R33 Series 1 And 2 Block Interchangeable?

[Touge Kyousou]

Hi all.

Anyone know if the r33 rb25det series 1 and series 2 blocks are directly interchangeable I.e bolt on affair?

My mechanic is a bit hazy on the vtc oil return/feed in particular.

Basically my bottom end is rooted and found another bottom end on here but seller is unsure if it's a s1 or s2 block.

Thanks all.

[mad082]

should be the same. as far as i know it's only a few of the bolt on electrics that are different.

[skylinesandman]

^^ yeah im pretty sure bottom end is the same s2 run

diff coilpacks and have variable valve timming

and a few other bit different but only electrical stuff

[045HOW]

^^ yeah im pretty sure bottom end is the same s2 run

diff coilpacks and have variable valve timming

and a few other bit different but only electrical stuff

its not variable valve timing,its variable cam timing and series 1 has it.

[SeanO]

Yeah series 1 has VCT as well. However Both Series 1 and 2 use different electrical sensors.

That does not effect its interchangablity. As you can bolt up series 2 electrics to a series 1 block and not have issues.

[skylinesandman]

oh my bad rookie mistake lol

really i thought only 1.5 & 2 had it bein the 1.5

has a 2 motor at least thats wat id heard i havent

seen under any s1's

[mad082]

yeah both s1 and s2 have VCT. also, slightly off topic, don't make the rookie mistake of thinking the s2 has the ignitor built into the ECU like many people do. it is built into the coils.

[skylinesandman]

^^^

yeah i remember that from one of your old posts

[045HOW]

yeah both s1 and s2 have VCT. also, slightly off topic, don't make the rookie mistake of thinking the s2 has the ignitor built into the ECU like many people do. it is built into the coils.

Wow haven't heard that one before.

LOL!

[mad082]

Wow haven't heard that one before.

LOL!

gotta get in early before they read some other noobs post and gets the wrong info.

[Touge Kyousou]

Thanks for th replies guys.

Upon further diagnosis, my head is stuffed too lol so won't be purchasing this bottom end from the seller. I'll let them know this info anyways as it should help 'em sell it.