Category Archives: STS-V

Meziere 55 gpm intercooler pump?

Posted on by
3

Meziere 55 gpm intercooler pump sounds even more pumped up than the Jabsco 29 gpm pump.  Torq has a kit for the Camaro ZL1 with the pump mounted to a bracket and ready to bolt in for that app.  They have been doing test and just announced the kit on Camaro5.

Meziere 55 gpm pump

Meziere 55 gpm pump with bracket and wiring

After getting my Jabsco pump experiment together I appreciate that Torq is offering a complete ready to install kit for the ZL1.

The Meziere 55 gpm intercooler pump would be a remote mounted 12v pump like the Meziere Enterprises WP365S.

Meziere 55 gpm intercooler pump

Meziere WP365S

I have emailed Meziere to ask for a pump performance curve, not having found one on their website.  The pump performance curve shows measured output of the pump at various system resistance points.  Considering the curve versus the system resistance curve would let us estimate how the pump would flow in an actual intercooler system.

Assuming that the Meziere 55 gpm intercooler pump has a higher shutoff pressure than the Jabsco pump, and a similar pump curve, it should have higher flow.  Lots too many ifs until we can get a pump performance curve, but if I had to guess I would say that it might do 8-9 gpm in a system.  So with my 2 heat exchanger system, and an inline tank, the OEM 8 gpm pump does 3.5 gpm, the Jabsco 29 gpm pump does 4.5 gpm, and the Meziere 55 gpm intercooler pump might do 8-9 gpm.

Keep in mind that as the flow goes up, the pressure goes up more.  These are centrifugal pumps, so as the pressure goes up they have less flow.  By comparing the system curve and the pump curves we can predict the spot where the pump will work, once we have the pump curve.  I’ll update if Meziere shares that spec.

Summary — Meziere 55 gpm intercooler pump

Torq, in concert with Meziere, is offering an intercooler pump upgrade ready-to-install kit for the Camaro ZL1.   In their bench tests the kit was advantageous.   The kit could be modified to work with the Cadillac STS-V or CTS-V.  I have not tested the Meziere 55 gpm intercooler pump to determine exactly how it would flow in our systems.  This is a more expensive pump, although I have not seen a price quote from Torq yet.

Torq main website

Cadillac Detailing — Preparation

Posted on by
Reply

Working on some Cadillac detailing on my 2008 Cadillac STS-V.  I spend a lot of time on mods and tinkering and don’t spend enough time on grooming so I am trying to get my shine on.

Click on the thumbnails for fullsize images, then hit back to return.

Started with the wheels before dinner, since they can be hit with the sun up.  I used a wheel brush, water, and some spray-on wheel cleaner.  Even with some hard scrubbing the wheels could be cleaned up from here, and I’ll need to revisit them again.

Once the sun was behind the houses I rinsed, then used the 2-bucket method with car shampoo to quickly get enough dirt off so you can tell there is a Cadillac under there.  In the two bucket method, one bucket is clean water and one bucket is the mitt or microfiber rinse bucket.  Pull water/shampoo from the clean bucket, apply to Cadillac, rinse the mitt or microfiber out in the rinse bucket, wring it dry, repeat.  The rinse bucket gets dirty quickly, which confirms that you are pulling dirt off the car and into the rinse bucket and not into the clean bucket.

Hopefully if the weather holds I will be out before breakfast in the morning light and get more cleanup and waxing done.  I should have planned ahead and invited @berrylowman to give a master’s class in quick detailing.

Intercooler pump test 4: Jabsco 29 gpm pump

Posted on by
13

Update: IAT2 test results added

Today I performed an intercooler pump test on the Jabsco 50840 12v pump as a replacement for the Bosch OEM intercooler pump in my Cadillac STS-V.  The Cadillac STS-V uses the Bosch 00 392 022 006 pump.

My Cadillac has a 2nd heat exchanger, an S3 provided by Timmy C, and uses a 1 gallon AVS inline intercooler tank.  The goal of these tests is to improve intercooler cooling, which will enable the supercharged V8 to make more power.

Test setup with Jabsco pump in the loop

Intercooler pump test setup

To run a bucket test I put a FROM bucket at intercooler height, flowing into the pump and system, and out from the intercooler to a TO bucket.  This is similar to my previous intercooler pump test setup, for continuity.  I have added a TO bucket that is a mixing bucket which makes it very easy to measure output.

Predicted intercooler pump test flow:

Pump rated flow vs head pressure and system pressure curve

The Jabsco centrifugal pump does 29 gpm against no resistance, and the Bosch pump does 8 gpm against no resistance. In an actual system the pump curves overlaid with the system resistance curve predict where the pump will actually run in that system.

Intercooler Pump Test Results

In today’s test the Jabsco pump measured at a steady 2.25 gallons per 30 seconds, or 4.5 gpm (gallons per minute).  Previously, the Bosch OEM pump ran at 3.5 gpm, which would suggest the system pressure at that flow was 6 psid.  As flow increases, the resistance pressure in the system increases roughly at the square of the flow.  I expected the Jabsco pump to run 4.3 gpm, so the 4.5 gpm is good.  The Jabsco has 1/3.5 = 28.5% more flow than the OEM pump.

I still have more work to do to complete pump installation.  I will retest with the pump in place.  I will follow-up the intercooler pump test with IAT2 tests to see how the new higher flow impacts intercooler cooling.

Continuing to modify and fit check the Jabsco pump on the OEM bracket.

Intercooler Pump Test Update

Today I completed the pump install and conducted a test run with the new pump:

Intercooler pump test showing IAT2 over time during a 20 min drive

Click on the graph for a larger version.

What this graph shows is temperature in degrees F on the Y axis, over a 20 min drive on the X axis.  Spikes in the graph represent acceleration runs.  The red line is the OEM pump without the inline tank; the blue line is the OEM pump with the inline tank; the green line is the Jabsco pump with the inline tank.  Today it is 92F ambient; on the prior test days it was 90F ambient air temperature.

I read this test result to show that the jabsco pump’s greater flow allows the system to reach an IAT2 equilibrium temperature of 118-120F, an improvement of 7F.   The acceleration spike is a 20F increase, an improvement of 5F in addition to the lower equilibrium, so that at peak temps are 12f lower than previous hot day.

Intercooler pump test conclusion:

The Jabsco pump has a 1 gpm higher flow than the OEM Bosch pump.  This 1 gpm greater flow lowers the operating IAT2 temps by 7F

Ambient temp 92F; ambient air temp resets to 32f until the ecm can determine actual temps. Near gear change at top of 2nd gear.  Losing 1 degree of advance to IAT2 retard.