MAF and fuel pressure problems

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09-19-2010, 11:20 AM

#61

ptuomov

Nordschleife Master

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Quote:

Originally Posted by Bill Ball

Tuomo: I don't think the lack of a flush step in the ends of the silcone boot does anything measurable to flow, especially under boost and considering all the other lips and irregularities in the intake. Look at the way the throttle housing fits to the manifold.

Poorly coming from the factory, well after being ported! ;-) They should match, if the intake is out why not match the two?

One thing that I am very much unsure about is the lip in the top of the throttle body just after the throttle plate. That's on the short side of the turn, so it's not obvious to me whether one is better off leaving a rough lip there or whether one should smooth it out. It might be an intentional vortex generator or an accountant's decision...

Quote:

Originally Posted by Bill Ball

BTW, I think George and I have some good ideas as to why he is heating the fuel and losing fuel pressure after having the system looked at by an FI pro at the Silver State Classic, but we won't know for sure for a while.

Keep us posted. Since the system is heating the fuel and can't match the boost pressure 1 for 1, there are some problems there. Given that it's boiling fuel, it makes a lot of sense that a pro is looking at the entire fuel circulation system.

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