The 26 head was ported, oversize valves, 280 10.8mm cams, stock inlet, 6Boost manifold, Garrett T51r
The 25 head was ported, tomei 256in and 264ex cams, Greddy plenum, 80mm throttlebody, 6Boost manifold, Garrett T51r
Have you got a dyno sheet for the 7175 on your 2.8..?
What rpm are you seeing boost and what size rear housing do you run..?
I have a Garrett T51 and was thinking about changing to a Precision 6765 or 7175
Its now in Shanes shed for him to finish it off. Wire up a few extra gauges, oil temp, oil pressure and trans temp.
And needs to setup the shifter so all the gears work.
I had brand new tyres and they turned to shit after a few power runs and started smoking on the rollers. Even with 2 guys in the boot and 2 in the back seat. Less tread next time for me
My highest reading was 475
Go talk to Brad. He does all my tuning.
I had my engine build by ProEngines. Here are some basic bottom end prices.
http://www.proengines.com.au/packages.html
With my old 300rwkw setup and 3" exhaust I gained 6rwkw by removing the high flow cat.
When I ran the twin turbo setup on the RB25 I had a side pipe but didnt do any tests with the full system
The current system 4" dump, no cat, 3.5" system with a cannon at the rear was fine at 475rwkw.
Will be making a new 4" system shortly but not sure about a cat.