DRY DP a few questions.....
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From: Mass.
DRY DP a few questions..... What Injectors for a 300shot 408ci....
anybody have experience with efilive cos5 for tuning the dry hits....
this is gonna be a speed density tune, w/ a 2nd stage DP DRY KIT...
any pointers?????
anybody have experience with efilive cos5 for tuning the dry hits....
this is gonna be a speed density tune, w/ a 2nd stage DP DRY KIT...
any pointers?????
I'd think a set of 60lb/hr injectors would be a good fit, they should be good to ~900bhp at 80% duty cycle with a brake specific fuel consumption of 0.5.
Curious to hear about others experiences with COS5 because I also plan to use it. With just taking a glance at the software, the nitrous VE modifier only appears to go to 1.30, so it looks like that part of it can only add up to 30% fuel...curious to how you'd set up a 300 shot without changing other things.
Curious to hear about others experiences with COS5 because I also plan to use it. With just taking a glance at the software, the nitrous VE modifier only appears to go to 1.30, so it looks like that part of it can only add up to 30% fuel...curious to how you'd set up a 300 shot without changing other things.
COS 5 only to 1.30 which equals 11.31:1 a/f ratio? I run mine a little more rich for the added safety and only minimal lose in power.
60lb'ers, well depending on your overall hp sought, they would be a good starting point, as they can be tuned with stock pcm and still work well. bigger and you need to start looking at after market controllers. The exact math for inj sizing can be found in the wet vs dry thread.
A good pump and a return and reg at the rails is allmost mandatory at this level. A rear mounted pump with reg at the tank takes to long to see the need for more fuel, then same amount of extended time to send added fuel, not good at your level sought. i have mine at the rails and it has held great pressure upto a 285rwhp shot (still don't know the limit), and of course the Racetronics pump and hot wire. if this is not enough for your combo, then you can also add a BAP, which could also extend the range of the 60lb'ers through higher pressure while spraying.
I am currently working on stand alone for the dry hits; why, well no more mixing of the fuels. It will be just a flip of a switch to go to dedicated fuel system.
Robert
60lb'ers, well depending on your overall hp sought, they would be a good starting point, as they can be tuned with stock pcm and still work well. bigger and you need to start looking at after market controllers. The exact math for inj sizing can be found in the wet vs dry thread.
A good pump and a return and reg at the rails is allmost mandatory at this level. A rear mounted pump with reg at the tank takes to long to see the need for more fuel, then same amount of extended time to send added fuel, not good at your level sought. i have mine at the rails and it has held great pressure upto a 285rwhp shot (still don't know the limit), and of course the Racetronics pump and hot wire. if this is not enough for your combo, then you can also add a BAP, which could also extend the range of the 60lb'ers through higher pressure while spraying.
I am currently working on stand alone for the dry hits; why, well no more mixing of the fuels. It will be just a flip of a switch to go to dedicated fuel system.
Robert
Originally Posted by Hennytime
so in your opinion, the racetronix pump, hotwire and bap is enough, plus a rail mounted fpr and return line. too to tough
Robert
Originally Posted by Robert56
COS 5 only to 1.30 which equals 11.31:1 a/f ratio? I run mine a little more rich for the added safety and only minimal lose in power.
Robert
Robert
Originally Posted by efilive COS5
This value is multiplied with the values in the VE table, based on the state of an external switch or monitored relay. The switch or relay is connected to the PCM on Red-J2, pin 56.
For example, if the VE Table value is 3.000 Grams*Kelvin/kPa, and the value in this table was 1.00 then the final VE number will be 3.000
But if you entered a multiplier of 1.01 the value will be 3.000 Grams*Kelvin/kPa X 1.01 = 3.030 Grams*Kelvin/kPa.
For example, if the VE Table value is 3.000 Grams*Kelvin/kPa, and the value in this table was 1.00 then the final VE number will be 3.000
But if you entered a multiplier of 1.01 the value will be 3.000 Grams*Kelvin/kPa X 1.01 = 3.030 Grams*Kelvin/kPa.
For COS5 nitrous mode, I plan to tap a relay's coil into the dry nitrous noid, so whenever the noid fires, it will automatically ground the pin on the ECU, if I have issues with that I can always move the relay activation to whenever the nitrous switch in on. I plan to use it to pull timing and dial in the fuel a little better, I'll still be using the MAF as a starting point on the dry shot. Not really 100% sure how this all works, but I'll find out soon enough.
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Originally Posted by rosey
Not a 1.3EQ, but it is a VE table multiplier...here is the description in the software...
I was just running wet, but a leaking nitrous noid caused me to pull most of the system out until I can rebuild them. I am going to add a dry stage to use on its own and run a two stage dry/wet once I get my noids fixed.
For COS5 nitrous mode, I plan to tap a relay's coil into the dry nitrous noid, so whenever the noid fires, it will automatically ground the pin on the ECU, if I have issues with that I can always move the relay activation to whenever the nitrous switch in on. I plan to use it to pull timing and dial in the fuel a little better, I'll still be using the MAF as a starting point on the dry shot. Not really 100% sure how this all works, but I'll find out soon enough.
I was just running wet, but a leaking nitrous noid caused me to pull most of the system out until I can rebuild them. I am going to add a dry stage to use on its own and run a two stage dry/wet once I get my noids fixed.
For COS5 nitrous mode, I plan to tap a relay's coil into the dry nitrous noid, so whenever the noid fires, it will automatically ground the pin on the ECU, if I have issues with that I can always move the relay activation to whenever the nitrous switch in on. I plan to use it to pull timing and dial in the fuel a little better, I'll still be using the MAF as a starting point on the dry shot. Not really 100% sure how this all works, but I'll find out soon enough.
Here is a thread at the EFI Live forum concerning the VE Multiplier.
http://forum.efilive.com/showthread....ed=1#post54002
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Originally Posted by rosey
Not a 1.3EQ, but it is a VE table multiplier...here is the description in the software...
Stochimetric AFR / Power Enrichment Multiplier = Commanded A/F So:
14.7 / 1.30 = 11.30:1 A/F Ratio
If I am missing something, someone please correct me.
Beer, I read your other thread. Well I do know that in HP Tuner you can set-up a custom fuel curve using the PE Multiplier. With COS 5, are they saying that it won't work using the special n2o fueling table?
Robert
Originally Posted by Robert56
Beer, I read your other thread. Well I do know that in HP Tuner you can set-up a custom fuel curve using the PE Multiplier. With COS 5, are they saying that it won't work using the special n2o fueling table?
Robert
Robert
Originally Posted by Beer99C5
The COS 5 VE multiplier is for the nitrous tune only (toggle enabled). I am pretty satisfied with the NA Tune.
On your spikes, can you in EFI Live check the time with the time based parameter. I do this on HP Tuner and I can see exactly how long the lean spikes are, whether from activation, or after a shift with lifting throttle (6-speeds). If your less than than a second in time frame, don't worry about it. If ya can get rid of it, that's great, but I have one on every gear shift and you know how many passes I have made, and they are less than a second each. Not sure why you have an intial spike, the dry should take care of that, maybe change one nozzle to bigger jet and down size the other (which I have basically done on mine), this allows a more dense (cold) reading on the maf, and instant going rich, I mean micro seconds. I have Zero spike upon activation, and I mean none.
Robert
Robert
Last edited by Robert56; Sep 2, 2007 at 11:02 AM.
Ah, I see looks like I misunderstood how the table works. I was thinking it literally changed your VE table to modify actual AFR without changing the commanded AFR. Looks like it shouldn't be too much trouble to get the fueling right without touching any of the tables used in the n/a tune.
Beer, have you been successful with what you've done in COS5 so far?
Beer, have you been successful with what you've done in COS5 so far?
Originally Posted by rosey
Beer, have you been successful with what you've done in COS5 so far?
Threads for parts for the Grounding wire (PCM connector .50 cents) and how to at EFI Live Forum. Pretty much covers all the issues I had, as well as my 1999 Vette OS upgrade to 2002 OS.
Originally Posted by Beer99C5
I have only used the timing tables so far, and it works great (toggle activated). Howard set up my car w/ the H/C package, I am down for a fuel leak at the tank (I stripped out a couple of bolts at the pump cover messing with a racetronics pump), next test session I will test out the VE multiplier math for my current thread over there and tie everything together.
Threads for parts for the Grounding wire (PCM connector .50 cents) and how to at EFI Live Forum. Pretty much covers all the issues I had, as well as my 1999 Vette OS upgrade to 2002 OS.
Threads for parts for the Grounding wire (PCM connector .50 cents) and how to at EFI Live Forum. Pretty much covers all the issues I had, as well as my 1999 Vette OS upgrade to 2002 OS.