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RX-7 3rd Gen Specific (1993-2002) RX-7 1993-2002 Discussion including performance modifications and Technical Support Sections.

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Old 01-12-2009, 06:35 PM   #1
somchhir1
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Injector upgrade

I wanted to know if it was necessary to upgrade the fuel injectors after installing a new fuel pump? For instance a Walbro 255 pump.
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Old 01-12-2009, 06:42 PM   #2
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You must list all your motor mods before that question can be answered . Intake ,exhast ,porting, computor ,modified twins,single ,on and on
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Old 01-12-2009, 06:46 PM   #3
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Quote:
Originally Posted by Garfinkles Motor Works View Post
You must list all your motor mods before that question can be answered . Intake ,exhast ,porting, computor ,modified twins,single ,on and on
Apexi intake, DP,MP, CB, PFC, SMIC...stock twins, no porting.
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Old 01-12-2009, 08:17 PM   #4
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No... Unless you have certain power range and boost.
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Old 01-13-2009, 12:35 AM   #5
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like mentioned above, how much power do you want?
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Old 01-13-2009, 11:23 AM   #6
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Quote:
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like mentioned above, how much power do you want?
i'm hoping for the 400hp range....
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Old 01-13-2009, 11:53 AM   #7
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to get in the 400hp range at the wheels you will def. need larger injectors than stock.
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Old 01-13-2009, 12:14 PM   #8
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400 RWHP stock turbos?? 400 at the engine is about 320-350 @ the wheel. At low to mid 300s, you might be ok with stock injectors but recommend to go bigger..

400 RWHP, I say its not good to try with stock twins. You could go with BNR stage 3 (BNR is local) or go single. But not with stock turbos.. Also, you would need a good tune when you get injectors swapped.. Good thing if you get this done within few weeks.. as Ray from PFS is coming down for a tuning day (huntsville, cost anywhere from $400-800 pending dyno time).

I have some 1300s for sale or you could go 4 x 850s (I have 850s also).
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Old 01-13-2009, 01:26 PM   #9
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You would need some form of tunable ecu as well.
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Old 01-13-2009, 01:37 PM   #10
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Quote:
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You would need some form of tunable ecu as well.
He said he had a PFC.

Listen to what Herblenny said. 400rwhp with stock twins is possible but pushing the limits with them.
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Old 01-14-2009, 07:37 AM   #11
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Ha yea he did I read that post and completely skimmed over the PFC...
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