"Fat Boy" 12/118 thrust engine

[smithy1]

May 10, 2016 23:02:04 GMT -5 racket said:

Hi Chris

The speed controller for the fuel pump arrived this morning www.motiondynamics.com.au/12v-48v-50a-internal-case-model.html , I'll do some experimenting on the weekend with it hooked up to the 24 volt starter batteries.

Have made contact with the local distributors for a decent tach www.jaquet.com/site/assets/files/1201flyer_turbotach_a4_en.pdf/ hopefully they'll come up with a suitable unit .

And I've ordered a limit switch for the starter engagement so no more stuffups there , its gotta be engaged otherwise no power to the starter , and as soon as it starts to move out of engagement power will be cut.

LOL...........I'm enthused

Cheers
John

Nice mods....I like the tach idea too...I should do the same to the "Beast" as I'm having the same "sunshine" issues as you. Be sure to let me know when you source a decent unit and I might get the same unit.

Cheers,
Smithy.

[racket]

Hi Smithy

The contact is Carlo Foligni [e-mail] at Micromax www.micromax.com.au/

Cheers
John

[Deleted]

May 11, 2016 15:04:13 GMT -5 smithy1 said:

May 10, 2016 23:02:04 GMT -5 racket said:

Hi Chris

The speed controller for the fuel pump arrived this morning www.motiondynamics.com.au/12v-48v-50a-internal-case-model.html , I'll do some experimenting on the weekend with it hooked up to the 24 volt starter batteries.

Have made contact with the local distributors for a decent tach www.jaquet.com/site/assets/files/1201flyer_turbotach_a4_en.pdf/ hopefully they'll come up with a suitable unit .

And I've ordered a limit switch for the starter engagement so no more stuffups there , its gotta be engaged otherwise no power to the starter , and as soon as it starts to move out of engagement power will be cut.

LOL...........I'm enthused

Cheers
John

Nice mods....I like the tach idea too...I should do the same to the "Beast" as I'm having the same "sunshine" issues as you. Be sure to let me know when you source a decent unit and I might get the same unit.

Cheers,
Smithy.

Good to see some safety in design work happening there LOL
It does get a tad busy when everything is happening very quickly
Just shows us that we are getting a bit slower too

Im glad that to see that your back on the horse so to speak.....still need something to put that thing on
your favorite hobby's ,fishing and jets mmmm.......

cheers Chris

[racket]

Hi Chris

LOL..............I've got more to learn about fishing though ;-)

Cheers
John

[smithy1]

May 12, 2016 2:13:03 GMT -5 racket said:

Hi Smithy

The contact is Carlo Foligni [e-mail] at Micromax www.micromax.com.au/

Cheers
John

Thanks muchly John....I'll get onto it soonish. It's not urgent though as the P2 gauge gives a good indication of what's going on...however, like you, I prefer to know what rpm I have during start as it takes a bit of the guesswork out of the equation. Would be nice to have a good stable rpm reading though.

I find the optical sensor works fine during starts as the start blower nozzle covers the inlet of the "Beast", it's dark inside and there's no "sunshine" issues....as soon as I remove the blower though, the rpm indication starts playing up as you've found with your setup....during night time runs or when it's overcast it appears to work reasonably well....

Cheers,
Smithy.

[racket]

Hi Smithy

Yep , a decent tach would be nice , though I'm having trouble understanding what they are offering and how to set it up , I guess theres not much call for turbo tachs here in Oz, so even the distributor doesn't know what to sell me

On the fueling side , I've hooked up the PWM to 24 volts and it really gets the fuel pump humming once I crank up the power to it , with the "normal" 40psi prestart setting on the fuel control valve, the pump can easily produce 80 psi through it, so I don't think I'll have any full bore fueling problems .

The one "problem" I'm having is with the Hobbs switch controlling the relay for the PWM , the current Hobbs is a "normally closed" unit , but because I'm running 12volts to activate the relay from the ancillories battery but 24 volts through the relay from the starter batteries , I can't use my old wiring system , so a "normally open" Hobbs is on order for cutting out the fuel pump relay if oil pressure is below 45psi.

Once the limit switch arrives I get onto mounting it on the starter mounting "spider" and wire it into the starter toggle switch circuit.

Cheers
John

[turboreno]

John, perhaps for a turbo tachometer you could use an eddy current probe that counts the number of compressors blades. You have to drill the compressor shroud to install the probe. They have been very expensive in the past but recently have been advertised for $15.00 US on eBay. For example, "New Speed Sensor For Mopar Dodge Ram Cummins Diesel 6.7L Turbocharger Turbo". You can use a digital multimeter with a frequency setting to get the rpm.


Thanks, Ron

[Johansson]

May 14, 2016 9:51:30 GMT -5 turboreno said:

John, perhaps for a turbo tachometer you could use an eddy current probe that counts the number of compressors blades. You have to drill the compressor shroud to install the probe. They have been very expensive in the past but recently have been advertised for $15.00 US on eBay. For example, "New Speed Sensor For Mopar Dodge Ram Cummins Diesel 6.7L Turbocharger Turbo". You can use a digital multimeter with a frequency setting to get the rpm.


Thanks, Ron

The problem is that it takes 8 blades passing the probe for it to register a pulse, so with my X846 compressor with 14 blades I need to use a 1.75 scale factor to get the correct rpm reading.

The Auber ASL-62 that I use as the tacho display can scale the pulses and has two relay outputs that can be programmed to open/close at a set rpm, very useful for starter motor disengagement when idle is reached, over rev safety etc.

[racket]

Hi Ron

That might be a solution to my needs :-)

Thanks for the recommendation , having checked one out on Ebay it looks like theres the sensor then theres a lead to a "plug" is that just a connection piece to the autos wiring harness or as with the Jaquet unit a signal amplifier ??

Cheers
John

[turboreno]

John, I believe it is just a connection. If you Google Borg Warner turbo speed sensor there is info on hook up and the connector, etc.

Thanks, Ron

[racket]

Hi Anders

You'll need to recalibrate your tach when you go from the TV94 to the X846 comp wheels , the TV94 with 7+7 blades vs the X846 with 8+8 blades ............bummer .

Am I reading you correctly when you mention the need for 8 blades passing the Dodge probe to register a pulse, if so that'd be OK for the X831 wheel with its 8+8 blades, just position it to read the full blades...........if so then it'd be OK :-)

Cheers
John

[racket]

Thanks Ron , yep , starting to understand , I'm not good with electronics :-(

[dieselguy86]

Why doesnt anyone use garretts turbo speed gauge? I know its pretty pricey but its "plug and play" so to speak.

Its programmable from 1 blade (flat spot on the hub uses this setting) to 16 blades.

Other than being expensive it seems to be the best option.

-Joe

[madpatty]

May 14, 2016 9:51:30 GMT -5 turboreno said:

John, perhaps for a turbo tachometer you could use an eddy current probe that counts the number of compressors blades. You have to drill the compressor shroud to install the probe. They have been very expensive in the past but recently have been advertised for $15.00 US on eBay. For example, "New Speed Sensor For Mopar Dodge Ram Cummins Diesel 6.7L Turbocharger Turbo". You can use a digital multimeter with a frequency setting to get the rpm.


Thanks, Ron

Hi John and Ron,

Beware.

That cheap ebay sensor is variable reluctance sensor and not Eddy current probe like borg warner's.

That sensor measures a small flat machined on the turbine shaft.

Check this thread jetandturbineowners.proboards.com/thread/817/pressure-sensors-transducers and post by parallaxattack.

Cheers.

[racket]

Hi Joe

Yeh , the Garrett unit is a tad pricey , also the gauge is a bit small for development work where a finer display of rpm is wanted.

Cheers
John