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Old 09-04-2002, 05:37 AM
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Default vortech fmu questions

i bought a vortech fmu from someone and he told me that it's rated at 12:1. is there a way for me to know what's the real rating is, whether it's a 5:1, 8:1 or really a 12:1? by the way, the color of the fmu is black and not like the current fmu which is blue, i don't know if that mean anything.
Old 09-04-2002, 07:33 PM
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Default Re: vortech fmu questions (_Endless_)

anyone? c'mon guys....
Old 09-04-2002, 07:37 PM
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Default Re: vortech fmu questions (_Endless_)

you need to open up the fmu to see which calibration disk it has.
Old 09-04-2002, 07:37 PM
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Default Re: vortech fmu questions (_Endless_)

You have to measure the disc inside.
Old 09-04-2002, 08:51 PM
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Default Re: vortech fmu questions (niedejb)

is it written on the disc or do i have to measure it? if i have to measure it, what size disc would i expect for a 12:1?
Old 09-04-2002, 10:44 PM
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Default Re: vortech fmu questions (_Endless_)

If its a 12:1 it will just be a HUGE disk, it will take up ALL the space inside the FMU when you open it.... back when I had my FMU on I thought it was a 12:1 till one day I opened it up and found out it was a 10:1 (explained my running lean) so I swapped in the big 12:1 and things went smoother.... check out the pics I have in classifieds where I'm selling my fmu it shows all the discs cept the 12:1 just look at the biggest disc in the pick and the 12:1 is bigger then that, get the idea?
Old 09-05-2002, 02:33 AM
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Default Re: vortech fmu questions (_Endless_)

is it written on the disc or do i have to measure it? if i have to measure it, what size disc would i expect for a 12:1?
You have to measure it. Measure yours and I'll tell you what you got.

Old 09-05-2002, 05:55 PM
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Default Re: vortech fmu questions (niedejb)

the disc inside measures at 2 1/4" diameter. is this a 12:1 or what?
Old 09-05-2002, 06:12 PM
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Default Re: vortech fmu questions (_Endless_)

Archive this one:

12:1 2.71"
10:1 2.46"
8:1 2.22"
6:1 1.85"
4:1 In the car and dont wanna measure it...its smaller though.
Old 09-05-2002, 06:57 PM
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Default Re: vortech fmu questions (niedejb)

damn. that means what i have is an 8:1. will that be enough for boosting at 7psi? thanks man.
Old 11-03-2002, 09:39 AM
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Default Re: vortech fmu questions (_Endless_)

dayum now i gotta measeure mines to see waht i have too....good info
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