DIY Turbo Discussion greddy on a 1.8? homebrew kit?
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questions i have from reading DIY FAQ

Old 02-29-2008, 07:38 PM
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Default questions i have from reading DIY FAQ

A very common upgrade is to install the 1.8L injectors. These will should provide you enough room to run about 7-9psi of boost (170-180rwhp).
how much fuel pressure would be required for this?

The 1.6 ECU should be able to idle up to 330cc injectors. However it will require tweaking the AFM idle-mixture settings and spring tension, sorry MAFers.
What can I do with the stock 1.8 ECU? Can I use my BEGi FMU to control the idle mixture settings?

So the 1.8 injectors will be less than 80% duty cycle at 6psi of boost with 96psi of fuel pressure to reach 160rwhp. But what if we add more fuel pressure. Remember that calculation was with a 8:1 ratio. The most aggressive ratio is 12:1.
What is usually optimal for a DD? 10:1?

I guess that's all. I'm sure I'll hear "just buy a MS." Eventually I probably will. For right now I want to focus on getting the car paid off. If I can get away with running my stock injectors for a while with a 190hp fuel pump, or running supra injectors with my FMU and stock ECU then i will.

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Old 02-29-2008, 08:11 PM
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