mr steve

CFM X 0.069 =LBS/MIN

willeywilson

Thanks Mr Steve, although this is for a TD04H-19T, with mine being a TD04L-19T would that change that map (even though it is specifically called a compressor map).

Thanks

mr steve

I had originally thought that you may be able to get there by adding a cutout early in the exhaust. This map makes me think it wont get there. Should be very little diff between td04h vs L, AFAIK

18psi

iTrader: (76)

the restriction is in the turbine, so adding an exhaust cutout doesn't help it flow more.

mr steve

is there an echo in here or something?

18psi

iTrader: (76)

Yep. you

andyfloyd

You can get either a VF39/43/48. They will all get you around 300whp but probably not much more than that. The TD04L turbine is tiny and even though you have a 19T wheel the turbine is not sized correctly to be able to take advantage of the compressor wheel. The WRX guys that upgraded to a 19T never really made much more power.

Pepovr

Savington

iTrader: (31)

Not a requirement. An upgraded damper would be a good idea, though.

Pepovr

mx5-kiwi

I too would like an upgraded damper on our engine, suggestions where to source (currently seeing as my go to sources, you and 949, are not carrying them at the moment)?

Pepovr

willeywilson

Bringing this up again as i have been rearead quite a bit around VF43/48 as suggested and just have a nagging feeling that I may may be pushing it to the edge of its capabilities giving me ~300whp, and I'd rather something reliable than constantly stressed (like my poor TD04L-19T is right now).

So, asking the same question above, could i Transplant my 19T wheel into a TD05H-16G with new cover plate? Would this get me where I want to be or would it be laggy as hell?

Also, i im now running a lovely Kraken cast manifold, downpipe and 3" exhaust, as i was sick of reparing my DIY effort.

Cheers

Wilson

18psi

iTrader: (76)

there's thousands of Subaru's making 300whp for decades on the vf.

do you just like overthinking things? if yes, then by all means do some weird off the wall hybrid turbo setup and enjoy the small potential that it might not totally suck vs pushing the easy and cheap button.

turbo's are not "stressed" when they're within their appropriate comp/turbine maps.

willeywilson

Sorry, yeah i do overthink everything. What i mean is, if i fit a VF48 and run it at 20psi to achieve 300. How long is is it going to last before it ***** itself. Given I've gone through two TD04 cores at 18psi it makes me nervous it wont be very reliable .

piripi

18psi

iTrader: (76)

tons of guys running td04s at 18 peak for 100,000+ too

you probably started with unhealthy ones or some other issue.

ive seen 200,000mi on a td04 before

andyfloyd

I run my TD04 @ 18psi on my WRX, has well over 200k on it.

willeywilson

Well my first one killed itself due to a lack of oil (AN-3 pipe) and my latest core has developed more radial play than i would like, to the point where ive slightly enlarged the housing. And thats with AN-4 pipe and at least 600ml/min oil flow.

Looks like a rebuild kit is required before the nurburging trip next week. Although i was using the repair as an excuse to upgrade.

18psi

iTrader: (76)

it's like 50 bux for a decent rebuild kit. can't really beat that price.
in fact if you want a spare td04 (started smoking, so needs rebuild) and a rebuild kit I can probably send you both for $50+ship lol