Rb25det S1 And S2 Power Differences

[Primowave]

Hi there I noticed there were some differences in torque between the series 1 and 2 RB25DET engines.

Series 1: 250 ps (183.88 kw) / 6400 rpm - 30.0 kg*m (294.20 N*m) / 3200 rpm

Series 2: 250 ps (183.88 kw) / 6400 rpm - 30.0 kg*m (294.20 N*m) / 4800 rpm

http://cars-directory.net/specs/nissan/skyline/1996_1/21671/

http://cars-directory.net/specs/nissan/skyline/1996_1/21675/

Where is the extra torque from the series 1 motor coming from. And if it has something to do with the valve timing - does this make the series 1 the superior engine for modification? The series 1 is more powerful out of factory?

Just gettin' in to Skylines sorry and looking to purchase one. Need to know if the s1 is the better base engine.

Cheers.

[axe s]

Not quite sure but i think series 2 were starting to bring in the Neo engines...

So different Head internals... cams, lifters...

that's what i thought anyway...

Edited January 15, 2009 by axe s

[lachlanw]

the only diff between series 1 and 2 was the coils . they got the ignitor inside them instead of a stand alone one . they made the same power and torque . and what is up with your stats above ? they were identical . and if you bring the neo into this at would be series 3. and they are FAR superior

[Primowave]

The specs are the same as those found at the site, haven't changed them or anything. Also the 1996 year S1 was priced lower than the S2... interesting..

[Axis-D]

Always go with the newer engine

[cmoney]

If you have the option, go Neo for sure in a R34.

The only difference i have noticed between the engines is the AFM. A S1 motor uses the sometimes troublesome "green label" AFM, the same as the 1 for my RB20 in my R32 GTS-T. The series 2 motor uses the better "pink label" AFM, as found in the R34 RB25DET NEO motor also. When my AFM crapped out, there weren't any green label 1s at the time, so i had a pink label retro fitted & the car has been going like a gun ever since. I think some GTR owners are starting to use these as an alternative to the Z32 upgrade also, not 100% on that 1 though.

Or better yet, do like im planning & put a RB25 NEO in a R32 lol.

[Turbotonic]

i was in the same positions as you are now three months ago and i ended up going with a series 2, because there value is higher for a reason

Edited January 18, 2009 by Turbotonic

[BigC1988]

I put a RB25det S2 in my R32. I don't understand how the coils work (get power ect.),was hoping someone can help.