 2 bar map
and then scailed my stock fuel tabels acordingly i know that the resolution would suck and it would not be ideal but would it be beter than using a fmu this is for a TBI setup using the 747
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Re: what would happen if i used a 2 bar map
Originally posted by c4boom
and then scailed my stock fuel tabels acordingly i know that the resolution would suck and it would not be ideal but would it be beter than using a fmu this is for a TBI setup using the 747
and then scailed my stock fuel tabels acordingly i know that the resolution would suck and it would not be ideal but would it be beter than using a fmu this is for a TBI setup using the 747
It's been tried, and from what I have heard... bad results.
The long answer is, while you could rescale everything, there is more in the code (when under boost) than just a rescaled fuel table.
There are several adders that are not present in NA code.
A better option is swap to a 749 ECM, keep the TBI, set the bit in the code for TBI and use either $58 mask or Grumpy's source code based off $58. Grumpy's mask is labeled $60.
See the DIY Prom board for more info.
Bob
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Re: Re: what would happen if i used a 2 bar map
Originally posted by SATURN5
The short answer is no, it won't work... not worth doing.
It's been tried, and from what I have heard... bad results.
The long answer is, while you could rescale everything, there is more in the code (when under boost) than just a rescaled fuel table.
There are several adders that are not present in NA code.
A better option is swap to a 749 ECM, keep the TBI, set the bit in the code for TBI and use either $58 mask or Grumpy's source code based off $58. Grumpy's mask is labeled $60.
See the DIY Prom board for more info.
Bob
The short answer is no, it won't work... not worth doing.
It's been tried, and from what I have heard... bad results.
The long answer is, while you could rescale everything, there is more in the code (when under boost) than just a rescaled fuel table.
There are several adders that are not present in NA code.
A better option is swap to a 749 ECM, keep the TBI, set the bit in the code for TBI and use either $58 mask or Grumpy's source code based off $58. Grumpy's mask is labeled $60.
See the DIY Prom board for more info.
Bob
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Re: Re: what would happen if i used a 2 bar map
Originally posted by SATURN5
The short answer is no, it won't work... not worth doing.
It's been tried, and from what I have heard... bad results.
The long answer is, while you could rescale everything, there is more in the code (when under boost) than just a rescaled fuel table.
There are several adders that are not present in NA code.
A better option is swap to a 749 ECM, keep the TBI, set the bit in the code for TBI and use either $58 mask or Grumpy's source code based off $58. Grumpy's mask is labeled $60.
See the DIY Prom board for more info.
Bob
The short answer is no, it won't work... not worth doing.
It's been tried, and from what I have heard... bad results.
The long answer is, while you could rescale everything, there is more in the code (when under boost) than just a rescaled fuel table.
There are several adders that are not present in NA code.
A better option is swap to a 749 ECM, keep the TBI, set the bit in the code for TBI and use either $58 mask or Grumpy's source code based off $58. Grumpy's mask is labeled $60.
See the DIY Prom board for more info.
Bob
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Originally posted by 88 350 tpi formula
there really is no strait answer to what grumpy's $60 code is? it's just based on the $58. I have been trying to figure it out
what makes it differant from the $58b tunercat has?
there really is no strait answer to what grumpy's $60 code is? it's just based on the $58. I have been trying to figure it out
what makes it differant from the $58b tunercat has?
Commented source code is good karma.
Either is fine, however if you want to make code changes (patches), expand,extend fuel, timing tables, using $60 makes it sooo much easier than before. BW
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Originally posted by 83 Crossfire TA
Actually, it does work. That’s what the 165/808 guys are doing. I’ve burnt a few chips that work OK, and Joby’s friend with the turbocharged Camaro is running that setup. I was expecting resolution problems but I don’t have any evidence of it.
Actually, it does work. That’s what the 165/808 guys are doing. I’ve burnt a few chips that work OK, and Joby’s friend with the turbocharged Camaro is running that setup. I was expecting resolution problems but I don’t have any evidence of it.
A MAF setup with boost doesn't count. Its gonna read airflow til it maxes out the maf.
On the SD setups, you need a 2-baro bin to start with. I tried every trick imagineable with the '730. It's VERY inconsistant under boost.
-- Joe
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This is a 165, running some 808 stuff in it, a 5d bin, no maf, but a map sensor. The bin that we both started with was a 1bar, 305 bin (I believe that it was originally used in an aussi TPI police interceptor). I’ve scaled the map tables to work with both a GM 2 bar map and a Honda 1.75 bar map. I’ve also scaled the table in the .ecu to show 0-200 or 0-175Kpa depending on what map I was working with. It works fine (though I don’t think I have the KS working right, but I’ve broken my car again so I haven’t had enough time to experiment and check for sure). I think Joby is running it with a GM 2 bar (at least that’s what we were bouncing back and forth via email for a while)
Last edited by 83 Crossfire TA; 08-04-2004 at 12:27 AM.
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Yes, My friend with the Turbo Camaro is using a 2-bar MAP and the stock 165 ECM with 808 code.
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Originally posted by 83 Crossfire TA
This is a 165, running some 808 stuff in it, a 5d bin, no maf, but a map sensor. The bin that we both started with was a 1bar, 305 bin (I believe that it was originally used in an aussi TPI police interceptor). I’ve scaled the map tables to work with both a GM 2 bar map and a Honda 1.75 bar map. I’ve also scaled the table in the .ecu to show 0-200 or 0-175Kpa depending on what map I was working with. It works fine (though I don’t think I have the KS working right, but I’ve broken my car again so I haven’t had enough time to experiment and check for sure). I think Joby is running it with a GM 2 bar (at least that’s what we were bouncing back and forth via email for a while)
This is a 165, running some 808 stuff in it, a 5d bin, no maf, but a map sensor. The bin that we both started with was a 1bar, 305 bin (I believe that it was originally used in an aussi TPI police interceptor). I’ve scaled the map tables to work with both a GM 2 bar map and a Honda 1.75 bar map. I’ve also scaled the table in the .ecu to show 0-200 or 0-175Kpa depending on what map I was working with. It works fine (though I don’t think I have the KS working right, but I’ve broken my car again so I haven’t had enough time to experiment and check for sure). I think Joby is running it with a GM 2 bar (at least that’s what we were bouncing back and forth via email for a while)
I take that your just adding "X" fuel at "X" MAP @ "X" RPM for fueling, or is there a seperate fuel adder table? BW
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this is geting interesting i dont understand how alot of it works ( in that alone it makes it scary for me to try) but i am hoping to lern
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Originally posted by SATURN5
Interesting.. I thought there was a blown Holden mask (not $5D). I knew about the MAF to MAP code. Must have cornfused it..
I take that your just adding "X" fuel at "X" MAP @ "X" RPM for fueling, or is there a seperate fuel adder table? BW
Interesting.. I thought there was a blown Holden mask (not $5D). I knew about the MAF to MAP code. Must have cornfused it..
I take that your just adding "X" fuel at "X" MAP @ "X" RPM for fueling, or is there a seperate fuel adder table? BW
-- Joe
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Originally posted by SATURN5
Interesting.. I thought there was a blown Holden mask (not $5D). I knew about the MAF to MAP code. Must have cornfused it..
Interesting.. I thought there was a blown Holden mask (not $5D). I knew about the MAF to MAP code. Must have cornfused it..
I take that your just adding "X" fuel at "X" MAP @ "X" RPM for fueling, or is there a seperate fuel adder table? BW
Originally posted by anesthes
The problem is the million constants and loops that are based on xxx amount of map, and so on. But its not worth arguing over. If they got it running well enough to make 'em happy, good for them.
The problem is the million constants and loops that are based on xxx amount of map, and so on. But its not worth arguing over. If they got it running well enough to make 'em happy, good for them.
I’ve tooled around with my car with the 2 bar and 1.75 bar, and compared it NA to NA with the original MAF setup. So far it’s running the same times at the track, I’m getting slightly better gas mileage (comparing it to the MAF setup with highway mode enabled), and much better idle/part throttle. I was never able to get that quite right with the MAF, with the stock injectors/stock chip it was always RICH where it rand the fastest, with 42pph injectors and assorted chips I was able to get it to run with roughly the right mixture but not really steady, always felt like it was right on the verge of dieing but never did (OTOH, change the fuel pressure a little and it wouldn’t run). The butt-o-meter tells me that it’s significantly more responsive to throttle input then it was with the maf (the axles with hammered splines that I just pulled out of it and refuse to reinstall seem to agree)
For the most part with the exception of the TCC stuff it runs better with this setup. I’d like to know how people have hacked/changed table sized in other bins/masks and double the map table resolution to run with a 3 bar map (I suspect that it would run fine like it is, but it’s only 9 columns wide now, I expected the resolution to be too low already).
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