Z31 Introduction

[z31]

I have been thinking about this. I took a look at the rpm drop on each shift, and this is what i came up with:

gear 1-2....1700 rpm

gear 2-3....1100 rpm

gear 3-4....800 rpm

gear 4-5.... 500 rpm

This is a dyno sheet of the same setup in another z31. The only differance is im using e85 at 15 lbs of boost with 9:1 compression pistons and, he is using 93oct at 20 lbs of boost with 7.8:1 compression pistons.

[weshole]

Im assuming the Green is the HP and the blue is the TQ. If that's the case, theres a lot more rpms avail.

[beachbum_jon]

judging by that dyno graph, and given that your car makes the same power at the same rpms, shifting at 6200 is about perfect IMO. Why go past that when your power drops off, when you can shift and be right back in the power again?

[z31]

weshole;314903 wrote:
Im assuming the Green is the HP and the blue is the TQ. If that's the case, theres a lot more rpms avail.

Yes.

[Bookem]

weshole;314903 wrote:
Im assuming the Green is the HP and the blue is the TQ. If that's the case, theres a lot more rpms avail.

I'm guessing since Jason has higher compression and less boost his power band is lower rpm just a bit more power.

[z31]

Im currently installing manual trans number 3

[JN210]

fun? why do they keep breaking?

[funky_monkey58]

JN210;317765 wrote:
fun? why do they keep breaking?
Because the big doof can't drive.

[z31]

^^^^Look who's talking!

[z31]

Next victom. This is a 87-89 Z31 Turbo: FS5R30A: Nissan Turbo 5spd

[z31]

JN210;317765 wrote:
fun? why do they keep breaking?

Jeff, im sure its the hard hitting DXD stage 6 clutch and the big power gain from the motor that is destroying the Borg Warner T-5s. The DXD stage 3 saved on the T-5s because it slipped a little when it engaged.

[JN210]

oh ok lol

[z31]

New parts. Precision 880cc fuel injectors.

[funky_monkey58]

Those are kinda small don't you think?

Oh yeah it will still be slow!