Upgrading from Tomei 260's to 270's Solids

[juggernaut1]

Originally Posted by Master Chief

I dissagree on the TIAL housing having a "t25" like sized inlet, beeing a restriction.
The inlet of the turbo housing, has no affect on flow - only the turbine A/R does.
If the inlet of the turbine is large enough to accomodate the turbine A/R - there is no restriction.

All turbo housing are constructed to have an equal or larger inlet then the maximum cross section area of the turbo housing. An area wich actualy dictaes the turbo A/R.

I hear what your saying - but I don't see Garrett or any other turbo manufacturer using t25 inlet size on this size turbo. They are usually T3 and now I see T4 housings are available through ATP for the GT35.

Not a disagreement but just an observation.

Also have you considered staggering your cams i.e. 260 inlet and 270 exhaust is popular.