I have 550s, anyone have 460s.

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12-01-2007, 01:46 PM

cjernigan

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I have 550s, anyone have 460s.

RX7 high imp 550s. PNP for any miata. Curious if anyone has some serviced PNP 460s they want to trade?
Mine have less than 300 miles on them.
They were serviced by cleaninjectors.com and all flowed within 2% of eachother.

12-01-2007, 03:31 PM

paul

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i have pnp rx7 redtop 460s. was about to send them in for cleaning. how much of a hurry are you in?

12-01-2007, 04:15 PM

compy

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I have pnp rx7 redtop 460's also, just cleaned and flowed at 480. 0 miles after cleaning. ready to ship.

12-01-2007, 04:30 PM

paul

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Quote:

Originally Posted by compy

I have pnp rx7 redtop 460's also, just cleaned and flowed at 480. 0 miles after cleaning. ready to ship.

i'm sabotaging your car today when i get there.

12-01-2007, 09:02 PM

cjernigan

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I'm in no hurry guys. Just tired of the rich idle issue.

12-01-2007, 10:29 PM

Ben

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CJ, get Paul's mad cheap supra black tops and try out lowZ for us.

Or, try the High Rez code.

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Quote:

Originally Posted by concealer404

Buy an MSPNP Pro, you'll feel better.

12-01-2007, 11:01 PM

cjernigan

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Think i'm going go try hi-res first. If it get misfires with it i'll go low-z or something like that.

12-02-2007, 12:11 AM

Trent

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Man, this is not what i was wanting to hear as I'll be running those exact same 550 injectors with my MSPNP.

12-02-2007, 12:49 AM

Al Hounos

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how rich is your idle?

12-02-2007, 12:51 AM

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Mach929

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i run them, i had them cleaned and tested and came back all flowing around 620cc/min. i can idle them no problem. mspnp req fuel at 4.9, idle squares at 38

12-02-2007, 12:59 AM

#11

cjernigan

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Al, it will idle steady at 12:1. My VE table values for fuel at idle are 60 with a reqfuel of 5.6.
I know other people are running 550s and they have a lean idle. Like rappadan for example a mach apparently.
Paul brought up the point of fuel pressure tonight while i was talking to him. Don't NAs idle at 30 psi?
NB's all have a returnless fuel system and a constant fuel pressure. When i look up how much fuel pressure they run constant Corky Bell says 70 psi and up while a few others say from 53-61. So lets say 50-70 psi for NB fuel pressure at all times. That's quite a bit more than NA's and could be a good reason why i can't lean it out anymore.
If i lean it out from 60 to 59 it oscillates like crazy. Soon as i go back to 60, it's good to go. I've tried everything from advancing the timing up to 20 and everywhere in between. Keeping all the cells around the idle cell the same so it doesn't fish around, it doesn't.
I need to try hi-res code. Just don't have time right now.