GT6776S Turbo

[dice64]

How many people are using this turbo?This is suppose to be the big shaft turbo rated for at least 725-780 hp.Some people say this turbo is dead after 25psi.Seems kind of strange a big shaft turbo is dead after 25 psi.Is this the case with this turbo? I know the small shaft turbo which is the TE 67 might cannot make more power,but how about the gt6776s

 

[Mike Licht]

The GT 67 wheel is a lower pressure whell that makes very good power up to about 27 PSI or so but the gains are small after that. The 66MM wheel used in the 45A and oithers is a high pressure wheel that does not make as much power as the 67 below 25 and more above and will make power well into the 30's. So pick your poison low boost power or high boost power, just depends on what you are after. For a high / mid 10 street type car I would pick the 67 for a high boost race car I would not
Mike