roller head and B14 or B13 block

NiceGuy · 12-20-2002, 05:25 PM

My question is, will a B15 roller head mount and work on a B14 or B13 block?

The reason I'm asking is because I'm looking to buy a used block to get bored for 87mm Z32 pistons to use on my B15. And I don't believe there will be many B15 blocks for sale out there.

Also, if anyone knows where I can get some direct replacement 11:1 pistons instead, let me know.

Will VE pistons yield 11:1 compression in the B15 roller motor? I think someone said 11.3:1?

OnyxEros · 12-20-2002, 06:12 PM

funny you would be better off putting an older head on the b15 block, same block as the VE if that helps any

NiceGuy · 12-20-2002, 06:42 PM

Well, if I could find a spare B15 block, then I would use that, but I doubt anyone is selling one. I can get a B13 or B14 block cheap, and send it to get bored, and slap the pistons in and voila...

CowboyDren · 12-21-2002, 11:27 PM

Yes, it's possible, because it's been done. Ask David Evans about the 200SX with the roller head at last year's SERCA convention.

Andreas Miko · 12-22-2002, 08:16 AM

They are all the same block so just put any block you can find on there. I you can find a roller bottom end you will get the better crank.

Andreas Miko

NiceGuy · 12-23-2002, 12:54 AM

I already have the roller motor in my car. I just need a block to send to be bored to 87mm.

Once I get that back, I can swap my crank into the bored block along with my stock pistons and the new Z32 pistons.

sleeping 91ser · 12-24-2002, 04:31 PM

I like what your doing keep us updated as you go along,

jlequipment · 12-29-2002, 07:02 PM

is there any advantage to haveing the roller head

CowboyDren · 12-29-2002, 08:10 PM

Between the lower drag of the rollerized valvetrain itself, either the head shape or the piston (we're not sure which, but something in there is worth 3 points of compression ratio), bigger injectors, a different intake manifold, and the lower inertial mass of the crankshaft, it's worth about 5 CHP (145 vs. 140, according to Nissan propeganda). Not to mention relocation of the oil filter to the second-most-retarded location possible. Theoretically, there are dozens of advantages to having a rollerized head. In the SR20DE reality, though, it's a severe handicap, as JWT's S3 grind is the only readily-available upgrade, and the valvesprings limit it to about 7200 RPM (though the B15 ECU redlines at 6600).

NiceGuy · 12-29-2002, 10:10 PM

Jon, go here:

http://www.sr20deforum.com/showthrea...threadid=32481

It seems nobody believes me that the roller engine has .3 more compression than a USDM SR20DE.

2wdBlazer · 12-31-2002, 12:10 PM

Quote:

Originally posted by CowboyDren
it's worth about 5 CHP (145 vs. 140, according to Nissan propeganda).

Well I believe that the 95-97's were not really 140 hp due to the newer intake & cam design (I know i've heard this before). Some how they were still able to call them 140 hp. The 145 hp motor is probably more like a 10 or so hp increase over the 95-97's.