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 168 Posts Member #: 9709 Advanced Member Cirencester, glos |
29th Feb, 2012 at 12:06:30am
Hey guys first question is I have either a mpi or spi fuel tank and how do I tell the difference?
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 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
29th Feb, 2012 at 07:31:34am
The mpi tank has a load of insulation on the outside of the tank and is foam lined, the spi isn't.
On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it 
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
29th Feb, 2012 at 08:08:42am
On 29th Feb, 2012 Rickus said:
Second I have wired it direct to a switch with an inline fuse which means its constantly pumping when the switch is on. Most cars I know of prime then cut out untill the car is running. That is just a feature of modern fuel injection systems because it's dead easy to implement with the engine management system ECU. If you want to replicate it, the early Golfs and Escorts that had the very early mechanical K-Jetronic injection system, had a special relay that would prime the system then stop and wait for a signal from (I think) the coil that the engine was running. TBH, I would wire it as Andy says and get in the habit of not turning the ignition switch on until you want to start the car. One thing I would add though, is an inertia switch. Schrödinger's cat - so which one am I ??? |
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168 Posts Member #: 9709 Advanced Member Cirencester, glos |
29th Feb, 2012 at 08:47:39am
Ok brill guys. My tank is an spi so I take it that's ok?
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
29th Feb, 2012 at 08:59:10am
On 29th Feb, 2012 Rickus said:
What's an inertia switch? Incase of accident it cuts fuel off by the inertia force generated at a guess Yes, I should have called it an inertia cut-off switch. Breakers yard or ebay, ie http://www.ebay.co.uk/sch/i.html?_from=R40...-All-Categories The Rover ones are nice and easy to mount, and easily spotted in a breakers, on the later Metros they are in the engine bay. Schrödinger's cat - so which one am I ??? |
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1226 Posts Member #: 9271 Post Whore Stoke on Trent |
29th Feb, 2012 at 09:47:23am
I was driving home from work one night and stopped to help a mate who was broken down at the side of the road after hitting a pot hole, it was the switch that needed a quick press. but if you don't know what your looking for it would be an expensive thing after paying to be towed away to a garage etc. one day boost will be mine!
On 10th Mar, 2012 Joe C said:
TBH peple stick it everywhere... and theres merits to each... |
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16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
29th Feb, 2012 at 10:34:07am
Spi is only ok for low boost. they don't pump as much fuel as the mpi pumps On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it
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Site Admin  15302 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
29th Feb, 2012 at 10:35:16am
It is pressure that is the limiting factor on the SPI pump, not flow.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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168 Posts Member #: 9709 Advanced Member Cirencester, glos |
29th Feb, 2012 at 11:26:30am
With the pressure given by an spi pump wat boost range can I use? The pressure shouldn't be an issue though should it as its running through a regulator
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 3673 Posts Member #: 9300 Post Whore Quarry Bonk |
29th Feb, 2012 at 11:38:27am
The spi pump will supply a bar of pressure, so 14psi. Take off your 4psi base fuel pressure as it has to be more than boost pressure to be able to supply fuel.
On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!! 17.213 @ 71mph, 64bhp n/a (Old Engine) |
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168 Posts Member #: 9709 Advanced Member Cirencester, glos |
29th Feb, 2012 at 11:44:42am
Well for the purpose of running in I'm only using standard boost so it will be fine for that when the can is run in I will get a mpi pump and drop that in.
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 10023 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
29th Feb, 2012 at 12:13:14pm
I think the SPI pump can manage 15psi so for safety no more than 10psi boost. If something is worth doing, it's worth doing half of. |
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 1492 Posts Member #: 9468 Post Whore Wootton Bassett |
29th Feb, 2012 at 12:29:13pm
10psi is what im aiming for so my spi tank should be ideal, can you just drop the mpi pump inmif I want to upgrade at any point?
On 10th Mar, 2012 theoneeyedlizard said:
Hypothetically speaking, where would you stick your nozzle? On 22nd Jun, 2012 apbellamy said:
my wife doesn't know what.head is never mind compression ratio. |
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10023 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
29th Feb, 2012 at 12:53:07pm
On 29th Feb, 2012 Craigie-B said: 10psi is what im aiming for so my spi tank should be ideal, can you just drop the mpi pump inmif I want to upgrade at any point? Cheers 
YES! If something is worth doing, it's worth doing half of. |
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