Jump to content
SAU Community

Any 1 Put Rb20det Head On Rb30e Bottom End?

turbohectics
 Share

Recommended Posts

Lithium Grand Master

Lithium

Posted
Posted
G'day guys i have my Rb20det with blown rings

and a RB30e block with new rings and bearings

Can I mate them up?

I want to keep my loom and ecu can i still do that if i get a rb25na r32 head?

cheers

its A31 cefiro btw

No, you can't mate up the RB20DET head and RB30E block - but (I may be corrected here) I'm pretty sure you can use your loom and ECU with the RB25DE head. I assume you are using an aftermarket ECU for this?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

The RB20/RB30 heads flow about the same.

So no point, might aswell stick with the RB30 head and valve/cam that, cheaper too when there are only 12

RB25 head is what, 30% more flow in stock form, hence why its used.

RB20/30 simply put is a waste of time and money. Everyone that has done it would never do it again.

Sydneykid Grand Master

Sydneykid

Posted
Posted
RB20/30 simply put is a waste of time and money. Everyone that has done it would never do it again.

100% agree, we did it before RB25/26 heads were readily available at reasonable cost. The required welding and machining of the RB20 head makes it far more expensive than simply bolting on an RB25 head. There are lots of issues with running an 86 mm bore into a 78 mm diameter cylinder head.

Cheers

Gary

Lithium Grand Master

Lithium

Posted
Posted
100% agree, we did it before RB25/26 heads were readily available at reasonable cost. The required welding and machining of the RB20 head makes it far more expensive than simply bolting on an RB25 head. There are lots of issues with running an 86 mm bore into a 78 mm diameter cylinder head.

Yeah I guess I could have said that but decided easier just to say you can't, much the same as technically you can't use a solid piece of alloy as a head :)

Lithium Grand Master

Lithium

Posted
Posted
100% agree, we did it before RB25/26 heads were readily available at reasonable cost. The required welding and machining of the RB20 head makes it far more expensive than simply bolting on an RB25 head. There are lots of issues with running an 86 mm bore into a 78 mm diameter cylinder head.

Yeah I guess I could have said that but decided easier just to say you can't, much the same as technically you can't use a solid piece of alloy as a head without a bit of modification :)

  • 6 months later...
SimonR32 Grand Master

SimonR32

Posted
Posted
100% agree, we did it before RB25/26 heads were readily available at reasonable cost. The required welding and machining of the RB20 head makes it far more expensive than simply bolting on an RB25 head. There are lots of issues with running an 86 mm bore into a 78 mm diameter cylinder head.

Cheers

Gary

that being said... if you had a rb20det head that already had the mods performed to it and you wanted a cheap project would it be worth it?!?

ive seen a stock rb20 head flow 375rwkw with the right turbo so i cant see it being too much of a restriction for say 300-330rwkw

AD4M Proficient

AD4M

Posted
Posted

letme know when you want to come pick it up simon haha

my car came fitted with a 30/20DET combo from japan, we've had the head side to side with a stocker and the only visable mods were machining out the water galeries to mate up to the block

stupidly responsive but never got a chance for a dyno run with it all

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
    • GTSBoy
      Speed Sensor replacement

      By GTSBoy · Posted

      Yes it is ATF. I quote @Duncan "it takes a good synthentic auto trans fluid like Castrol Transmax Z" It's not a diff. It's a transfer case. Totally different thing. Yes, fluid will come out the sender hole. No you do not really need to drain it. Just pull the old, quickly poke the new, clean up and top up. But realistically, you should probably take the opportunity to change it anyway.
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Hey all. I’m looking on replacing my speed sensor on my R33 GTR. Will the center differential need to be drained, and if so, the center diff uses ATF fluid D? I found information on the transmission, front diff and rear diff. Can’t find a for sure answer for the center diff. Any help will be greatly appreciated.
×
×
  • Create New...