advise on turbo size
09-07-2012, 03:17 PM
#1
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advise on turbo size Hello all this can get confusing as you know.
I have found a turbo this this information
"Garrett T4 - T4OS turbo. New from Garrett and upgraded with bigger wheels and a new shaft it is a 70 trim 67 mm turbo. It has a 60 A/R compressor and 1.15 A/R hot side, wheel is 2.27 allowing a lot of exhaust flow."
That said I cant find anything about it. And I dont understand the numbers Im still learning
My application is a 5.3 in my 1968 pickup with a T56. Front mount application. I currently have a TR220 cam 112 cam.
Anyway any help on what this turbo is?
Thanks
Dave
I have found a turbo this this information
"Garrett T4 - T4OS turbo. New from Garrett and upgraded with bigger wheels and a new shaft it is a 70 trim 67 mm turbo. It has a 60 A/R compressor and 1.15 A/R hot side, wheel is 2.27 allowing a lot of exhaust flow."
That said I cant find anything about it. And I dont understand the numbers Im still learning
My application is a 5.3 in my 1968 pickup with a T56. Front mount application. I currently have a TR220 cam 112 cam.
Anyway any help on what this turbo is?
Thanks
Dave
Last edited by custom 68; 09-07-2012 at 03:46 PM.
09-07-2012, 03:48 PM
#2
do you have that turbo now and you are asking if it will work ok?
or are you contemplating buying the one you are describing and asking if its good for a mild cammed 5.3 with a Schtick?
or are you contemplating buying the one you are describing and asking if its good for a mild cammed 5.3 with a Schtick?
09-07-2012, 04:03 PM
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2.27 * 25.4= 57 mm
Turbine is too small, the 67 mm as long as it's the inlet for the turbo would be fine for a street, LS6 style cam only, stock 5.3.
A T04S is not a 67 mm compressor, but they do build turbos with a bigger compressor and the T04S cover and back plate.
For a 5.3 on the street, you 'd want a TC70-76 size imop. They have a 68mm turbine. Although a 6768 would work too if that's all the power you want. - for now-
If you plan on ported heads and bigger cam, you'll want a 7675. 76 = compressor in, 75 is turbine out. aka 76GTS or 76HPSH. S means 75 mm turbine outlet diameter. H means 4" inlet, 3" outlet compressor cover, HP is the compressor wheel model IIRC.
Turbine is too small, the 67 mm as long as it's the inlet for the turbo would be fine for a street, LS6 style cam only, stock 5.3.
A T04S is not a 67 mm compressor, but they do build turbos with a bigger compressor and the T04S cover and back plate.
For a 5.3 on the street, you 'd want a TC70-76 size imop. They have a 68mm turbine. Although a 6768 would work too if that's all the power you want. - for now-
If you plan on ported heads and bigger cam, you'll want a 7675. 76 = compressor in, 75 is turbine out. aka 76GTS or 76HPSH. S means 75 mm turbine outlet diameter. H means 4" inlet, 3" outlet compressor cover, HP is the compressor wheel model IIRC.
Last edited by TurboS10; 09-07-2012 at 04:14 PM.
