Anyone with a 3.48 pulley on a Vortech v3 Si?

[Nanie_5.0]

Can’t seem to find anyone running that setup, just curious if it’s even possible or safe

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[barkingspud]

Sure you can. As long as you don't go over the 52k impeller speed limit for a sustained period. You will need a retune. Assuming you're using the stock lower balancer pulley (6.78") even shifting at 7500 rpm's you're at 52k and change but only for a brief time.

https://vortechsuperchargers.com/pages/impeller-speed-calculator

 

[Nanie_5.0]

Ok thank you that’s exactly what I was looking for. I don’t rev the car much past 7300 anyways

 

[ChristianDev]

Thinking of going down to the 3.48 as well. Will the stock belt work?

 

[JDUBU]

I run a 3.33" pulley on mine. No issues so far. I have a 3.48" grip tech new in the box if anyone is interested.

 

[Nanie_5.0]

Thinking of going down to the 3.48 as well. Will the stock belt work?

I ended up using a smaller belt so I’m not sure

 

[NicksRubyRed15GT]

I run a 3.33" pulley on mine. No issues so far. I have a 3.48" grip tech new in the box if anyone is interested.

you ran it at the track on that 3.33? I am putting my fuel system and Griptec 3.33(e85) on this week and was curious what to expect vs the 3.6 and 93. I already went a 9.93@140 on the 3.6 and catless headers on 93

 

[JDUBU]

I did run at the track with the 3.33 and e85. Went 10.2 at 144 with a 1.59 60. Had an issue with the car cutting power imediatly after launch. Bent an axle too.

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