Fuel System for Supercharged 1275
Turbo Mini Forums

I've done a quick search and managed to completely confuse myself

I'm going to be fitting a SC12 Supercharger, running about 12 PSi, to a 1275 to go in my clubby (old hat, I know ) and am trying to get the fuel system sorted in my head.

I need to keep a constant 3 Psi at the carb, so I have a standard SPi tank & pump and a filter king preasure regulator.

This is what I've read and got confused:

http://www.turbominis.co.uk/forums//index.php?p=vt&tid=4773
http://www.turbominis.co.uk/forums//index....p=vt&tid=118994
http://www.turbominis.co.uk/forums//index....p=vt&tid=187576

and these are my questions:

Will this setup be OK?
There is no return from the F.K., will I need one?
What type/size and how many fuel lines do I need to run?
If I only need the feed and not the return, what should I do with the return etc on the pump in the tank?
As it's suck through, rather than blow through, do I need to rebuild my carb with a Turbo kit?

If you are running a suck-thru setup then the fuel system can be the same as NA.

If you are running blow-thru, like most turbo setups, then you need 3 psi above boost pressure fuel supply which needs different pump, regulator and a return.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

As above, the setup for your blow-through is the same as an NA system.

The SPI pump will make 15psi. If it was me I'd use a pump that make 5 or 6psi, as lonf as the flow rate is ok.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

Thanks

For the pipes, I'm guessing 8mm copper from the outlet of the tank to the regulator. Then 8mm hose from the regulator to the carb inlet. Then run the carb over flow back to the return on the tank and breather the pump like a normal carb tank

Your return needs to come off the regulator.

If the FK regulator does not have a return, then it is not compatible with the SPi pump.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

How about using a Metro Turbo FPR and just not utilising the boost sense feed?

If something is worth doing, it's worth doing half of.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

How would you block off the boost feed? bit of pipe and a bolt?

Leave it open to atmospheric pressure.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Would something like this do the job with a descent filter before it?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...em=380090845563

EDIT: helps if I put the link on...

Edited by apbellamy on 13th Jan, 2009.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

OK. Thanks. I think I know where there is one of those going spare...

i'd just use a facet red top for effectively a NA installation

I've already got the SPi tank and I think I can negotiate a fair price for the regulator. Should also be able to sell the filter king (on TMF ). So I'm pretty much sorted now. I might even have enough copper pipe knocking around...

just more fuel lines and things to go wrong over a redtop setup. the spi tank would pay for a new red top.

anyway, there is more than one way round it so you have options now

I think I've got my options straight on the fuelling now, but has anybody suggestions about this one?

I run this setup and use a Solid State Electronic Fuel Pump like this one
http://www.demon-tweeks.co.uk/products/Pro...&pcode=FSE40105

with a standard N/A tank. I used a simple regulator. I believe with a 12PSI you may need to run a high flow float needle in the carb. as there has been a report of the carb runing out of fuel at full chat on ausmini.com

I use a N/A carb that has been rebuilt to get rid of any setup issues due to worn parts. will have to be a HIF carn as the manfold holds it upright. However I might be inclined to use a bike carb next time to help with an carb service as getting to the carb once its installed its very hard.

Edited by gr4h4m on 13th Jan, 2009.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

oh andthe maker of the kit was saying at 12psi the intake temps were getting higher so was using water system to help cool them

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

I've got a couple og HIF44's, so I'll put a standard rebuild kit on one of those.

How is he water cooling it? Through the manifolds? or a water spray? Interesting...

Not sure I think its via the carb intake, I found an old post send him a PM and I'm sure he will reply

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

I'll get in touch when I'm a bit nearer ordering the kit.

I have an sc12 running 7psi on a 1275, standard mech fuel pump and hasnt run out of fuel yet, though im planning on going to a electric pump soon as car is off the road for a little while due to worn clutch

Keen to hear about the water injection setup also as i want to up the boost (when i have a better fuel supply) aquamist kit here in nz sells for $1000 which is a bit pricey for me

You are aiming for 12psi out of an SC12? That is pretty ambitious. Going suck through will up the sealing of the rotors a tad, it's not going to like 12psi though.

Have you got the blower yet? I know they are cheap.... but Mazda do a lysholm blower which is much more efficient and will fit under your clubby front.... is also cheap...

Bugger off, I'm getting there.

ah no the 12 is 1.2L the 14 is 1.4L per rotation