Spark plug booster kit... sceptical but.....

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farmerboy
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Spark plug booster kit... sceptical but.....

Postby farmerboy » Tue Apr 11, 2017 12:50 pm

I have just spotted this from Motorworks and it seems too good to be true... 20% more power?????

An innovation from Scriminger Engine Developments. At Motorworks we avoid gimmicks but the pulse jet ignition modification really does the job. The spark occurs inside a small chamber screwed into the normal spark plug hole in the head. When the gases in the chamber are ignited by the spark plug the burning gases then exit at high speed through several holes in the chamber making ignition of the main body of gas much quicker and more thorough.

10 to 20 percent more power
Better economy
Smoother running engine

read more...
Tried and tested on dynometers and on the road the booster kit is well proven. We have tested it ourselves with good results.
The overall dimensions of the insert and smaller plug are the same as the conventional plug so there are no compatibility issues.
Widely used in classic racing.
Because of the rapid burn it is usually necessary to retard your ignition by 2 or 3 degrees to optimise running.
Spark plug included and also available seperately to insert.
NOTE Price is per cylinder so order two for one twin cylinder bike. On twin spark models of the 8v R1100s and R1150s only the centre plug is replaced so again just two kits per bike.


http://www.motorworks.co.uk/vlive/Shop/ ... c-91237375
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Re: Spark plug booster kit... sceptical but.....

Postby mike pace » Tue Apr 11, 2017 7:44 pm

Bump

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Re: Spark plug booster kit... sceptical but.....

Postby Tango » Tue Apr 11, 2017 7:55 pm

:cheers: Was going to comment, but not tried these things so I have nothing to say, but at least you can have another free bump :cheers:
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Re: Spark plug booster kit... sceptical but.....

Postby farmerboy » Tue Apr 11, 2017 8:36 pm

I am still trying to work out the physics of how it works? Surely all manufacturers would know about such a simple device to gain 20% more power!
Come on ..... someone buy a set and put me out of my misery!
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Re: Spark plug booster kit... sceptical but.....

Postby george baker » Tue Apr 11, 2017 8:42 pm

hi
i am sure i remember 30 years ago Putting a shirt button in the middle of an ht lead to boost the spark

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Re: Spark plug booster kit... sceptical but.....

Postby farmerboy » Tue Apr 11, 2017 8:47 pm

I bet it is still in there George!
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Re: Spark plug booster kit... sceptical but.....

Postby Tango » Tue Apr 11, 2017 8:59 pm

I would give it a go, but I find the incredible amount of power developed in the 800 airhead far to much to handle in standard form.
However I think it would be a useful addition to the 160 bhp that is available in this Yamaha lender that I have been fobbed off with. Maybe a quick email to Japan would get things moving.
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Re: Spark plug booster kit... sceptical but.....

Postby milleplod » Tue Apr 11, 2017 9:35 pm

Hope it works better than their website - has Scriminger closed down? :???:

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Re: Spark plug booster kit... sceptical but.....

Postby King Herald » Wed Apr 12, 2017 9:58 am

It works so well to give free extra power that all racers and sports cars manufacturers use them.... don't you know. :---)
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Re: Spark plug booster kit... sceptical but.....

Postby Mike D » Wed Apr 12, 2017 1:04 pm

has Scriminger closed down
Yes, due to ill health.

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Re: Spark plug booster kit... sceptical but.....

Postby farmerboy » Wed Apr 12, 2017 2:35 pm

That explains the lack of a website.. still intrigued by the booster plug thing... Motorworks claim they have tried them and they work...
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Re: Spark plug booster kit... sceptical but.....

Postby King Herald » Wed Apr 12, 2017 5:13 pm

Sounds a bit like the old pre-combustion chamber they used to use on diesel motors.

But seriously, 20% more power from fitting special spark plugs, they'd sell millions overnight if proven to work.
Last edited by King Herald on Wed Aug 09, 2017 9:39 am, edited 1 time in total.
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Re: Spark plug booster kit... sceptical but.....

Postby chasbmw » Tue Aug 08, 2017 10:23 pm

The Dyno charts look as if they are dated 2003 and 2015, so not exactly a back to back test. Judging by the power outputs the tests are on a 1100 or a 1150. Happy to Carry out a proper test, please send PayPal contributions for the £120 + vat cost to my email!
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Re: Spark plug booster kit... sceptical but.....

Postby King Herald » Wed Aug 09, 2017 9:39 am

The Dyno charts look as if they are dated 2003 and 2015, so not exactly a back to back test. Judging by the power outputs the tests are on a 1100 or a 1150. Happy to Carry out a proper test, please send PayPal contributions for the £120 + vat cost to my email!
I can also sell someone a nice bridge in London..... \:D/
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Re: Spark plug booster kit... sceptical but.....

Postby chasbmw » Fri Aug 11, 2017 4:50 pm

There is a web page.........shows a dyno chart for a R75/7. chart is not that informative, no BHP and torque figures given, only starts at 4000 rpm, so one should assume that the gadget has no beneficial effect under 4000, benefit clocks in at about 5000 revs..........Could be a a lot, but without a scale who knows.

Toaster Tan who makes some very nice triple clamps is going to do a back to back dyno test.
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Re: Spark plug booster kit... sceptical but.....

Postby alexis291 » Wed Aug 23, 2017 7:49 am

I am still trying to work out the physics of how it works? Surely all manufacturers would know about such a simple device to gain 20% more power!
Come on ..... someone buy a set and put me out of my misery!
I worked in engine development for a number of motor manufacturers and racing teams for nearly 20 years and we never used anything like this. However, that's not to say we weren't always looking for things to improve combustion, which this device appears to do (or at least that's how it's advertised). I expect the reality is that most modern engines (i.e. less than about 30 years old) have got pretty good combustion chambers so it's not very effective, but it could make a difference on a vintage engine where the combustion chamber shape is poor and getting a better burn could improve power and efficiency. So the effectiveness of this device is likely to be engine-specific. The only way to be sure really is to try it.
Pre-combustion chambers (which this appears to be a version of) have certainly been around for a while, and recent news from Mazda is that they have perfected an in-piston version (http://www.mazda.com/en/innovation/tech ... kyactiv-g/) which apparently improves engine efficiency by 15%.


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Re: Spark plug booster kit... sceptical but.....

Postby King Herald » Mon Aug 28, 2017 7:48 am

It wouldn't take the manufacturer or vendor much time or money to simply do a couple of back to back dyno runs with the same bike, on the same day, with and without the device. You could probably get legitimate date for less than £100 like that.

To not do that, and to simply tell people how well it works, indicates something is amiss, surely?
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Re: Spark plug booster kit... sceptical but.....

Postby gogs01 » Mon Aug 28, 2017 1:03 pm

It wouldn't take the manufacturer or vendor much time or money to simply do a couple of back to back dyno runs with the same bike, on the same day, with and without the device. You could probably get legitimate date for less than £100 like that.

To not do that, and to simply tell people how well it works, indicates something is amiss, surely?
So I'm not the only sceptic then ?.... :grin:
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Re: Spark plug booster kit... sceptical but.....

Postby chasbmw » Mon Aug 28, 2017 3:12 pm

http://www.pulse-jetignition.co.uk

This is the website and the synopsis chart I referred to earlier
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Re: Spark plug booster kit... sceptical but.....

Postby King Herald » Mon Aug 28, 2017 10:32 pm

Are there supposed to be links on that page? I just see three pictures.

Exactly how or why a jet of blue flame would shoot out of that device is beyond me.
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Re: Spark plug booster kit... sceptical but.....

Postby Mike D » Mon Aug 28, 2017 11:17 pm

The rest of the info is via the headings on the page - 'The development', The proving Ground, The Evidence (as such).

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Re: Spark plug booster kit... sceptical but.....

Postby CaptAirhead » Mon Aug 28, 2017 11:44 pm

Are there supposed to be links on that page? I just see three pictures.

Exactly how or why a jet of blue flame would shoot out of that device is beyond me.
I think what happens is that on the 'suck' stroke, the petrol vapour fills the combustion chamber. On the compression stroke, some of the vapour is forced into the device through the 'jet' holes. The spark ignites the vapour in the device which then shoots the flames into the main combustion chamber igniting the rest of the vapour. I believe the ignition must be adjusted to fire slightly early to compensate for the slight delay. It is similar in function to a percussion cap setting off the main charge in a cartridge except that that this device is recharged on every compression stroke and ignited by the spark plug. I think the extra power comes from providing a cleaner, more complete burn to a less than perfect combustion chamber design which is why ( it is said!) it works better on older vehicles.
I think the principle is sound but I am waiting for somebody else on this forum to spend the £120 to find out if it works in practice.
Ian.
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Re: Spark plug booster kit... sceptical but.....

Postby CaptAirhead » Tue Aug 29, 2017 12:14 am

This is the Dyno run claimed as evidence by the manufacturer of the Pulse Jet Ignition system. The bike tested was a was fitted with a 980cc Race engine and a 20% improvement in power claimed:-
ImageBMW Dyno Run for pulse jet ignition. by Ian Beat, on Flickr

This is a claimed dyno result on a 1978 BMW R75/7. 10% improvement in power and torque is claimed.:-
Image1978 R75_7 Dyno with Pulse Jet Ignition. by Ian Beat, on Flickr

The blue trace is standard ignition. The red trace is with the device fitted.
If these results are accurate ( and factual) it would seem best results are from mid range upwards with little improvement at lower revs.
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Re: Spark plug booster kit... sceptical but.....

Postby chasbmw » Tue Aug 29, 2017 9:01 am

That first dyno chart is of a full race engine.......

The second chart is from a normal engine and shows very little improvement from stock (difficult to EE as they have cut out the BHP and torque figure scales and as the chart also has had removed the results prior to 4000 rpm, I would guess that this means that there was power loss below 4000.... so claiming as Motorworks do that this will produce 10-20% more power is stretching the trades descriptions act.
Toaster Tan had to curtail his back to back dyno test on this gadget due to the test showing up some ignition problems on his bike, hopefully he will do it again, but he lives in the area affected by hurricanes and floods at the moment so he may have other issues on his mid.
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Re: Spark plug booster kit... sceptical but.....

Postby alexis291 » Tue Aug 29, 2017 11:50 am

See also
http://www.motorsportmagazine.com/opini ... t-ignition
This system can work but gains will be engine-specific.


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