[Supras] 57 trim CT26 alteration

[Rich]

I agree with Geoff.  The power loosing restriction on the CT-26 is 
/through /the turbine area, which can be improved by clipping the 
exhaust wheel at the expense of more lag.  Making the wastegate larger 
doesn't increase flow through the turbine area...  If I were to bolt a 
larger external wastegate into my Infiniti, why would I expect any power 
increase?

Also by removing material from an area of the casting already known to 
crack (wastegate flange) probably from heat stress, aren't you further 
provoking a problem in that area?
-Rich

Jeff Mohler wrote:
> I have a few friends with VW diesel TDi's with VV turbos..nice.
>
>
> But..the WG doesnt flow exhaust to make HP..it only needs to flow MORE
> if you have too much boost, IE..creep.
>
> I dont see where a lick of power comes from a larger WG transit.
>
> On Dec 10, 2007 8:59 PM, berniek at technicaldevelop.com
> <berniek at technicaldevelop.com> wrote:
>   
>> After disussing it with (I forget who) at Performance Techniques, he
>> agreed that the boost would come on faster without clipping the turbine
>> wheel.  But then, what to do with volume of exhaust gas after spoolup?
>> Bypass more at the wastegate, which is what we did.  The ideal solution
>> would be variable geometry inlet guide vanes.  Although they made a
>> brief appearance on cars some time ago, they seem to have become
>> relegated to truck use, no doubt due to cost considerations.
>>
>>
>>     Bernie