Can anyone here tell me on stock block on 91 fuel and e85 at what rpm these turbos hit full boost (20psi) at? Also if adding gsc s2 cams and springs retainers, what difference does it make

 

For the 5558 in 3rd gear on E70, 10:1 CR, CNC ported head, +1 valves and S2 cams:

Approx 4200 rpm for 20psi, 4700 for 29psi.

5858 Gen 1, add about 150rpm on both.

 

What would the 6266 be like?

 

6266 would be past 5k rpms. On the stock motor, it will be boring. Do the 5558.

 

Which turbo would you recommend on a fully built 2.0 for track use and canyon runs

 

Either, 5858 seems to have a little bit more top end. I used the 5858 a lot on track and it can make enough power, even at only 25psi, with a built engine to hang with the big dogs. Vipers, GT3s, ZL1s, etc.

 

ty sir anything similar to the 5858 on Garett turbo by any chance? Your feedback is well appreciated

 

GTX3076R would be comparable to a 5858

GTX3576R would be comparable to a 6262

 

ty very much sir you’ve been very helpful I’m currently running the 3071R gen 2 at the moment now I don’t know if a 5858 is gonna be a big difference as far as power is concern. I will definitely look into all the turbos you’ve recommended.

 

hi
turkish citizenship
On a fully constructed 2.0, which turbo would you recommend for track use and canyon runs?