I finally got around to dynoing my Z31. I've recently shared my results on Z31 Performance, 300ZXClub, etc. But I feel its necessary I share them here as well.
I do believe this is the most power recorded on a Z31 with:
Stock bottom end
Stock Ignition Coil
My current mods are as follows:
Stock 86T bottom end (custom divoted pistons from Branson 2010 )
Stock Ignition Coil
Mildy ported heads
Schneider 274 Cams
Schneider 110lb valve springs
FET MLS HG
2.5" IC Piping
Godspeed 3" Intercooler
Tial 38MM Wastegate
2x External Walbro 255
-6 AN fuel lines
StreetFighter Tubular Exhaust Manifolds
Precision Billlet 6262
I think that's everything notable...I made several pulls honestly only reason why we stopped was because I was starting to get boost creep in the upper RPM. I believe the 38MM wastegate may be a tad small for this setup. I'll either run 2 or go with a larger single.
Here's a few of the graphs overlayed. A couple of the runs we let out a little early as we were fixing the AFR mixture.
1 of the runs pictured below was with boost controller on. You can clearly see the curve is broad as expected as boost increased properly per RPM. These were cut off a little short as it ran a little lean up top and I was fixing the AFR mixture.
The remaining graphs shown are showing wastegate only. Where you see the sharp increases in power over say 400 whp, boost was creeping. I believe the 38mm WG is either too small, the wrong pitch, or the divided entry to the WG is creating more back pressure. Possibly the 90* angle dumptube is at fault.
The stock MAF may still have room left. The highest voltage recorded was 4.809 during one of the pulls where the car made 528HP. Unfortunately I don't have the logs from the 540+ run as my laptop battery died.
Video of one of the pulls:
Results of any interesting tests done with or related to Nistune.
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