Power differance between mid frame and large frame turbos???
06-05-2006, 08:07 AM
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Power differance between mid frame and large frame turbos??? Like the title says I was wondering if there is a differance in power or power curve depending on the turbo frame size as long as its say a 76MM midframe compared to a 76MM large frame. If not whats the advantages of the larger frame turbos??? Any responses would be great thanks guys.
06-06-2006, 05:56 PM
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Here's what it brakes down to in my understanding.
Small frame = T4 compressor, T4 exhaust (IE, PT76-GTS)
Mid frame = T4 compressor, T6 exhaust (IE, mid frame T76 with a F-trim turbine, PT88 T6 housing)
Large frame = T6 compressor, T6 exhaust (IE, PT91.5, GT47-88, PT101, etc)
So the only "large frame" 76mm turbo would be like a few cheater turbos PTE/ITS offer with a 94-ish mm wheel necked down with a 76mm inlet reducer. Obviously the result is more power with more lag, just like going bigger on any turbo.
Small frame = T4 compressor, T4 exhaust (IE, PT76-GTS)
Mid frame = T4 compressor, T6 exhaust (IE, mid frame T76 with a F-trim turbine, PT88 T6 housing)
Large frame = T6 compressor, T6 exhaust (IE, PT91.5, GT47-88, PT101, etc)
So the only "large frame" 76mm turbo would be like a few cheater turbos PTE/ITS offer with a 94-ish mm wheel necked down with a 76mm inlet reducer. Obviously the result is more power with more lag, just like going bigger on any turbo.
06-09-2006, 12:35 AM
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Originally Posted by eviltwins
Here's what it brakes down to in my understanding.
Small frame = T4 compressor, T4 exhaust (IE, PT76-GTS)
Mid frame = T4 compressor, T6 exhaust (IE, mid frame T76 with a F-trim turbine, PT88 T6 housing)
Large frame = T6 compressor, T6 exhaust (IE, PT91.5, GT47-88, PT101, etc)
So the only "large frame" 76mm turbo would be like a few cheater turbos PTE/ITS offer with a 94-ish mm wheel necked down with a 76mm inlet reducer. Obviously the result is more power with more lag, just like going bigger on any turbo.
Small frame = T4 compressor, T4 exhaust (IE, PT76-GTS)
Mid frame = T4 compressor, T6 exhaust (IE, mid frame T76 with a F-trim turbine, PT88 T6 housing)
Large frame = T6 compressor, T6 exhaust (IE, PT91.5, GT47-88, PT101, etc)
So the only "large frame" 76mm turbo would be like a few cheater turbos PTE/ITS offer with a 94-ish mm wheel necked down with a 76mm inlet reducer. Obviously the result is more power with more lag, just like going bigger on any turbo.
