Vitesse MAF kit
07-03-2007, 05:12 PM
#61
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The Profec manual doesn't give a good explanation of the gain control, it basically says turn it up until boost is steady, but not so high that it fluctuates. I'm really just concerned about whether or not my WG is staying closed at higher RPM's. Nize, what kind of EBC are you running that controls the dual solenoids?
07-03-2007, 05:14 PM
#62
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Originally Posted by Rob
Rogue, I'm guessing your datalog is from a MAP sensor (absolute?) if so at your altitude you probably have to build a couple lbs of boost just to get up to sea level atmospheric pressure. What pressure does your datalog/sensor show powered up with the engine off?
I will try it in Dual-Port mode, and see if there is any difference...
To the original poster, sorry to step on your thread. I totally believe about anything is better then the factory VAF.
Rogue
07-03-2007, 06:14 PM
#63
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Originally Posted by kevincnc
The Profec manual doesn't give a good explanation of the gain control, it basically says turn it up until boost is steady, but not so high that it fluctuates. I'm really just concerned about whether or not my WG is staying closed at higher RPM's. Nize, what kind of EBC are you running that controls the dual solenoids?
https://rennlist.com/forums/944-turbo-and-turbo-s-forum/332231-standalone-ems.html
07-03-2007, 06:19 PM
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Originally Posted by Jake951
Is there anybody who has gotten a K26/8 to hold full boost to redline using the WG in single-port mode?
the reason is simple; backpressure is not the same at different rpm's even if boost remains the same.
07-04-2007, 07:37 AM
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Originally Posted by reno928s
Rogue_Ant, it's ok, It doesn't bother me. The more things we cover the better. Thanks
good tech is always a rminder of what this board is here to accomplish for everyone.
07-04-2007, 11:31 AM
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If anyone is looking for a like new Vitesse MAF kit, I have one for sale. I also have a set of Siemens 55 injectors, and the SMT6 piggyback controller for sale.
However, if one of you out there wants to purchase the whole enchilada I am willing to make a package deal for the MAF, injectors and piggyback.
Email me at bostonaudi@comcast.net if interested.
http://cgi.ebay.com/ebaymotors/ws/eB...m=330143819326
However, if one of you out there wants to purchase the whole enchilada I am willing to make a package deal for the MAF, injectors and piggyback.
Email me at bostonaudi@comcast.net if interested.
http://cgi.ebay.com/ebaymotors/ws/eB...m=330143819326
07-04-2007, 11:41 PM
#71
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For those of you who are horny about keeping high boost 'till redline, I wouldn't get too excited.
Basically the K26/8 CANNOT support 18-19 psi up to redline. Sure, you can "artificially" keep the wastegate closed with an EBC, but it doesn't mean your engine is making any more power. The excess heat generated, and excess increase in back pressure will nullify what your higher boost was suppose to achieve. It just looks good on your boost gauge.
To answer the original question:
If you do nothing else but change your AFM to a MAF, then it's not worth it, for the money.
(There is a slight increase because your stock turbo will be able to "grab" its air better)
But, really, I don't know anyone who would just leave it at that (install the MAF and call it a day).
Basically, you buy a MAF to allow yourself to utilize other power producing mods.
Basically the K26/8 CANNOT support 18-19 psi up to redline. Sure, you can "artificially" keep the wastegate closed with an EBC, but it doesn't mean your engine is making any more power. The excess heat generated, and excess increase in back pressure will nullify what your higher boost was suppose to achieve. It just looks good on your boost gauge.
To answer the original question:
If you do nothing else but change your AFM to a MAF, then it's not worth it, for the money.
(There is a slight increase because your stock turbo will be able to "grab" its air better)
But, really, I don't know anyone who would just leave it at that (install the MAF and call it a day).
Basically, you buy a MAF to allow yourself to utilize other power producing mods.
07-05-2007, 03:47 AM
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TurboTommy - whilst I agree with 99.9% of what you say there are plenty of people with S2's and 968's that upgrade to MAF's and are delighted with the results. Ultimately it boils down to what you want to achive and if it's to maximise BHP than the MAF is not going to give you that, however there are other aspects to enging tuning than just power and torque and a MAF will go a long way to giving you all those other things. Yes it's relatively expensive mod considering it is not going to give you night and day difference but it's the combination of those little improvements. Technically MAFs are far far superior to the stone-age AFM and everyone should have one, but unfortunately there is a cost element to consider!
07-05-2007, 12:46 PM
#74
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Originally Posted by TurboTommy
For those of you who are horny about keeping high boost 'till redline, I wouldn't get too excited.
Basically the K26/8 CANNOT support 18-19 psi up to redline. Sure, you can "artificially" keep the wastegate closed with an EBC, but it doesn't mean your engine is making any more power. The excess heat generated, and excess increase in back pressure will nullify what your higher boost was suppose to achieve. It just looks good on your boost gauge.
Basically the K26/8 CANNOT support 18-19 psi up to redline. Sure, you can "artificially" keep the wastegate closed with an EBC, but it doesn't mean your engine is making any more power. The excess heat generated, and excess increase in back pressure will nullify what your higher boost was suppose to achieve. It just looks good on your boost gauge.
07-05-2007, 01:05 PM
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Originally Posted by sawood12
TurboTommy - whilst I agree with 99.9% of what you say there are plenty of people with S2's and 968's that upgrade to MAF's and are delighted with the results. Ultimately it boils down to what you want to achive and if it's to maximise BHP than the MAF is not going to give you that, however there are other aspects to enging tuning than just power and torque and a MAF will go a long way to giving you all those other things. Yes it's relatively expensive mod considering it is not going to give you night and day difference but it's the combination of those little improvements. Technically MAFs are far far superior to the stone-age AFM and everyone should have one, but unfortunately there is a cost element to consider!
Yes the MAF is a better way to measure air but using a MAF and some simple adjustments to sort-of get the DME a correct signal, I'm not so sure about. From what I read it is pretty important to have a wideband and in-cab adjustability for extremes of weather with a MAF. And by extremes I mean a particularly hot, humid June/July like we are having in CO right now.
-Joel.
