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Old 08-13-2010, 05:46 PM   #151
sebastianp
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A K1300R, supposedly the fuelling was fixed in the 1300 series bikes.
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Old 08-22-2010, 07:53 PM   #152
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After reading all the glowing reviews of the booster plug, I bought one for my 2010 GSA Cam head.

It seems to run worse than without it .
Its rougher and more viby.

Persevered with it for 2500k's and removed, definitely better without it.

Maybe I have a faulty one?

Can someone please tell me the resistance readings that I should be getting at some different temps so I can check it?
A nominal resistance maybe +- deviations?

Or is there an alternative way to check its functioning properly/at all?

I bought this of the local dealer not Jens direct and have the probe mounted in front of the left side of the tank in the cavity near the OEM ambient temp sensor (in front of the fuel pump area).

Thanks

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Old 08-22-2010, 09:16 PM   #153
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Disconnect it and measure its resistance with a digital meter.


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Old 08-22-2010, 09:21 PM   #154
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Quote:
Originally Posted by Poolside
Disconnect it and measure its resistance with a digital meter.

Thats my intention, but does anyone know the correct values?
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Old 08-22-2010, 09:31 PM   #155
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Do you have a digital multimeter?


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Old 08-22-2010, 10:02 PM   #156
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Quote:
Originally Posted by Poolside
Do you have a digital multimeter?

yeah, several

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Old 08-22-2010, 11:43 PM   #157
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I would like to know what the values are supposed to be!

Ive just checked:

The OEM IAT in the airbox measures approx 3.8k Ohms @ 30 degrees C
Boosterplug disconnected @ male end = open circuit
Boosterplug disconnected @ female end = open circuit
Boosterplug connected to OEM plug = open circuit
Boosterplug male end to female end, one pair = closed circuit
*****************************other pair = 7k Ohms

Faulty?

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Old 08-22-2010, 11:49 PM   #158
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I think I've read a few times that the Booster Plug doesn't do much or makes it worse for the new cam heads. Something about BMW possibly changing the fuel mapping for the new bikes.

I don't know what the Booster Plug resistance reading is but the stock IAT sensor on my '06 reads ~10k at 77 degrees F.

Personally I've been running a 50k pot set at ~26K in series with the IAT sensor for a couple weeks. Feels pretty smooth at 4k rpms, seems to have some more oomph both while running and when pulling from a stop. Can't really comment on gas mileage, I was getting 40-50. I like how it is running so if my mileage took enough of a hit then I'll wire in a resistor on a switch so that I can choose between a stock setting and a "power" setting so to speak.
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Old 08-22-2010, 11:56 PM   #159
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Quote:
Originally Posted by 1coolbanana
The OEM unit in the airbox measures approx 3.8k Ohms @ 30 degrees
Boosterplug disconnected @ male end = open circuit
Boosterplug disconnected @ female end = open circuit
Boosterplug connected to OEM plug = open circuit

Im guessing that its faulty huh?
That'd be a fair guess CB. I'd say return it for a replacement.


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Old 08-23-2010, 12:05 AM   #160
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Quote:
Originally Posted by Poolside

That'd be a fair guess CB. I'd say return it for a replacement.

Just measured in line and got some numbers

Boosterplug male end to female end, one pair = closed circuit
Boosterplug male end to female end, other pair = 7k Ohms

So dunno whether thats normal
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Old 08-23-2010, 01:54 AM   #161
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Quote:
Originally Posted by 1coolbanana
Just measured in line and got some numbers

Boosterplug male end to female end, one pair = closed circuit
Boosterplug male end to female end, other pair = 7k Ohms

So dunno whether thats normal
Oh, the resistive element, whatever it might be, is in series. That's one way to do it.

Dunk the probe into a glass of ice water, then into hot coffee, and see what the resistance stabilizes at.


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Old 08-23-2010, 02:09 AM   #162
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Quote:
Originally Posted by Poolside

Oh, the resistive element, whatever it might be, is in series. That's one way to do it.

Dunk the probe into a glass of ice water, then into hot coffee, and see what the resistance stabilizes at.

Even picking it up by hand from 10(ish) degrees @ 15k Ohms, headed south pretty quick and warmed up to about (in my hand) 30 degrees @ 7k Ohms.
The thermocouple seems to be working properly.

Im tending to think now the Boosterplug is fine and maybe just not suited to the 2010's .

I just remembered I know someone with one for sale, Ill contact them and ask them to measure the values and see if its the same.
Get back shortly!
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Old 08-23-2010, 03:05 AM   #163
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The ambient temperature probe I mentioned earlier is the one at the front end of the bike.
The same sensor was on my 08GS and my 07 K12. Its the one that affects the dash temp display. Dont know if it has anything to do with fueling.
That was the location I used for the boosterplug thermocouple as it seems to get fresh air.

Anyway, it appears that its working fine.
My friend just measured his and its behaving the same way.

I just dont think it works well on the 2010 with a stock setup I have.

Ive pulled the battery, do a reset overnight, run standard again for another 5-600 miles and then refit and see what happens.

Value at 0 degrees C (ice water) = 21k Ohms
Value at 100 degrees C (just boiled) = 1k Ohms

Response time is ok 20 seconds to stabilise one extreme to the other.


Soooooooooooo, can someone tell me from this info, is my boosterplug ok?

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Old 08-23-2010, 10:37 PM   #164
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Quote:
Originally Posted by Poolside
Are those numbers just the Booster alone? YES


Based on my numbers it seems a little excessive to me. Perhaps Jens will chime in. IM HOPING

What does your stock 2010 IAT read at 0C/80C/100C?

Dont know, didnt want to stick it in water but at 30 degrees C it was about 3.8K Ohms

.
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Old 08-23-2010, 11:28 PM   #165
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Quote:
Originally Posted by 1coolbanana
I just dont think it works well on the 2010 with a stock setup I have.
By the end of the week I will be able to give an impression on the "Accelerator" with a 2010 GS. I have one here. Can't compare with the Booster Plug though.

But my 2010 runs pretty well without the module, so I'm curious what it actually does. Just wanted to try it and will sell it if the difference is either marginal or not noticeable. I will keep it only if the difference makes it really worthwhile.
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