R32 RB25DE - DET

[R32ONP]

hey guys i have a r32 skyline with factory RB25DE (the actual r32 RB25de wuch looks like a 20de)

i wana turbo it and i can get my hands on a rb25det from a r33 with a bent head with broken valves and i was wondering if the pistons and rods from the r33 engine will go straight into my high compression rb25de to efectivly make it a low compression det??

cheers

[Carl H]

will drop right in, so no worries!
been kicking around an rb25de block in my garage that i bought just for the head for my rb30!
be sure to measure bore sizes however as nissan has three different piston grades and if you use a large grade in a small bore you may end up with some serious issues, like a seized piston.

[R32ONP]

choice thanks bro...the r32 rb25de heads work ok with low comp pistons?? this may be a silly question but are the rods from the r33 rb25det stronger than the rb25de r32 rods?? and also will the r33 rb25det rods bolt up2 my r32 cranks all ok?? cheers for the help guys

so if i pull it all apart and the rb25det pistons i have are a larger piston i just bore the block to suit??

[R32ONP]

oh and another thing...which headgasket would i go for (brand new)...would i go for a rb25de R32 headgasket or can i get a thicker one?? or rb26 headgasket?

[Carl H]

everything should bolt right onto your stock crank, however replace all bearings and check clearances...i've had good luck thus far with acl bearings.
the head will be just fine as it has a similar combustion chamber size as the rb26 and r33 rb25, it wont change the CR of the engine too much but its a good idea to cc the chamber and figure out your exact CR for tuning sake.
i would probably go for the r33 rods assuming they are in good shape but have the machinist check to make sure they are still true, as the pistons tagged the valves it may have possibly bent the rod some.
i would HIGHLY reccomend that you upgrade to arp rod bolts if you plan on making any kind of reasonable power as i have little faith in stock retorqued rod bolts...FSM says you can reuse them but i have seen too many engines making power let go because the rod bolts streached.
the piston grades are so close together that you may be able to just hone the block out and get the clearance you need, again measure to be sure.
as far as head gasket goes, you can use a standard rb25de head gasket or an rb26 head gasket, i'd use the 26 gasket myself as it is a bit 'beefier' compared to the standard r32 25 gear.
a set of arp head studs to top it all off and you should have a nice conversion!
remember to have the ecu remapped for the turbo bits and consider a set of gtr injectors as the stocker 270cc injectors are pathetic and will run out of fuel very quickly.

choice thanks bro...the r32 rb25de heads work ok with low comp pistons?? this may be a silly question but are the rods from the r33 rb25det stronger than the rb25de r32 rods?? and also will the r33 rb25det rods bolt up2 my r32 cranks all ok?? cheers for the help guys

so if i pull it all apart and the rb25det pistons i have are a larger piston i just bore the block to suit??

[R32ONP]

cheers thanks for all the help bro thats top notch stuff

i have had alota experience (and i mean in my face) with rod bolts snapping (reused stretched bolts) and the rod snapping outa the piston and watching the rod flop around through a hole in the block haha so deffinatly new rod bolts