Midwest Turbo Connection is looking for a pilot TD05 car that wants Billet Wheels

**92RT-TT** · 09-30-2011, 11:20 AM

One thing to remember is on the Evo VIII, it uses a 9cm2 aka 65 AR roughly turbine housing and the Evo III is a 7cm2 .49 AR roughly. The larger the AR the slower exhaust gas travels through the turbine and the slower boost response you will have at lower rpms. One thing that obviously affects spool and exhaust gas velocity is the turbine wheel which is something we took into account when we made our new turbine shafts. Another thing which will help eliminate any potential bottle necking with the Evo III turbine housing is we will be porting all of the exhaust housings so that should eliminate most of the difference between the higher AR Evo VIII turbine housing. Given that the compressor side will be the same (the stage 2 & 3 we do have to weld a sleeve in like our TD04 19Ts) the only difference is the turbine housing and even that is not a huge difference after we finish porting them and after getting our new turbine wheels.

Its all about the engines VE (volumetric efficiency). At any given RPM an engines CFM flow is based off of several factors. From our estimations and from what we've seen with the Evo's with a 1.5L and the 7cm2 housing ported bigger with a different trim turbine wheel, we should be right on for maximizing the engines VE with the turbos. Things to keep in mind also are that we aren't using a 20 year old compressor wheel or turbine wheel design. Everything is new and has been tested, changed and tested again to maximize efficiency.

Familymans TD05 stage 1 Billet turbos should be done within the next 1 1/2 weeks so hopefully he'll be able to get them on the dyno shortly after that so we can get some results up!

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**mehrshadvr4** · 09-30-2011, 01:27 PM

if you want to test these turbos on stock engine i'm willing to offer my turbos also. my turbos are almost bran new

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**92RT-TT** · 09-30-2011, 01:38 PM

We may do one more test with the stage 1 turbos after we get the results from Familyman, otherwise we'll just be looking for a tester for the Stage 2 or 3.

**familyMAN** · 10-10-2011, 01:21 AM

How are the turbos coming along?

Can you post the evo's and srt4 dyno?

**92RT-TT** · 10-10-2011, 01:44 PM

We finished the fixture to hold the turbine housing in our lathe today so we are going to be starting on machining the compressor housing and the turbine housing. Should be done with everything by wed/thursday. We'll upload some pictures towards the end of the week too.

Here's one of the dyno graphs of our smallest Billet wheel on an Evo VIII.

**familyMAN** · 10-10-2011, 07:19 PM

Not bad. Is that with the same compressor and turbine wheels I am getting?

**familyMAN** · 10-10-2011, 09:09 PM

Originally Posted by mehrshadvr4

in theory yes, but somehow Jrod only made ~730whp on 5857 turbos with td05 hot side at 33 psi. SAF68 made 740awhp @ 22 psi with same turbo but with T3 hot side .SAF68 did have stroker, but i'm not sure how much difference that would make.

On Jrod's 730awhp dyno, I believe he had the 5557's on at the time and only .48 AR (positive it was .48), thus holding up the top end. Since Saf went from .63 dr1000s to 5857, I'm sure he didn't downsize, so he was likely running .63 on the 5857. Unfortunately, not really a good comparison of td05 vs t3. Well, maybe it is a good comparison...a 5557 (or 5857) .48 would need more psi to achieve same peak power as 5857 .63. I am not aware of anyone posting results of a 5857 .63 td05 on either a td05 or otherwise.

Originally Posted by mehrshadvr4

if this turbo makes close to 1000whp or more i will definitely send my turbos to them.

As I understand it, so far they are only releasing the "stage 1" which will not make 1000awhp on a 3S.

**92RT-TT** · 10-10-2011, 10:21 PM

Originally Posted by familyMAN

Not bad. Is that with the same compressor and turbine wheels I am getting?

Yes that is the same combo that you are getting.

Originally Posted by familyMAN

As I understand it, so far they are only releasing the "stage 1" which will not make 1000awhp on a 3S.

As soon as we release the "stage one" we are planning to release stage 2 and 3 soon afterwards. Depending on the results from the stage 1 we may change the combo of turbine shafts and compressor wheels in the stage 2 and 3 to try to optimize them for the 3.0L engine.