Who to tune with?
Daz im still in the process of gettin parts together but at the moment im using a ebay T70 on a stock 4.8l. Tripplblack has a couple more things done to his.
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Honestly I would consider myself a novice tuner at best, I have spent a ton of time researching, learning and experimenting, added to this I have a professional tuner as a friend that's gave me a ton of adivise
With that being said I feel my tune that is a work in progress is pretty good considering, that my 4.8 w/ms3 cam holds a steady 700rpm idle and very minmal surging .
Anyways I know every set up is different but there should be minmal backpresure until boost is being made and at that point it should be in open loop, I would imagine that you have had to deal with a quite a bit of cars with improperly sized turbo causing exsessive backpressure issues .
I wonder if a o2 sensor from a lnf or other factory turbo equipped o2 would would work better in this situations , I'm sure there probably designed to work with backpressure ?
Back on topic sorry for the

Last edited by Ryne @ CMS; Nov 23, 2011 at 05:31 PM.
Daz im still in the process of gettin parts together but at the moment im using a ebay T70 on a stock 4.8l. Tripplblack has a couple more things done to his.
still have to pull the motor and trans outta the 91z and put it back in. stoopid oil leak






