GTM Performance Engineering: MHI Twin Turbo Official Release

SPOHN

That's not his problem. If it overheats that's the drivers fault. Besides our cars have limp mode for that. It will get hot if tracking the car. But there's lots of things that can help for sure. Which is another costly thing. But hardly anyone tracks there FI setup to begin with. So to say it overheats before the end of the road is a huge over statement.

There all about the Supra's anyways.

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SPOHN

I will be upgrading to the Turbosmart Big Bubba. Probably the loudest BOV there is. It's big.




Compared to there typical BOV's

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Infidel

He stated I would not make it home, much less to the track.

Says he's never seen one not go into limp mode no matter what cooling mods were done.

Talked to me like I was an idiot. Wife thought he was very arrogant. No big deal...plenty of supras and GTRs in the shop, he didn't need my money.

SPOHN

Probably best your not going there

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conmam

First, I would like to confirm with a GTM 70mm radiator properly installed, along with using Uprev to reprogram so that the fan turns on sooner ( Maybe at 190F ) with a little more fan duty cycles, along with just a 25 row Setrab oil cooler properly installed, there is NO WAY you will ever get the oil temperature to even close to a limp mode. I have proven it already many times:

Driven at 125F constantly at medium to occasional high rpm for about 6 hours across the San Bernardino county to Vegas , oil temp never exceeded 210F, whereas without the radiator mod , it did get up to 250F ( Even with the oil cooler installed)

Now, if turbocharging the vehicle at 11 psi, it is IMPERATIVE that you must have the cooling system property modified like I did, or else there is a big chance that the Z factory radiator will be insufficient to cool down the additional tremendous heat even with the fan running at all time.... since the darn thing is so crappy cheap with a narrow single row. The alternative for a cheaper cost is to use the CFS radiator, which is a direct fit. While the CFS radiator cooling capacity is not nearly as good as the GTM 70mm radiator, it is still quite a bit better than the factory unit.

These are the links to my GTM radiator installation:

http://www.the370z.com/diy-section-do-yourself/56261-installing-largest-possible-street-racing-radiator-your-370z-part-1-a.html

Installing the largest possible street racing radiator for your 370Z - part 2 FINAL



WARNING : If you blow the engine in anyway, especially the head gaskets, you will severely overheat the engine does not matter what radiator you have. Just a reminder and I am sure everyone knows this.

conmam

That is true, this person surely does not know jack about anything except beer talks. So, yes, SPOHN is right, stay AWAY from that kind of people.

Baer383

Just to point out that the CSF radiator is not a direct bolt in part.

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2013 ZL1

754 rwhp 747 rwtq

SPOHN

That's because it CLIPS in.

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Baer383

Yep after you grind the hell out of the fan shroud.

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2013 ZL1

754 rwhp 747 rwtq

SPOHN

I didn't have that issue

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Baer383

I had to do it twice on two different cars,you must have put yours in the trunk.

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2013 ZL1

754 rwhp 747 rwtq

conmam

That is somehow true on a few of the CSF radiators since their MFG dimension specs are not that great.. But to me, that's not too bad comparing to a complete modification in order to fit the GTM unit in.

G37sHKS

Do you have any datalog comparison between CSF and GTM since you're saying that GTM is better?
Its not all about capacity its about the design, aerodynamics, flow, etc etc. but what the hell do i know anyways.

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conmam

For normally aspirated applications, it probably does not make too much of a difference. But for SC and TT applications, there will be. Try to run hard at full boost for a period of time and the very obvious difference that you will see is the oil temp ( especially at ambient temp at 90F and over ). The goal is to keep the oil temp as low as possible during severe driving condition in order to avoid premature engine damage. Air flow is not much of an issue with the stock fans. When you have the intercoolers in the front, then it is recommended to use a properly ventilated hood, or better yet, is to replace with higher capacity fans.

Look at the GTR. The factory radiator size is a massive dual core and about as large as the GTM unit, The whole system uses about 12.5 quarts of antifreeze just about like the GTM radiator. Yet, the GTR comes stock with only 5 3/4 quarts of oil capacity. There is an obvious reason why a large radiator is needed. Just to keep the fire breathing VR38DETT oil runs cool enough. Well, TT the VQ37VHR to about 500whp will run no less burning hot than the GTR.

G37Sam

True that! Here's what the GTR temps looked like last weekend after a 20 min track session and a cooldown lap

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