Boost Pin

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Zednero

New Member
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269
Location
Wiltshire - Southwick.
So yesterday i fitted my new boost pin, and have to say so far, it's made a remarkable, and notable difference.

As an example..... There's a straight by me, that is around 1.5 miles long. Takes me normally ¾ the way down, before i can hit 60mph.

Yesterday, i wasn't even halfway at 70mph.

Can't say i've noticed fuel decrease yet, as i've not had it in long enough :)

Nice and quick 15 minute job too :)

(Oh and no smoke now, either!)
 

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Zednero said:
So yesterday i fitted my new boost pin, and have to say so far, it's made a remarkable, and notable difference.

As an example..... There's a straight by me, that is around 1.5 miles long. Takes me normally ¾ the way down, before i can hit 60mph.

Yesterday, i wasn't even halfway at 70mph.

Can't say i've noticed fuel decrease yet, as i've not had it in long enough :)

Nice and quick 15 minute job too :)

(Oh and no smoke now, either!)
Click to expand...


Can you give us all you know about this, it sounds very interesting.

Dave
 
There's a bloke called Morgan Hill that originally started making them but I think there is a few people that are making them now. Had you already tweaked your pump? Tempted to get one myself.
 
Not a personal design, no. If it was, i'd be cashing in big time! :lol:

First started, i believe by a swedish guy, who was developing it, and started selling it.

Stupidly it seems he didn't patent the idea, and now many other places have copied it (Easy to make) and are making a dime off of it.

Cost me £50 delivered, though prices have now gone up, as the Swede has gone out of stock. Got mine from Timber trail 4x4.

Typically people have reported gains of between 25-30%, and is currently being sold as a performance pin. Idea being that is gives you more BHP and torque.

From what i can tell, it allows more movement in the Governor and therefor more power to your car.

When fitting, your fuel pump has to be as standard. And you remove the nylon washer, and just simple switch out the old pin, for the new.

There's also talk of another being developed, by other UK companies, to allow even more power.... But only time will tell on that.

Some people have reported some black smoke when fitting them, and the advice given, is rub down the nylon washer, to around half it's original size and place it back in.... But only recommended if there is black smoke.

I'm curious as to whether you could tweak this further yourself, but tuning your pump? (Haven't braved it yet though, as this works so much better than original tweak imo)
 
So the pin controls the fuel advance for on boost conditions. It basicaly provides a fuel trim "curve" as opposed to a violent on/off boost control. By modifying the pin, you are changing the way the extra fuel is added, and how much is permissible.

Sounds like a good mod to make. I realise its nothing new. But perfecting the shape of the pin so the turbo doesnt spike too hard, and or providing more fuel than the air availible can burn will be the key. (If you want to be really technical)

A modded pin, adjustments to the diaphragm and the other settings (max fuel, timing and idle) should really give excellent power across the range of revs on reletivly low boost, and getting possibly netter than std mpg.

I might have to buy one and also get a couple of standard ones to try different shapes.

:clap2: good work that man!
 
how are you finding the new pin after a while of driving.

Can you get better mpg if driven gently, more useable power?
 
Well, so far, MPG seems to be around the same so 30 or so on average. Surprising, as i've been trying to see what i can get out of my pin quite a few times!

I've noticed if i whack my foot down in 2nd, and floor it, i get a puff of black smoke, which soon disappears. (Could be solved with rubbing down nylon washer and putting back in, i suppose)

Have managed to get 90mph, quite easily, without waiting 30mins to get that fast :lol:

Overall, torque seems better and more BHP. Accelaeration not so much, as you don't notice it until turbo kicks in, around 2k revs. :)
 
As to tweaking the pump you take the diaphram out with pin attached and turn the pin around a d the cog inside gets turned aswell.

Looking at the pin in the main picture it is flush from bottom to top so fitted wrong way it would be guttless id assume.
 
I've done the fuel pump mod bar the final one on the back of the pump. I've had great results all round from this apart from a bit smoke and running a little rich. But good power, torque and mpg. I'm interested in this pin but I think it performd most of the same function s as the mod albeit more refined. I would hate to find I've spent £50 + on a pin to find it's just the smae as a pump mod.
 
haigy said:
As to tweaking the pump you take the diaphram out with pin attached and turn the pin around a d the cog inside gets turned aswell.

Looking at the pin in the main picture it is flush from bottom to top so fitted wrong way it would be guttless id assume.
Click to expand...

It just woulnt work
 
Discophil34 said:
I've done the fuel pump mod bar the final one on the back of the pump. I've had great results all round from this apart from a bit smoke and running a little rich. But good power, torque and mpg. I'm interested in this pin but I think it performd most of the same function s as the mod albeit more refined. I would hate to find I've spent £50 + on a pin to find it's just the smae as a pump mod.
Click to expand...

+1 on all of that.
Am also wondering how this mod would compare to a tweaked pump and if it's even worth doing.
 
The point of the boost pin is to provide a deeper 'slot' for the fuel pin to slide in and out of, with a slightly different angle so it's smoother too. It doesn't affect the star wheel, and indeed works best when all pump settings are returned to standard!

A standard pin can only be adjusted so much, and not give as good results simply 'cos the fuel pin can't go deep enough, and is a case of suck it and see, and keep adjusting till you get it right, so can be fiddly .. though it's not hard to see how the pin should be placed for best effect, once you understand the operation.

For £55 + I'd make my own .. ;) A pin is easy to make, the slot can be easily milled out with a decent milling machine, or mate with a workshop!! Heat treat afterwards so you get a good surface hardness and job's a good 'un. I'm not totally convinced that using a decent hardness material to start with would need hardening either ...

If they were £25 - £30 I'd say it's worth it to buy one .. and wouldn't hesitate.
 
Totally agree with paul that 55 quid is tad expensive on a suck it and see wim.

Ive looked at the ron box which is a tune box and 144 quid seems good price.

Alot of the info and advice ive found shows the turbo needin adjusting for the pin to be fully effective
 
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