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Old 02-23-2019, 05:41 PM
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taff2 taff2 is offline
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Join Date: Sep 2005
Location: South Wales in UK.
Posts: 2,172
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I can only say what Steve Morris told me, these were his words- 'Hey Pual,
I noticed going over your engine info that your running 25PSI of boost.
That's going to be a bit high. The MAP sensor in the sniper is totally
fine to use but typically you start running out of injector around
16PSI. At 25 you will most definitely starve it for fuel. And after I questioned this (why would the system have a 2.5 bar MAP sensor if that is the case? And why do Holley say that an external 3 bar MAP sensor can be used if the system can't run enough fuel for that boost pressure?) ,his reply - 'So the sniper software has a fuel map for volumetric efficiency and flow
rate. These 2 fuel maps max out at 16 psi. So beyond that the sniper is
running into an un-mapped area so it will be relying off of the last
mapped number on the graph and the o2 sensors to try and correct it
regardless of boost level. Its not the most ideal place to run it.