Will be interesting to see the curve with VCT working as it looks fairly lazy (for the turbo size) but fook me that top end is very impressive considering the boost
I may be a little out, but if you run a GPS speedo and digital tacho you will have the most accurate way to find out Saying that I usually calculate on slightly different diameter tyres and they do change things a little!
"Better" would be better bottom end with similar mid range and top end (and hold power longer). I'm sorry but if you think that your result can go 10 rounds with a GT-RS or AX53B70 I think you are a little misguided.
I think your rpm scale is probably about 200rpm short of where it should be 116km/hr should be about 4140rpm.
Also in regards to the start of the graph being at 5psi that is because the car has been loaded up against the dyno before the run has started.
Still not a bad little turbo for the price, there is a lot better out there but it will cost you a pretty penny premium.
Notice I said what happens before and after... You talked about after (which I agree is similar), not before... Which it isn't!!!
The only reason you would buy a GT-RS is for response between 2500-4000rpm which is also the spot where it murders the hypergear.
If a GT-RS could hold more boost it would make more power
Every decent turbo makes 180-200rwkw at 4000rpm on a RB25... It can be a T67, 3071, 3076 or HKS 2835pros, they all do it
It's what happens before and after then that makes the turbos different!
Looking at the graph, it would have nothing to do with the manifold/turbo or gate...
Something else is funky... I would be taking to someone else is that was the result
ah me clutch fail!
Did you get a graph anyway?
On the news on poncams for my car, someone has a spare set lying around who I'm going to do some deals with so will have new results soonish