Non VNT turbo selection?

[the4ork]

carrying this thread over from tdiclub, where it has 90 views, 0 replies and almost on page 2...

Interested in possibly trading out my k03 for something else....

know someone with a k14 i can get for cheap...

so other cheap options would be k14, k24, 1.6 t3, or a standard t3 45-50 trim on an ebay manifold



ive done some searching on the legacy turbos (ones from 1.6/aaz) and it appears from my searches that k24/t3 are too laggy (for legacy engines) and k14 flows better than k03 but not as well as k24/t3 and seems like a good mid-size of the bunch.

but my question is, with a proper tune, and larger displacement, my AHU should cut a signifigant amount of lag, perhaps all from the k24/t3 which makes them a more likely choice.

and a good used garret 45-50trim on an ebay manifold with internal wastegate sounds like another very appealing option as well, as the maps look like thy can run well into the low-mid 20's for boost, with perhaps some small lag?

thoughts?

[RabbitJockey]

ill bite.  most people don't know that much about turbos other than big spools slow flows more and small flows less but spools faster.  which its actually alot more complicated than that but that is basically true.

i don't know that much between the k14 and ko3, but i would guess that they are very similar in performance, and its probably not worth the work of swapping out unless its free and your ko3 is no good.

on a modified engine, and im talking just increasing boost and fueling, the 1.6 k24 and t3 turbos really aren't that slow spooling, and a tdi with a modded pump and closed wastegate and built pump has no second thoughts on destroying one haha


ask hillfolk, as he has run basically all these turbos on his tdi-m.  his last turbo was a 45 trim .48 a/r(what most people consider a standard t3) from a mercedes and he said he was able to get full spool of around 30 psi at around 3000 rpms.

it really depends what you want out of the car as to what turbo you choose.  obviously the t3s are the biggest and will give u the best peak power.  you can also try a hybrid t3 as me, theman53, and crazy andy are all going to try,  we all have 45 or 50 trim t3 compressors bolted to a vw exhaust side turbo.  the best part is they bolt on almost the same as the stock turbo did and should spool up similarly to the stock 1.6td but supply alot more air flow up top.

[8v-of-fury]

So it is only the compressor side of the VW T3 that is restrictive??

I am thinking (because I have the VW T3 here in my hands) that I will put that T3 on and use it with the m-tdi. I have no plans of 30psi, and definitely not utilizing a stuck waste gate haha. The motor hauls non-intercooled and under 17-18psi.

[the4ork]

are you talking about using a more standard 45 or 50 trim but bolting it up to the VW 1.6T3 .36A/R turbine housing?

if so you dont need to go hybrid if you have coin, turbonetics offers a .36a/r turbine housing for all their standard t3 trims, i've often looked into doing one after picking the 45 or 50 trim as my compressor map of choice.

what i'd really love to know is how a .48 housing spools on a tdi, my thoughts, somewhat laggy

[RabbitJockey]

So it is only the compressor side of the VW T3 that is restrictive??

I am thinking (because I have the VW T3 here in my hands) that I will put that T3 on and use it with the m-tdi. I have no plans of 30psi, and definitely not utilizing a stuck waste gate haha. The motor hauls non-intercooled and under 17-18psi.

yeah the vw t3 has a really ***ty inefficient compressor that doesn't flow very much.  the turbine wheel is ancient and heavy in a t3.  but the idea with the hybrids is that they are cheap to make and bolt straight on like stock. .36 ar is supposedly able to flow 220hp.  the best hybrid from old parts would probably be a 50 trim t3 with a large t25 hot side, but then it wouldn't bolt on straight like stock.

to the4ork, yes thats what im talking about.  i know they offer .36 but then it will have a standard t3 flange so you'd also be buying another manifold, plus i would imagine the turbo would cost alot more than finding a used 45 or 50 trim and taking it to the rebuilders with a vw t3 u already have and getting them to build it for u.  and at the cost of the turbonetics turbo and it not having a vw flange u could probably just buy a way better newer turbo anyway like a gt2056.

like i said too hillfolk has run a mercedes t3 which is 45 trim and .48 on his mtdi, and as i remember he was able to get 30 psi by 3000rpms, but he had a ported head and a very built pump.  but also a mercedes has a much older heavier turbine wheel than other t3 turbos so one off a volvo or saab would spool up faster, the other thing with spool up, it is so subjective to timing and fueling on a diesel.  adding more fuel will make them spool alot faster and playing with the timing can change spool times too.

[the4ork]

what about just adding a T3 with my k03

dont know much about compounding except for the plumbing... tuning... not so much

i'tll never happen, but it would be interesting to see it done. seen a few threads on here about compounding... dont recall ever seeing anyone actually go through with it and have success except for one r32 tdi swap thats on compound turbos i saw at tdi club

[RabbitJockey]

what about just adding a T3 with my k03

dont know much about compounding except for the plumbing... tuning... not so much

i'tll never happen, but it would be interesting to see it done. seen a few threads on here about compounding... dont recall ever seeing anyone actually go through with it and have success except for one r32 tdi swap thats on compound turbos i saw at tdi club

theres been a few good compound builds, andy2 has a 400+whp compound tdi.  and i think it was 410???  who build a toyota truck with compounds that i think was a k03 with a 1.6 k24.  i think it would work pretty well more than likely.   i think compounds take experimenting to find what truly works well.

[410]

If you can handle the plumbing, adding a t3 to your k03 would allow up to 30 psi boost quite easily.  I did a toyota pickup with the k03 and k24.  It had excellent road manners but when you want the power it's there.  We had malone do the tune for it and controlled the k24 with the computer and had the k03 controlled mechanically.  Max psi was 26 for this setup but 30 psi would be no problem as far as the turbos go. 

[the4ork]

Are the iat's through the roof?

[410]

Are the iat's through the roof?

Intake air temps rarely go over 30'c.   Most factory compound setups cool the charge air between turbos as well but at 26 psi it wasn,t nessacary.