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Building Tough Rb25 - Opinions Pls

Damien2

By Damien2,
in Engines & Forced Induction

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Damien2 Contributor

Damien2

Posted
Posted

I've just recently bought an r33 gtst series 2 (1996). It currently has 360rwkw on eflex.

Current setup...

Greddy plenum

740cc side feed injectors

Blitz front mount

6boost manifold

Gt3582r

Walbro intank

Surge tank

Aeromotive A1000 fuel pump

And other bits and peices...

So I want to make about 450-500rwkw.

Im going to get an eflex sensor to be able to run up to 85% ethenol and 98 in emergancies.

This is what I want to do...

Head

Supertech 1mm over sized valves(purchased)

Supertech Valve springs (purchased)

Supertech titanium retainers(purchased)

Tomei valve guides

Tomei 270 8.8mm lift cams(purchased)

Tomei 1.5mm metal head gasket(purchased)

ARP 2000 head studs(purchased)

Tomei inlet and exhaust cam gears(purchased)

Bottom end

Spool rebuild kit with CP pistons

Has acl race series bearings and spool conrods etc.

Spool high volume sump

Can someone recommend an oil pump?

New water pump N1?

ARP 2000 main studs

Fuel

Bosch 2200cc injectors (purchased)

Billet fuel rail(purchased)

Walbro 460lph e85 friendly pump

Also will be going larger precision turbo but thats another story.

This list is not exhaustive and any input and opinions would be appreciated.

Are my power figures acheivable and relatively reliable?

Please let me know if I'm on the right track.

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zebra Grand Master

zebra

Posted
Posted

No point filling hte head with all those shiny bits and not having the ports gone over by someone who knows what they are doing.

Oil Pump - Nitto or Tomei

or better yet an external pump setup

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Damien2 Contributor

Damien2

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Sorry mate, I just took it for granted that any reasonable person would have all machine work (porting and so on) done when their doing a build like this.

Thats why I didn't mention it.

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Damien2 Contributor

Damien2

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just drop in a 3.0L.. cheaper in the long run.

when my motor goes pop I will do it (provided the car doesn't sell lol)

I know what your saying, I was thinking of doing a 30 bottom end but I just love a highly strung rb25.

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Damien2 Contributor

Damien2

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what's wrong with a highly strung RB30? lol

it will make more power under the curve and bring any turbo on earlier than a Rb25

Aaagh. Now you have me thinking again! Lol.

Well the head is pretty much sorted I'll look into the 30 bottom end. What do you recken of the spool rb30 bottom end package??

It looks reasonable...

Would I have clearence issues between my 6boost manifold and the block??

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Ben C34 Grand Master

Ben C34

Posted
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Sorry mate, I just took it for granted that any reasonable person would have all machine work (porting and so on) done when their doing a build like this.

Thats why I didn't mention it.

Can't assume people are reasonable on here!

And I wouldn't group porting with machine work, but whatever.

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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Aaagh. Now you have me thinking again! Lol.

Well the head is pretty much sorted I'll look into the 30 bottom end. What do you recken of the spool rb30 bottom end package??

It looks reasonable...

Would I have clearence issues between my 6boost manifold and the block??

go here:

http://www.skylinesaustralia.com/forums/forum/184-rb30-conversions/

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89CAL Grand Master

89CAL

Posted
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I would suggest going some more modern injectors. Go top Feed ID's or something. My tuner hates that I have Nismo's, to me the car runs perfect but he reakons he could get it a whole lot sweeter with some ID's etc in there

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Damien2 Contributor

Damien2

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I would suggest going some more modern injectors. Go top Feed ID's or something. My tuner hates that I have Nismo's, to me the car runs perfect but he reakons he could get it a whole lot sweeter with some ID's etc in there

Bosch injectors no good? I thought they were the same as ID's, they are also top feed. No?

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89CAL Grand Master

89CAL

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ID's were just an example. All I know is I got Nismo's because thats what I used last time and my tuner doesnt like them. But too late to change now. Just because they are older tech/design.

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Bosch injectors no good? I thought they were the same as ID's, they are also top feed. No?

Yes they are the same thing - 89CAL was looking at your current list and missed your shopping list.
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