Hey fellas I've seen a bunch of conflicting information on the forum about what turbos the T78 and T88 actually are. Is a T78 a Td07 and a T88 is a TD08? Is that way off? I am really curious about this. Also if you know the different centimeters for each and maybe even the differences between a supra T78 and an rx7 T78. I'd love the answers to all this. basically everything you know about the 2 turbos. haha thanks guys

 

t78 has a td07 compressor housing with td08 turbine housing, whereas a t88 has a td08 on both sides

 

i have been told that a t78 is a full td08. this from someone who has built one. :scratches head:

 

well they were either wrong or were building a t88. that's what the numbers stand for

 

LIke i said....tons of conflicting information. Anyone else?

 

 

Exactly right

Example: T88-34D
The first letter, "T" denotes it is a Turbo charger. The second number denotes the exhuast turbine base spec and the third letter denotes the compressor base spec (again, from an MHI TD-08).

In the second group of letters/numbers (34D) the first number denotes the exhaust turbine wheel base spec, in the above cases all T88's use a type 3 exhaust wheel.

The second number in the second group denotes the compressor wheel base spec, either a Type 4 or a Type 8

The letters that follow the second group of numbers denote the compressor housing spec. IE: Type D spec: Conventional trumpet, from 100mm reduced into 70mm. There is also a GK spec that uses recirculation ports.

So, T78-34D is a TD-07 exhaust base spec, with a TD-08 compressor base spec. Type 3 base sepc turbine wheel with type 4 base compressor in a D spec compressor housing.

jeff

 

Jeff...now thats what I'm talking about!

 

So is the compressor wheel on the 88 the same as the 78? I would take a guess and say its not.

 

nope, it's slightly larger, but it's still within the same housing

 

The T78 is usually a 33D and not a 34D. I just tossed that out there. The T88 can be had as a 33D, 34D or 34GK. A T88-33D has the same compressor as a T78-33D. The 33D is a 66mm inducer, the 34D is a 69.7mm inducer and the GK is a 69.7mm inducer but uses a 100mm inlet with a ported shroud.

jeff

 

whoops, i thought he said turbine on that other post. the compressor and comressor housings are different sizes on the t78 and t88

 

So can anyone tell me what size turbine housing would fit a TD07-8?
If it helps the part number is MEC73583 and the MFD. NO. is 49187-00280
I bought the turbo for $4 but it doens't have a turbine housing. There is still some life left and I would love to put it to use.

 

the td08 would be the actual exhaust housing for either turbo. you'll need to know what model though

 

The td08 will fit but I need to know what model? How do I find out what model? The turbo has the type, serial number, part number, and MFG number.