Nismo Afm's

[noone]

Having my 32GTR tuned today power fc and nismo AFM'S I brought of a member on here Tuner wasted ages trying to get the Nismo's to work set as vg30's in the powerfc tryed to use the correction tables etc supplied with the meters no go running lean as even at idle is there some sorta trick to make these work, Have I just been ripped off any one got any ideas will post up some more details after I pick up the car in the morning and have a chance to chat with him a bit more.

Frustrating with all the time trying to sort the Nismo AFM's and then retune with the stockers it took all day.

Is there any easy way to test these out with a multimeter or something pretty unhappy really.

[R31Nismoid]

The tuner should be able to tell you in a matter of mins if the AFM's are faulty.

I dont see why it should take half a day of stuffing around to realise this (or check them)

IMO it sounds like the guy might not know what he is doing at this stage

[noone]

Half a day May have been an ever so slight exaggeration on my part, Dont have a whole lotta choice in tuners where I am living, and as I only had a quick chat with his offsider (he was trying to get the car sorted) I will reserve my judgement till I chat to him personally in the morning.

Was just trying to get a bit of imput on what may be wrong and if there is anything we have missed in the basic setup, personally thought put in correction table, tune away easy as ? Not sure?

Roughly how long do you think it should take to setup/tune a power fc from scratch? It has only the normal light bolt on mods exhaust pods(soon to be replaced with a box damnit) boost controller highflowed turbos etc.?

Edited March 28, 2007 by noone

[Beer Baron]

I wouldn't have bothered switching afm unless you were maxing the old ones. even when maxed there is still a little leeway. basically anything under about 280rwkw and I would have just stuck with the stockers. 300rwkw + and I'd change to the nismos. they may be faulty, unfortunately that is the risk when buying second hand afms.

[noone]

Yeah shoulda brought new I guess planned on upgrading fuel supply and turbos real soon hence the nismos

[Scooby]

i've heard from someone that has tuned with them that they take longer to get right if you don't know them as you can't simply use Z32 etc settings. but you're not paying them to learn so ask them if they can or can't, and if not try to get something the PFC will recognise instantly.

[sav man]

I have Nismo AFM's, in the box you would have got a peice of paper that shows the voltage curve diferences between the gtr, z32, and nismo AFM's.

You or your tuner will need to select the VQ30 option, and then edit the % on some voltage levels, i have a spreadsheet that shows the % settings to put in the PFC.

this is my peice of paper i got, i put the grid in, and the red lines are PFC voltage markers.

this it the spreadsheet that has the pfc % settings.

[paulr33]

just to note, changing the % corrections for each voltage range on the AFM option (which ever)

controls the load axis placement on the map, and not the actual voltage itself.

ie: if you dial in 80% at 1.0v you wont see 0.8v on the hand controller or under sensor sw check but on load axis it will 80% trim it to give you the final output on the load axis

just something i observed in my hunt for the load axis calculation which uses afm v * CONST / correction in the ljetro version

[STRYKR 33]

it might not be the AFM, maybe your PFC. I had the same problem. I bought a new Z32 and it just kept on running lean. The guys from Bel Garage tried everything. They said this has only occured once previouly and I was the second customer.

[Sydneykid]

My understanding has always been that the Nismo 65 mm AFM’s are simply the standard GTR AFM bodies fitted with Z32 sensors. Hence the Z32 selection on the PFC AFM table is pretty damn close, in fact so close that it doesn’t affect the tuning process.

I haven’t tuned with Nismo AFM’s, but I have used standard GTR AFM bodies fitted with Z32 sensors and that’s what we did to do the tuning. It worked fine, the car ran perfectly and was as easy to tune as any other GTR with a PFC ie; simple and straight forward.

cheers

[sav man]

There diferent enough to be a pain in the arse. My tuner wiped my setting out the first time he tuned it, and he had to put a heap more fuel in with the temp settings to limp it back to his shop from the dyno. I put my settings back in, and it ran fine again.

Edited March 29, 2007 by sav man

[noone]

Yeah got the car back and for the fairly stockish state I was quite happy and picked up quite a bit with the PFC and still running stock AFM's

So I dont think there is anything wrong with the PFC and I had the graph and table thingo above, thanks, the tuner was given those when I took it in to tune and said he had tried those settings with no luck?

He amits he isnt sure whats going on with them and said that with even with heaps (200%) on the injector values he still couldn't even get it to idle without being lean as. He suggests not using em anyway and going with z32's when I need em but as I just fitted an ARC induction box I really dont wanna use 80mm AFM's as I would have to modify the box and this may not be possible due to the design of the box etc.

and I really like the box

Kinda pissed off about it all there is 1 other tuner in town who i havnt used but have heard some good stuff about might even speak to him too.

Spoke via pm to the SAU member I brought them from and he assured me they were working for him when he tested em by doing the following

"i went into the menu in the power fc that allows you to advance timing and injector values accross the whole map (these are only temporary and are wiped as soon as the car is turned off) and put in about 130% or so.By doing that the car idled at 15:1 and was rediculously rich on boost (we had a wideband sensor installed to map the afr's.) "

Being a little new to the whole PFC thing I assume that this was along the lines of what My tuner had been trying only he ended up at 200% (as I stated above though probably using the wrong terminology)and still no go?

Not sure quite what to do ????

Am I wrong in thinking they could be checked with like a multimeter etc or no?

Spose it cant hurt to go have a chat to his opposition (the other tuner) and see what he thinks but thus far these guys have done okay by me so dont wanna seem to be backstabbing or anything, its a fairly small town and word gets around you know what I mean.

[R31Nismoid]

He amits he isnt sure whats going on with them and said that with even with heaps (200%) on the injector values he still couldn't even get it to idle without being lean as. He suggests not using em anyway and going with z32's when I need em but as I just fitted an ARC induction box I really dont wanna use 80mm AFM's as I would have to modify the box and this may not be possible due to the design of the box etc.

and I really like the box

Have you tested them yet?

And why would you use Z32's? The Nismo's are the same thing, just fits the stock GTR piping.

[noone]

Can anyone confirm SydneyKid's suggestion above (not meaning to doubt ya mate) and actually tried it with nismo AFM's looking at the graph above and gestimating (I cant read Japanese) which is which meter they do look awful close.

Does going to an 80mm AFM ieZ32 make alot a difference to flow or is that only going to be an issue with monsta power that I dont have and probly wont anytime soon.

The ARC induction box is so nice though

[noone]

Oops double post

Edited March 30, 2007 by noone

[noone]

Nismoid Actually not real sure HOW to test em, was thinking could try doing it temporary as quoted above from the guy I brought em off but dont have access to anythin to measure air fuel ratios?

Is there another way ie. multimeter etc. and yeah dont really wanna go Z32's thats why I brought the nismos to begin with seemed a much neater option then repipeing to suit Z32's

Edited March 30, 2007 by noone

[noone]

So does this mean there is no easy way to test these?

[noone]

Okay for the help of others who like me ask questions without searching I found this thread

http://www.skylinesaustralia.com/forums/in...hl=testing++afm

Not the correct pinouts for an rb26dett ,at least I dont think

Will post them up too if I can find em, or if you know feel free to post!!

[Pauly33GTS-t]

quintrouple post? lol

dont know if that helps for testing.

Edited April 3, 2007 by Pauly33GTS-t

[noone]

Thanks for that sure I can work it out with a multimeter anyway but That will make a bit easier though so cheers.