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Old 05-28-2009, 12:50 PM   #1
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Default RX7 460CC Injector Pressure

Hey folks. I did some searching around and didn't find an answer to my Q. I'm trying to scale my injectors in my AEM EMS, and I am currently running 1997 miata injectors. I went to the DIY wiki miata turbo page, and found that the stock injectors flow 254CC @ 3 Bar. I'm going to install some RX7 460cc injectors, p/n 195500-2010, but I need to know what the max flow is at X Bar to properly scale my fuel chart. Can anyone help with this?
Thanks!
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Old 05-28-2009, 01:00 PM   #2
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The RX7 injectors are rated at ~3 bar just like most other injectors.

Here is a calculator that will give you an approximate answer for fuel flow through an injector after changing the fuel pressure: http://rceng.com/technical.aspx
(scroll down to "Find Fuel Flow After Pressure Change")

Assuming you're not changing pressure, just scale your table by Old Injector / New Injector.

FYI- the data I have seen says the 1990 Miata injector flows 230cc. Where did you find the 254cc number?
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Old 05-28-2009, 10:29 PM   #3
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Quote:
Originally Posted by Joe Perez View Post
The RX7 injectors are rated at ~3 bar just like most other injectors.

Here is a calculator that will give you an approximate answer for fuel flow through an injector after changing the fuel pressure: RC Fuel Injection
(scroll down to "Find Fuel Flow After Pressure Change")

Assuming you're not changing pressure, just scale your table by Old Injector / New Injector.

FYI- the data I have seen says the 1990 Miata injector flows 230cc. Where did you find the 254cc number?
Thanks for the info! My car is a 1990 chassis, but I have a 1997 motor in it.
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Old 05-29-2009, 10:45 AM   #4
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Quote:
Originally Posted by dustinb View Post
My car is a 1990 chassis, but I have a 1997 motor in it.
I fail at reading signatures.
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