Afm Dilemma

[R34NRG]

was reading about afms and came across this

http://nissanskyline.6te.net/AFM.htm

so basicly what are my options if im chasing higher then 350rwkw?????

i thought about changing ecus so i dont have to put up with a afm, but are there any other options?

[paulr33]

twin afm or relocate a large afm into the cooler piping

ash managed to go past 360rwkw with a z32

[paulr33]

and besides when the afm maxes out it will function just the same as the map sensor

[R34NRG]

i just manged to pick up a Q45......

seeing as this is a bit better then a z32 what power should i expect this baby to max out.

how does relocating the afm near the cooler help?

[GeeTR]

...are there any other options?

Some Jpn company makes a doohicky that feeds the AFM inputs of your ECU, with that from a MAP sensor. Fancy micorcontroller HKS? maybe?

And i thought most ppl can get 300-330rwkw from a Z32?

[paulr33]

yeah your thinking of the HKS vein pressure converter - its an inline remapper to let you use map sensors on an AFM style car

its only supported on the Z32 300zx so it wont work on rb25det neo etc, unless your up for custom hacking etc.

the q45 is a bit of a mixed bag, some claim over 400kw some claim they cant go past 250kw with it and the z32 works so much better

so not sure- its a mixed bag as i said. the problem with the q45 is that its 90mm so you have to change a ton of crap to test / use it

so if you try it and its poo youve just adapted all your pipe work etc to suit the 90mm only youll have to change it back to 80mm etc

i would try z32 in the cooler piping and see how that goes or even inside larger diameter piping

using larger diameter piping with the hot wire inside it can give it more resolution , but you need to be careful its not a backyard job

also if you max the afm at say 6500rpm then its OK its only when you max the AFM at say 4000rpm that its sucky

and even then, it will work just like a map sensor djetro style ECU, run along the horizontal load axis

[R34NRG]

thats odd never realised the q45 was such a erratic performer i picked it up for 160bux with a plug on ebay so not to shabby

so what would your recommendations be paul???? should i test the q45 on the intake side or on the cooler side?

Edited February 14, 2008 by R34NRG

[paulr33]

yeah back 2 years ago 400rwkw was no problems on the q45 range

then all of a sudden we had a bunch of dudes who couldnt go past say 250kw

around that power level they would ceiling hit 5v and no more resolution

so not sure why or how - maybe a wrong batch of q45s or something - unsure

i dont think anyone on the forums has seen "official" proof of a q45 over 300rwkw

if it was me and my car i would go z32 relocated in the cooler piping

i dont think youll max it out and if you do it will be at some insignificant rpm

what turbo are you using ?

[R34NRG]

GT3540 with the rb30 bottom end

fark man and here i thought i was the king of the world snappn up a afm better then the z32 for half the price

Edited February 14, 2008 by R34NRG

[paulr33]

who knows it might be one of those magical "400kw" q45's

until you try it - youll never know haha

ash ran a vanilla GT30 with z32 and went past 360kw and didnt max the z32 so you might be ok

[R34NRG]

who knows it might be one of those magical "400kw" q45's

until you try it - youll never know haha

ash ran a vanilla GT30 with z32 and went past 360kw and didnt max the z32 so you might be ok

hope so buddy, cuz u no.....my r34 is the best in australia it deserves the best HAHAHAHAHHAHAHAH

ill keep u guys posted

Edited February 14, 2008 by R34NRG

[paulr33]

make sure the rebuild light works....

[Stock GTR]

make sure the rebuild light works....

Nice valentines day boys. But really, can we talk about some serious radiators. Not the group buy types. but some serious japan versions. Already checked out the trust versions but what else is there.

[R34NRG]

Nice valentines day boys. But really, can we talk about some serious radiators. Not the group buy types. but some serious japan versions. Already checked out the trust versions but what else is there.

although i dunno where the hell u got radiators from, i need one aswell.......

[GeeTR]

Wtf daz was random. Its a bot for sure...

Whats a serious Japanese radiator?

Edited February 14, 2008 by GeeTR

[R34NRG]

does anyone know waht the max voltage reading on a q45 is compared to the z32 and factory afm???

[acsplit]

ash's afm was in front of the turbo..

Put it in the cooler piping before the throttle body.(If your tuner thinks its a bad idea find a new tuner)

[R31Nismoid]

was reading about afms and came across this

http://nissanskyline.6te.net/AFM.htm

so basicly what are my options if im chasing higher then 350rwkw?????

i thought about changing ecus so i dont have to put up with a afm, but are there any other options?

lol, that site never fails to crack me up.

1. It was created from information ripped from these very forums

2. The creator didnt do anywhere near the required research before putting some pretty factual information up (which is totally wrong)

ash's afm was in front of the turbo..

Yep

Z32 - 370rwkw. AFM infront of the turbo, no issues at all.

A Q45 will register more airflow easily if its legit.

Others have done it before.

[Sydneykid]

lol, that site never fails to crack me up.

1. It was created from information ripped from these very forums

That's my table I should have patented it

2. The creator didnt do anywhere near the required research before putting some pretty factual information up (which is totally wrong)

Yep

That creator may not have, but this one did, about 4 years ago and it was the best rule of thumb info around at the time.

Z32 - 370rwkw. AFM infront of the turbo, no issues at all.

That's good effort, better than I have ever achieved.

A Q45 will register more airflow easily if its legit.

In the US I heard that Q40 AFM's are also 90 mm, maybe that's the problem

Others have done it before

Me, just over 400 rwkw and Apexi around 1200 bhp with 2 x Q45's

Cheers

Gary

[paulr33]

Me, just over 400 rwkw and Apexi around 1200 bhp wiht 2 x Q45's

Cheers

Gary

hey gary

can you get us the serial # from this 400rwkw Q45

and also a photo if the label?

i think there could be two types of Q45's going around, one is poo and maxes around 250rwkw and the other is OK and goes past 400kw