I thought about running separate lines, but the guy who built my car (and lots more turbo Zs) says it would be better solved by increasing flow. The coolant wants to take the path of least resisitance, which is the larger lines the turbo line comes off of. He's saying a pump on the first turbo line will take care of the issue. I'll find out soon enough.

:icon18:

So to fix this in short, you keep the same routing that GTM supplied but with larger lines and a pump to push the water?

He doesn't even think you need new lines. We're going to just put the pump in and see if increasing flow solves the problem.

I'm in for that too.... I hope it's the last thing I'll need to fix on this kit....

I thought the issue was temp and not flow. Wouldn't you just be pushing more hot coolant to the other turbo if you only add a pump without splitting the lines before it hits the first turbo? What about adding a Y and then using equal lenght lines to feed coolant individually to each turbo? Then use equal lenght return lines as well.

More importantly, this "issue" is more of an observation made by Nick (esfourteen) a while back. There really isn't any documented failure or temp differences between turbo A and turbo B. For all we know, the setup we have might be ok. We don't know the real effects of the current setup in GTMs kit. How do manufacturers manage this in stock TT V6 cars? How's fast intentions managing it?

Jason has access to plenty, how are GTRs routing their coolant lines to the turbos?

Lol imagine Tony was nice enough to help us out with water lines? it will be hilarious LOL

its taking 3 individual vendors to make GTM kit nearly done.

Im gonna call GTM and see whats up with these water line "issues" if any to see whats up with that.
Im pretty sure if there is an issue, GTM couldve supplied a pump with their kit for additional lets say $50?

Jason was the one who said to just add in a pump. I had gone to him with the idea of adding a new line, but he wants to try the pump first. We'll find out soon enough.

Cool. Keep us posted! Will you be monitoring temps from coolant coming out of the turbos and comparing them to each other?

**** no. That's way too much work. I'm going to watch the OEM temp gauge and see if it stops moving when it's really hot this summer. :roflpuke2:

I need to get a real water temp gauge before summer, then we'll have a better idea how well it works.

Lol

I am sure the reason they did that with the water lines is because that is how the APS turbo kit for the 350z/G35 was. I would assume they just duplicated the entirety of the turbo water line components.

That said, I dont recall any of the APS kit owners having trouble with the water lines to their turbos being in series though. But who knows... maybe its boiling their water and they dont even know it.

The car's own digital reading of water temps is available over OBD-II as well, with any standard OBD-II data viewer/logger. ScanGaugeII (https://www.scangauge.com/products/scangaugeii/) or the Torque app on Android w/ a Bluetooth OBD-II dongle. (and logger systems like RaceKeeper can graph it as well).

I wonder if anyone could dig up the instructions for the old HKS turbo starter kit. I wonder how they were doing the coolant lines since they also use garret BB turbos.

I had no idea people were having these kind of issues with GTM kits. There are some minor things that I would change about my currently installed kit, but they are minor at best.

Oh yeah, Charles strikes again (even though he wasn't trying to take a shot at anyone........"that just happened")

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