Supercharger Upgrade SCI -> SI

NissanTracker · 06-09-2022, 12:26 PM

Quote:

Originally Posted by redondoaveb

I did a comparison with 928's billet impeller and I actually lost low/midrange power and to top it off, one of the vanes on the impeller broke off and got sucked into my intercooler. I'd avoid aftermarket impellers and go with the Vortech's Si impeller and I'm not a big fan of Vortech. Terrible customer/technical service

Good to know! I must admit, I'm on a stock HR block and I went 1 pulley size down (serp side) and running the S&G velocity screen. Should i be worried about the extra 100cfm on a stock block?

Apparently belt slippage is something I need to look into. I am running the TBATT idler tensior and the supplied Gates belt. I haven't done anything on the supercharge side. What is today's solution without going Cog?

Edit: Just went through some old posts. Are these still valid?

Is this K080220RPM the actual charger size small belt?

https://www.jegs.com/i/Gates/465/K080220RPM/10002/-1

https://vortechsuperchargers.com/pro...ant=7811182081

How did your wastegate experiment go? I only have 93 here and no e85. If this think is going to go past 13-14psi, maybe this is something i should look into. Seb will be tunning me as well

Fuel return arrived yesterday, so i'll be installing this with an aero 340 pump + rewire while the SI upgrade is being done.

redondoaveb · 06-09-2022, 03:54 PM

Quote:

Originally Posted by NissanTracker

Good to know! I must admit, I'm on a stock HR block and I went 1 pulley size down (serp side) and running the S&G velocity screen. Should i be worried about the extra 100cfm on a stock block?

Apparently belt slippage is something I need to look into. I am running the TBATT idler tensior and the supplied Gates belt. I haven't done anything on the supercharge side. What is today's solution without going Cog?

Edit: Just went through some old posts. Are these still valid?

Is this K080220RPM the actual charger size small belt?

https://www.jegs.com/i/Gates/465/K080220RPM/10002/-1

https://vortechsuperchargers.com/pro...ant=7811182081

How did your wastegate experiment go? I only have 93 here and no e85. If this think is going to go past 13-14psi, maybe this is something i should look into. Seb will be tunning me as well

Fuel return arrived yesterday, so i'll be installing this with an aero 340 pump + rewire while the SI upgrade is being done.

You're on an HR block, not VHR.? If so, then I don't know what the HR block will hold. Good question for Seb

I wouldn't go cog on the supercharger side. "Z"en on the forum or he's @minized123456 on IG has a great tensioner set up for the supercharger side (see attached photo).

The wastegate set up worked perfectly but another good question for Seb if he thinks you'd need adjustable boost.

You may want to talk with Seb about your fuel pump and injector size too

NissanTracker · 06-09-2022, 07:12 PM

Quote:

Originally Posted by redondoaveb

You're on an HR block, not VHR.?

Yes, this is my 07 Nismo... I don't think i'll touch a vortech on my 14 nismo. I've thrown too much money on this V3 setup to get it right. Too noisy and tacky. I'm in FI TT kit prices at this point ;-)

Quote:

Originally Posted by redondoaveb

"Z"en on the forum or he's @minized123456 on IG has a great tensioner set up for the supercharger side (see attached photo).

Hmmm... peeeerrrrrrrrty. I'll check it out. Charger is getting pulled out anyways

Quote:

Originally Posted by redondoaveb

The wastegate set up worked perfectly but another good question for Seb if he thinks you'd need adjustable boost.
too

Yeah... the HR on 93 pump gas will only go for 12 psi safely. I just want to shift the power curve to the left. I don't see why a manual boost controller just set to 12psi shouldn't do it. But, there are some cool features on those Greddy Profecs... not sure if I actually would use them though.

Quote:

Originally Posted by redondoaveb

You may want to talk with Seb about your fuel pump and injector size too

Actually was his idea... I have been running 1050dx's on a walbro 255 without a return set up. These up coming changes will put me on the boarderline... so safety measures really.

Thanks for the time!

redondoaveb · 06-09-2022, 07:19 PM

Quote:

Originally Posted by NissanTracker

Yes, this is my 07 Nismo... I don't think i'll touch a vortech on my 14 nismo. I've thrown too much money on this V3 setup to get it right. Too noisy and tacky. I'm in FI TT kit prices at this point ;-)

Hmmm... peeeerrrrrrrrty. I'll check it out. Charger is getting pulled out anyways

Yeah... the HR on 93 pump gas will only go for 12 psi safely. I just want to shift the power curve to the left. I don't see why a manual boost controller just set to 12psi shouldn't do it. But, there are some cool features on those Greddy Profecs... not sure if I actually would use them though.

Actually was his idea... I have been running 1050dx's on a walbro 255 without a return set up. These up coming changes will put me on the boarderline... so safety measures really.

Thanks for the time!

I highly recommend the FI tt's

I agree, a manual boost controller should be fine for your situation.

Seb's the man. I definitely do what he recommends

NissanTracker · 06-13-2022, 07:48 PM

Quote:

Originally Posted by redondoaveb

I agree, a manual boost controller should be fine for your situation.

What size external wastegate did you end up with? I'm seeing anything from 38mm, 44, 46, 50, 60. Finding aluminum flanges seems to be a challenge as well. I'm trying to find something that is the same size as the 50mm Tial flange.

redondoaveb · 06-13-2022, 09:35 PM

Quote:

Originally Posted by NissanTracker

What size external wastegate did you end up with? I'm seeing anything from 38mm, 44, 46, 50, 60. Finding aluminum flanges seems to be a challenge as well. I'm trying to find something that is the same size as the 50mm Tial flange.

It was a 44mm. We tried a 60mm at first but it didn't work right. I guess there's an issue with dumping boost too quickly.

NissanTracker · 06-14-2022, 08:08 AM

Quote:

Originally Posted by redondoaveb

It was a 44mm. We tried a 60mm at first but it didn't work right. I guess there's an issue with dumping boost too quickly.

Haha... I ordered a 44 and a 60. will Cancel the 60mm.

DrBacon · 06-09-2022, 11:07 PM

Quote:

Originally Posted by NissanTracker

Yeah... the HR on 93 pump gas will only go for 12 psi safely. I just want to shift the power curve to the left. I don't see why a manual boost controller just set to 12psi shouldn't do it. But, there are some cool features on those Greddy Profecs... not sure if I actually would use them though.

That's effectively what the Rotrex kit does, just spins the blower at full potential using a wastegate to limit the additional boost resulting in moving the entire boost curve left. The exact same thing can obviously be accomplished with a vortech kit as well. The SI would get you part of the way there but a TI trim blower would be more comparable to the Rotrex in terms of CFM.

redondoaveb · 06-09-2022, 11:50 PM

Quote:

Originally Posted by DrBacon

That's effectively what the Rotrex kit does, just spins the blower at full potential using a wastegate to limit the additional boost resulting in moving the entire boost curve left. The exact same thing can obviously be accomplished with a vortech kit as well. The SI would get you part of the way there but a TI trim blower would be more comparable to the Rotrex in terms of CFM.

I don't know how well the Ti trim works on an hr but it didn't work worth a sh!t on my vhr. It gained a ton of boost but lost power and torque. Had to go back to the Si volute and impeller to get the power back

NissanTracker · 06-10-2022, 10:10 AM

Quote:

Originally Posted by DrBacon

That's effectively what the Rotrex kit does, just spins the blower at full potential using a wastegate to limit the additional boost resulting in moving the entire boost curve left. The exact same thing can obviously be accomplished with a vortech kit as well. The SI would get you part of the way there but a TI trim blower would be more comparable to the Rotrex in terms of CFM.

Yeah...i saw that as well.

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