Miller PSIK

[jules325i]

Is anyone on here running the miller PSIK with stock 325i or Stroker.
Any Independent Dyno Results.
I am really considering getting one.

I have a 2.9 stroker with stock air box throttle body and ecu.

[MR 325]

Miller claims amazing numbers I personally do not believe.

I'd spend them same amount of money on a plug and play Megasquirt from blueapplesoda or whodwho.

[jules325i]

Miller claims amazing numbers I personally do not believe.

I'd spend them same amount of money on a plug and play Megasquirt from blueapplesoda or whodwho.

Yeah 25hp from a aluminium tube and a pod filter sounds a bit optimistic.

Is installing megasquirt very involved.

[kamotors]

If you get a Whodwho megasquirt all you have to do it run a vacuum line to it, and use a GM temp sensor and your good to get the car running and start tuning. MS was worth every penny IMO

[CptnVortex]

I'm running the PSIK on my 327i swap. I do not have any Dyno results, but I can say it made a definite improvement, especially in the mid range where torque tends to fall. Now there doesnt feel like there is that dead zone of torque and power between 2200 and 3500 rpm. It does sound pretty great also, and the chip has a higher redline, somewhere around 7krpm.

[Kershaw]

i installed an m30 afm into my car (put m20 internals in it) and my ix feels like it has more torque and when climbs into power, it does so a lot faster. thats all butt dyno. i also gained +3mpg. i went from seeing 19-20mpg to consistently seeing 23.5mpg. and yes, im using my old m20 internals so nothing there changed.

so im a firm believer that the afm is a restriction on our cars. and i thought they claim 25whp with the psik AND the war chip. which is a bit of a stretch, but not wholly out of the range of reality. 5whp for the intake and 20whp for a legitimate tune.

[jules325i]

If you get a Whodwho megasquirt all you have to do it run a vacuum line to it, and use a GM temp sensor and your good to get the car running and start tuning. MS was worth every penny IMO

So i would have to tune my car myself i have very little knowledge in that department.

[digger]

Toftt

[jules325i]

Toftt

?

[nando]

i installed an m30 afm into my car (put m20 internals in it) and my ix feels like it has more torque and when climbs into power, it does so a lot faster. thats all butt dyno. i also gained +3mpg. i went from seeing 19-20mpg to consistently seeing 23.5mpg. and yes, im using my old m20 internals so nothing there changed.

so im a firm believer that the afm is a restriction on our cars. and i thought they claim 25whp with the psik AND the war chip. which is a bit of a stretch, but not wholly out of the range of reality. 5whp for the intake and 20whp for a legitimate tune.

it's mostly from the tune. you don't get 5whp from making the AFM larger or replacing it, and the TB is still only 60mm.

[Kershaw]

i read a diy on the m30 afm conversion and the guy had dynos done before and after. he gained 3whp. same shop. i havent done dynos, but i feel a difference. so i think 5whp from an intake thats as long as the psik is plausible.

i'll give them the benefit of the doubt and say they experimented with different lengths to see which give the best results due to hem-holtz resonance.

and you're right, the next thing to increase the size of would be the throttle body.

[nando]

yeah, but the stock TB isn't a restriction on a stock motor, either. at least, not at an RPM that the stock engine can make power. I have real measurements to prove that. :)

[digger]

?

Take One For The Team

it is worth noting that there are more to intakes than whether or not they pose a restriction. The intake is essentially a tube with size and length and therefore volume which influences how the waves that are generated as the intake valve opens and closes will travel, these pressure waves can have positive and negative benefits if tuned correctly.

[ForcedFirebird]

it's mostly from the tune. you don't get 5whp from making the AFM larger or replacing it, and the TB is still only 60mm.

60mm will support a ton of flow. without going into math, I have memorized that a 65mm TB will flow 440cfm, only because we use them a lot on 60v6.

i read a diy on the m30 afm conversion and the guy had dynos done before and after. he gained 3whp. same shop. i havent done dynos, but i feel a difference. so i think 5whp from an intake thats as long as the psik is plausible.

i'll give them the benefit of the doubt and say they experimented with different lengths to see which give the best results due to hem-holtz resonance.

and you're right, the next thing to increase the size of would be the throttle body.

yeah, but the stock TB isn't a restriction on a stock motor, either. at least, not at an RPM that the stock engine can make power. I have real measurements to prove that. :)

It's easy to see if the throttle plate is a restriction. Measure vacuum just before/after the plate and anything more than 2" difference equals restriction.

Take One For The Team

it is worth noting that there are more to intakes than whether or not they pose a restriction. The intake is essentially a tube with size and length and therefore volume which influences how the waves that are generated as the intake valve opens and closes will travel, these pressure waves can have positive and negative benefits if tuned correctly.

You said that to me once, and was confused lol. It sure is easy to theorize on a forum, rather than prove results.

Butt dyno results are just that.

[digger]

60mm will support a ton of flow. without going into math, I have memorized that a 65mm TB will flow 440cfm, only because we use them a lot on 60v6.

It's easy to see if the throttle plate is a restriction. Measure vacuum just before/after the plate and anything more than 2" difference equals restriction.

You said that to me once, and was confused lol. It sure is easy to theorize on a forum, rather than prove results.

Butt dyno results are just that.

If you look at the miller curves between the MAF kit and PSIK there are lowend/midrange gains that can't be attributed to the removal of the AFM or the tune (both don't have AFM and are tuned for the setup) and you don't really get lowend torque gains by "reducing restriction" so if the gains are real they must be from something else.....if i had a stock car i'd be all over the PSIK and would do back to back testing. I have been meaning to get just the pipe section without the MAF but any testing i do is likely to be unrepresenative for others beacue i have a modded airbox setup anyway.