Apparently the MAF is a big restriction
09-13-2010, 10:43 PM
#22
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Interesting. I'm looking at my logs (85mm MAF, 90MM TB, FAST90) and I'm also seeing 95-96 with one or two 97's. Maybe I'll try the SD tune again sans MAF.
More interesting notes. I just looked at logs from 2007 when I was running an LS6 intake, stock TB and a 2002 Z06 85mm MAF and they all show 98-99.
I know I'm getting 4.63v at WOT and HPTuners shows 100% tps so not sure what to make of this new data.
More interesting notes. I just looked at logs from 2007 when I was running an LS6 intake, stock TB and a 2002 Z06 85mm MAF and they all show 98-99.
I know I'm getting 4.63v at WOT and HPTuners shows 100% tps so not sure what to make of this new data.
09-13-2010, 10:59 PM
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thanks man! I think next time im at the track im gonna do a run with torque management back to full to see how much difference there is... im curious how much that helped even though i dont think it was much.
09-14-2010, 09:45 AM
#26
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A screened 75mm MAF produced about the same pressure
drop as the stock lid w/ silencer, when I was doing "ghetto
flowbench" testing 7-8 years back. A descreened MAF I could
not measure, and I had a resolution of about 1/8"H2O.
drop as the stock lid w/ silencer, when I was doing "ghetto
flowbench" testing 7-8 years back. A descreened MAF I could
not measure, and I had a resolution of about 1/8"H2O.
09-14-2010, 08:47 PM
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Just because some stock piece is "good for xxxHP" doesn't mean freeing that restriction won't help a free a few HP.
Think of exhaust, You can take X Muffler and replace it with Y muffler, and gain 10rwhp, does that mean that X muffler isn't capable of an extra 10rwhp if the motor gains 50hp with some other mods?
Think of exhaust, You can take X Muffler and replace it with Y muffler, and gain 10rwhp, does that mean that X muffler isn't capable of an extra 10rwhp if the motor gains 50hp with some other mods?
09-16-2010, 04:25 PM
#30
"You need to check the key on engine off MAP reading at the time you log to really know how much it changes. I highly doubt the 5 mm difference in size will effect the performance.
Here in Southern Michigan I may see 98 kPa on one day and only only drop to 96 at WOT, others days I may see higher or lower. The barometric pressure changes the readings.
To the OP, if you have a 78 mm stock MAF than you should absolutely see a gain."
Yep, looking at my logs the ones from 2007 were in May whereas this years logs are from August. I'll try the key on thing.
To the post above, I'd like to hear more from jimmyblue on the subject too.
Here in Southern Michigan I may see 98 kPa on one day and only only drop to 96 at WOT, others days I may see higher or lower. The barometric pressure changes the readings.
To the OP, if you have a 78 mm stock MAF than you should absolutely see a gain."
Yep, looking at my logs the ones from 2007 were in May whereas this years logs are from August. I'll try the key on thing.
To the post above, I'd like to hear more from jimmyblue on the subject too.
