Announcing TopgunZ ACE Supercharger Kit!

TopgunZ · 06-19-2021, 07:34 PM

Quote:

Originally Posted by redondoaveb

He mentioned 18 on Facebook, definitely over the threshold

If this is definitely over it, what's the threshold?

Weren't you over 17 for years?

Your sig states 19.5 and I don't believe that was built.

Just trying to normalize the data.

redondoaveb · 06-19-2021, 08:15 PM

Quote:

Originally Posted by TopgunZ

If this is definitely over it, what's the threshold?

Weren't you over 17 for years?

Your sig states 19.5 and I don't believe that was built.

Just trying to normalize the data.

I was told getting above 16 psi is getting into the danger zone. Of course there's no magic number. I think a lot has to do with how often you're in that zone. I was making 17 for a couple years but I don't put a lot of miles on my car and I wasn't at peak boost that often. Since I haven't torn apart my blown motor yet, I'm not sure what caused the bottom end failure but I'm pretty sure it would have lifted the heads if the bottom end didn't fail.

What psi was your rotrex build making when it lifted the heads?

DrBacon · 06-20-2021, 01:16 PM

Quote:

Originally Posted by Megamarines

The run maybe lasted forty-five seconds at full WOT.

Were you going 500mph? How do you do WOT for 45+ seconds?!

Spooler · 06-20-2021, 02:14 PM

The cylinders still moving around after an install of the RJM closed deck system has been confirmed. I am not going to mention any names because I don't have his permission to do so. It was confirmed the first of the year in 2020 when I was searching for a solution. I ask him to look.

I have seen someone do the following to try and get the headgaskets to hold with no success.

RJM closed deck
LA sleeves that protruded higher than the deck. How much I do not know.
Headgasket, unknown.
ARP 625 head studs
Fire ringed head

Spooler · 06-20-2021, 03:29 PM

So in short, the problem is in the open deck block itself. There is an inherent defect that allows the cylinders to move under higher than stock cylinder pressure. Is what it is. Any more questions, just ask. I may or may not know the answers.

redondoaveb · 06-20-2021, 04:17 PM

Quote:

Originally Posted by Spooler

So in short, the problem is in the open deck block itself. There is an inherent defect that allows the cylinders to move under higher than stock cylinder pressure. Is what it is. Any more questions, just ask. I may or may not know the answers.

Didn't I read that closed deck blocks are getting head lift also?

Spooler · 06-20-2021, 04:47 PM

Quote:

Originally Posted by redondoaveb

Didn't I read that closed deck blocks are getting head lift also?

Yes, the only way to fix it is to do the SOHO solution or Mazworx solution.

Elmo370z · 06-20-2021, 04:59 PM

Quote:

Originally Posted by redondoaveb

Didn't I read that closed deck blocks are getting head lift also?

Yup. Personally saw once let go few weeks back on the dyno.

Spooler · 06-20-2021, 05:05 PM

You can't get the CSS or RJM closed deck's in tight enough to keep the cylinders from moving. They move. I knew that the first of 2020. The SOHO mod allows it to stay alive with the CSS system. RJM is a lost cause.

JVerge5363 · 07-25-2021, 01:56 PM

Hey Guys,

When I first had my kit installed I was seeing 11-12 psi of boost on my gauge and now the max I get is 10 psi. Not sure if I have a boost leak or getting belt slip. I did notice belt residue on the hood. Not sure if that is normal or not. I had my first SC service at 2500 miles and they installed a new belt at that time. I have about 4000 miles on the kit since then. Any ideas or suggestions would be greatly appreciated. Thanks

redondoaveb · 07-25-2021, 02:36 PM

Quote:

Originally Posted by JVerge5363

Hey Guys,

When I first had my kit installed I was seeing 11-12 psi of boost on my gauge and now the max I get is 10 psi. Not sure if I have a boost leak or getting belt slip. I did notice belt residue on the hood. Not sure if that is normal or not. I had my first SC service at 2500 miles and they installed a new belt at that time. I have about 4000 miles on the kit since then. Any ideas or suggestions would be greatly appreciated. Thanks

You've got bad belt slip. From the looks of the residue on the hood, it appears to be coming from the serpentine side. Is that correct? Do you have Togunz's extra tensioner pulley?

JVerge5363 · 07-25-2021, 03:21 PM

Quote:

Originally Posted by redondoaveb

You've got bad belt slip. From the looks of the residue on the hood, it appears to be coming from the serpentine side. Is that correct? Do you have Togunz's extra tensioner pulley?

When I close the hood it appears that it would be coming from the belt in front of the bracket closest to the nose of the car. Not sure if I have Topgunz's extra tensioner pulley. RT Tuning ordered the kit and did my install. Maybe you can tell from the pics?

redondoaveb · 07-25-2021, 04:01 PM

Quote:

Originally Posted by JVerge5363

When I close the hood it appears that it would be coming from the belt in front of the bracket closest to the nose of the car. Not sure if I have Topgunz's extra tensioner pulley. RT Tuning ordered the kit and did my install. Maybe you can tell from the pics?

Correct. The belt in the front is the serpentine side. You do have the extra tensioner pulley also (see the pulley I circled in red). I'm not sure why you're getting so much slip. Have you contacted Aaron (Topgunz) to see what he thinks?

DrBacon · 07-25-2021, 05:41 PM

Yeah that's a TON of belt slip, especially considering you have that better tensioner position than I think most of us have.

I thought the ACE kit came with RPM belts but both of yours appears to be the non-RPM version. Did they downgrade the belts when they changed them or you have always had the non-RPM version?

Edit: I just noticed the tensioner is in a different spot between the two pictures, why is that? What's the difference between the first and second pictures?

redondoaveb · 07-25-2021, 06:03 PM

Quote:

Originally Posted by DrBacon

Yeah that's a TON of belt slip, especially considering you have that better tensioner position than I think most of us have.

I thought the ACE kit came with RPM belts but both of yours appears to be the non-RPM version. Did they downgrade the belts when they changed them or you have always had the non-RPM version?

Edit: I just noticed the tensioner is in a different spot between the two pictures, why is that? What's the difference between the first and second pictures?

Did the ACE kit come with a serpentine RPM belt? I thought it was just the sc belt. Good catch on the tensioner pulley, I didn't notice that.

06-20-2021, 05:05 PM	#9 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,175 Drives: 2013 Nismo 370z Rep Power: 2684395	You can't get the CSS or RJM closed deck's in tight enough to keep the cylinders from moving. They move. I knew that the first of 2020. The SOHO mod allows it to stay alive with the CSS system. RJM is a lost cause. Last edited by Spooler; 06-20-2021 at 05:08 PM.

07-25-2021, 05:41 PM	#14 (permalink)
DrBacon Enthusiast Member Join Date: Nov 2016 Location: Washington Posts: 286 Drives: 2014 Nismo Rep Power: 27366	Yeah that's a TON of belt slip, especially considering you have that better tensioner position than I think most of us have. I thought the ACE kit came with RPM belts but both of yours appears to be the non-RPM version. Did they downgrade the belts when they changed them or you have always had the non-RPM version? Edit: I just noticed the tensioner is in a different spot between the two pictures, why is that? What's the difference between the first and second pictures? Last edited by DrBacon; 07-25-2021 at 05:44 PM.

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06-20-2021, 02:14 PM	#4 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,175 Drives: 2013 Nismo 370z Rep Power: 2684395	The cylinders still moving around after an install of the RJM closed deck system has been confirmed. I am not going to mention any names because I don't have his permission to do so. It was confirmed the first of the year in 2020 when I was searching for a solution. I ask him to look. I have seen someone do the following to try and get the headgaskets to hold with no success. RJM closed deck LA sleeves that protruded higher than the deck. How much I do not know. Headgasket, unknown. ARP 625 head studs Fire ringed head

06-20-2021, 03:29 PM	#5 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,175 Drives: 2013 Nismo 370z Rep Power: 2684395	So in short, the problem is in the open deck block itself. There is an inherent defect that allows the cylinders to move under higher than stock cylinder pressure. Is what it is. Any more questions, just ask. I may or may not know the answers.