Jump to content
SAU Community

Recommended Posts

4 hours ago, GTSBoy said:

Why would you want to f**k with the efficiency of the compressor in that way?

See also: Dose. 

"Hey man make my car sound broken cause it is"

11 minutes ago, Kinkstaah said:

Sorry when I said 'defective' I didn't mean "get defected"

I mean broken, working improperly. Literally sounds like a car running bad because it is a car running bad... whats next, making the car sound like it's spun rod bearings for clout?

Rotary idle brap tune brah.

4 hours ago, IM-32-FK said:

I thought it was only a sound vanity mod

Yeah, like, just drill holes from the discharge point of the compressor wheel back to the inlet.....nah that won't f**k up the compressor efficiency at all.

It is not a smart thing to do.

49 minutes ago, Kinkstaah said:

I mean broken, working improperly. Literally sounds like a car running bad because it is a car running bad...

So all the factory trucks and buses that have wild single note dose are running bad?

Not sure running bad and dose are related in anyway tbh.

52 minutes ago, Kinkstaah said:

See also: Dose. 

"Hey man make my car sound broken cause it is"

Lol .. I'm not on that T51 mod band wagon.

No silly mods on my compressor cover except for a welded on cast elbow on the outlet.

Just so we're clear, we're talking about that sound that you get when you back off a turbo or supercharger without any kind of release valve?

That sounds broken to me. Because it is, in the applications that it is used. You like it, to me it sounds like someone is driving around with rod knock and thinking it sounds sick because... it's ... broken-sounding?

8 hours ago, Kinkstaah said:

Just so we're clear, we're talking about that sound that you get when you back off a turbo or supercharger without any kind of release valve?

That sounds broken to me. Because it is, in the applications that it is used. You like it, to me it sounds like someone is driving around with rod knock and thinking it sounds sick because... it's ... broken-sounding?

Plenty of high end race cars run no bov, also the 20det c33's & a31's had no bov from factory 

Screen Shot 2022-12-12 at 9.47.16 am.png

Edited by WMDC35
  • Like 1
8 hours ago, Dose Pipe Sutututu said:

A push rod V8 with 2 valves per cylinder sounds broken to me.

All subjective 😊

It is subjective! FWIW I am on the fence about bad idling and V8's literally running like shit at idle. 😛 I much prefer an equal length header LS1 if packaging allows and a nice smooth idle...

I suppose yes, cars run no bov before they were invented. Not having a bov for the original items list for OP is at least period correct. As is the T51.

Now all we need is some frosted tips, and white rimmed oakleys and go full 2006.

  • Haha 1
8 hours ago, Dose Pipe Sutututu said:

A push rod V8 with 2 valves per cylinder sounds broken to me.

All subjective 😊

Speaking of making things worse to sound better, I tried your trick of turning VCT on at idle but didn't notice any change in the level of how hectic my idle sounds. Is there anything else you played with? ...or is my VCT broken? lol

1 hour ago, Murray_Calavera said:

Speaking of making things worse to sound better, I tried your trick of turning VCT on at idle but didn't notice any change in the level of how hectic my idle sounds. Is there anything else you played with? ...or is my VCT broken? lol

You need to punch a timing hole into the zero demand table so the motor becomes inefficient at the idle RPM.

I'll post up screen shots in a bit 😎

  • Like 1
2 hours ago, Dose Pipe Sutututu said:

You need to punch a timing hole into the zero demand table so the motor becomes inefficient at the idle RPM.

I'll post up screen shots in a bit 😎

I suppose this is adding value to this thread too :) 

image.thumb.png.09a30dfbfc61370aa6d51167ba8144e7.png

Note the scaling on the RPM axis too, you pretty much want to close up the throttle so the revs drop a bit quicker and once it kisses the cell with higher timing it will hop into the lower load cells and the RPM will drop again.

image.thumb.png.953945ad5ac119bd5a4272afc794fa8d.png

image.thumb.png.8cdd530678de0011fc001b187a5b76c3.png

 

Also one thing to note, you want to not overly make the idle control closed loop too aggressive as it will end up hunting. This seems to work for me, however I did notice after a hot session on the GP Circuit the car was hunting a bit (I suspect I needed to close up the throttle a bit more).

image.thumb.png.92e7df6025d989e0805b1007cab9c7f3.png

image.thumb.png.ad552e8079ec2d5bfc32e620862c513e.png

 

Sure this is completely stupid, but so is a T51 SPL compressor mod. Some would argue modding an old car is stupid too (I agree here) and to just buy a F80 M3.

We mod these Skylines because we are not normal.

  • Like 2
On 12/11/2022 at 8:02 AM, hypergear said:

Nistune with Z32 AFM will be fine for the application, I would install the AFM in cooler piping.

I just wanted to bring this slightly back on track, and also disagree slightly with Tao. If Tao was talking about the Z32 AFM in the cooler piping - I would not do that. The old Hitachi plastic tube AFMs are not supposed to be put into pressure pipework. They are not really mechanically strong enough for it. The modern card style AFMs are easy to fit to pipework and everything about that installation is strong enough to handle boost.

48 minutes ago, GTSBoy said:

I just wanted to bring this slightly back on track, and also disagree slightly with Tao. If Tao was talking about the Z32 AFM in the cooler piping - I would not do that. The old Hitachi plastic tube AFMs are not supposed to be put into pressure pipework. They are not really mechanically strong enough for it. The modern card style AFMs are easy to fit to pipework and everything about that installation is strong enough to handle boost.

Funny that back in 2008 my blue 32 I had a Z32 AFM in the pipework after intercooler with a Power FC pro and HKS T51. Not the entire AFM, just the hotwire sensor part in the alloy pipework and was setup like this from Japan. The car actually ran really well with it running 28psi and mid 10s on 98, but still got 10L/100km.

Then the stock 20+ balancer failed and destroyed the engine 👍

But still...it did work.

  • Like 1
3 minutes ago, GTSBoy said:

Hack up and epoxy bodge job? Nasty.

Not quite that bad with epoxy, but cut just enough to allow it to sit on the pipe then hose clamped around the pipe either side of the remaining curved section sealed with a rubber gasket. Didn’t leak!

I suspect it was done to have the launch control on the Apexi pro ecu as there was no pro d jetro map sensor version.

How times have changed.

Just now, GTSBoy said:

That actually sounds worse!

Don't you dare say that about precision Japanese engineering !

It does prove how much a single Z32 afm could handle though

  • Like 1
  • Haha 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I had 3 counts over the last couple of weeks once where i got stranded at a jdm paint yard booking in some work. 2nd time was moving the car into the drive way for the inspection and the 3rd was during the inspection for the co2 leak test. Fix: 1st, car off for a hour and half disconnected battery 10mins 4th try car started 2nd, 5th try started 3rd, countless time starting disconnected battery dude was under the hood listening to the starting sequence fuel pump ect.   
    • This. As for your options - I suggest remote mounting the Nissan sensor further away on a length of steel tube. That tube to have a loop in it to handle vibration, etc etc. You will need to either put a tee and a bleed fitting near the sensor, or crack the fitting at the sensor to bleed it full of oil when you first set it up, otherwise you won't get the line filled. But this is a small problem. Just needs enough access to get it done.
    • The time is always correct. Only the date is wrong. It currently thinks it is January 19. Tomorrow it will say it is January 20. The date and time are ( should be ! ) retrieved from the GPS navigation system.
    • Buy yourself a set of easy outs. See if they will get a good bite in and unthread it.   Very very lucky the whole sender didn't let go while on the track and cost you a motor!
    • Well GTSBoy, prepare yourself further. I did a track day with 1/2 a day prep on Friday, inpromptu. The good news is that I got home, and didn't drive the car into a wall. Everything seemed mostly okay. The car was even a little faster than it was last time. I also got to get some good datalog data too. I also noticed a tiny bit of knock which was (luckily?) recorded. All I know is the knock sensors got recalibrated.... and are notorious for false knock. So I don't know if they are too sensitive, not sensitive enough... or some other third option. But I reduced timing anyway. It wasn't every pull through the session either. Think along the lines of -1 degree of timing for say, three instances while at the top of 4th in a 20 minute all-hot-lap session. Unfortunately at the end of session 2... I noticed a little oil. I borrowed some jack stands and a jack and took a look under there, but as is often the case, messing around with it kinda half cleaned it up, it was not conclusive where it was coming from. I decided to give it another go and see how it was. The amount of oil was maybe one/two small drops. I did another 20 minute session and car went well, and I was just starting to get into it and not be terrified of driving on track. I pulled over and checked in the pits and saw this: This is where I called it, packed up and went home as I live ~20 min from the track with a VERY VERY CLOSE EYE on Oil Pressure on the way home. The volume wasn't much but you never know. I checked it today when I had my own space/tools/time to find out what was going on, wanted to clean it up, run the car and see if any of the fittings from around the oil filter were causing it. I have like.. 5 fittings there, so I suspected one was (hopefully?) the culprit. It became immediately apparent as soon as I looked around more closely. 795d266d-a034-4b8c-89c9-d83860f5d00a.mp4       This is the R34 GTT oil sender connected via an adapter to an oil cooler block I have installed which runs AN lines to my cooler (and back). There's also an oil temp sensor on top.  Just after that video, I attempted to unthread the sensor to see if it's loose/worn and it disintegrated in my hand. So yes. I am glad I noticed that oil because it would appear that complete and utter catastrophic engine failure was about 1 second of engine runtime away. I did try to drill the fitting out, and only succeeded in drilling the middle hole much larger and now there's a... smooth hole in there with what looks like a damn sleeve still incredibly tight in there. Not really sure how to proceed from here. My options: 1) Find someone who can remove the stuck fitting, and use a steel adapter so it won't fatigue? (Female BSPT for the R34 sender to 1/8NPT male - HARD to find). IF it isn't possible to remove - Buy a new block ($320) and have someone tap a new 1/8NPT in the top of it ($????) and hope the steel adapter works better. 2) Buy a new block and give up on the OEM pressure sender for the dash entirely, and use the supplied 1/8 NPT for the oil temp sender. Having the oil pressure read 0 in the dash with the warning lamp will give me a lot of anxiety driving around. I do have the actual GM sensor/sender working, but it needs OBD2 as a gauge. If I'm datalogging I don't actually have a readout of what the gauge is currently displaying. 3) Other? Find a new location for the OEM sender? Though I don't know of anywhere that will work. I also don't know if a steel adapter is actually functionally smart here. It's clearly leveraged itself through vibration of the motor and snapped in half. This doesn't seem like a setup a smart person would replicate given the weight of the OEM sender. Still pretty happy being lucky for once and seeing this at the absolute last moment before bye bye motor in a big way, even if an adapter is apparently 6 weeks+ delivery and I have no way to free the current stuck/potentially destroyed threads in the current oil block.
×
×
  • Create New...