Z32 Vs Q45 Afm

[Brycey]

just wondering, which is the preferd AFM for large turbos on RB25's?

the Q45 obviously has more flow because of the 90mm neck but apparently their low down resolution doesnt compare with the Z32, making the control at lower throttle levels not great compared to the Z32, how true is this? what would you prefer out of the 2?

[R31Nismoid]

depends on the setup.

no-one can comment with such a high level of unknowns

[Brycey]

i was just asking of a general nature, which is more preferd/ more reliable/ more efficient.

but, my setup is a RB25DET 5 speed with custom high mount manifold, garret GT3040 with external tial gate, 740cc nismo injectors, greddy intake( thats the only thing i havnt got yet, cant bloody find one, if you have one PM me! ), large front mount, full exhaust.. i think thats about it ( its still getting built, all this is in my 1973 240z)

any recommendations

[paulr33]

forget the plenum, its useless. the q45 does measure lower at idle and low load (so ive read a few times). the mafia has q45 + gt30 you could ask him as his runs powerfc and q45 afm.

[R31Nismoid]

well you only need a Z32 for your setup. Z32 cover it easily.

So that is what you would use.

[The Mafia]

but apparently their low down resolution doesnt compare with the Z32, making the control at lower throttle levels not great compared to the Z32, how true is this? what would you prefer out of the 2?

<{POST_SNAPBACK}>

That rumor is crap. At low revs, my car is fine. Not one single problem with the Q45. Idles like a dream.

Now, The Garret GT30 has a 4 inch intake. Why in the hell would you want to come 4 inch off the GT30, then drop the size of the piping to 3 inch to a z32? Can anyone say "bottle neck"?

Since the internal diameter of q45 is about 90% of 4inch, you lose very little intake size, meaning you can keep a nice big 4inch size all the way through.

I bought a Q45 for $180, and it runs fine, no problems at all. Z32s are the same or much more.

Also, You'll be able to use the q45 for your 380rwkw project...lol

Edited November 27, 2005 by The Mafia

[Bl4cK32]

yer i got a q45 running on my 3lt. Idles fine with 550cc injectors on the PFC.

[paulr33]

what voltage does it show at idle ?

[R31Nismoid]

380rwkw from a gt30?

but meh, it isnt a restriction, we used on my car the Z32... the inlet on the turbo might be 4", but where its actually sucking air into the comp housing... far from 4"

[Guilt-Toy]

just wondering, which is the preferd AFM for large turbos on RB25's?

the Q45 obviously has more flow because of the 90mm neck but apparently their low down resolution doesnt compare with the Z32, making the control at lower throttle levels not great compared to the Z32, how true is this? what would you prefer out of the 2?

<{POST_SNAPBACK}>

Hey bryce

Told you it sounded like crap to me. Remember 50% of what people tell you when they are trying to sell you something is bullshit =)

Anyway the guys here are allways keen to comment...

I got a Q45 afm too so its all good now since this is all cleared up.

[Bl4cK32]

what voltage does it show at idle ?

<{POST_SNAPBACK}>

1.17v @ 850rpm