275cc Vs 240cc Injectors - Mitsubishi-Forums.com

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275cc Vs 240cc Injectors

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islandrvr View Member Profile	Apr 20 2009, 12:04 PM Post #1
Newbie Group: Members Posts: 1 Joined: 16-April 09 Member No.: 70,139 Status: Location: grenada Drives: 1995 rvr	alright i hope to not waste ya'lls time by posting a silly question so here i go. I live on the island of grenada were all vehicles go to die. I had one fuel injector go out on my 96 RVR 16valve dohc and the only replacement i could find was 275cc injectors mine were 240cc. instead of just having one oddball injector i replaced them all with the 275's. is there any thing else i need to do like increase spark plug gap or find a high airflow filter. please let me know what yall think

Benckj View Member Profile	Apr 20 2009, 03:25 PM Post #2
Expert Group: Super Mod Posts: 1,123 Joined: 31-October 04 Member No.: 2,513 Status: Location: Alexandra, New Zealand Drives: 1997 Pajero GDI	With my limited experience with using diff injectors the change you have done will result in overfuleing and running very rich reducing performance and economy. I think you should be able to tune the fuel mix out by increasing your timing and making sure you have optinium air flow + spark. If you have not done a tune up now is the time for plugs, cap, rotor & air filter (K&N). Your O2 sensor will also become essential for adjustment of your A/F ratio so if you have not tested best to make sure its operating correctly. Hope that this helps. Jim

KiT TeUnG 2549 View Member Profile	Apr 20 2009, 08:21 PM Post #3
Veteran Group: Members Posts: 2,182 Joined: 21-May 08 Member No.: 58,134 Status: Location: Chiang Mai , Chiang Mai ,TH Drives: 1997 Mitsubishi Diamante VR-S SUPER INVECS II , 1990 Mitsubishi Galant VR4 MR, 2006 Mitsubishi Triton PLUS 3.5 DOCH , 2001 Mitsubishi Galant GSR	If yu are using those injectors yu may want to use a plug , NGK a little hotter than the one yu are using , sumthin like for hmmm, a Galant GS/GSR etc (4G64 DOCH) like 94. Also using a differant fuel pressure regulator will help. It all depends on teh type of rail yu have, there were 3 types of fuel rails with the DOCH engines. using a different fuel pressure regulator would reduce standing fuel pressure by a few lbs so it would bring yu to where yu should be with teh benifit of a couple more HP.A less restrictive air box will help offset this also.

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