Old cast cartech FMU VS. New billet BEGI FMU - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-08-2007, 01:19 PM   #1
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Default Old cast cartech FMU VS. New billet BEGI FMU

What are the major differances?
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Old 01-08-2007, 01:21 PM   #2
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Differences to the end user? The billet one is alot prettier. Corky said the new model is easier to produce, but both function identically.
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Old 01-08-2007, 01:24 PM   #3
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Quote:
Differences to the end user? The billet one is alot prettier. Corky said the new model is easier to produce, but both function identically.
Thanx.. i just picked up one of the cast ones on e-bay for 5 bucks
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Old 01-08-2007, 01:30 PM   #4
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i had a feeling you would
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Old 01-08-2007, 01:31 PM   #5
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gota be better than the paxton/vortech un-adjustable one i have
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Old 01-08-2007, 01:35 PM   #6
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Wow, good score! I'd send it to Corky for rebuild and testing, just to be safe. He only charges $30 and it will work like new. And Run 2 check valves!

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Old 01-08-2007, 01:36 PM   #7
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i will prolly do that
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Old 01-08-2007, 01:40 PM   #8
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yeah no difference. typically just the size of the ports. (1/8" vs. 1/4" on various models). and location of the needle valve. The design is the same.
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Old 01-08-2007, 01:42 PM   #9
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kick ***, now i just have to learnt how to adjust the thing
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Old 01-08-2007, 02:58 PM   #10
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in a nutshell:

throw a FP gauge on the fuel feed line.

then back the top allen-screw out all the way.

start the car and make note of the idle, 35psi.

remove the vacuum line to the APFR and kink the line so as not to stall.

then note the fuel pressure, most likely 50psi.

adjust the top screw to make that pressure 55-60psi. (if no o2 clamp is used)

replace the vacuum line.

stop the car, turn it to ON, jump F/P and GND.

Clamp the return line down with a wrench.

note the max pressure the the pump. (if stock 70-80psi; HP 120-130psi)

move the fuel gauge to the driver windshield. (need about 4' of fuel line)

tighten the needle valve all the way in.

get in 3rd gear and boost the hell out of it. note the psi level.

back the needle valve out and try again to reach the desired psi level.

if you need help determining fuel pressures based on power levels and injector size read my FAQ.

Corky has his instructions on his site as well.
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Old 01-08-2007, 03:08 PM   #11
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Ok, follow all that, but adjust fuel based on your wideband gauge (and log). Use the pressure gauge just to ensure that the adjustment to the FMU resulted in an actual difference in fuel pressure. The actual fuel pressure numbers aren't important; fueling he motor properly is.
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Old 01-08-2007, 03:17 PM   #12
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god damn it, someone outbit me!!!!
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Old 01-08-2007, 03:17 PM   #13
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outbid, and i was in a meeting and missed it, i hate ******* ebay
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Old 01-08-2007, 03:22 PM   #14
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i thought you used a snipe feature
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Old 01-08-2007, 04:17 PM   #15
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na the damn thing had no bits, only 90 ppl had looked at it, and had 30 minutes to go
so i bid on it and went to a meeting


then someone got the damn thing for 20 bucks!!!
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Old 01-08-2007, 04:44 PM   #16
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should went for 30 on the initial you tried to cheap out at 19.50 didnt ya :gay: next time insist on haveign ebay on refresh or a secretarie bidding it for you. j/k
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Old 01-08-2007, 04:54 PM   #17
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just email him and offer him $50...i bet he goes for it.
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Old 01-08-2007, 05:17 PM   #18
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hahahah forget that, i dont want it for 50.. i will just live with my Vortech and buy a megasquirt later
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Old 01-08-2007, 05:38 PM   #19
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heh, one of the reasons why you gotta get a web phone. ebay on the treo ftw
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Old 01-08-2007, 05:49 PM   #20
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ebay is FTL.
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