no, just recommending a supplier

I believe you've first hand experience of his turbo's too?

David

 

Sampled in the interests of science

 

 

If I can take this back to #25 by JB:

The 20g on a 2.5 is a huge improvement on bhp at early rev points.

Between the 20g/2L and the 20g/2.5 what other mods were introduced please; are the fuels the same etc or are the curves real 'apple for apple' comparisons where the only difference is the capacity?

Can you plot the same John for torque?

Finally what was boost at , say, 3K 4K 5K etc rpm.

Graham.

 

I changed from ported OEM headers with aftermarket uppipe to Gruppe-S headers/uppipe, otherwise both apples

Boost on the 2.5 was 1 bar at about 2400 RPM, 1.4 bar soon after, rolling gently to 1.27 bar at the top.

Boost on the 2.0 was 1 bar at about 3000 RPM, then I can't remember in detail, but I think it was about 1.7 bar dropping to about 1.5 bar at the top.

More capacity (if you have the strength and breathing and ability to rev) with the same turbo is a double gain in some ways - you have more naturally aspirated torque to spool up your turbo, think of it as earlier as well as higher. I didn't find it had the strength in terms of holding the gaskets to support a higher output though than a boggo 2.0, but I could have been unlucky. I won't start going on about how I want to fiddle with an iron block on a turbo motor otherwise I will go all dewy eyed and keep going on about 4G63s...

Torque plots (at the wheels):

 

Im getting fed up of Dr 'I've got a copy of Excel' Banks

 

too ******* right , can he no just get p1ssed and post crap like the rest of us , even just once in a while?

 

He asked for it you b@$t***$ and you 2 r as wel!

%$£"%^*&&(%&??

 

I'd noticed that Captain Spreadsheet had made a major comeback on 22B recently as well

Or ashould that really now be Herr Kapitän Spreadsheet