99gst_racer
Moderator
- 11,976
- 1,542
- Apr 5, 2003
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Coloma,
Michigan
So, Tyler (turbo23) and myself finally got around to testing pre-compressor injection this past weekend and it went well. This was basically just a test to compare AIT's using various fluids and nozzle sizes.
Set-up specifics: The engine on the dyno was a relatively stock 2.3L Ford engine out of a late 80's Thunderbird. The turbo was a Holset HX-35 running at 22-23 psi. The engine was producing roughly 450HP and 389 ft/lb torque. The nozzles were all mounted in the same location throughout the tests - about 4" away from the compressor nut. The pump used was the Devil's Own 250 psi pump.
Here are the results that we gathered:
No injection;
Before IC temp increase - 29 deg/sec
After IC temp increase - 4 deg/sec
Peak boost 22.09 PSI
------------------------------------------------------
1GPH 50/50 mix;
Before IC temp increase - 19.1 deg/sec
After IC temp increase - 3.0 deg/sec
Peak boost 22.88 PSI
1GPH H20;
Before ic temp increase - 24.2 deg/sec
After IC temp increase - 3.4 deg/sec
Peak boost 23.21 PSI
1GPH Washer Solvent;
Before IC temp increase - 24 deg/sec
After IC temp increase - 3 deg/sec
Peak boost 22.96 PSI
---------------------------------------------------
7GPH 50/50 mix;
Before IC temp increase - 16.9 deg/sec
After IC temp increase - 4.5 deg/sec
Peak boost 22.96 PSI
7GPH Water;
Before IC temp increase - 13 deg/sec
After IC temp increase - 4.7 deg/sec <---no IC fan - OOPS!
Peak boost 22.92 PSI
7GPH Methanol;
Before IC temp increase - 19.3 deg/sec
After IC temp increase - 3.5 deg/sec
Peak boost 23.0 PSI
7GPH Washer Solvent;
Before IC temp increase - 11 deg/sec
After IC temp increase - 3.8 deg/sec
Peak boost 23.3 PSI
-----------------------------------------------------------
10GPH Methanol;
Before IC temp increase - 14.3 deg/sec
After IC temp increase - 3.2 deg/sec
Peak boost 23.05 PSI
10GPH Washer Solvent
Before IC temp increase - 11.2 deg/sec
After IC temp increase - 3.4 deg/sec
Peak boost 22.71 PSI
So, surprisingly enough, our best results were using the 7GPH nozzle and injecting the windshield washer solvent. The "after IC" temp measurements are probably not too important as they only show that the intercooler was doing its job. We did remove the intercooler after the testing and found a small puddle of water right after the intercooler. It was pure water, but it was a very small amount (not enough to cause worry).
Big thanks to Tyler @ Street & Strip for donating his time, his shop, and his knowledge for this test.
Set-up specifics: The engine on the dyno was a relatively stock 2.3L Ford engine out of a late 80's Thunderbird. The turbo was a Holset HX-35 running at 22-23 psi. The engine was producing roughly 450HP and 389 ft/lb torque. The nozzles were all mounted in the same location throughout the tests - about 4" away from the compressor nut. The pump used was the Devil's Own 250 psi pump.
Here are the results that we gathered:
No injection;
Before IC temp increase - 29 deg/sec
After IC temp increase - 4 deg/sec
Peak boost 22.09 PSI
------------------------------------------------------
1GPH 50/50 mix;
Before IC temp increase - 19.1 deg/sec
After IC temp increase - 3.0 deg/sec
Peak boost 22.88 PSI
1GPH H20;
Before ic temp increase - 24.2 deg/sec
After IC temp increase - 3.4 deg/sec
Peak boost 23.21 PSI
1GPH Washer Solvent;
Before IC temp increase - 24 deg/sec
After IC temp increase - 3 deg/sec
Peak boost 22.96 PSI
---------------------------------------------------
7GPH 50/50 mix;
Before IC temp increase - 16.9 deg/sec
After IC temp increase - 4.5 deg/sec
Peak boost 22.96 PSI
7GPH Water;
Before IC temp increase - 13 deg/sec
After IC temp increase - 4.7 deg/sec <---no IC fan - OOPS!
Peak boost 22.92 PSI
7GPH Methanol;
Before IC temp increase - 19.3 deg/sec
After IC temp increase - 3.5 deg/sec
Peak boost 23.0 PSI
7GPH Washer Solvent;
Before IC temp increase - 11 deg/sec
After IC temp increase - 3.8 deg/sec
Peak boost 23.3 PSI
-----------------------------------------------------------
10GPH Methanol;
Before IC temp increase - 14.3 deg/sec
After IC temp increase - 3.2 deg/sec
Peak boost 23.05 PSI
10GPH Washer Solvent
Before IC temp increase - 11.2 deg/sec
After IC temp increase - 3.4 deg/sec
Peak boost 22.71 PSI
So, surprisingly enough, our best results were using the 7GPH nozzle and injecting the windshield washer solvent. The "after IC" temp measurements are probably not too important as they only show that the intercooler was doing its job. We did remove the intercooler after the testing and found a small puddle of water right after the intercooler. It was pure water, but it was a very small amount (not enough to cause worry).
Big thanks to Tyler @ Street & Strip for donating his time, his shop, and his knowledge for this test.