Results of LRMAF install and dyno
#1
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Results of LRMAF install and dyno
I installed the Land Rover 82mm MAF housing and had the car dynoed before and after the install. Modified my SAFCII sensor settings to IN 1 and OUT 17.
The throttle response felt greatly improved throughout and there was a definite increase in the sound from the CAI.
I felt very excited driving to the dyno shop. That feeling disappeared after seeing the results.......
The throttle response felt greatly improved throughout and there was a definite increase in the sound from the CAI.
I felt very excited driving to the dyno shop. That feeling disappeared after seeing the results.......
#7
I still dont see why there would be HP gain in the first place. is using a larger MAF similar to using big injectors and having alot of - a/f corrections? which makes the ECU select different values on the timing table and indirectly advance timing?
#8
Originally Posted by streetzlegend
I still dont see why there would be HP gain in the first place. is using a larger MAF similar to using big injectors and having alot of - a/f corrections? which makes the ECU select different values on the timing table and indirectly advance timing?
#9
Originally Posted by streetzlegend
I still dont see why there would be HP gain in the first place. is using a larger MAF similar to using big injectors and having alot of - a/f corrections? which makes the ECU select different values on the timing table and indirectly advance timing?
See this thread: http://forums.maxima.org/showthread.php?t=528554
His data proves that it can add HP based solely on airflow and not on altered ignition or cam timing.
Even before that thread though, it had been proven to make power by SR20DEN a few years back, but nobody paid any attention until recently.
#10
I made an extra 10whp at redline (it might actually be MORE, my pre-MAF dyno was on 76*F weather, the post-MAF dyno was on 101*F weather). I used a 3" PVC pipe for mine (76.5mm).
I think that off the bat, people using the 82mm MAF loose power because 82mm= 3.23". Which basically sets up the normal 3" intake setup with a MAF that is slightly bigger (air slows down here then speeds up after the MAF once it goes into the midpipe).
Me on the other hand, with a 76.5mm (3") ID MAF, i keep a CONSTANT 3" ID from the airfilter, to the mouth of the TB.
That is my theory.
I think that off the bat, people using the 82mm MAF loose power because 82mm= 3.23". Which basically sets up the normal 3" intake setup with a MAF that is slightly bigger (air slows down here then speeds up after the MAF once it goes into the midpipe).
Me on the other hand, with a 76.5mm (3") ID MAF, i keep a CONSTANT 3" ID from the airfilter, to the mouth of the TB.
That is my theory.
#11
Originally Posted by DasYears
nmex showed gains and he used an LRMAF. he didnt gain much the first time around, but then with the revised intake tract there was a difference.
#12
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Originally Posted by NmexMAX
Apparently you didn't notice. I dyno higher in 3rd.
Originally Posted by NmexMAX
Take that with 3 grains of 6MT swaps fro turbo95max.
EDIT: another question, what gear did you dyno in?
#13
Originally Posted by nismology
It makes HP strictly based on higher airflow through the bigger housing. The stock MAF housing is somewhat of a restriction for the VQ35.
See this thread: http://forums.maxima.org/showthread.php?t=528554
His data proves that it can add HP based solely on airflow and not on altered ignition or cam timing.
Even before that thread though, it had been proven to make power by SR20DEN a few years back, but nobody paid any attention until recently.
See this thread: http://forums.maxima.org/showthread.php?t=528554
His data proves that it can add HP based solely on airflow and not on altered ignition or cam timing.
Even before that thread though, it had been proven to make power by SR20DEN a few years back, but nobody paid any attention until recently.
Ahh i see, So with that said, its very likely that I will also notice some good gains from doing the home depot 3" maf, maybe not on a n/a 3.0 but a FI 3.0 this might be just as effective as the 3.5 if not more. I am doing this tomorrow, already cut up the maf. This will make the mixture leaner, correct? Im going to make less correction to make sure it dosnt go uber lean at 10psi
#14
Originally Posted by DasYears
so are you saying you didnt gain?
EDIT: another question, what gear did you dyno in?
EDIT: another question, what gear did you dyno in?
#16
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Originally Posted by NmexMAX
Interesting results. What other supporting mods do you have? Did you get the DRF's?
#17
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Originally Posted by DasYears
two people have posted losses with the BBMAF and 1 has posted gains...WTF? was a tailpipe sniffer or a wideband in the y-pipe used?
#18
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Originally Posted by NISMAX03
The shop used a tailpipe sniffer.
Originally Posted by NmexMAX
#20
Originally Posted by DasYears
that means youre really running closer to 14:1 in a number of places
not you, i meant the OP.
not you, i meant the OP.
#22
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Originally Posted by NmexMAX
I realize that but that post explains the 'gains' of my LRMAF. Also re: AFR, it would depend if the OP has a test pipe or not.
#23
Originally Posted by NISMAX03
Hey NmexMAX, did you get my DRFs?
I guess take it for what it may be worth. Better throttle response etc.
Originally Posted by 95BLKMAX
I think that off the bat, people using the 82mm MAF loose power because 82mm= 3.23". Which basically sets up the normal 3" intake setup with a MAF that is slightly bigger (air slows down here then speeds up after the MAF once it goes into the midpipe).
Me on the other hand, with a 76.5mm (3") ID MAF, i keep a CONSTANT 3" ID from the airfilter, to the mouth of the TB.
That is my theory.
Me on the other hand, with a 76.5mm (3") ID MAF, i keep a CONSTANT 3" ID from the airfilter, to the mouth of the TB.
That is my theory.
Here's a comparison of the curves.
Also, read this as well. Explains the intakes differences.
http://forums.maxima.org/showpost.ph...3&postcount=25
#24
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Originally Posted by NmexMAX
Sure makes sense since my old intake set-up has a lot of ID variances, which seem to result in a loss of whp.
Also, read this as well. Explains the intakes differences.
http://forums.maxima.org/showpost.ph...3&postcount=25
Also, read this as well. Explains the intakes differences.
http://forums.maxima.org/showpost.ph...3&postcount=25
#25
Originally Posted by NISMAX03
My Place Racing midpipe may have to be replaced with something that has a similar ID as the LRMAF.
#28
What about Samco/silicon hoses? Less heat transfer than metal and less ghetto and obtrusive than ABS PVC (yes, I tried it on my old Altima way back)....
I remember some different types of polycarbonate tubing w/3" ID some time back when doing my own research on alternative intake tubing options...
Jeremy
I remember some different types of polycarbonate tubing w/3" ID some time back when doing my own research on alternative intake tubing options...
Jeremy
#29
Originally Posted by niceguy
What about Samco/silicon hoses? Less heat transfer than metal and less ghetto and obtrusive than ABS PVC (yes, I tried it on my old Altima way back)....
Originally Posted by niceguy
I remember some different types of polycarbonate tubing w/3" ID some time back when doing my own research on alternative intake tubing options...
#30
....actually, I was referring to it AS replacing the PR intake tubing....
http://www.flexpvc.com/cart/agora.cg...VC_Pipe_3_inch
Specs show it to have an ID of 2.9-3.0"....
Mass quantities aren't cheap but here's a clearance sale on a 4' section for $20....
http://www.flexpvc.com/cart/agora.cg...learance_Items
BTW, with a long enough piece (2' tops?), you could perhaps mount the sensor into the tubing...it's flexible to a degree yet fairly dense/rigid enough I would imagine, having used the smaller diameter tubing in the past
Just an example, that's all
Jeremy
http://www.flexpvc.com/cart/agora.cg...VC_Pipe_3_inch
Specs show it to have an ID of 2.9-3.0"....
Mass quantities aren't cheap but here's a clearance sale on a 4' section for $20....
http://www.flexpvc.com/cart/agora.cg...learance_Items
BTW, with a long enough piece (2' tops?), you could perhaps mount the sensor into the tubing...it's flexible to a degree yet fairly dense/rigid enough I would imagine, having used the smaller diameter tubing in the past
Just an example, that's all
Jeremy
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