Savington

iTrader: (31)

This has been a very long time in the making, but after a supplier switch and several prototypes later we finally have a finished product we are extremely happy with.

Trackspeed Engineering Triple-Pass Dual-Row 76mm Radiator – $449



We are now taking pre-orders for these units. Don’t delay – these will be an in-stock item but pre-order customers will be the first units shipped out when they arrive. We do expect to sell the first batch of units very quickly. Send an email to info “at” trackspeed engineering “dot” com with the subject “Radiator Preorder” and we will send an invoice out. See below for tech information and empirical results.

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This radiator has been designed and tested to keep Miatas cool, regardless of the application. Whether it's a Spec Miata in a draft or a monster-power turbo car with a monster-sized intercooler blocking radiator flow, this radiator has been tested and proven to maintain safe cooling temps in all conditions.
Designed in-house, our unit differs from many current off-the-shelf radiators in two major ways. First, it is a cross-flow unit. Instead of a top/bottom endtank design, the coolant is cycled through the radiator from side to side. Second, it is a dual-core radiator, using a pair of smaller cores over a single larger core. The result is a radiator that offers significant cooling improvements with little or no added weight. Don’t let looks deceive you – our massive 76mm unit weighs approximately the same as a Koyo 55mm unit when filled with water (~21lbs).

The benefits don’t stop with the construction – a year of testing and R&D have allowed us to tweak and fine-tune this radiator in several different ways. In order to gather more air, our unit is taller than the factory unit, bringing the bottom of the radiator closer to the OEM undertray. Airflow management is hugely important in a fast track Miata, and we have not ignored this fact in our design process. Our radiators also come equipped with a 16psi cap and a standard oversized filler neck to make filling easier. The radiator drops into place just as the factory unit does, re-using OEM mounts from your factory radiator on the top and bottom. Large front sway bars provide no issue – an OEM fan with a trimmed shroud or low-profile aftermarket fans will fit on the radiator, even if your car is equipped with a large swaybar. A single OEM fan will locate correctly to allow OEM intake fitment for Spec Miatas. The radiator is compatible with the factory A/C condenser and lines, allowing fast track cars to travel to and from the track in comfort without putting their motors at risk. (The A/C cooling fan is deleted in order to ensure proper fitment of the primary fan.)

Using this radiator, our shop Spec Miata, a 1.6 car, showed coolant temps of approximately 170*F (160*F thermostat) – in 100*F ambient conditions. On a weekend where numerous Koyo 55mm-equipped cars were cutting sessions short due to overheating, and at least one car suffered a motor failure attributed to high coolant temps, we were able to keep the car cool enough to maintain maximum power even after long sessions. It’s a well-known fact that Spec Miatas make more power with lower coolant temps, so for tight-draft running a monster radiator is a must-have item.

My own 350whp/300wtq turbo machine spent the summer running 20-25 minute long stints at full power, with coolant temps never venturing beyond 210*F – a single cooldown lap would bring those temps down to approximately ~175*F. High ambient temperatures always meant truncated sessions with my old 2” CSF core, but regardless of air or track temperatures the car stays cool and safe, thanks to our massively efficient unit.

As with all Trackspeed Engineering products, this is a product that we use and abuse in our own shop cars, and we are proud to offer the same products to fellow enthusiasts.

dgmorr

iTrader: (4)

Are these also a direct swap for the NB?

Savington

iTrader: (31)

No, they are totally different radiators. We are already into prototyping on the NB version, no ETA as of yet.

JasonC SBB

I take it my thick Spals won't fit?:
http://www.jaycorptech.com/pc-57-14-...th-shroud.aspx

Savington

iTrader: (31)

Not sure. I will know more about NB fan fitment once we get a prototype in a stock-motor car - the first one was a custom dual-pass LS-specific version. On NAs, you can fit most any low-profile Spal, but it's gotta be low-profile. I am using a 14" low-pro curved blade on mine with no shroud.

scottyd

I have seen and used the NA one in Sav's turbo car. I've also seen and "experienced" the NB V8 proto as well.

In fact, when I drove Sav's car, he had leaky radiator cap so it wasn't even pressurized. Temps are going to be even lower than what he has been seeing.

These are absolutely gorgeous units and handle the most extreme situations with ease.

thesnowboarder

iTrader: (15)

Got on track this weekend with this radiator, temps never went above 200*F in 94* ambient. I am glad this is in my car, first time I was really able to drive for 20 min without ANY cool down laps.

JasonC SBB

What did you have before? What fans before?

Sav, does this rad use any epoxy? Or all swaged(?) construction ?

Savington

iTrader: (31)

All brazed, no epoxy.

thesnowboarder

iTrader: (15)

koyo 55mm w/ reroute both stock fans wired to come on together. Now ive got two spal fans and this radiator. Both setups were fully ducted. However I currently have a v-mounted intercooler to make room for brake ducts.

JasonC SBB

Hmm, not quite an apples to apples comparison...

Which Spal fans?

thesnowboarder

iTrader: (15)

Agreed, i am not entirely sure i got them from Sav, maybe he can chime in. Two of them fit across the radiator though.

Savington

iTrader: (31)

10" straightblade lowpros.

Apples to apples comparos are all done in the Spec Miata - OEM ducting, single OEM fan, no change except the radiator itself. Temp drops of 40+ degrees going from a Godspeed to the 76mm twinrow.

SlideRuler

Where did you buy those? FM?

Savington

iTrader: (31)

I bought them locally. We can also get them through our suppliers.

JasonC SBB

What sort of oil temps are you seeing and what oil cooler do you have?

Savington

iTrader: (31)

I've been using an Rx7 cooler forever. Temps in the 240-250 range.

j_man

Hey Sav, what about the single row version? How does it perform vs the 56mm Koyo, etc.? According to your info in the other thread it is about 7 lbs lighter ...

emilio700

iTrader: (3)

Just want to chime in. We just received our triple pass for one of our race cars. Very well made piece. After doing lots of research myself, I believe its the best Miata race radiator on the market at any price.

minime

iTrader: (11)

Holy Jebus, that is one chubby ****...

Question - is anyone running Evans NPG+ or NPG-R with this radiator or any other double/triple pass radiator yet? I have a concern about flow/pressure since the Evans has a higher viscosity and runs on zero pressure.