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 8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2010 at 08:16:00pm
On 28th Feb, 2010 Andy500 said:
Was thinking about the pressures myself earlier as ive just fitted a new pump to my mpi. I run the injectors at 2 bar (as originally set by Stuart Gurr) and they sit pre charger so dont experience boost pressure. The Haynes BOL says the standard fuel pressure for the mpi is 1 to 1.3 bar! So wouldnt that mean that the spray would be ok on these injectors down to 1.0 bar? Firstly Haynes is incorrect. The MPi runs at 3 bar. I would imagine that Stuart Gurr reduces the pressure because the MPi injectors are very big for the port injection, which you do not need if injecting pre-charger. Personally, I would fit some smaller injectors rather than reduce the pressure. Otherwise you will be dribbling. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 869 Posts Member #: 2443 Post Whore Cheshire |
28th Feb, 2010 at 08:20:45pm
Will a dribble be a problem if injected pre charger? would the charger help to minimise any effect of large droplets of fuel. Getting to 3 bar is easy enough but i dont fancy another blimin trip to emerald for a remap. Edited by Andy500 on 28th Feb, 2010. |
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8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2010 at 08:32:51pm
I don't know, but I would avoid anything that would cause any inconsistancy in the fueling, such as large droplets that may puddle in the inlet. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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869 Posts Member #: 2443 Post Whore Cheshire |
28th Feb, 2010 at 08:35:00pm
Good point, anybody know what injectors would be suitable then? I would need them to be the same dimensions as the standard mpi ones really? |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
28th Feb, 2010 at 09:27:26pm
What is the duty cycle of your injectors at peak torque and peak HP?
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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869 Posts Member #: 2443 Post Whore Cheshire |
28th Feb, 2010 at 09:36:34pm
Im pretty sure that the injector duty never goes above 50% ! it had Dave Walker a little dumfounded at one point as it couldnt get enough fuel through and icreasing the injector duration made f all difference - hence ive now changed the pump to a higher capacity one. |
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