300ZX buildup. UPDATE! 75PSI ATTAINED YO!

[:ninja:]

Originally Posted by Jehannum

Had the first dyno pulls post-break-in today at low boost (13 PSI). I data logged the whole thing, and will be analyzing and refining the tune. For today, it's pig rich up top (I pegged their rich-o-meter at 9:1 from about 5k on), and a little lean in the middle (it's at 16:1 from about 2.5k-3k RPM, yikes). All in all, I'm happy.

Observations:
1) If I lean the high end out to about 11:1, I can net 20-30HP.
2) these turbos pull hard straight to redline.
3) I'm maxing my MAF readings pretty badly. Solution.
4) I need to spend some more time trying to zero in on the right flow/latency values for the injectors to get that lean spot out of the middle.



Daddy needs a boost controller.

Be sure not to tell us how much power you're putting down.

[Jehannum]

Originally Posted by :ninja:

Be sure not to tell us how much power you're putting down.

Watch the video.

Or, for the lazy: 348HP / 363 TQ

[[H]ard|On]

What dyno was that?


Your car looks so happy from the front

[Jehannum]

Originally Posted by [H]ard|On

What dyno was that?


Your car looks so happy from the front

Motiva Performance

They own a Dynojet (the same dynojet I measured 317HP/338TQ on in 2005).

[Grazehell]

When all is said and done I expect nothing less than 425 WHP!

[GhEttOrAiD]

Originally Posted by Grazehell

When all is said and done I expect nothing less than 425 WHP!

75 whp from a tune?

well maybe after EBC

[Jehannum]

Originally Posted by GhEttOrAiD

75 whp from a tune?

well maybe after EBC

Like I said, I fully expect to gain 20-30 HP up top after I get the AFR back under control. After that, I can start thinking about going from 13 PSI up to 17-19 PSI. 425 HP is eminently doable in that range.

All I need to do to get AFRs correct is find the right injector flow value (trial and error - these Deatschwerks injectors are good, but they're nothing at all like the Nismo units). Oh, and I need an EPROM eraser (I think I'm going to get a UV pacifier sterilizer from Target to do that job).

[Jehannum]

I have my EBC now: an HKS EVC 5.

I've also had a bit of a setback in that my wiring harness has decided to play hide and go fuck itself.

So, yesterday I pulled the entire EFI harness (also: plenum and intake hoses) to start repair. Yes, I could just buy a replacement harness, but I'm trying to send my son to Preschool, so my discretionary fuck you money is gone for the time being.

While the engine harness is out I will:
a) fix the control line issue that broke the EFI and ignition coil relay trigger signal
b) move the power transistor unit (the bank of transistors that fire the coils) into the footwell, from the cam belt cover.
c) remove the control lines and power lines I don't need:

i) the PRVR solenoid - vacuum source that kicks on at warm start to prevent vapor lock
ii) the AIV solenoid (air source for the cats for cold performance)
iii) the EGR solenoid
iv) the boost cut solenoids (they haven't done anything since the turbo upgrade, since the wategate springs went from 7 to 12 PSI)

d) replace all the ground lines
e) replace the broken male/female pairs of connectors with nice new ones (probably GM weatherpaks):

i) O2 sensor (3 wire)
ii) variable timing control solenoid (2 wire)
iii) TPS (3 wire)

f) replace the broken connectors that are male or female only (plug into a solenoid in the engine bay or somesuch) with good replacements

i) IACV
ii) FICD (fast idle for AC)

g) re-route the ignition coil and injector lines so that they're less spidery, and easier to route through the middle of the plenum
h) integrate my wideband O2 sensors and boost controller harnesses into the main EFI harness.

[Loading]

Pulling like a freight train. Never understood that saying. Freight trains are fuckin slow and dreadfully underpowered.

Great looking project. Love the look of a 300ZX and you do not see many of them around any more.

[DopefishLives]

Originally Posted by Loading

Pulling like a freight train. Never understood that saying. Freight trains are fuckin slow and dreadfully underpowered.

Great looking project. Love the look of a 300ZX and you do not see many of them around any more.

When speaking in regards to force applied alone, they are actually quite a good reference. The load an average freight train carries as of 2004 is 3100 tons, at an average speed of 55 miles per hour.

[Jehannum]

Day 1: I've titled my art project "What the hell is wrong with my 300ZX?!"

[chuckybob]

Originally Posted by Jehannum

Day 1: I've titled my art project "What the hell is wrong with my 300ZX?!"

well, for starters, the wiring harness should be in the car

[Loading]

Originally Posted by DopefishLives

When speaking in regards to force applied alone, they are actually quite a good reference. The load an average freight train carries as of 2004 is 3100 tons, at an average speed of 55 miles per hour.

Force applied yes. Speed wise, no. Slow to accel, not great top speed, and you certainly don't get a feeling of speed when they accelerate.

[Jehannum]

Originally Posted by chuckybob

well, for starters, the wiring harness should be in the car

I need to figure out what's wrong with the bastard before I put it back in. Also, need to get the new ECU socketed to accept the massive fuel injectors (since the car ate my stock ECU).

[DopefishLives]

Originally Posted by Jehannum

Also, need to get the new ECU socketed to accept the massive fuel injectors (since the car ate my stock ECU).

Wut?