You have no reason to applogize, the thread was not ruined by you and you had a legit question that needed to be answered, not critisized (sp).
Let me know when you would like to give it a try,
thanks.
I sent a pm about getting this tune but have had no reply about it.
__________________
AGP hot and cold ic pipes, Needswings v6 dp, mccord plate, Auto meter EGT and wide band, Magnaflow ext,BFMIC,AGP dog bones and trans mount, AGP wast gate,S1, WOT box, DSP.
i've been driving around with the wga arm off...
any issues i should worry about ?
Nope, just the super rich running condition when you go past a certain voltage with the TPS.
Get a small adjustment and you would see even better gains from pulling the WGA off.
Quote: Originally Posted by letxen3
so with the wga arm off you get no boost at all right?
You will get some, but not enough to worry about. Bigger problem is all the gas your going to waste now because when you do go WOT or more than 77% throttle (deppending on the tune) you car will shoot for your target AFR's (10's most the time). That is just raw gas getting dumped out the tail pipe that could be getting used for MPG use.
Quote: Originally Posted by 4drsportscar
I am going to give this an unobjective try/test and will post up the #'s when it's done. I am having fun using the DSP and learning what it can do. I have a friend that got a tuner for a truck that came with 3 tunes on it. ( fuel, towing, and performance) no reason why we can't do the same. - the towing tune lol
We can build any tune you want with the DSP, hell if you wanted a towning tune I am sure we could get something built for it .
I should mention guys, that if you have an aged o2 sensor, get it replaced. They should be replaced every 60k miles if not sooner.
I replaced my o2 sensor upstream one, and I saw no different in MPG, and nothing on my scan gauge and nothing different in my AFR gauge, seems to me unless it needs replacing due to a engine light you don’t need to replace it.
My cruising AFR’s stayed the same. 14.2 etc. idle same 14.8 to 15.2.
seems to me unless it needs replacing due to a engine light you don’t need to replace it.
Although this was not the case in your situation this is Not good advice.
Its a known fact that as an O2 sensor wears, it can become slow to respond to A/F changes. I've replaced a few old sensors that didn't set a CEL but when scanned, just hung around stoich volts of ~.45v.
The faster the O2 can respond to A/F changes the better and will improve MPG. Remmember the PCM is programmed to know the time delay it will take for its fuel changes to hit the O2 sensor. SO if your O2 is gettting sluggish the PCM isn't making A/F changes based on good info.
On cars with 70k-80K I change the O2 sensor regardless if there any indication of a fault. Right now I have a Innovate LC-1 running inplace of the stock O2 sesnor on the wife's minivan. Its leaned out and reprogrammed to report an A/F of 15.5:1 as "stoic"
__________________
"Just because someone goes fast doesn't mean you should do whatever you think they did.
This path assumes they knew what they were doing, which isn't necessarily the case"..........RB Racing
I got the tune from PTP last week and had time to put it in my car today. it runs great, but I was told to keep it under 5 lbs. of boost. I hope I never forget what tune Im running, cause it will still boost wit no problem and Its not a total dog, like I thought it was going to be. It will keep up with traffic just fine! I hope to have the mpg#'s with in a week or so. I only drive around town no hwy driving. so far Im happy with it.
With CMR software, do you have the ability to change the parameters the PCM uses to shut off the injectors while coasting?
Yes there are settings for that. Its fairly aggressive as it is though. imo not a lot of mpg gain found in changing the DFCO(decel fuel cut off) set points or duration.
Yes there are settings for that. Its fairly aggressive as it is though. imo not a lot of mpg gain found in changing the DFCO(decel fuel cut off) set points or duration.
So if you shut off one or two injectors at coasting speed you wouldn't see much gains? Can you explain why that would be?
Obviously the gains wouldnt be the same as going from 8 to 4 but I would have to think percentage wise it should be similiar.
I didn't even know this was available for the SRT4. It would be a little scary in a turbo charged application.
__________________
.
.
.
Quote: Originally Posted by srt4moster
he is doing good, i make sure to play with him everytime im there.
So if you shut off one or two injectors at coasting speed you wouldn't see much gains? Can you explain why that would be?
Obviously the gains wouldnt be the same as going from 8 to 4 but I would have to think percentage wise it should be similiar.
I didn't even know this was available for the SRT4. It would be a little scary in a turbo charged application.
All 4 injectors shut off while coasting when ever the TPS is closed and MPH is over ~30mph. The injectors stay completly off until the RPMs hit about 1600rpm. If ever the TPS is touched before 1600rpm, the injectors instantly turn back on.
Since its already an active feature on every SRT(and pretty much every EFI car ever build), and it turns off the injectors much more aggressively than any automatic trans car, I don't see much MPG gain by making it turn off the injectors sooner or keep them off longer.
To keep DFCO engaged longer:
1)Don't put the car in neutral when slowing down.*
2)Leave the clutch engaged when slowing down.*
*until RPM are under 1600rpm
Last edited by duster360 : 11-04-2009 at 02:07 PM.
That's what I figured. Is it only TPS, mph and rpm that are used? The only reason I ask is because I never see it in third gear, but then again I drive like an old lady so I don't usually coast much in third gear above 30.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
.
Linear Mode
