if a t4 kit comes with the thrust bearing and thrust plate does it matter if the backplate is a dynamic or carbon setup?

 

Yes,
the resident experts on this forum recomend the carbon seal, not the dynamic seal.

Also, a quick search will usually give you the answer you are looking for:
https://www.rx7club.com/showthread.p...t=carbon+turbo

-a

 

not quite what im asking. what would allow to convert from carbon to dynamic and is there an obvious visual difference. would the whole bearing housing need to be different to fit a dynamic back plate?

 

Yes, it's obvious.
The CH and backing plate need to be machined to fit the larger dynamic seal.
BNR does offer this modification.


-Ted

 

so, can i tell the difference by looking at a picture of the back side of the backplate.

 

That is correct.


-Ted

 

okay.... so what is the visual difference then? do you know if this would work?
http://cgi.ebay.com/ebaymotors/ws/eB...category=33742

 

or this dynamic or carbon?

 

Going by the compressor measurements, it's an H-trim compressor wheel.
http://fc3spro.com/TECH/TURBO/tmodels.html

It's a dynamic seal.
See the bronze colored "C" part in the middle?
Right under it is the dynamic seal.

The compressor map at the bottom of the auction shows a V-trim compressor map.
Weird...


-Ted

 

ReTed - can you tell us what are the benefits of the carbon seal and what are the detriments of the dynamic seal. You advocate for the carbon seal, but you never mention that it requires a whole new backplate. Please elaborate.
Thanks,
-a

 

Actually, the stock Hitachi (HT-18) uses the carbon seal.
Carbon seal actually seals better, but it was designed for draw-through (carb) systems where the turbo actually sees fuel.
You *cannot* run a dynamic seal with a draw-through system, as the fuel will bypass the dynamic seal and wreak havoc with the bearings (and oil system).
The dynamic seal actually can handle more boost and more robust in high boost (i.e. over 15psi) applications...IME...

Personally, I would rather have a dynamic seal there, but retrofitting a dynamic seal to the stock Hitachi turbo is a royal pain in the *** and expensive...


-Ted