Stage one -with 120 mm throttle body?

[Paulsmithsr]

has any one tried too run 120 mm throttle body with stage one pulleys ?

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[LethalPerformance]

has any one tried too run 120 mm throttle body with stage one pulleys ?

There's really no point in running a 120mm TB on a stage 1 let alone a stage 2 making under 1000rwhp. For one the stage 1 calibration is throttle and speed limited. So no matter how big you go on the throttle body or how small you go with a pulley the throttle calibration won't allow you pass a certain point.

If anything I would suggest doing a stage 1 to stage 2 upgrade which you'll see the most benefits from. Then once you turn it up from there with more boost and better fuel you could explore doing the 120mm tb.
https://www.lethalperformance.com/w...70rp9-AWQEonCSro95s6hzGqf0HakDMWY3BjRm95zmKEb

 

[Paulsmithsr]

Thanks for info -Question when going stage 2 -with 10 rib and 20% lower pulley and stock 2.85 upper how much boost does that make ?—will u need too run higher then pump gas ? Maybe e30 or race fuel?

 

[LethalPerformance]

Thanks for info -Question when going stage 2 -with 10 rib and 20% lower pulley and stock 2.85 upper how much boost does that make ?—will u need too run higher then pump gas ? Maybe e30 or race fuel?

The stock upper for the 6 rib setup is a 3.85" I believe. If you go with a 20% lower and a 3.75" upper on a 10 rib setup I believe you'll be in the 18psi range. Every 1/8" in pulley size changes boost by about 1psi.

You're going to need to run better fuel than 93 and a fuel pump booster like our Fuel+ for anything smaller than a 3.75" upper and the stock lower. E30 works great but again will require a Fuel+ to run safely.
https://www.lethalperformance.com/l...ump-voltage-booster-2011-2024-mustang-gt.html

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