[Build Thread] -- Journey to 700+ WHP [Supercharger]

[cupcakez]

Originally Posted by BildoDabbins

Wow just saw this post and your Z is amazing. Way too many questions,but I'll just ask one lol. I saw you got your exhaust work done at mufflertech in Sac everyone keeps referring me there. There was another nizzy on bags that came into my shop and referred me to mufflertech. How do you like their work?

Do you have exhaust clips?

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They dont do things just for the money. I've been to MufflerTech multiple times and they charge very fairly. Also, they are very nice and try their best to adhere to customer requests, will also tell you that they cant do something if it's not what their shop offers!

I don't have any exhaust clips unfortunately. The work I had done at muffler tech was on my RED Z before I crashed it and totaled it, the exhaust on my car now is just a stillen full CBE which actually came with the car when I bought it off the lot used.

I'd go to Muffler tech for any exhaust needs. They also do all kinds of custom work too, so the imagination is your limit when going to get work done by them!!

[BildoDabbins]

Originally Posted by cupcakez

They dont do things just for the money. I've been to MufflerTech multiple times and they charge very fairly. Also, they are very nice and try their best to adhere to customer requests, will also tell you that they cant do something if it's not what their shop offers!



I don't have any exhaust clips unfortunately. The work I had done at muffler tech was on my RED Z before I crashed it and totaled it, the exhaust on my car now is just a stillen full CBE which actually came with the car when I bought it off the lot used.



I'd go to Muffler tech for any exhaust needs. They also do all kinds of custom work too, so the imagination is your limit when going to get work done by them!!

That's awesome that you're familiar with them too you're like the 4th person to recommend them now I just need to go there when I get more money after I put new tires on tho...

So are you still in Sacramento?

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[cupcakez]

Originally Posted by BildoDabbins

That's awesome that you're familiar with them too you're like the 4th person to recommend them now I just need to go there when I get more money after I put new tires on tho...

So are you still in Sacramento?

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Been living in Elk Grove since 1998!!
You're more than welcome to check out my Z if you like!

[BildoDabbins]

Originally Posted by cupcakez

Been living in Elk Grove since 1998!!

You're more than welcome to check out my Z if you like!

That sounds great I'd love to come by and talk cars lol. I'm new to the area and I've been wanting to meet more people with import cars.it seems like everyone in this area needs a cammed v8 or you aren't doing something right lmao.

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[cupcakez]

Hey guys! Been a while since I've been on these forums and updated this thread.

Good news is that the car has been running fine, no known issues for at least 7 - 8 months now ever since it was fixed by my mechanic in February.

One thing I just wanted to touch upon and ask about is the following:

Okay. I just took the vehicle for a drive. Here's what I found:


(1) It only makes a rapid tapping noise when it's in the same gear and the revvs get higher (the tapping gets faster as the revvs get higher in the same gear)


(2) As soon as it changes gear (via automatically or manually), the tapping stops and kind of "resets" itself into the next gear. And in the next gear up, it will make the tapping noise again until it either switches to a higher gear or stays at an idle RPM.


(3) I tried manual mode, and stayed in gear 1 for a while and the tapping noise got faster and louder as the RPM's went up.


(4) After warming up the engine's oil to about 200 - 220 degrees from a lot of stop and go driving in the city, I parked the car and revved it in park mode and I could hear the rapid tapping noise again --> The higher RPM I went, the faster it got.


(5) I tried the same thing as (4) in Neutral mode, and got the exact same result.


(6) I tried to find out where the tapping noise was coming from exactly, but I can't really tell with just me in the car and without anyone else to help me listen to find the possible source(s) of it.


(7) The tapping noise does not occur in idle, park mode, neutral mode, or just rolling down the hill. ONLY when I am raising the RPM's while the vehicle is fully turned on.


NOTE: I've had this tapping noise for the longest time now, and I didn't think anything of it. It hasn't caused any known vital negative or positive issues, it's just a random noise that is just ... annoying because I don't know where it is coming from.


Any ideas on what this could be? Maybe just something neutral is hitting against something else which is why I haven't had any issues with the car since Feb? Or nah?

I have a short video clip of the noise example I'm talking about, but I don't know how to upload videos here,

[Ghostvette]

A noise that increases in frequency or level as RPM changes, is usually indicitive of a problem in the engine. Haiako over to Seb at Specialty Z and have them diagnose & fix it.


Repeating: GO TO SEB NOT THE LOCAL SHADE TREE.......

[Chuck33079]

Originally Posted by Ghostvette

A noise that increases in frequency or level as RPM changes, is usually indicitive of a problem in the engine. Haiako over to Seb at Specialty Z and have them diagnose & fix it.


Repeating: GO TO SEB NOT THE LOCAL SHADE TREE.......

Change oil, look for metal chunks or glitter
Oil Analysis
Compression Test
Leakdown Test

What you describe sounds like rod knock. Which means you may need to make plans to tap into your emergency fund for a new motor.

[jchammond]

Originally Posted by Chuck33079

Change oil, look for metal chunks or glitter
Oil Analysis
Compression Test
Leakdown Test

What you describe sounds like rod knock. Which means you may need to make plans to tap into your emergency fund for a new motor.

Get oil analysis, as this sounds like a rod bearing
But you stated it’s been doing it a long time & once rod bearings start making noise
Hopefully you’ll find that it might be something vibrating & causing the noise

[JARblue]

with those guys above.

But if you need some more advice to ignore, just let me know

[Optimiser]

Originally Posted by JARblue

with those guys above.

But if you need some more advice to ignore, just let me know

Poor Cupcakez, he always seems to do it hard

[SouthArk370Z]

Possibly just normal valvetrain noise. Switch to an ester oil and it may quiet down.

[jwick]

Originally Posted by SouthArk370Z

Possibly just normal valvetrain noise. Switch to an ester oil and it may quiet down.

With his luck track record, I wouldn’t risk it. He needs an oil analysis and compression test to check the health of his engine.

[cupcakez]

Originally Posted by SouthArk370Z

Possibly just normal valvetrain noise. Switch to an ester oil and it may quiet down.

Turns out it was indeed normal valvetrain noise.
Asked multiple people to listen to it while I revv'ed the engine and they all said it was normal. Including my mechanic.

It is not rod knock, because since it was there since Feb and it's been running perfect since then, it would have metal flakes during oil changes being shown.

However, I did an oil change today and no metal flakes was seen or discovered. It was all clean. I did put 5w30 Liqui Moly in there as it was recommended to me to help with the Valvetrain noise -- as it seems to have a detergent in there that helps clean things. So I'll see how that goes.

Other than that, I've done multiple logs of the car being driven lately and all logs look perfectly fine.

The battery was disconnected for 30 minutes and the brake pedal held down for 10 seconds after DC'ing the battery and it reset everything (including the SES light that was on for no reason since ECUtek wouldn't log any codes no matter how many tries or angles I tried to get it to show me a code).

Light never came on again since then, the car feels as it should, and I was told I never heard the noise or noticed it even though it was always there.
I had only noticed it starting Feb of 2020 and since it's been driving fine ever since then, the only plausible conclusion is that it is, indeed, valvetrain noise.

Once I noticed it, I never go back to not noticing it!

Car is all good now. Thanks everyone for your support and feedback, appreciate it!

Car's been running strong since Feb and hopefully can make it to Feb for 1 year+++ of running without any major issues / issues at all x)

[Chuck33079]

Originally Posted by cupcakez

Car's been running strong since Feb and hopefully can make it to Feb for 1 year+++ of running without any major issues / issues at all x)

Still running strong?

[Elmo370z]

Originally Posted by cupcakez

Turns out it was indeed normal valvetrain noise.
Asked multiple people to listen to it while I revv'ed the engine and they all said it was normal. Including my mechanic.

It is not rod knock, because since it was there since Feb and it's been running perfect since then, it would have metal flakes during oil changes being shown.

However, I did an oil change today and no metal flakes was seen or discovered. It was all clean. I did put 5w30 Liqui Moly in there as it was recommended to me to help with the Valvetrain noise -- as it seems to have a detergent in there that helps clean things. So I'll see how that goes.

Other than that, I've done multiple logs of the car being driven lately and all logs look perfectly fine.

The battery was disconnected for 30 minutes and the brake pedal held down for 10 seconds after DC'ing the battery and it reset everything (including the SES light that was on for no reason since ECUtek wouldn't log any codes no matter how many tries or angles I tried to get it to show me a code).

Light never came on again since then, the car feels as it should, and I was told I never heard the noise or noticed it even though it was always there.
I had only noticed it starting Feb of 2020 and since it's been driving fine ever since then, the only plausible conclusion is that it is, indeed, valvetrain noise.

Once I noticed it, I never go back to not noticing it!

Car is all good now. Thanks everyone for your support and feedback, appreciate it!

Car's been running strong since Feb and hopefully can make it to Feb for 1 year+++ of running without any major issues / issues at all x)

You should hear spoolers motor if you think what you have is loud