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Doing My Homework

LTHLRB

By LTHLRB,
in R Series (R30, R31, R32, R33, R34)

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LTHLRB Grand Master

LTHLRB

Posted
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Posted (edited)

ah right right, do gtr injectors fit in the std rb25 fuel setup and would i need an ecu if i upgrade them? i know that with the rb30's its u haveto change the ecu if u have the injectors. But im not too sure on the rb25 ecu.

Edited by LTHLRB
Jetdat Veteran

Jetdat

Posted
Posted
According to HPI stock r33 injectors are only 370cc/min and as such run out of flow at around 200rwkw.

really???

i have about 200rwkw with standard injectors and the are nowhere near their max duty cycle...

i think they are only at around 70%...i thought 250rwkw was achievable with standard injectors??

also dont believe everything you read in magazines, rather talk to people with experience...

boj01 Experienced

boj01

Posted
Posted
aren't SR20 injectors side feed as well?

Yes, SR20 injectors are also side feed. You will need to buy larger Sard/Nismo/Bosch/Denso injectors if you want an upgrade as there is really no standard injectors that are an easy side feed upgrade.

cogs Experienced

cogs

Posted
Posted

I thought I read S15 injectors (side-feed) were a straight fit on R33 GTST? They aren't 550cc but they are higher than r33 std 370cc, maybe 470?

Also GTI-R SR20 injectors are top-feed and some side-feed SR20 injectors are only 370cc so same as R33, so if you go sr20 make sure you get the right ones.

LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted (edited)
Well how much power are you chasing?

If Jetdat is right then you can get 250rwkw with std injectors.

The most i can get in standard from, standard being ecu, bottem end, cams. Maybe around 200 - 250 rwkw. Ultimately in the long run around 300 350 rwkw using a 35/40 and maybe rb30 bottem end rebuilt with steel rods and forged pistons and a good set of cams.

Edited by LTHLRB

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