What K or correction percentage do you have for fueling? Give injector and MAF combo.
I'm at AE8B with 460cc and a Z32. Car not running well though, awaiting wideband.
What is your K?
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Re: What is your K? (Edub1)
Might want to post what you're tuning with...I don't have a "K" reading on my SAFCII...lol.
You'll get more replies I think. There's a new thread I'd like you to look at Edub, about the tuning options. We could use your opinions in there...
WD
You'll get more replies I think. There's a new thread I'd like you to look at Edub, about the tuning options. We could use your opinions in there...
WD
Re: What is your K? (WDRacing)
I'll check it out. What % of crrection do you have? What injector AMF combo?
He's using a chipped ECU.
Edub - you should be able to calculate a pretty close estimate of the replacement K value by figuring the difference in injector sizes.
Additionally, don't forget to adjust for the new injector latency (void blast off time) on the bigger injectors. It will likely be a little higher lag time.
Edub - you should be able to calculate a pretty close estimate of the replacement K value by figuring the difference in injector sizes.
Additionally, don't forget to adjust for the new injector latency (void blast off time) on the bigger injectors. It will likely be a little higher lag time.
Re: (KATwo40)
The Z32 MAF is complicating things a bit. The last tune I tried was stock with only VQ changed. Seemed to run and idle ok untill I reved it and let it go back to idle. Then it stalls. I think I need to change the ttpmin and perhaps clean the MAF. Is carb cleaner good?
I was under the impression nobody was messing with the latency. Anyway, the car was running fine with the 460s when stock.
I was under the impression nobody was messing with the latency. Anyway, the car was running fine with the 460s when stock.
Re: (WDRacing)
They are tuning their own ECU's with a program called rom editor. They remove the stock tuned chip from the ECU then sodier in the socket that allows them to install a new chip and remove it for another one if needed.WDRacing wrote:Are you guys using the Bikirom tune? I'm in the dark here.
WD
All the terms they are using (K value, VQ settings TP scale ect...) all have to do with injector sizes, types of maf's ect...
Using this method tuning allows them to get a tune thats dead on for their setup. They can adjust timing/fueling for any given rpm. This is even better than the JWT ecu tunes... because they made for their exact setup by them.
If you want more info on the self ECU tuning go the this website and read up.
http://www.eccs.hybridka.com
Re: (KATwo40)
I just used picked the Z32 from the drop down menu in Romedit. Is this bad?
My 460cc NA tunes with stock MAF had the TTPmin lowered .58. I noticed Gabe didn't change them for the Z32 MAF tunes so I didn't. TTPmin is a default minimum injector pulse width. Perhaps it works independant of your MAF and K and by not changing them it messes up idle? I'm going to try the lower settings when I get my down pipe back on.
I did notice the car reved (didn't drive it) much smoother with the stock K value. Every other tune I tried hesitated and backfired. Including the one Wild Maxx is using.
My 460cc NA tunes with stock MAF had the TTPmin lowered .58. I noticed Gabe didn't change them for the Z32 MAF tunes so I didn't. TTPmin is a default minimum injector pulse width. Perhaps it works independant of your MAF and K and by not changing them it messes up idle? I'm going to try the lower settings when I get my down pipe back on.
I did notice the car reved (didn't drive it) much smoother with the stock K value. Every other tune I tried hesitated and backfired. Including the one Wild Maxx is using.
Re: (NateDogg)
550cc to 460cc should give 27600 dec. Stock is 24608. I'll give it a try. I'm going to take a look at yuour tune also. How's the A/F in heavy load?
I just had a look. Your values are different but you have a DE. I don't know how it all translates. Your TTP min & max is way lower though.
Modified by Edub1 at 9:46 PM 11/26/2006
I just had a look. Your values are different but you have a DE. I don't know how it all translates. Your TTP min & max is way lower though.
Modified by Edub1 at 9:46 PM 11/26/2006
OK, i was doing a little reading. I'm betting that ttpmin needs to be reduced for injectors independant of K.
I changed ttpmin and the first few ttpmax cells. I think this is because under heavy deceleration the ECU can't go by it's standard formula and just says **** it, drop to this fixed pulse to keep the engine running.
I also bet the decel setting on the SAFC feeds a set voltage to trick the ECU into staying out of **** it mode. Perhaps this is why so many people stall when coming off the gas real quick, they drop to a ttpmin that floods the motor.
I changed ttpmin and the first few ttpmax cells. I think this is because under heavy deceleration the ECU can't go by it's standard formula and just says **** it, drop to this fixed pulse to keep the engine running.
I also bet the decel setting on the SAFC feeds a set voltage to trick the ECU into staying out of **** it mode. Perhaps this is why so many people stall when coming off the gas real quick, they drop to a ttpmin that floods the motor.