Is the good ole Presision 6776 DBB P-Trim Water Cooled turbo old school now? It seems to have just up and disappeared.
It has been superceeded in size by the 6766: http://www.precisionturbo.net/Stree...Street-and-Race-Turbocharger---PT6766-CEA/480 However most people don't need that much turbo for a street car. What are you looking to do?
More track less street. Not sure how much difference I would see changing to the new 6766. May not be worth the money. Mines a 4" inlet and 3" outlet. Big exhaust housing.
I run an older 6776 ball bearing w/ H cover. Would love to upgrade to a billet turbo with ceramic bearings but it's hard to swallow when the old turbo works well and the new one costs well over $2K.
Unless you plan on trapping 135+ there will be about nothing there. The 67 Cea will overrun the turbine too. It's almost a mismatch of wheels to run the 65 ex with the 67 compressor. There is nothing out there showing a power gain with the 66 because no one has a b a tested and run one hard enough. There is a little squeeze room there you won't see it unless you are running it really hard at that point most would run the bigger turbine and drop the backpressure a bunch.
I have run up to 26psi. After the converter change I'm going to shoot for 28-30psi. Crank is going to hold me back. Stocker!!!
