Running Lean...don't know why
07-28-2006, 03:42 PM
#16
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chapstic951,
The wideband is you're car's most important diagnostic device, at the moment, you need an AFR reading, so a dyno would be quicker to diagnose the AFR, unless the wideband is alright with the budget, go get one, even one stock cars, wideband O2 sensors are a great way to keep an eye on the AFR.
BTW, if you have a MBC, which you do, you don't need to replace the stock KLR chip, as long as the cv is bypassed and disconnected.
The wideband is you're car's most important diagnostic device, at the moment, you need an AFR reading, so a dyno would be quicker to diagnose the AFR, unless the wideband is alright with the budget, go get one, even one stock cars, wideband O2 sensors are a great way to keep an eye on the AFR.
BTW, if you have a MBC, which you do, you don't need to replace the stock KLR chip, as long as the cv is bypassed and disconnected.
07-30-2006, 10:15 AM
#18
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Originally Posted by jy951
I use MAFterburner (piggy back system from LR) in conjunction with the LR (Lindsey Racing) fuel rail, AFPR, and an AEM wideband 02 sensor. You don't need the fuel rail but I swear by the other three - because my 951 is modded (bigger turbo, IC, etc.). Like Chris White and Hally said 'BUY THE WIDEBAND 02 SENSOR!', it's the best investment for a modded 951 (or any forced induction car). Make sure to buy a wideband 02 that has data logging capability - so you can see where u r running lean - MAFterburner also has data looging. You can use the AFPR too increase or decrease fuel pressure (to richen or lean out your tune - the piggyback gives u more granularity to richen or lean out your tune above and beyond the AFPR) The combination of the three works great for me when tuning.
07-30-2006, 11:57 AM
#19
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The wideband goes on the test pipe, before the CAT
If you have a straight flowing exhaust system, you can mount it before the rear muffler.
If you have a straight flowing exhaust system, you can mount it before the rear muffler.
07-30-2006, 04:03 PM
#21
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So hosrom, when I install the WBO2 sensor, I will keep the one that sends the signal to the KLR? Yes? I am running a stock exhaust and don't plan on putting in a straight pipe anytime soon.
Porschefile, I am sitting at about 135k miles. Unfortunatly I do not have any prior records besides what I have done so I assume it is the original one. I got the car at 123k. I did the pressure test to see if the fuel pump or pre and post filters per Clarks garage. My pressure numbers look good, exept the leak down. Running pressures are right where they should be so I don't think the pump is the issue here.
....keep the thoughts coming.
Porschefile, I am sitting at about 135k miles. Unfortunatly I do not have any prior records besides what I have done so I assume it is the original one. I got the car at 123k. I did the pressure test to see if the fuel pump or pre and post filters per Clarks garage. My pressure numbers look good, exept the leak down. Running pressures are right where they should be so I don't think the pump is the issue here.
....keep the thoughts coming.
07-30-2006, 04:29 PM
#22
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chapstic951: Wideband O2 sensors have two outputs, a 0-5v(known as the wideband output) and a 0-1v (narrowband). The 0-5v is for reading the more accurate AFR (from 9.0:1-20.0:1 depending on models).
I only heard that you can disconnect the factory 02 sensor, and use the wideband O2 sensor's narrowband output (0-1v) to the KLR. I will try it, but my car has been at the ac shop for 2 weeks now, waiting for parts to come in. I cannot confirm anyone did this, to the 951 at least.
Since you have the stock exhaust, weld the bung onto the test pipe, BEFORE the CAT.
I only heard that you can disconnect the factory 02 sensor, and use the wideband O2 sensor's narrowband output (0-1v) to the KLR. I will try it, but my car has been at the ac shop for 2 weeks now, waiting for parts to come in. I cannot confirm anyone did this, to the 951 at least.
Since you have the stock exhaust, weld the bung onto the test pipe, BEFORE the CAT.
07-31-2006, 02:21 PM
#23
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I never said Porsche's were a "cheap" toy, but I just called the local shop and they are looking at $155 for a hp and a/f dyno pull. I plan on getting a WBO2 (and AFPR) within the next week or two, installed and see the results.
Anyone have a good reference site on how to make heads or tails of the A/F gauge output?
Anyone have a good reference site on how to make heads or tails of the A/F gauge output?
07-31-2006, 02:27 PM
#24
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Originally Posted by chapstic951
I never said Porsche's were a "cheap" toy, but I just called the local shop and they are looking at $155 for a hp and a/f dyno pull. I plan on getting a WBO2 (and AFPR) within the next week or two, installed and see the results.
Anyone have a good reference site on how to make heads or tails of the A/F gauge output?
Anyone have a good reference site on how to make heads or tails of the A/F gauge output?
WOW!!! That is WAYYYYY expensive. Unless that includes them tuning it for you.
Most shops are $20-50 per pull; denpending on a/f hook up or not.
Got a shop here that does 35$ for 2 pulls with a/f.
But in the long run better do go wideband as others in here have said. Zeitronix seems to be the best for the cost.
07-31-2006, 02:31 PM
#25
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The reason being (I am guessint) is that they are a $100/hr shop and they would have to pull a mechanic to do the pull. That does not include any tuning. That is another $105/hr.
Anyone out there have suggestions to WOB2's (good, bad and ugly)?
Anyone out there have suggestions to WOB2's (good, bad and ugly)?
08-10-2006, 09:52 PM
#26
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Well I installed the AFPR the other week and it feels much better. However the narrow O2 sensor is still giving me odd readings. I will be getting the Zeitronix WBO2 sensor by the end of the month so we will see what that tells me.
Now on to chapter 2, vaccum leaks. I will get another thread going on that one. Thank you for your help.
BTW, for my 30th bday, my wife is getting me a Vitesse MAF and piggyback...shhhh, it's a secrect. I have to wait until Nov before I find out.
Now on to chapter 2, vaccum leaks. I will get another thread going on that one. Thank you for your help.
BTW, for my 30th bday, my wife is getting me a Vitesse MAF and piggyback...shhhh, it's a secrect. I have to wait until Nov before I find out.
08-11-2006, 05:42 AM
#28
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Originally Posted by HIGHBOOST
Man, I only paid 40bux. for 4 pulls and AFR hook up
Local dynojet shop charged $110-$135 w/AFR read out for every hour, they also have a 160kpr fan and the place is inside with ac
Every other dyno shop charge well over $170, when i asked them for an AFR hook up, they said "why do you need an air/fuel ratio read out? doesn't power/torque matter more?".
I walked away, shocked.......since trhose shops are owned and run by.....let's just say VIP's here.
Anyways, chapstic951, pull the plugs and see what you are getting, to get a general idea of how things are. If you find a spark plug white, i'd be concerened and i would not suggest driving the car till you get the AFR adjusted.
08-12-2006, 02:57 AM
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Ha, yea he gave us an extra pull. It was this awesome shop in a neighboring city that builds NA civics for prof. drag racing. They were saying this new RSX they built cost 150K+
944, adjustable, afr, clarksgarage, datalogging, disconnected, fuel, lean, o2, porsche, pressure, regulators, remotelty, running, stock, turbo
