Subject	Re: Can you run 555s with a stock ecu? (and more Qs)
Posted by	kZtt (zedparts.com) on February 21, 2002 at 2:34 PM
	This message has been viewed 133 times.
In Reply To	Can you run 555s with a stock ecu? (and more Qs) posted by Adam A. on February 21, 2002 at 02:17 PM
Message	You can't really use the stock ECU with 555cc injectors... 555cc injectors will flow 555cc of fuel every minute its open, while stock injectors only flow ~380cc of fuel every minute. The ECU can only tell the injectors to open/close, so in order for the ECU to figure out how long to open the injector in order to deliver x amount of fuel, it has to know what the injector size is. The stock ECU will assume its 380cc, but with 555cc injectors, the same opening time will deliver 46% more fuel... that's why you need the ECU to be reprogrammed for the 555cc injectors. Check out my prices on Nismo injectors...
Follow Ups	JWT Sport 500s...do I need larger injectors/ecu/pop? - Adam A. 11:35:53 02/21/02 I would do the injectors now..keep your air/fuel right (n/m) - wesman [92TT-less ] 11:47:05 02/21/02 What injectors would you recommend? Nismo 555s? (n/m) - Adam A. 11:54:21 02/21/02 Get the Nismo 555(new compare to RC).They're like ~$800 now. (n/m) - timz 11:57:52 02/21/02 Nice, cheaper than I thought. Anything else I'll need? (n/m) - Adam A. 12:02:18 02/21/02 Injector connectors and o-rings. Call Coz. (n/m) - timz 12:16:12 02/21/02 You don't -NEED- anything w/ sport 550's, but - DamonH 90TT 14:02:05 02/21/02 Can you run 555s with a stock ecu? (and more Qs) - Adam A. 14:17:49 02/21/02 Re: Can you run 555s with a stock ecu? (and more Qs) - kZtt (zedparts.com) 14:34:03 02/21/02 Do the 555s you sell come with o-rings? (n/m) - Adam A. 14:49:01 02/21/02 Re: Do the 555s you sell come with o-rings? - kZtt (zedparts.com) 14:55:59 02/21/02 Well..you would only be able to run 11-12 psi with them >> - wesman [92TT-less ] 15:11:59 02/21/02 Sport 500's aren't much bigger then stock - DamonH 90TT 15:18:33 02/21/02 Well...Sport 500's can flow 420 rwhp....that's about >> - wesman [92TT-less ] 15:33:45 02/21/02 heh ... true, true. (n/m) - DamonH 90TT 15:45:38 02/21/02 Does that mean you can get 420rwhp without new injectors? - Adam A. 16:36:35 02/21/02 You can get about 340-360rwhp with stock injectors (14psi) > - DamonH 90TT 17:27:03 02/21/02 Overbuild the fuel system -> - MikeeZ 14:13:32 02/21/02 agree 100% (n/m) - wesman [92TT-less ] 15:22:13 02/21/02 THANK YOU EVERYONE > - Adam A. 17:14:42 02/21/02
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