Jump to content
SAU Community

Recommended Posts

Hi all , am interested to know if anyone has a HKS TO4Z or comp cover lying around . The little doers at High Kost Spec have found ways to improve on the diffuser section of their compressor cover and I want to see what it looks like . So any pictures of the inside or wheel side of one of these covers would be real handy .

Cheers Adrian .

Link to comment
https://www.sau.com.au/forums/topic/112328-hks-to4z-compressor-cover/
Share on other sites

What I mean is the front cover (compressor cover) removed so we can see from the inside . The diffuser is the flat section that forms a funnel shape that the compressor wheel vanes are profiled to fit inside . Mitsy is also crowing about widening the diffuser section of the Evo 9's std turbocharger to help pull up the bottom end of the power curve .

Cheers Adrian .

ive seen the back of them on juds one.

basicly the same design as the ta45 ta51 gt42 garrett compressor with the small holes feeding the lower group of blades.

just with a pretty cover bolted on instead of the usual 3 or 4 ports on the comp cover. but yeah no pics. im sure if you pm judd hel give you more info.

hope that helps.

Thanks Guys , its really the diffuser section I need to see rather than their glitsy port shroud hunk of Swiss Cheese . The diffuser is the bit where the funnel section transitions into the flat section which is parallel with the backplate just beyond the compressors exducer blades .

The ask is because I'm cooking up a BB hybrid that I don't think has been used in Aus before and its not GT35R or T4 turbine based .

Cheers A .

Edited by discopotato03

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • @soviet_merlin Thanks mate!  Nothing too major but will hold me up for a while. I've got lymphomas to get taken off the back of my neck and the middle of my spine which always conjures scary thoughts!  It sounds worse than it is. Yeah great, conjuring more rabbit hole deepening , just what I need! 🤣  
    • I'd argue the F50 kit I got is very good value. For ~2k I got the calipers (refurbed condition), adapters, pads, brake lines, rotors, and top hats. I think you'd be pretty hard to get Evo/GTR/350z brembos + the additional hardware for similar money. Used market for a pair of front calipers alone I've seen tend to run anywhere from $1500-2000 depending on condition.    That said, something like a GTR or 350z brembo is a lot easier to adapt to the Silvia. 
    • Is there a significant price difference between the Evo/gtr/350z brembos vs the F50? Looks amazing.
    • I was actually being a tightarse at the time LOL... My OCD is tickling me into running a 2nd 8AN Teflon hose all the way down and removing the 2x OEM hardlines. My other side of my brain is telling me to run 2x hardlines front to back (also acts as a fuel cooler, so win win).
    • As I mentioned in an earlier post, I had some trouble with the Silvia's brakes dragging back in 2023. I managed to sort it out then, but the same problem came back to bite me late last year. Just take a look at the picture – I had a feeling the handbrake was acting up again, and I was right. Anyway, I'd been wanting to upgrade to bigger brakes for a while. Not that the Silvia's brakes were bad, but it was more of a "want" than a "need", you know? It was funny, though – at the time, I couldn't find any Evo Brembos, 350Z Brembos, or GTR Brembos for a decent price (of course, tons of them popped up online after I already bought my kit!). I ended up going with an F50 Brembo kit, which came with adapters, brake lines, 330mm rotors, and top hats. The F50 Brembo caliper was used in a few other cars too, like the FPV. I also decided this was the perfect opportunity to ditch the Silvia's ridiculous rear brakes and that awful handbrake (some of you were definitely right about that!). I picked up some R33 calipers and all the necessary bits – rear drums, backing plates, and new hardware to refurbish the calipers. Of course, it wouldn't be a project without a few hiccups. Turns out the brake master cylinder was playing up and basically (to put it simply) keeping the brakes engaged. I had it overhauled, and after some adjustments, everything was working again. The whole process took a while, as you can imagine. To top it off, the front right wheel bearings were shot and needed replacing too. This is a rare occasion where I'm posting an update while it's all still fresh! These pictures were taken just this afternoon.
×
×
  • Create New...