aspec gt3574
 

Anyone that knows the compressor lbs/min flow on these?
Or have a complete compressor map over it?
I would like to know the max boost they are capable off .

same compressor as a regular gt35, the maps are available from garrett. the difference is in the turbine side, the 3574 has a 74mm turbine (p-trim common in to4 series turbos) vs a 68mm in the regular gt3582r.

What rpms would this spool at.. I really want to upgrade to a single and can afford this right now or save up for a 35r

Its a solid turbo. Spools close to as fast as a ball bearing 35r at a much more affordable price. We have installled a few of these at the shop with excellent results.

There is also the ball bearing version called 3574R. Contact Sean from A-Spec for flow and spool numbers.