I am in the market for a new turbo for my RB25 ERC33, I had reason to ring GCG and while talking to their Sales Manager, Mark Landell, he mentioned that they can provide me with the internal wastegate Garrett GT3071R with a custom T3 turbine set up [they come out with a T28 std]. He reckoned this set up is a easy install bolt on equivalent of the HKS 2835proS.
Now I’m not knocking GCG, they have an enviable reputation and I've only got good things to say about they myself, and Mark is very likely a good man and knows his stuff. But he was a bit reserved when it came to talking up this turbo’s performance and likely power output. He reckoned 250rwkw was a good starting point and that maybe a bit more. This sort of threw me because the HKS 2835proS has figures quoted more like 300rwkw. And I’m already making 240rwkw with the turbo I’ve got, so I really want to upgrade, not move sideways.
I just wanted to see what everyone thought? I know discopotato has written some stuff on the 3071 external wastegate and is keen on an internal version, but is what GCG offering just such an animal, or is it something else/less.
The turbo GCG are selling has a 0.50 compressor cover, a 56 compressor wheel trim, and an 84 exhaust wheel trim and is rated at 450hp, but because it is new on the market, they really had no installed real time power output figure.