Pokey's Z4 3.0i Build

[Exist]

Did you have your Cosmos CAI before your exhaust? How did it sound?

[pokeybritches]

Originally Posted by Exist

Did you have your Cosmos CAI before your exhaust? How did it sound?

The intake was my first mod. It's been about 7 years, but I remember it made the engine growl sound meaner and louder. If I was to do it again I would go with the Dinan intake and do the sound generator mod for volume.

[pokeybritches]

1st and 2nd gear

[Exist]

Originally Posted by pokeybritches

The intake was my first mod. It's been about 7 years, but I remember it made the engine growl sound meaner and louder. If I was to do it again I would go with the Dinan intake and do the sound generator mod for volume.

Sound generator mod? Like a golf tee mod?

[pokeybritches]

Updated with lightweight flywheel info.

[pokeybritches]

Added Tial QR review.

[Exist]

Link to the intake you used?

[pokeybritches]

Originally Posted by Exist

Link to the intake you used?

Which intake?

[RossBMWZseries]

Just when I think I'm organized, I run into something like this 😡

Great thread Pokey. I would've never thought or imagined that a non M would sound that good. In fact, I may like the sound more than the M's I've heard online.

I used to have a Cosmos CAI in my 1.9 Z3. Really woke up the car, sounded more than just a 4 banger. AAAAAND my top speed went from 116 to 120MPH lol

[Bmwteo]

Have you ever had any heat issues with the supercharger?

[Steeler]

Originally Posted by Bmwteo

Have you ever had any heat issues with the supercharger?

Welcome.

I can answer your question.

You will get heat soak with the supercharger in hot weather if that is what you are asking.
I have not had any issues mechanically with my Vortech.

I recently added an Intercooler to my setup, which works quite well.
I know Pokeybritches is also looking into doing the same.

[Bmwteo]

Thanks, i just got my g-power kit for the 3.0i z4 and its non-intercooled thats why i wanted to know if i will experience any power loss during hot weather

[pokeybritches]

Originally Posted by Bmwteo

Thanks, i just got my g-power kit for the 3.0i z4 and its non-intercooled thats why i wanted to know if i will experience any power loss during hot weather

Cooler air is always better. I am running both water/meth injection and ethanol to reduce detonation. The standard off-the-shelf kits are fine to run without intercooling. You'll have more power than stock even when it's hot.

[3GFX]

Heat soak is definitely an issue on any supercharger setup for the Z.

The nature of the manifold doesn't allow for a lot of space to pipe an intercooler into the system/car easily (but it's theoretically not impossible). At one point G-Power did make an intercooler as part of their kit for the Z4, but it's impossible to find ANY information on it. I even reached out to G-Power and some of their distributors when I first started looking for a supercharger.

I'm running what is essentially a air-water intercooled manifold on the ESS TS2 kit. On a hot day with no fans or air running at the front of the car. The heat soak caused an almost 30whp loss between first and second run. This summer with one extremely hot day at the track I notice power loss and issues with drivability at high RPM (which may have been the old coils which I have since changed).

Running an intercooler or methanol injection would be appropriate depending on your goals.

[Steeler]

Originally Posted by 3GFX

Heat soak is definitely an issue on any supercharger setup for the Z.

The nature of the manifold doesn't allow for a lot of space to pipe an intercooler into the system/car easily (but it's theoretically not impossible). At one point G-Power did make an intercooler as part of their kit for the Z4, but it's impossible to find ANY information on it. I even reached out to G-Power and some of their distributors when I first started looking for a supercharger.

I'm running what is essentially a air-water intercooled manifold on the ESS TS2 kit. On a hot day with no fans or air running at the front of the car. The heat soak caused an almost 30whp loss between first and second run. This summer with one extremely hot day at the track I notice power loss and issues with drivability at high RPM (which may have been the old coils which I have since changed).

Running an intercooler or methanol injection would be appropriate depending on your goals.

Apologies for the oversize and crappy pics
It is definitely tight in our engine bays but an A/W IC can be done with a Vortech.
My IAT gauge on the dash which reads from just in front of the blow thru MAF shows temps are below 100f consistently on warm days. Josh may be able to elaborate on the IC effectiveness based on the logs I sent him.

[3GFX]

Problem on my setup is the MAF being before the manifold which is where the heat soak is. It's tough to tell actual temps unless I find a place to tap into within the manifold. Not a big fan of fiddling with that casting.

Ideally I want to get a water temperature gauge into the intercooler cooling line (easier to do that the manifold) and see exactly what those temps are since the water is running straight through the cores of the of manifold. If I can keep the intercooler cool, the air will be cool. I've looked into an auxilary fan setup as well for the intercooler to keep the pump and water running through the system to cool down the cores.

[pokeybritches]

Originally Posted by 3GFX

Problem on my setup is the MAF being before the manifold which is where the heat soak is. It's tough to tell actual temps unless I find a place to tap into within the manifold. Not a big fan of fiddling with that casting.

Ideally I want to get a water temperature gauge into the intercooler cooling line (easier to do that the manifold) and see exactly what those temps are since the water is running straight through the cores of the of manifold. If I can keep the intercooler cool, the air will be cool. I've looked into an auxilary fan setup as well for the intercooler to keep the pump and water running through the system to cool down the cores.

I'd look at increasing the size of the front-mounted heat exchanger first, then increase water capacity through an additional tank next.

Measuring supercharger coolant temp seems like the way to go in order to get an idea of IAT. You don't want to measure IAT anywhere separately from the MAF if the readings are going to be used by the ECU for fuel and timing calculations.

While a blow-through MAF isn't feasible on a twin screw setup, it is possible with a centrifugal supercharger. Dave and I have found through destructive testing that the OEM BMW MAF doesn't last long in a blow-through application. Additionally, max reading with the OEM MAF is 1024 kg/hr (350-360 hp, give or take). I'm working on a MAF solution, which takes both a change to the ECU's program code and additional hardware to measure higher than 1024 kg/hr. Most tuners just layer on extra fueling at high rpm, which isn't the right way to go considering the axes max out at 6600 rpm (and I'm fairly certain none know how to correctly recalculate the checksum that prevents manipulation of the axes).

Dave's intercooler setup works extremely well on the street, with IAT only changing by a few degrees under boost. His car isn't heavily tracked, but I have measured loads of 1100 mg/stk, which is almost twice what a stock car sees.