MAF says 310 grams/sec@5800rpm......
01-16-2006, 12:00 PM
#11
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My MAF tables are stock so I'm pretty sure I'm actually seeing correct g/s
I'm running a 210º/218º .531/.531 114lsa Vinci Cam with 26º total timing and stock 14.7:1 AFR......
I'm running a 210º/218º .531/.531 114lsa Vinci Cam with 26º total timing and stock 14.7:1 AFR......
01-16-2006, 01:26 PM
#13
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Originally Posted by Yelo
I just saw 328 grams/sec @ 5900rpm a little while ago coming to work.....
I've read a few times that on these trucks if you multiply MAF grams/sec X 1.1 it gets you a pretty close RWHP number.....can anyone back that up ???
mroegrip: If that above calc works out that would put me at around 360ish and you around 440hp at the tires ....do you have a dyno run to compare that too ???
damn...I may finally have to admit that you *might* be faster than me grip
I've read a few times that on these trucks if you multiply MAF grams/sec X 1.1 it gets you a pretty close RWHP number.....can anyone back that up ???
mroegrip: If that above calc works out that would put me at around 360ish and you around 440hp at the tires ....do you have a dyno run to compare that too ???
damn...I may finally have to admit that you *might* be faster than me grip
you have to compensate for how much the blower takes back out of that.
01-16-2006, 03:48 PM
#15
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Originally Posted by zippy
stock should be alot richer than that at wide open.
01-16-2006, 04:00 PM
#16
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At part throttle 14.68-14.7 is fine but, at wide open throttle 12.5-13:1 is about all you want to go for NA.
My stock LQ9 6.0L has pulled down 38lb/min in stock form.
That was a high reading. It routinely will hit 36-37lbs/min though and that is around 5400rpm is I remember correctly
For NA engines I think multiplying the maf lbs/min by 10.5 will give you a close estimate to engine output at the flywheel. It's been a while since I've messed with all that though but, that is what I remember being close.
My stock LQ9 6.0L has pulled down 38lb/min in stock form.
That was a high reading. It routinely will hit 36-37lbs/min though and that is around 5400rpm is I remember correctlyFor NA engines I think multiplying the maf lbs/min by 10.5 will give you a close estimate to engine output at the flywheel. It's been a while since I've messed with all that though but, that is what I remember being close.
Last edited by XLR8NSS; 01-16-2006 at 04:12 PM.
01-16-2006, 04:13 PM
#17
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short of buying a wideband how can I get the AFR at WOT where I want it to be ???
If I use those calculations it looks to be around 430 at the crank and 340ish at the tires....pretty close to the other calculation
If I use those calculations it looks to be around 430 at the crank and 340ish at the tires....pretty close to the other calculation
01-16-2006, 05:56 PM
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Those calculations can't be very accurate. On a nice staedy line on the MAF at 6300rpm I logged 327.79 G/Sec = 360.56 Rwhp
43.26 Lb/min = 454.23 Fwhp
For a peak I found 341.14 G/sec = 375.25 rwhp
45.02 Lb/min = 472.71 Fwhp
The only things I have changed from my dyno pull of 333 rwhp are UD pulley and a different air intake. Oh and my intake air temps were about 40* cooler.
43.26 Lb/min = 454.23 Fwhp
For a peak I found 341.14 G/sec = 375.25 rwhp
45.02 Lb/min = 472.71 Fwhp
The only things I have changed from my dyno pull of 333 rwhp are UD pulley and a different air intake. Oh and my intake air temps were about 40* cooler.
