TC05/TD05 Exhaust Housings

[JDSTAZ45]

Here's a pic of the exhaust housings for the TC05/TD05.

The one on the left has the 080 markings with 8cm2 housing and the one on the right is the 060 with 6cm2 housing.
Take note of the difference in thickness. Both housings have the 49/50mm turbine wheel.


The TC06 has the same 080/8cm2 exhaust housing but the turbine wheel is larger at approx. 65mm

On the 2.6L motor I find there is considerable lag with the TC06 set up and 17C wheel (nearly equivalent to a big 16G). This includes a 3inch dump and exhaust.
I think I will try another combo with the TD05 8cm2 exhaust housing, the core of small 16G compressor wheel with a starion compressor wheel housing machined out.
That with max. boost at 12/13psi (before cut out) should give me back the quick response I had with the small turbo but no top end.
If that fails, then I will try the EVO turbos with 7cm2 exhaust housings....sticking with Mitsu turbos at this stage!

[kiwieurospec]

Wait you have 2.6, Dash and 8 Valve models? A seat of the pants comparision is needed sometime on which model is best.
I was surprised how similar JAS's 2.6 felt to drive over my Euro Spec 2.0L but wasn't about to thrash JAS's car to find out more.

Fitting the tco5 exhaust to my car is the only thing I have done to my car, wouldn't go a far as quick response compared with modern stuff but way quicker than the old lazy tc06 it transformed the car. With the extra torque of the 2.6 it should work great.

[redzone]

Your 2.6 has a boost cut?!

[JDSTAZ45]

With the extra torque of the 2.6 it should work great.

I thought that would be the case as well, but it hasn't worked that way. There's no real rush of the turbo, it's just gradual until a decent surge between 4000rpm to 5500rpm.
I really think it's the restrictive exhaust manifold and opening where turbo sits. I suppose the head could do with more flow as well....

And RZ, there is a boost cut-out at 14lb, right? Or is it fuel cut? I know Shannon's one cuts out at that boost level!