mp2-- here is correct;
This is exactly who I'm looking for;
someone with a 91' - 93' se-r, nx2000 or g20;
I've got base settings for you at this time.
Mr. mp2-- Tell me a bit more about how your car is
equipped...? I wasn't aware that your late model
sentra 'sports' a larger maf. What size is it?
Tell me, how did you accomplish running the 70mm
maf? No offense, but I'm sure I've read something
strikingly similar on the net... To the effect:
So & so will be happy to reprogram your ecu for
the z32 maf, but found no.... ect. ect......
Sorry, let me give you a background, my SR is a 95 model low port. It has a ported head, big mechanical cams, 11:1 compression, big tube header with a 3" exhaust, different ECU with a 8600 rpm redline. It makes 200 whp@ 8000 rpm.
On this motor a bigger 70mm MAF made 3-4 hp accross the board. It had your typical lame small bore MAF stock.
On previous experiements, I found no difference in power going to a 70mm MAF with a corrected program on motors up to 170 whp. Once the motor got into the 180 whp range, then a bigger MAF and throttle body seemed to help. Not until the engine started reading a vacume in the intake tract at WOT (indicating that there was an actual restriction) did it make a postive difference. This is on motors beyond your typical bolt on stuff.
I have noticed a slight gain in power at below 3000 rpm and at 5000 rpm with a bigger MAF, on lesser engines proably because of the effective lengthing of the intake tube. This is only 1-2 hp but its repeatable.
Are you sure that your power gains are not from simply leaning the mixture? What A/F ratios are you running before and after the mod?
Would you prefer testing the big MAF on a bolt on car (intake, header, cams, exhuast) or a totaly stock one? I think it has the best chance on a slightly modded car. I do have a wide band UEGO A/F meter.
Mike
__________________
There can only be one Icy Hot Stunta, Don't Hate.
Sorry, I tend to ramble a bit when tired...
Install an EFI and get accustomed to how the thing dithers
back and forth across the scale. Nissan did some really weird
stuff with this lean/ rich oscilation to achive balance. You'll
see about two- to- three oscillations per minute under part- throttle
steady- state cruising; or idle after a real good warm-up.
The EFI is only accurate when under load for minding the mixture.
Put your foot in it, up a long ascending grade is good.
With your stock set- up, familiarity is key to your success
latter on... See the last yellow and first green light?
This is what you're looking for under load... just these two
trading-off; as it were. The techtom will give an oscillating value
switching between the low number [ above zero ] and the
high number .7, .8 [less than one], be familiar with it.
Now you need the dashboard jewelry.
The american version is the same, buy it; you can read the instruction
manual. My first one was jpn; think that wasn't fun?
My only clue was the flowchart. Guys there are alot of people that
have these things; alas, they are usually jewelry.
Set it and leave the augmentation alone... ala correction values.
You have the hot wire 6 [ H6] ... h6 -in h6- out.
Follow the instructions... A word about quick connectors...
Soldering skills and shrink- tubing are the way; tape only if you must.
Let someone really really good install it for you, or don't do it.
This device is serious buisness guys; I bought my newest one from
a guy in Florida, burned -up his celica he did....he missed the
serious part. Raise the correction value [ richen ] see the difference?
look at the EFI; put your foot it... Now put the value back leave it
at zero across the scale... no correction. Get familiar with your
learning computer [ecu] . See how it tries to compensate to the
change you made at idle? It can ,to some degree you know.
This is why you unhook the battery, every time you make a change
to your set- up. A new part [mod] you do this right? twenty
something start-up cycles...What ? ... Hook up the battery and take
it out and drive the crap out of it; it'll learn fast...
Sorry guys, but you've just been misled too long about things that
have no value, because you have a mystical nissan that doesn't
respond to the things ' others' are using... I just read a post about
some new cams on the ser. net and 200hp and cam timing and
solid lifters [ I have some jun lash killers] and Oh! a 70mm maf
on a normally aspirated engine... I thought it had no value?
Wasn't it this guy who only had hydrolic cams ground, that spouted
zero cam timing; invented under -the curve cam- speak to mystify
you when engine builders call this ramp- rate....
and then there's Sara and her ' stick to your hydrolic lifters'
solid ones require maintenence.... That rack of yours' Sara;
now come- on, thats somebody elses toolbox isn't it?
Pay attention guys, you've just been misled too long...
Another day, I'll explain to you why you want a super ITC.
You do have one of these don't you?
Mp2:
Man, you're equipped... sure you've got me beat.
Look, you've just answered your own question.
Somebody else guessing at your fuel map and air consumption...
You've got to take control of it yourself and bring it in.
Thats the principal of the power fc, haltek and other programables.
I don't understand why you took off the maf?
Gotta go for now.
Snip
Sorry guys, but you've just been misled too long about things that
have no value, because you have a mystical nissan that doesn't
respond to the things ' others' are using... I just read a post about
some new cams on the ser. net and 200hp and cam timing and
solid lifters [ I have some jun lash killers] and Oh! a 70mm maf
on a normally aspirated engine... I thought it had no value?
Wasn't it this guy who only had hydrolic cams ground, that spouted
zero cam timing; invented under -the curve cam- speak to mystify
you when engine builders call this ramp- rate....
and then there's Sara and her ' stick to your hydrolic lifters'
solid ones require maintenence.... That rack of yours' Sara;
now come- on, thats somebody elses toolbox isn't it?
Pay attention guys, you've just been misled too long...
Another day, I'll explain to you why you want a super ITC.
You do have one of these don't you?
What you describe is the normal closed loop operation, its nothing weird, the engine will cycle up to 8 times in 10 seconds while it dithers in closed loop under light load conditions, not every few minutes. If you see changes in a few minutes, its because of Alpha or the long term fuel trim is coming into play, also another normal modern ECU function. If you exceed about a 10% change in MAF voltage, you will start to activly fight the control loop.
You also can't tune well with Hal meters, et al and other narrow band O2 sensors.
As far as Zero cam timing, what are you talking about? What is a curve cam? What are you talking about in general? You are hard to understand?
Mike
__________________
There can only be one Icy Hot Stunta, Don't Hate.
Mp2:
Man, you're equipped... sure you've got me beat.
Look, you've just answered your own question.
Somebody else guessing at your fuel map and air consumption...
You've got to take control of it yourself and bring it in.
Thats the principal of the power fc, haltek and other programables.
I don't understand why you took off the maf?
Gotta go for now.
.
What I am saying is very simple, in my testing which is pretty carefuly controled, as much as you can with the dyno's etc. that are availible to the public, a bigger MAF doesnt make any difference worth the expense until you have a pretty wildly modifed engine.
Are you claiming that a big MAF helps on stock or near stock engines? Do you have any specifc numbers to share with us? They way you write is really hard to understand what you are getting at. Do you want us to test something? Are you claiming anything? I am getting confused to what you want and what you are trying to say.
I know for sure that that's Sarah's rack, I have actualy seen it.
Mike
__________________
There can only be one Icy Hot Stunta, Don't Hate.
I still want ya to bring your setup to Dallas this weekend and dyno it. I'm with Mike the way you ramble I can't understand what ya want. If it kicks so much butt bring it on. I've tuned lots of SR20's and most of the old school guys know me I tell it like it is. If it works I'll say so if it don't I'll say so too. By the way we can dattalog too I helped develope this www.300degree.com/electronics/nprobe I know my stuff.
__________________
94 se-r saphire blue with lot's of crap
I'm just a monkey. I don't know shit.
In the white SE-R when the AMG benz did the ricer fly by on 408 :)
Last edited by se-r-57 : Feb 16th, 2004 at 07:08 PM.
and then there's Sara and her ' stick to your hydrolic lifters'
solid ones require maintenence.... That rack of yours' Sara;
now come- on, thats somebody elses toolbox isn't it?
Pay attention guys, you've just been misled too long...
What does this statment have to do with this topic?
misled by whom? Sarah? huh? please explain...
maybe you should try adding a few spaces between your statements, its hard to follow what you are saying..
It also appears as though you really don't want to answer any direct questions.
O.K. , sorry; I mixed too many messages above.
- You are correct, it was a typo; the oscillations on the
mixture are per second.
- The reference to Sara was the cam shoot-out
article on Nissan Performance Mag, or perhaps sport compact
car web site, but I thought you'd recognize it.
- I never heard anybody claim to run stronger
going lean, this is news to me. Are you saying you've
done this? 13 is too lean 11 is too rich for a normally aspirated
motor. 9 is what your heading to if you're blowing serious.
Look, in cyberspace, you're only as good as your word.
Try some trading; snake- oil salesmen and performance chip
people don't last long...Junk stops selling. We go in, now and
then and warn people-off about the R.V. bathroom- fans
people are trying to sell like the real e-ram....
I Don't have a fancy store-front to show you; or an illusion in
cyberspace; or the dyno numbers...and I won't lie about it...
Are you running the big MAF or not?
When you find somebody who wants to try it, has the equipment
I told you about and will satisfy the editor that it is installed
[ I tend to like Mr. young; never met him ].
**** I will give this item to the brave soul amoung you
willing to try it. You keep it; That person won't remove it.
**** I will buy back the EFI for $100.00 , the going rate;
the really good tuning item you're so willing to poopoo.
I can use another one anyway.
**** I'll buy the fourth generation s- afc... still working...
for $220.00 or the fifth generation model for $250.00
[ hey, I can get 'em that Cheap ].
and I can use a back- up If one of mine fails....
My tuning is based on it.
**** We'll ask Mr. young to referee the whole thing.
Does nobody looking really have this stuff?
Hey, I 've got to keep my word here guys...
I came here to go to the marketplace remember?
I'm not coming to Dallas. I don't have anything
to prove, but I get so tired listening to people
who buy part w, x, y,
with a promise of 15, 20, and 10 horsepower- from
people who may be fudgeing the numbers;
and it never works out like that anyway.
W- is making cajun, X- is making sausage and
Y- is making italian food; and it all smells soo- good,
but when you mix it up it tastes like crap, why is that?
The guys' car down the block is just like yours,
but he always takes-you by just a little... why is that?
Its tollerance variation and it came with your car.
Did somebody write your fuel map on a dyno?
Did you hold the stopwatch on your dyno to
see who got the horsepower and torque first?
Your still not listening; go back to the last question.
If you counted on somebody writing the map to play
with the maf, its ballpark at best, read conservative...
How did they account for the rest of your equipment?
not...
The aussies are burning roms like crazy till they get it
right; some of them still know how to tune.
I'm guessing you're still running 259 injectors; I nearly
maxed mine the other night when it was really cold.
From 30 to 100 I hung right with
the guy in the 350z, but he got away when I made the
4th, to fifth upshift and it came off the cam too far to
keep up with him... all of this
from a 91' nx 175k original miles 9.5 to one compression
lacking somewhat by now, but when you spin it fast
it does'nt have time to leak- down.
I bought a set of hks cams new for $350 on e-bay
[ woops] anyway 264, 10.5 lift. and I have an
ignition timing controller. Have you caught me
fibbing yet? I had a full tank of gas, tool boxes
behind the seat, and a very big stereo- which
fills the hatch and there is no room for the spare...
I have too many of these dam mafs; somebody
try one ..
I will hold your hand by phone if necessary and help
you bring it in- to your car...
You drive it everyday; and your gawd gave you
a seat- of- the- pants evaluation to serve you
when your brain fails to do it.
- The reference to Sara was the cam shoot-out
article on Nissan Performance Mag, or perhaps sport compact
car web site, but I thought you'd recognize it.
- I never heard anybody claim to run stronger
going lean, this is news to me. Are you saying you've
done this? 13 is too lean 11 is too rich for a normally aspirated
motor. 9 is what your heading to if you're blowing serious.
Are you running the big MAF or not?
**** I will give this item to the brave soul amoung you
willing to try it. You keep it; That person won't remove it.
**** I will buy back the EFI for $100.00 , the going rate;
the really good tuning item you're so willing to poopoo.
I can use another one anyway.
**** I'll buy the fourth generation s- afc... still working...
for $220.00 or the fifth generation model for $250.00
[ hey, I can get 'em that Cheap ].
and I can use a back- up If one of mine fails....
My tuning is based on it.
**** We'll ask Mr. young to referee the whole thing.
I'm guessing you're still running 259 injectors; all of this
from a 91' nx 175k original miles 9.5 to one compression
lacking somewhat by now, but when you spin it fast
it does'nt have time to leak- down.
I bought a set of hks cams new for $350 on e-bay
[ woops] anyway 264, 10.5 lift. and I have an
ignition timing controller.
I have too many of these dam mafs; somebody
try one ..
I will hold your hand by phone if necessary and help
you bring it in- to your car...
I still don't understand what you want? A test of a Nissan 70mm MAF? Sarah doesnt write for SCC. SR20's general make the most power naturaly asperated with the A/F ratio in the low 13:1 range. 9:1 is so rich it will bairly take throttle. I am running a big MAF and do so on engines I tune that put out more than 180 hp. What is a good tuning item I poo poo? I poo a lot of alleged things, all of which don't work. I run 370cc injectors. Whats an item?
Your writing is still really hard to understand what you want.
Mike
__________________
There can only be one Icy Hot Stunta, Don't Hate.
Master of Level 9
Last edited by myoung : Feb 17th, 2004 at 07:54 PM.
huh? I must be dense today.. missed that compeltely
Me too but I'm old so go figure
__________________
94 se-r saphire blue with lot's of crap
I'm just a monkey. I don't know shit.
In the white SE-R when the AMG benz did the ricer fly by on 408 :)
I just wish this guy would reply in english. None of the moderators understands what he wants either.
He seems to have an interesting point I think, can't be sure though.
Mike
Exactly...and the replies look like some kind of bad poetry competition entry. Hence the rap-off comment. Jeez...c'mon, I'm getting up there too...just tryin' to stay hip with a kid on the way.
