Supercharger Upgrade SCI -> SI

NissanTracker

Have you ever heard/dealt with Impellar upgrades from Superchargerrebuilds.com?

This one caught my eye:

Mid range 16 tall Billet impeller Vortech – 7075
"Designed for better low to mid range response, with some expected loss of top end"

redondoaveb

I've heard of them but I don't know anything about their impeller upgrade. I can tell you that I sent my Si sc into 928 Motorsports (one of the most popular upgrade companies) and had their Super Vortech upgrade done which included a billet impeller that made the same claims. Since I had already had a previous dyno log with the Si impeller, 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

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

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.

redondoaveb

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

Attached Images

Screenshot_20220609-134746_Instagram.jpg (636.0 KB, 12 views)

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

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!

redondoaveb

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

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

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.

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.

redondoaveb

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

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

NissanTracker

Yeah...i saw that as well.