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Old 08-23-2007, 07:35 PM   #1
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Default begi afpr

quick question?
ive installed the toyota supra turbo black top 430cc injectors on my 1.6 miata. now with those i dont need the begi afpr? right? i searched on rc engineering that i only need about 85 psi on those injectors. im running 15psi, stock computer, o2 clamp and turned the afm 4 clicks for a leaner condition.

what do you guys think? the car idles fine just a little to rich!
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Old 08-23-2007, 07:46 PM   #2
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ngarcia the problem is not idling 400"s it is getting them to run right i never could even with my safc. you should be set for fuel for a good while though
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Old 08-23-2007, 10:16 PM   #3
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do you really expect like 325-350BHP at 15psi of boost?! cusae that's what 85psi of fuel with 430s would give you.

how are you controlling them?
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Old 08-23-2007, 11:01 PM   #4
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im not using anything i wanted to remove the begi afpr. i checked on rc engineering site and plugged in numbers for the injectors and for 260bhp i got about 80 psi of fueli figure remove the afpr and add pure water non alcohol injection i can achive some useful number the reason was that i was using 295cc supra na injectors and they seem to lock at 15 psi
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Old 08-24-2007, 09:43 AM   #5
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uhhhhh......




and what are you talking about?! How do your current injectors "seem to lock"? How do you expect your ecu to know what to do with 430cc injectors that are 53% larger than stock? Do you have any clue what you are doing?
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Old 08-24-2007, 11:35 AM   #6
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Quote:
Originally Posted by Braineack View Post
Do you have any clue what you are doing?
Shhhh.. he's creating a combination flamethrower / smoke and fog machine.

(no he doesn't have a clue....)
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Old 08-24-2007, 12:35 PM   #7
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I wanna do a flame thrower on mine it will be bad ***. Ngarcia i dunno what numbers you are feeding or what kinda fuzzy math you put in there but you are wrong please reference braineack's faq and the Pic he posted they are both correct. Some times when **** like this happens it is best to step back and say hhmmm WTF, and oh oops i gues i learned that the hard way.
PS hydrolocked motor is not good please do your best to avoid that.
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Old 08-24-2007, 01:13 PM   #8
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Fuel Injector Worksheet

--------------------------------------------------------------------------------


B.H.P.





* See note below.



Warning: Duty cycle should not exceed 80% (0.80) for these calculations.



PSIG


--------------------------------------------------------------------------------

Lb/Hr cc/min




* Brake specific should be .45 to .50 for naturally aspirated engines,
.55 TO .60 for supercharged engines,
and .60 to .65 for turbocharged engines.











All images and materials are Copyrights of R.C. Engineering, Inc.


this is the infor i used
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Old 08-24-2007, 01:16 PM   #9
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well i guess it didnt show up but here is what i entered 260 bhp, 4 injectors,
.65 fuel consumption, 80% cycle, 80psi rail, goes to 409cc
but looking at it from a different angle i will continue to use the 300cc yellow top injectors, thanks for your comments
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Old 08-24-2007, 02:03 PM   #10
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you should expect .55 BSFC.....


I simply think you are just going to have a hell of a time dialing in your fuel to support that much power with just and FMU/Bipes combo. The problem isn't supporting the power, it's the fuel delivery itself, especially once open loop kicks in....and especially without a wideband.
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Old 08-24-2007, 10:38 PM   #11
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i noticed that too. the car didnt want to run under boost, i removed them and will have them for sale. thank guys
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Old 08-25-2007, 10:14 AM   #12
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I was getting somewhere aroun .45-.47 bsfc on y initial setup according to the dyno it is all in the effeciency
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