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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Fri Nov 15, 2013 11:06 pm 
forcefedtuner wrote:
http://www.freescale.com/files/sensors/doc/data_sheet/MPXHZ6250A.pdf

Thats what you need. Rewire, scale it, done


Power Commander 3 is all I've found for the majesty 400.

My sensor is 3 wire and the Freescale is 4? Can you explain more on wiring and scaling? I'm new to fuel injection but get my head around things easily.

I was assuming the voltage on a 1.5 bar would confuse my OEM ECU. Scaling the voltage to match would fix my problem?

I was also assuming the rhb31 would put out more than enough boost on my 400cc motor. Just figured that would be a trial and see deal.

I'm back to here today.
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Took the dome off my piston and I'm going to add some material on the inside of the piston. I don't want the top to collapse. Otherwise I have everything squared away on hoses and lines. Ill install the aem wideband and dish gauges. Still waiting on oil lines for the turbo.

Help me through this sensor please.


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Junior Mint
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Sat Nov 16, 2013 1:08 am 
On that sensor you only use 3 pins. But honestly you can get what ever you want and just configure the pressure configuration table on the power commander V software.

Also. IMO , I would've left the piston alone or get a flat top.

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Needs Training Wheels
Needs Training Wheels

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Location: Springfield mo
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Sat Nov 16, 2013 6:52 am 
forcefedtuner wrote:
On that sensor you only use 3 pins. But honestly you can get what ever you want and just configure the pressure configuration table on the power commander V software.

Also. IMO , I would've left the piston alone or get a flat top.


I have a commander III not a V. Can I configure the pressure on the III?

This is the piston I have. I machined the dome off.
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Junior Mint
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Sat Nov 16, 2013 9:45 am 
pc3 is the ecu. PC V is the software and yes you can do that

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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Sat Nov 16, 2013 7:04 pm 
Update. Another all nighter. Tore it down to do the 3 base gasket stack and take the dome off my piston. The piston was thin between the wrist pin bosses without the dome so I welded some material back on. This should get my compression down around 9-1. I have a picture of my piston with a stock 125 piston just for cool factor.

I am excited to say I have every part now to start it. The oil lines finally came!
I'm going to try this other check valve I bought today for a Honda civic on the map sensor. It's boost blocking but doesn't leak boost. We ll see otherwise ill call and get a 1.5 bar sensor.

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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Sat Nov 16, 2013 8:11 pm 
DAMN this is awesome! Beautiful welding! Can't wait to see how this turns out. :highfive:

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He's running our pipe. Either it made too much power and spun the rear, or was so loud he went blind and crashed.... 50/50.


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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Mon Nov 18, 2013 1:34 am 
I ordered one of those sweet little cbr looking tails and thinking about some lower bars. Slide the fork up a bit in the clamps too. I'm liking the other guys lowered and stretched scoots. I built this as a stock looking sleeper in mind but I've kinda ditched that look with a turbo and intercooler hanging off the sides.

The nightmare continues. Absolutely ridiculous amount of wiring and hoses on this thing. The majesty added a bunch of extras and this turbo puts it over the edge. I really have to keep rolling on it.

I added 2 crank case breathers to the motor
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I added 5 more gauges: EGT(need one still) AF meter, boost, on the dash and turbo oil psi and fuel psi on the side.
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The wiring is every where in these photos but I'm cleaning it up. The turbo oil pump, power commander, electric fan and relay, all the extra gauge lighting along with majesty/Zuma crossing.

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Hoses too. Love this picture of the turbo oil heat exchanger.
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I have a bit more fab work on some fittings to oil the turbo, building my intercooler scoop and still have to do the fuel system mods. Adding a new outlet in the tank for fuel return after I install the boost reference regulator. I'm going to run it with no plastics first to look for leaks and line out any issues. Ill test all my systems 1 by 1 and then start get familiar with the power commander.


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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Mon Nov 18, 2013 7:56 am 
Nice progress! Can't wait to see the intercooler scoop!

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mnnthbx wrote:
He's running our pipe. Either it made too much power and spun the rear, or was so loud he went blind and crashed.... 50/50.


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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Tue Nov 19, 2013 9:04 pm 
I have no idea where to start on tuning. No idea how a turbo fuel table ramps compared to stock. I'm guessing lower rpm and throttle positions including cruising throttle position are close to stock. Just way richer at higher throttle position on boost?
I have 32psi fuel stock. I'm starting with 5psi more fuel pressure than stock on the stock fuel map and only 3psi of boost. Just do a small pull and see how lean it goes and adjust from there. Any input be awesome. 1-1 boost reference regulator too so no pressure drop. Planning on 6-8psi with 50/50 110 and 93 fuel by the end.


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Habitual Offender
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Tue Nov 19, 2013 11:15 pm 
Search online for a map for the turbo used. I vaguely studied turbos in school but if I do recall there's a map for size turbo used and cc's of the engine. I'd imagine sticking to that would get best results and safe. There's a formula to calculate ideal boost pressure at certain rpm for size turbo but I don't remember it.

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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Wed Nov 20, 2013 12:05 am 
I have the boost on lock down. I'm talking fuel table.


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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Wed Nov 20, 2013 1:54 pm 
So close. Pulling the intercooler scoop on in a bit.

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Needs Training Wheels
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Wed Nov 20, 2013 6:47 pm 
Intercooler scoop started. Ill box it in and paint some tomorrow.

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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Wed Nov 20, 2013 8:25 pm 
:popcorn: :popcorn: :popcorn: :popcorn:

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Junior Mint
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 Post subject: Re: Zuma 125 with turbo majesty 400 motor
PostPosted: Fri Nov 22, 2013 1:44 am 
Pmd

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