Unknown bolt-on turbo.

[suprafredde]

Bought this blue thing and Im hoping someone has seen its kind before and can estimate its hp limit.
I would rather not take it apart but if I have to so be it.

regards Fredrik

 

[MDCmotorsports]

That appears to be an older to4b, with a 57 trim compressor wheel and an O trim turbine, mated to a CT26 exhaust housing.

The bearing housing is a t4.

The compressor housing was originally used in a Ford diesel application and other off hwy apps.

 

[suprafredde]

Thank you!

Do you think its any good?
Semi slow spool and maybe some boost creep due to the ct26 wastegate hole?

suprafredde

 

[MDCmotorsports]

Its a good turbo, provided it doesn't have any shaft play. Should be able to make the 400's mark with it. I doubt it would be that slow to spool in the ct26 exhaust housing...

As for the wastegate hole, I would port it out the best you can.

 

[suprafredde]

Has little up/down but nothing shaft length wise. How much should I leave for the flapper to rest on? 1mm?

Thanx for the good news/help Mr MDCmotorsports.

 

[MDCmotorsports]

Try for 1.5-3mm around the entire flapper of the wastegate. Make sure to sand the edges inside the housing smooth, so the gasses do not create turbulence around the wastegate.

 

[suprafredde]

Picture below shows my current build state.
Turbo got painted and flapper hole ported out as much as I could, edges rounded and housing clocked so there is a little bit of pre tension on the flapper.

The oil inlet fitting is a hair larger than 7mm id.
Ditching the banjo feed and Im wondering what size hose to use, and if I should put some sort of inlet restriction on the feed?
Where to buy hose and fitting for the 7M block?

Never mind the dirty inlet hose and unfinished valve covers =)

Thanx
suprafredde