SFR blow through MAF vs 'std' MAF kit
09-18-2007, 04:09 PM
#16
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interesting solution! Doesn´t it need an increase air temp measurement range as although with intercooler the charge air will be around 20-50° higher than ambient?
I think in the early MAFs that bosch did (the once that have a heat wire that looks like from a light plug) there was a mechnism that after a certain number of engine start ups heated up the wire to burn deposits.
I think in the early MAFs that bosch did (the once that have a heat wire that looks like from a light plug) there was a mechnism that after a certain number of engine start ups heated up the wire to burn deposits.
09-18-2007, 06:30 PM
#17
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I couldn't have said it any better. Thank you for the feedback Tim.
09-18-2007, 06:57 PM
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09-18-2007, 07:13 PM
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09-18-2007, 07:16 PM
#22
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Wow, talk about digression!
Other than oil on the wire, is there any other side effects to the blow through maf design? And no one can tell me if the performance is different? Hmmm, maybe I should just go to the casino and drop $250 on a single bet. If I win, it was meant to be, if I lose, this technology clearly must suck.
Other than oil on the wire, is there any other side effects to the blow through maf design? And no one can tell me if the performance is different? Hmmm, maybe I should just go to the casino and drop $250 on a single bet. If I win, it was meant to be, if I lose, this technology clearly must suck.
09-18-2007, 08:44 PM
#23
Three Wheelin'
+10 I'm here to end the thread on a bad note. j/k 
I haven't used the SFR MAF stuff, so I can't comment on that. VR's maf stuff works great, and Tim's stuff is as high quality as it gets so you really can't go wrong either way (just don't waste $$$ on a "new" autothority maf setup or anything).
Blow through maf setups do work, however they can be a bit more finicky about the maf placement in relation to the IC piping. For example, if you were to place the maf at a 90 degree angle right before the TB, this could cause a significant increase in airflow turbulence right at the 90 degree turn. With lots of turbulence right at the MAF sensor, it could get a false reading and think there is more air then there actually is due to possible back flow as a result of the turbulence. Any issues like that can cause some poor running characteristics. However, looking at SFR's setup, the IC pipe has a slight transition (looks like less than a 45 degree angle) but is otherwise straight, so it looks to be an excellent design for a blow through setup. This style of maf placement has worked just fine in the Nissan community for years, so I don't see why it wouldn't work on the 951. Of course, I'm speaking theoretically, so take what I say with a grain of salt. lol
As far as performance difference, technically there probably isn't much difference between the 2 different maf placement styles. The one obvious benefit about a blow through setup is you could run a BOV without suffering any negative side effects, plus if you get a boost leak you can just drive around n/a. j/k
I haven't used the SFR MAF stuff, so I can't comment on that. VR's maf stuff works great, and Tim's stuff is as high quality as it gets so you really can't go wrong either way (just don't waste $$$ on a "new" autothority maf setup or anything
).Blow through maf setups do work, however they can be a bit more finicky about the maf placement in relation to the IC piping. For example, if you were to place the maf at a 90 degree angle right before the TB, this could cause a significant increase in airflow turbulence right at the 90 degree turn. With lots of turbulence right at the MAF sensor, it could get a false reading and think there is more air then there actually is due to possible back flow as a result of the turbulence. Any issues like that can cause some poor running characteristics. However, looking at SFR's setup, the IC pipe has a slight transition (looks like less than a 45 degree angle) but is otherwise straight, so it looks to be an excellent design for a blow through setup. This style of maf placement has worked just fine in the Nissan community for years, so I don't see why it wouldn't work on the 951. Of course, I'm speaking theoretically, so take what I say with a grain of salt.
lolAs far as performance difference, technically there probably isn't much difference between the 2 different maf placement styles. The one obvious benefit about a blow through setup is you could run a BOV without suffering any negative side effects, plus if you get a boost leak you can just drive around n/a.
j/k
09-19-2007, 01:57 AM
#27
Three Wheelin'
Originally Posted by TurboTim
Oil in itself can lower the octane rating of your fuel and cause detonation.
09-19-2007, 09:01 AM
#28
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Our MAF can be used as a draw through in front of the turbo (std setup) or a blow-through after the intercooler.
10-09-2007, 06:50 PM
#29
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10-09-2007, 07:03 PM
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On the intake side.The exhaust side will just leave you with a burning oil smell
