Head Swapping

[shonen]

Hi

I would just like to know what is the deal with head swaps amongst the RB family ?

In particular an RB26 head on a NEO RB25 ?

Read about this on the first Top Secret demo GTT....would like to know what is involved ie is it pretty much bolt on ? or would it be easier to just get an RB26 in the first place ?

Besides the plenum and fuel rail etc....anything else that needs to be changed along with the headswap ?

Also just out of curiousity....excuse my ignorance.....but what combo makes an RB24 ? Its based on an RB20 right ?

Edited August 20, 2005 by shonen

[jas/slo32]

rb26 head has solid lifters and bigger valves than a rb25 head

rb25/26 heads are interchangeable and will also fit rb30 bottom end with pulley mod

[Abo Bob]

NEO RB25 also has solid lifters.

If you change the head to RB26 then most of the rest would be different, wiring particularly would be an issue.

I reckon you would be better either putting in a full RB26 or keeping your head and putting an RB30 bottom end under it.

[shonen]

haha cool...thanks adam.

Its something Ill definetly consider if I keep the car....

So with an RB30 bottem end....what would the capacity of this RB30/RB25 hybrid be ?

gonna decide at the end of the year whether or not to sell.....

going to a 4 cylinder.....petrol prices are crazy these days and I live too far out to keep up with it.....

yes yes im a sellout/soft etc etc...heard it all

[Abo Bob]

I think it ends up being nearly 3.1 L.

If petrol is the problem you could always just keep the standard turbo and keep the skyline

[Beer Baron]

RB24 is made by using a slightly modified RB20 block with an RB26 crank, RB26 rods, and slightly oversize pistons (custom to suit the 26 rods) it still uses RB20 head but with the longer stroke and slightly larger bore it is now 2.4 litre RB20.

for your car go the 26 swap. Or even 26/30.

[discopotato03]

Do I remember SK or someone saying there was a suitable piston ie 4AGZE that completes the package , are any piston mods necessary or std Toyota and at what cost ? Which head gasket ?

Cheers A .

[ed]

haha cool...thanks adam.

Its something Ill definetly consider if I keep the car....

So with an RB30 bottem end....what would the capacity of this RB30/RB25 hybrid be ?

gonna decide at the end of the year whether or not to sell.....

going to a 4 cylinder.....petrol prices are crazy these days and I live too far out to keep up with it.....

yes yes im a sellout/soft etc etc...heard it all

<{POST_SNAPBACK}>

A 4 banger can drink just as much if you have a lead foot!

[POOMBAH]

A 4 banger can drink just as much if you have a lead foot!

<{POST_SNAPBACK}>

Honestly though, anyone who buys a skyline has to be a little bit of a lead foot themselves

[shonen]

Honestly though, anyone who buys a skyline has to be a little bit of a lead foot themselves

<{POST_SNAPBACK}>

Alright alright...the petrol thing was just an excuse

lookin at an sti or an evo 7 next year sometime........car is getting old......has me thinking.......if I do end up keeping it then I wanna got the whole nine yards and prob go for the 26 swap......until then I want to stop spending money on car for a little while.

so just doing some research while I save for the time being.... so one last question for now regarding the 26 swap. Would a GTR power fc be adequate or would I need to go for something like a Haltek or motec etc ?

anyways thanks for the info guys......