Quote:
Originally Posted by wstar
Even if you have problems with filter oil coating the MAFs over time, a solution for that is to clean the MAFs more often, which you should be doing anyways. It takes like 10 minutes to pop them out and hose them down with MAF cleaner.
(on another earlier point: the GTM/UpRev MAFs give more range, but yes they still need to be tuned, just like stock ones. Step one is to map out both MAFs and adjust the MAF tables to get them accurate before you tune the rest of the engine using MAF data. No two MAFs leave the factory reading exactly the same...).
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Here is the link to the K&N filters response : The real or imagined controversy is because of the potential for the oil to reach the sensors.
In my case the sensors and the filters were brand new ...
I wasn't there for the install so I can't comment if the filters were overly drenched or not.
K&N Response to Mass Air Flow Sensor Concerns
I can only assume that my brand new UpRev MAF's were calibrated as you've described prior to the new tune.
Ready for a Laff ???
Here is the short version of arranging for the tune after the car was ready.
As you will see, there were many hands stirring the pot and fingers pointing every which way after the motor blew.
The MAF's and K&N filters were included in the list of suspects...
Sit back and enjoy the SitComedy of Errors
.....
Here is the list of characters:
Tuner A was my guy doing the wrenching - he's the one on my side.
Tuner B, located in Central NJ about an hour away, was one of Tuner A's buddies that had the UpRev license and would be able to do the tune with Tuner A present...since Tuner A could not access the ECU to do the tune himself.
Tuner C was an heretofore unknown Tuner located across the border in NYC; but he was familiar with Nissans and was a licensed UpRev dealer.
Now on to the day it was supposed to be tuned by Tuner A (my guy):
Tuner A couldn't unlock the Stillen cable to install a basic tune to start the car.
Called Stillen and they didn't have a tune ready for the 9 lb pulley...and weren't able to provide us with a work around.
So we didn't get to start the car.
Made arrangements with Tuner B ... he could squeeze us in the next week...and Tuner A (my guy) and I would do the tune.
The car was to be flat bedded down there ahead of time.
Next week came and went ... Tuner B could not do the tune due to a death in the family.
More time elapsed waiting for Tuner B's situation to ease ...
Tuner B did not respond to a number of attempts to contact him.
Searched around and found Tuner C located about 40 miles away over the stateline border into NYC.
Tuner C agreed to Dyno time and would unlock the tune.
Tuner A (my guy) was to be present ... I was to drive him there and wait while while he did the tune.
Flat bedded the car there the day before the agreed upon Dyno day.
Tuner C called and rescheduled the tune for another day.
The car sat at Tuner C's facility for another week or so.
Finally got Tuner C to reschedule ...
We (Tuner A, my guy) and I arrived only to find that Tuner C had already done the tune without our being present.
Tuner C informed us that the car had some starting issues due to the 1000 injectors.
The car was off the dyno and out in the parking lot.
I got hit with an additional $1200 for the tune and $375 for the flat bed.
Tuner A (my guy) drove the car back to his shop.
More fun ...
Tuner A (my guy) held the car for another 3 or 4 weeks testing it and trying to contact Tuner C to get it back on the Dyno to fix the start issue, which he (Tuner A, my guy) had determined not to be the injectors but that the tune needed to be tweaked.
Tuner C did not return any calls...
In the meantime Tuner A (my guy) also discovered that the car would sometimes stall by itself and then again upon braking or going around a quick turn...which he (Tuner A) didn't really tell me about.
The plot thickens ... after 9 months of planning and building, I became impatient with all of the delays and excuses and took the car for a shake down cruise ... it was peppier than before and I was assured that it would be OK to drive and even do a few passes with it at the track the next day.
The 'minor' problems could and would be resolved once we had another dyno session.
1/4 mile later and I'm flat bedding the car back to the shop ... this time it was a $575 bill for the tow.
The car is now sitting in my driveway under a car cover, filled with boxes of it's own innards, parts, pieces, and with it's nose pointed to the air without it's motor.
Are you Dizzy yet ???
In another ironic twist of fate ... Tuner A (my guy) just purchased a flat bed truck of his own and I was to be his first customer ...
The car was sitting back at his shop for about a month taking up space and he needed the room so he asked me if I would be OK with having him 'store' My car in My driveway until the motor got back from rebuild...
Sounded reasonable ... what could possibly go wrong ???
Welllll ... after backing the truck in to my driveway, the cable let go when they were winching it off the bed ...
The car rolled off the back of the truck and headed straight towards my garage doors : the exhaust tips dug 2 trenches in my driveway : the driver/operator did a flying superman leap in thru the drivers window to pull the emergency brake just in time to stop short of plowing into the garage ...
Oh, I forgot to mention, when we got back to the shop from Dyno Day at Tuner C's, I got rear ended in my G37 while stopped at a traffic light about 2 blocks from Tuner A (my guy's) shop.
Only about $600 damage on that one ...
Since I need to replace the MAF's and filters anyway, and I'm shooting for more power (whynot), I thought I'd ask about the GTM's
Thanks :-) hope you enjoyed this Tale of Woes !!! (I know it was a long read for a short version - but it was even longer in real time as it was happening) !!!
Ya can't make up stuff like this...but it is kind of funny in a painful kind of way.
Tuner C still hasn't returned any phone calls ... and is rumored to have moved to Florida.
ps I should have purchased my own UpRev software and cable from GTM in the first place - who'da thunk ??? - aaarrrggghhh