4 Point 0

4.0 TiAL

4.0 3D Printed metal

e46_ema

Looking great! Can’t wait to get mine!

4 Point 0

So many extra nice sounds now. I can’t wait to hit the track again to hear it under full stress.

e46_ema

What do you hear more of? Spooling and discharging sounds?

4 Point 0

Rushing Air sounds and turbo spooling up.

My old M4 had an MSR intake, the pod filters in the grill, and it sounds like that did.

My car already had a pussssshhhhhh let off at the end of the straight. I can’t wait to hear that now. Especially when i start to increase the boost more.

e46_ema

Thanks for sharing! I’m excited. Enjoy it!

4 Point 0

Had the car on the dyno today. There still seems to be something holding it back.

I’m pretty sure its the 300 Cell Akra cats. They were fine at tuned GTS levels, but It’s time for them to go.

AlexZTuned

Do you know what brand Akrapovic uses for their cats? I’d imagine they’re high-end GESI or HJS cats which have very little flow restriction so I’m not quite convinced that’s your bottleneck. Flow wise many are more than capable of supporting 500 hp per cat.

You added a substantially larger exhaust turbine wheel but I don’t think that would cause excessive back pressure in the exhaust - you’re still running stock frame hybrids, not giant twins.

Hope you get it all sorted - sounds like it could be a tuning/torque limit issue.

4 Point 0

Akrapovic use HJS. There is something holding it back because we can easily increase the boost by 4-5psi, the turbo’s make the boost, but it is not increasing the power.

On the fourth run, IATS were 200F. So we gave up.

It could be the intercoolers, but you would think they would
be ok for the first run.

I had a V8 M3. I put 200 cell metallic cats on it about one month prior to getting it tuned. Took it in and on the dyno whilst tuning, the tuner said, there is something wrong. You are barely making stock power. We noticed a light under the car . It was the cats glowing red.

We cut them out, went catless, put it back on the dyno and bingo, all the power appeared. Granted they were not Alrapovic cats, just cheap ones, but they were seriously clogged after one month. They looked like they had a film of mud in the mesh.

So the cats are dead to me. 🤣. My Tubi catless that i ordered forever ago, are due to arrive 16th Nov. booked to be fitted on 25th. (Incase shipping delay) I’ll redo the dyno again.

Fun fact, Tylers car is basicly running a dump pipe off the turbo. No cats, no cans (Exhaust). Nothing.




Tubi

3DMetal

You need to install turbine inlet pressure sensors. Drill a hole in the collector and weld in a pressure tap.
could be the intercoolers.. your reaching a choke point somewhere.

4 Point 0

Oh I know its the intercoolers. It’s my way of protesting, leaving them until last.
I’d already sprung for AMS intercoolers a few years ago.
It annoys me that they aren’t up to the job.

Can you explain the differences of the TiAL vs AMS?

I was working on sound.
I should see some flames with the Catless Tubi.
I’m loving all the extra sounds of the TiAL tubes.

VektorPerformance

My bet is on the turbine being choked. If you're making boost with no power, the exhaust flow is choked somewhere. Good cats will leave some power on the table, but if they are quality units and sized properly, it shouldn't be a lot.

With your goals, it's time to level up with either an EWG setup, or custom turbo kit with performance turbos and EWGs. I'll take quality boost over turning it up any day. You'll make better power, more power, and improve many factors that affect longevity, like manifold back pressure, EGTs, and cleaner cylinder fill.

fsmich

Could Tial make a high performance intercooler with the PWR rolled tube core? CSF has one for the 992 Turbo they claim reduces heat soak. I'd be a customer

thesaintusa

Completely agree.

Would be curious to know what the pressure drop across the IC is at your max boost @4 Point 0 ? Tapping into inlet/outlets would give some insight.

I am surprised that the cats are a bottle neck as they are supposed to be HFC.

@4 Point 0 thanks for continuing to push the platform and share your experience/insight!

spdracerut

High flow are still a restriction I think pure motorsport cats used in FIA racing series are 100 cell. For ultimate performance, completely open exhaust. The turbine is a pressure multiplier. So whatever the backpressure in the exhaust is, it gets multiplied by the pressure ratio of the turbine operating point.