rb25 hx35 build

Discuss the RB20, RB25 and RB26 series engines.
s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Alright guys, im at a toss up with some things. First off are there any writeups on running oil lines for a holset on an rb? Also if my goal is 400/450 with a plan in the future to go to 500whp should I most def go z32 maf? Onto the next question, would an walbro 255 and 600cc injectors be sufficient for 500whp? And my last question "for now that is" im stuck on which FPR to buy, Rawbrokerage has a sick aeromotive on specifically for rb's but its 270$ can you just go with a cheap off brand FPR? If not what do you recommend? I know everyone always says Nismo or Aeromotive but I need some ideas. As for the walbro 255, is there a specific one to buy? Just the one for 89-w-e year correct?


95_240
Posts: 560
Joined: Fri Jan 07, 2005 4:26 pm
Car: 1995 240sx

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Should have gone top feed instead of sticking to side feed that is why I was selling my nismo fpr.

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Staying budget for right now, im buying remanned injectors so not that big of a deal. Im not going for anymore than 500whp on this setup so itll be fine

95_240
Posts: 560
Joined: Fri Jan 07, 2005 4:26 pm
Car: 1995 240sx

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Redrilled injectors are not worth it imo. 600cc won't be enough. I'm shooting for 400whp with bosch ev14 750cc.

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Well the 600cc # came about because I was gonna use SAFC2 but the more searching I do and income tax coming up I may go standalone so ill bump up to 850s prolly

95_240
Posts: 560
Joined: Fri Jan 07, 2005 4:26 pm
Car: 1995 240sx

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I guess you're realizing your first mistake. Having a budget.

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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haha well I did a insane build online priced all the parts and everything...To get what I originally wanted which was 700whp would be around 18-20k and I got student loans brand new car payment... Wanna get this thing on the road just for a sunday driver

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TimTurboZ
Posts: 663
Joined: Mon Oct 06, 2008 8:59 pm
Car: 95 S14 w/RBXX... 65' Mustang GT
Location: Sacramento, CA

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yes z32 MAF and I suggest a 400 pump vs the 255. (the + and - were opposite on my pump, a friend warned me that may be he case)

my .02c

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Okay well with 400 pumps...are they straight drop ins just like the 255?

95_240
Posts: 560
Joined: Fri Jan 07, 2005 4:26 pm
Car: 1995 240sx

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The aeromotive stealth 340 is the same dimensions as a 255 and installs easily. If you're going standalone that has map capabilities then maf doesn't matter. I'm running 3an feed line and 12an return for my hx35.

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Did you have to tap into anything for the feed and return lines?

95_240
Posts: 560
Joined: Fri Jan 07, 2005 4:26 pm
Car: 1995 240sx

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You use the stock feed port and drain port. All of this is basic information that is out there.

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themadscientist
Posts: 26254
Joined: Tue Nov 12, 2002 3:30 pm
Car: R32 GTR, DR30 RS Turbo, BRZ, Lunchbox, NSR50 Sportster 883 Iron
Location: Staring down at you with disdain from the spooky mountaintop castle.

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I have an HX52 on mine and there is nothing exotic to it. I am concerned with your thinking about trying to trim this thing out with an SAFC, though.

s13RBpowered
Posts: 30
Joined: Sun Jun 23, 2013 6:35 pm
Car: 1989 s13 RB25 powered

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Im going to bite the bullet and go with AEM Infinity...


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