Sizing up the ZZP S3TC Heat Exchanger

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Got a nice but surprisingly light box delivered today, with the new front mounted heat exchanger.

ZZP S3TC FMHE

This one will go below the front bumper, and I plan to use it in series with the OEM heat exchanger.

Here is a shot of my new intercooler cooling team together:

OEM Heat Exchanger and S3TC Front Mounted Heat Exchanger together

Sorry for the rapid image cropping, but I knew you’d want to see it sooner than if I took the time to fix it perfectly.

The new HX arrived with hoses and fittings, so the install should be getting the front clip off again, drilling two holes in the bumper to mount the new HX, putting back in the OEM HX, and then connecting hoses etc.

After the install we’ll get new IAT2 numbers over the test area, and see if I get the expected improvement, or we have some new factor at play here!

Tim C can be contacted at t_coel@yahoo.com for inquiries on the Heat Exchanger, STS-V upper pulley, and new cold air intake.

Cadillac STS-V inline flow-through intercooler tank

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The Cadillac STS-V intercooler cooling system holds a total of 2.6 quarts of coolant.  That’s 0.65 gallons.  The benefit of having little coolant is that it heats up quickly, and it cools down quickly.  However, I wonder if there is more disadvantage to such a low coolant capacity.  The LS9 engine in the ZR1 has a small rectangular intercooler coolant tank inline to hold more coolant.  D3 offers a small cylindrical reservoir for the STS-V to hold more coolant and reports good results.

I have ordered one of these AVS tanks hoping I can find a good spot to fit it:

AVS 1 gallon aluminum tank

The tank is 15.5″ long x 3.5″ diameter with fittings at each end. The 1/2″ fittings will be a bit of a flow restriction for the 3/4″ inner diameter intercooler hoses.

For my next experiment I a hoping to use the OEM heat exchanger with a front mounted heat exchanger in series.  That in itself will add 1.9 Liters (2 quarts) of additional coolant inline.  But I’ll get the tank in hand and see if I can figure out a place to mount it for an experiment another day.  Then we can get some real data to answer this question.

Cadillac CTS leads April 2012 Sales

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Sales for the Cadillac CTS were flat to this period last year, and sales for the Cadillac SRX were down slightly.

Oddly the summary GM announcement says “Other highlights include a 7 percent year-over-year increase for the Cadillac CTS sedan, …” but they perhaps mean retail sales as opposed to totals sales?


 April (Calendar Year-to-Date)
January – April

2012 2011 %Change Volume
2012 2011 %Change Volume
CTS 4,202 4,220 -0.4
16,276 18,519 -12.1
DTS 39 1,906 -98.0
275 6,363 -95.7
Escalade 908 970 -6.4
3,914 4,964 -21.2
Escalade ESV 543 628 -13.5
2,420 2,608 -7.2
Escalade EXT 141 135 4.4
535 604 -11.4
SRX 3,998 4,380 -8.7
17,290 18,339 -5.7
STS 20 887 -97.7
107 2,240 -95.2
XLR 0 1 ***.*
0 2 ***.*
Cadillac Total 9,851 13,127 -25.0
40,817 53,639 -23.9

Summary

Overall Cadillac sales were down significantly as we wait for the STS and DTS replacement XTS and market moving ATS to arrive.

Cadillac XTS arriving soon!

&

Cadillac ATS