Undrivable after installing NA-Tune
Rainman
Rennlist Member
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Joined: Jan 2007
Posts: 45,844
Likes: 784
From: Nashville, TN
I remembered something this morning...
The MAF sensor needs to be "clocked" a certain way. Because there is a 135* bend pulling air through the MAF the air on the "inside" of the curve is moving at a different speed as the "outside".
I remember it making a nice difference when I flipped the sensor around as it could read the air better.
which way is your sensor "pointing"?
The MAF sensor needs to be "clocked" a certain way. Because there is a 135* bend pulling air through the MAF the air on the "inside" of the curve is moving at a different speed as the "outside".
I remember it making a nice difference when I flipped the sensor around as it could read the air better.
which way is your sensor "pointing"?
Thread Starter
Instructor
Joined: Oct 2014
Posts: 189
Likes: 0
From: North Jersey
I remembered something this morning...
The MAF sensor needs to be "clocked" a certain way. Because there is a 135* bend pulling air through the MAF the air on the "inside" of the curve is moving at a different speed as the "outside".
I remember it making a nice difference when I flipped the sensor around as it could read the air better.
which way is your sensor "pointing"?
The MAF sensor needs to be "clocked" a certain way. Because there is a 135* bend pulling air through the MAF the air on the "inside" of the curve is moving at a different speed as the "outside".
I remember it making a nice difference when I flipped the sensor around as it could read the air better.
which way is your sensor "pointing"?
Instructor
Joined: Jun 2015
Posts: 165
Likes: 1
From: Tucson
Good luck, I have 2 944s and could not get 2 kits running on either cars, huge back and forth with Lindsey racing and I'm out 700.00. They kept saying it was my cars, which both run fine with a miller maf kit and the stock afm set-up, total BS.
Last edited by AZ520; Jan 14, 2017 at 03:28 AM. Reason: who cares
Rainman
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From: Nashville, TN
Well..you'd think the kits would all be made the same, right?
Having been a 944 wrench and seen a few million cars over the years I would tend to agree that its individual cars conditions that may be the difference.
ALthough I suppose being a newish product still it's got bugs..
Having been a 944 wrench and seen a few million cars over the years I would tend to agree that its individual cars conditions that may be the difference.
ALthough I suppose being a newish product still it's got bugs..
Thread Starter
Instructor
Joined: Oct 2014
Posts: 189
Likes: 0
From: North Jersey
I'm not ready to throw in the towel and blame the kit. I have enough reason to believe it's the car, just have to figure out why.
It'd be nice if Rogue was still active here.
Instructor
Joined: Jun 2015
Posts: 165
Likes: 1
From: Tucson
I had a wideband on one car and just a tip of the throttle ran way too rich, 9-11 popping, cutting out, backfiring, plugs fouling, too rich. Without the kit installed both cars run fine, what else you want to know, its simple. It was a huge ordeal an I am really tied of the whole mess, just a heads up, I had a bad experience and good luck.
Thread Starter
Instructor
Joined: Oct 2014
Posts: 189
Likes: 0
From: North Jersey
10inHg @ idle. Looking like a vacuum leak. Bought all the crap to make the cap to pressurize the intake. Guess the smoke method isn't reliable.
Confusing though, popping the dipstick out makes the idle raise, which was a factor in me being so confident that it isn't a vacuum leak. Should be along the FPR lines then.
Once there's a good plug and play that isn't a couple grand I'm in. I'm not interested in having the car down for months (again).
Confusing though, popping the dipstick out makes the idle raise, which was a factor in me being so confident that it isn't a vacuum leak. Should be along the FPR lines then.
Once there's a good plug and play that isn't a couple grand I'm in. I'm not interested in having the car down for months (again).
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Burning Brakes
Joined: Dec 2015
Posts: 1,033
Likes: 6
I was lucky as we have a Top 944 Tuning Guru here in the UK, who advised the
30 year old Stock Bosch ECU, AFM & ignition could all be tuned.
Over 6 hours whilst the car was in Motion Rolling on the Rollers...Not only was +26bhp & 30Ft Lbs torque found, but both figures were made higher in the lower Rev ranges.
The car starts from hot and cold, Idles and runs perfect.
R
http://924srr27l.co.uk/wp-content/up...924srr27L-.pdf
Rainman
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Joined: Jan 2007
Posts: 45,844
Likes: 784
From: Nashville, TN
May as well just call him a d-bag lol
Addict
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Joined: Mar 2002
Posts: 6,911
Likes: 215
From: Boulder, CO
I guess I do not know the stereotypical implications of vaping but OP may just not have gotten results from a smoke test... because he did not use smoke. Water vapor might not make the trip through the system intact so you can see it coming out the leak the way smoke does (or I think the way mineral oil vapor does).
-J.
-J.
Race Car
Joined: Mar 2012
Posts: 3,602
Likes: 13
From: Austin TX, drinking beer in the garage
A day spent Live mapping (N/A & Turbo) can be cost effective especially like me if you change the Cam, but finding people that know how to do this is the difficulty!
I was lucky as we have a Top 944 Tuning Guru here in the UK, who advised the
30 year old Stock Bosch ECU, AFM & ignition could all be tuned.
Over 6 hours whilst the car was in Motion Rolling on the Rollers...Not only was +26bhp & 30Ft Lbs torque found, but both figures were made higher in the lower Rev ranges.
The car starts from hot and cold, Idles and runs perfect.
http://924srr27l.co.uk/wp-content/up...924srr27L-.pdf
I was lucky as we have a Top 944 Tuning Guru here in the UK, who advised the
30 year old Stock Bosch ECU, AFM & ignition could all be tuned.
Over 6 hours whilst the car was in Motion Rolling on the Rollers...Not only was +26bhp & 30Ft Lbs torque found, but both figures were made higher in the lower Rev ranges.
The car starts from hot and cold, Idles and runs perfect.
http://924srr27l.co.uk/wp-content/up...924srr27L-.pdf
VEMS is a nice bit of kit for the price. nothing bad to say about it.
A microsquirt is cheaper and "better" in that it doesnt use the crappy factory crank pickups and lets you delete the distributor and go COP ignition. No reason your car would be down for more than a week at most to install a micro, I've literally spelled out every possible facet in a 10+ page guide with pictures and posted free tunes for anyone to download and run.
Race Car
Joined: Nov 2012
Posts: 4,779
Likes: 74
From: Houston TX
I'd add that you CAN use the factory sensors, but you know what's cool? Not having to deal with gapping them blindly, not having to evolve tiny Trump hands to access them, having 1 cheap sensor versus 2 that are Bosch parts, having less of a reason to work over the holes in the bellhousing, and being able to pull the bellhousing without wrestling with them. With that said nothing is really wrong with the stock pickups, they're just a product of the most economical/efficient solution for Porsche.
VEMS can also do all the same tricks as MS. But I really don't think MS is that much work...it seems intimidating, but you really shouldn't be playing with tunes and aftermarket ECUs if wiring up 10-15 inputs/outputs is out of bounds.
Roger's setup is the product of severe dedication and stubbornness, it turned out great. The cam without a doubt accounts for a good chunk of those gains...and the tuning wasn't left untouched as many people with aftermarket cams seem to think is fine.
VEMS can also do all the same tricks as MS. But I really don't think MS is that much work...it seems intimidating, but you really shouldn't be playing with tunes and aftermarket ECUs if wiring up 10-15 inputs/outputs is out of bounds.
Roger's setup is the product of severe dedication and stubbornness, it turned out great. The cam without a doubt accounts for a good chunk of those gains...and the tuning wasn't left untouched as many people with aftermarket cams seem to think is fine.
Burning Brakes
Joined: Dec 2015
Posts: 1,033
Likes: 6
There is honestly nothing impressive about what your guy did. 9/10 chance he used TunerPro RT or something extremely similar...no black voodoo magic in live tuning the DME. You are still polishing a turd and objectively would have gotten better results with a better ECU...but I'm not interested in getting into that argument with you again.
.
.
Oh !
You've no idea what he does and how he does it, otherwise you too could be well respected, successful and in high demand tuning engines, as opposed to handing out jibes with your favourite insulting word "turd".
There's plenty of people on here and worldwide Doug that would not say no to an increase in N/A Engine power with +40bhp from factory figures.
It's Impressive and you are clearly being rude.
I look forward to hearing the outcome if the OP can get this MAF issue found and the car running correctly, and what any differences there may be? and a power figure would also be interesting should he dyno the car.
R