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Old 09-28-2006, 02:48 AM   #1
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hello all, i am wondering if i can hit 10psi with the bipes acu and 1.8 injectors. i also have a jackson racing afpr... please help me!
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Old 09-28-2006, 03:09 AM   #2
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Also got an intercooler?
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Old 09-28-2006, 03:13 AM   #3
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yeah here are the parts. greddy kit, starion kit, bailey bov, 1,8 and supra injectors, jr afpr. could i make 10psi with the bipes and this? would i need a fuel pump?
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Old 09-28-2006, 04:14 AM   #4
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You'll need a fuel pump for sure. And I would suspect that 10psi on your configuration would be on the ragged edge. Can try it, and always turn down the boost if things become a problem. I'd get on a dyno if you are running that much boost to confirm your A/F.

Good luck.
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Old 09-28-2006, 04:40 AM   #5
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any recommendations on fuel pump? so would 8 and 9 psi work just fine?
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Old 09-28-2006, 04:41 AM   #6
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1 more thing, which would be a better injector? my 1.8s or my green top supra injectors? because im just gonna sell off the injectors i dont need and my emanage blue. dont want to go through all the tuning hassle...
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Old 09-28-2006, 09:55 AM   #7
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uhhhhh, keep the EMB and the 305s, get a fuel pump and your on your way. You could hit +15psi using the piggyback.

But FP is in order.

What is the rise on the JR AFPR, that may need to be replaced....
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Old 09-28-2006, 09:59 AM   #8
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The oem fuel pump and 1.8 injectors won't be safe over 8psi boost
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Old 09-29-2006, 02:42 AM   #9
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well, what fuel pump should i get? i'd love to use my emanage, but all this tuning, is making me not want to do it :( but hey, i love boost!
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Old 09-29-2006, 01:29 PM   #10
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I'm very happy with the 190lph HP
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Old 09-29-2006, 02:57 PM   #11
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Quote:
Originally Posted by olderguy View Post
The oem fuel pump and 1.8 injectors won't be safe over 8psi boost
what about 1.8 injectors with a 190 HP FP?
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Old 09-29-2006, 03:08 PM   #12
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10 psi is doable with 1.8's and 190lph HP. You will need good fuel pressure and rise control to do it.
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Old 09-29-2006, 03:17 PM   #13
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You're still closing in on the max PSI levels. You'll need close to 120psi of fuel at 8psi. Anything above 100psi in the rail is frowned upon. With my 1.8L injectors and the OEM fuel pump the max I could reach was 160rwhp @ 5-6psi. Anymore boost and the AFR was too lean. This is due to the fact that the OEM pump can only provide enough flow to around the 75-85psi range.

A 190HP can provide adaquite flow up to the 110-120psi range. So you should be able to push the envelope with 1.8 injectors, at the cost of high fuel pressure.

One easy way to eliminate this is the use of even slightly larger injectors. Since at lower PSI levels they can flow more fuel. I'm utilizing 305cc injectors and running them at 100psi of fuel. This allows me to reach upwards to the 9-10-11-12psi range without the use of a controller. Since 305cc injectors at 100psi of fuel can supply enough flow for about 220rwhp.

The use of a fuel controller such as the Emanage can allow you to change your maps, pulses, etc. So you can run to the 12-15psi on 1.8 injectors.
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