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July 20, 201016 yr

Hello guys

I have some results from the emance consult software that i would love to have a opinion on. I´m almost starting the task of 120.000 service with more stock stuff like a "new" ps pump, new axle bearing, etc..

Then now i got a cable and pluged my portable :) lets see what whappened:

Still trying to to find out why when i hit the brakes more agressively to stop on crossroad or something the car shuts down...

ECU: 23710-37P01

------------------------------------------------------------------------------

Power Balance Test Summary On 20-07-2010 17:55:00

Coolant Temperature: 178 Deg {F}

Idle Air: 35 %

Cylinder # 1

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 878 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 852 Rpm

Average RPM Drop Result... 26 Rpm

Highest RPM Drop... 78 Rpm

Amount Of Data Sampled When Cylinder Off... 192

Cylinder # 2

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 929 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 860 Rpm

Average RPM Drop Result... 69 Rpm

Highest RPM Drop... 141 Rpm

Amount Of Data Sampled When Cylinder Off... 192

Cylinder # 3

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 943 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 871 Rpm

Average RPM Drop Result... 72 Rpm

Highest RPM Drop... 143 Rpm

Amount Of Data Sampled When Cylinder Off... 192

Cylinder # 4

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 947 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 856 Rpm

Average RPM Drop Result... 91 Rpm

Highest RPM Drop... 147 Rpm

Amount Of Data Sampled When Cylinder Off... 192

Cylinder # 5

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 927 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 835 Rpm

Average RPM Drop Result... 92 Rpm

Highest RPM Drop... 139 Rpm

Amount Of Data Sampled When Cylinder Off... 192

Cylinder # 6

Cylinder On Stablized For 2 Seconds

Average RPM When Cylinder Stablized... 916 Rpm

Cylinder Off Sampled For 3 Seconds

Average RPM When Cylinder Is Off... 840 Rpm

Average RPM Drop Result... 76 Rpm

Highest RPM Drop... 153 Rpm

Amount Of Data Sampled When Cylinder Off... 192

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July 20, 201016 yr

Author

Oh also i have recorded the ecu content but it made a .rom file. Need to find a editor.

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July 20, 201016 yr

the reason the car stalls usaly is the plastic guard when using an aftermarket filter

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July 20, 201016 yr

Author

My car is 100% stock

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July 20, 201016 yr

could be the none return valve on the braje servo

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July 21, 201016 yr

It sounds as though you have a leak on your inlet / vacuum system which is generated via the plenum, which under normal running the engine copes with but as soon as you put extra demand on the system, i.e., braking, it causes the stall. I would check all pipes coming from the plenum right along their length to ensure none are perished, split or even just come off. It could also be your PCV valves needing replacing but this usually sends a few puffs of smoke out the back.

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New member (UK)

Welcome to the club

By Bones28 · 5 hours ago5 hr
Project Black Sunshine - The 300bhp NA

Thanks protoj, quality aftermarket headers for the NA are nonexistent these days. TDI has offered to do the math to determine ideal pipe lengths and a better collector and then fabricate on site. I’m looking at options for the back half, the HKS Hyper looks the most promising but a custom valved set up may be the way to go.

By madmarco · 6 hours ago6 hr
Project Black Sunshine - The 300bhp NA

Great post! Very interesting. So I've been dealing with similar concerns on my build as well before I decided to tear things down and make some changes. I have also been in talks with a local performance custom exhaust builder and discussed with him my concerns with the typical aftermarket header setups available for these cars. Is the same shop going to do the research for you or are you taking it to another company? I would be interested in testing some stuff as well or can provide further data if necessary for my race car NA 300ZX slicktop. Our projected power ceilings are not so dissimilar. My machinist shop and I are currently still in the build phase for the new setup.

By protoj · 20 hours ago20 hr
New member (UK)

You’ll likely find the cabling around the knock sensor rather than the sensor itself is faulty. If I remember correctly the stock knock sensor is only activate in a certain portion of the rev range, ironically not at the most dangerous point. Basically it’s pretty crude. I deleted mine and fitted a resistor to mimic its function, very common modification.

By Stephen · 22 hours ago22 hr
My daughter calls it Toothless the Dragon: My ‘95 TT Z

What a journey it’s been. Yesterday, 4 years and 362 days since the terminal engine failure of my EPR “built” VG30DETT, my Z was back on the dyno.
I’m happy to report the engine that I specced, prepped and assembled survived and took everything that was thrown at it, with oil pressure being reported as “fantastic”. For a “hobbyist” I should be proud.

But I didn’t get the dump of dopamine I was expecting at the conclusion of the day, that rush of “I did it”. Instead I got the cold sweat of dread when Romain of RaceCal Ltd came off the dyno to debrief me. Fundamentally, everything is fine and the Z has a solid tune, but not without issue…. and I think it’s that very BUT that has taken the sheen off was a good day.

Firstly, the engine has a fuelling imbalance between banks that shifts dependant on load. I have a vague recollection that I’ve had this problem before and never got to the bottom of it.
That in combination with an issue with one of the hub dyno’s having a peculiar loading issue, brought about the conclusion of the day in the interests of safety. And I’m completely content with that decision!

A few other minor issues including a small oil leak that needs to be found as well as the curse of the ATi damper PS belt issue, meaning a 85 mile drive home with no PS.

I think the final factor in my overall post dyno emotions are that I thought i had everything in place to get the optimum output for this setup….. and I don’t. I need to invest time in making proper intercooler ducting to get that IAT recovery and efficiency to be able to make back to back runs. I need to add a second fuel pump to give me more head room to allow the potential maximise the 2860 turbos. I need to find the cause of this imbalance to remove any risk of misfuelling so that tune can be absolutely bang on to really optimise this setup. So, the journey isn’t over yet….. more work, more learning, more money 😂😂😂.

Just a quick one to say thanks. Thanks to Romain of RaceCal Ltd for his time, for his ability to recognise my level of understanding and communicate to me where I can solve issues and make improvements. I look forward to working with you again! #vg30dett #z32 #300zx

(And depending on your chosen calculation, that’s 640 hp and 550 lbs ft at the flywheel, roughly)

By nickz32 · Yesterday at 15:341 day

Experienced people can take a look?

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Project Black Sunshine - The 300bhp NA

Project Black Sunshine - The 300bhp NA

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My daughter calls it Toothless the Dragon: My ‘95 TT Z

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