Vortech sc 3.6 or 3.8

[Showtimepat]

I have a Vortech v3 jt on a 2018 s550 an I’m stuck with 91 oct in my area, am I able to run the 3.6 with no additives or do I need to run the 3.8?

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[cbrtrx]

To be safe with 91 I'd just run the 3.8.

 

[horsepower addiction]

3.8 is pushing it on 91

 

[larr12]

1. Ask your Tuner
2. Ask @beefcake for his advise and any supporting mods you might need.

 

[beefcake]

i personally would run a 3.8 on 91... unless your adding octabe booster to each tank

 

[illadvised]

i personally would run a 3.8 on 91... unless your adding octabe booster to each tank

I am stuck on 91 also. My last mustang was a Kenne Bell, they said I could swap to a smaller pulley without a tune as long as I had octane booster in the tank. So I would swap back and forth between pulleys

Is that the case with these centri kits? Can I swap pulleys with just octane booster or would I need to retune also

 

[beefcake]

you would want the tuner to at least look at logs, if you add a can of octanium to each tank you will proably be fine 1 pulley down, but again, have tuner check fueling

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