Pettit Super Charger Owners
05-21-2008, 07:13 AM
#2103
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Ok --also heat soak in the a/f intercooler is a problem. the engine etc really heats the water left in that area after you turn it off and it takes a while to cool that amount of coolant off. We may need a "turbo timer "type of switch for this a/w intercooler to combat this heat soak problem.
Ray heat exchanger is much bigger and thicker. Really sweet piece of work. I am entertaining the idea of a shroud and dual fans for it. Studys i have read indicate this does NOT block airflow even at high speed.
Ray heat exchanger is much bigger and thicker. Really sweet piece of work. I am entertaining the idea of a shroud and dual fans for it. Studys i have read indicate this does NOT block airflow even at high speed.
I was just thinking about installing a small HeatEx electric fan that I can turn on along with the small electric A/W pump while in between AutoX runs due to exactly what you mentioned above. My only concern in blocking air flow (mainly) to the radiator while driving. I’m also considering relocating the Mazsport cooling mod sending unit to one of the radiator’s hose (not sure if inlet or outlet). I believe that it will pick water temps more accurately than the current location (small coolant reservoir hose). Any advice will be highly appreciated.
05-21-2008, 02:50 PM
#2104
funny you should mention fans--i just picked upa 10 inch pusher and hopefully install tonight. studies are showing that even at high speed it is of benefit. I wish i could find a timer that would keep the a/w pump going for 1-2 minutes after engine shuts down. A timer NOT based on thermostat readings.
I have modified the container to include a hose from the inlet to the bottom of the tank(I WAS LOOSING PRIME)
I have modified the container to include a hose from the inlet to the bottom of the tank(I WAS LOOSING PRIME)
05-21-2008, 02:55 PM
#2106
OD, any new info on the effectiveness of the BHR heat exchanger and why you were losing your prime? I wonder because Phil hasn't had any problems with the pump "unpriming". I wonder if reversing the flow direction and adding a check valve in the line before the "undercooler" might alleviate the issue?
Last edited by Charles R. Hill; 05-21-2008 at 02:57 PM.
05-21-2008, 03:53 PM
#2107
Since we are talking intercoolers here, I hope it isn't in-apprpriate that I mention the performance I have been getting from my air-air job.
Intake air temps (from MAF) as reported by OBDII = around 60 degrees's C (this seems high, but I'm temporarily using a pod filter in then engine bay).
Blower discharge temps 60 (no boost) to 80 (mild boost) degrees C. As measured by a thermocouple and digital meter.
Post intercooler temps inside plenum = 40 - 42, pretty constant. The actual are temp at the intercooler outlet would be less, judging on the "feel" of the pipework. There is heat soak by the time it gets up to the plenum.
So - 20 degree's cooler than "ambient" as the MAF see's it, and 20 - 40 degrees cooler than the blower discharge.
Cheers,
Hymee.
Intake air temps (from MAF) as reported by OBDII = around 60 degrees's C (this seems high, but I'm temporarily using a pod filter in then engine bay).
Blower discharge temps 60 (no boost) to 80 (mild boost) degrees C. As measured by a thermocouple and digital meter.
Post intercooler temps inside plenum = 40 - 42, pretty constant. The actual are temp at the intercooler outlet would be less, judging on the "feel" of the pipework. There is heat soak by the time it gets up to the plenum.
So - 20 degree's cooler than "ambient" as the MAF see's it, and 20 - 40 degrees cooler than the blower discharge.
Cheers,
Hymee.
05-22-2008, 05:30 AM
#2108
Since we are talking intercoolers here, I hope it isn't in-apprpriate that I mention the performance I have been getting from my air-air job.
Intake air temps (from MAF) as reported by OBDII = around 60 degrees's C (this seems high, but I'm temporarily using a pod filter in then engine bay).
Blower discharge temps 60 (no boost) to 80 (mild boost) degrees C. As measured by a thermocouple and digital meter.
Post intercooler temps inside plenum = 40 - 42, pretty constant. The actual are temp at the intercooler outlet would be less, judging on the "feel" of the pipework. There is heat soak by the time it gets up to the plenum.
So - 20 degree's cooler than "ambient" as the MAF see's it, and 20 - 40 degrees cooler than the blower discharge.
Cheers,
Hymee.
Intake air temps (from MAF) as reported by OBDII = around 60 degrees's C (this seems high, but I'm temporarily using a pod filter in then engine bay).
Blower discharge temps 60 (no boost) to 80 (mild boost) degrees C. As measured by a thermocouple and digital meter.
Post intercooler temps inside plenum = 40 - 42, pretty constant. The actual are temp at the intercooler outlet would be less, judging on the "feel" of the pipework. There is heat soak by the time it gets up to the plenum.
So - 20 degree's cooler than "ambient" as the MAF see's it, and 20 - 40 degrees cooler than the blower discharge.
Cheers,
Hymee.
:Cooler?
So you've basically got a two rotor supercharged refrigerator. Which is really cool, pun intended
. Is this an active cooler connected to a cooling circuit, i.e. A/C pump?
05-22-2008, 06:30 AM
#2109
No. Not at all. Actual ambient temps outside the car - that is going through the intercooler is cooling the intake air down cooler than what it is as seen by the MAF. Note - I'm not using a true CAI at the moment while I make an adaptor to the stock air box, hence I am getting abnormally high (IMHO) intake temps from engine bay air.
Cheers,
Hymee.
Cheers,
Hymee.
05-22-2008, 08:28 AM
#2110
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If you could make one that made Slushies that would be great. I can sell the slushies to the kids in the neighborhood or the track to help pay for gas!!
05-22-2008, 11:16 AM
#2114
I have one thermocouple mounted INSIDE the discharge port of the blower, and one thermocouple mounted INSIDE the intake plenum. So yes - I am doing it in 2 places. I could mount a third one in the outlet port of the intercooler, and it would be even cooler again, as there is heat soak between the intercooler and the plenum.
Cheers,
Hymee.
05-22-2008, 11:42 AM
#2115
Ok I am with ya now--sorry for my confusion---yours is a drawthrough type also. that some mighty fine postblower temps. The way i am figuing you are seeing approx 100F intake temps on a very hot day/low humidity(?) with mod boost? Is that is the range for us F freaks who still use a/f's and not lamda!
olddragger
olddragger
05-22-2008, 08:15 PM
#2116
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Old school cool?
Has anyone used water mist/spray nozzles in front of the radiator/heat exchangers to provide a quick cool down?
If you are in competition, use a finer mist to avoid any drips. (you'll get disqualified for drips)
Has anyone used water mist/spray nozzles in front of the radiator/heat exchangers to provide a quick cool down?
If you are in competition, use a finer mist to avoid any drips. (you'll get disqualified for drips)
05-24-2008, 03:39 PM
#2118
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Just got back from dynoing my car. First on a Dynomite Dyno. Ambient temp 91 degrees and 52% humidity. The dyno oxygen sensor broke before a got to the dyno location therefore no A/F readings. Only whp, torque and rpm. I has told by the shop owner that the dynamite dyno readings are lower than the dynojet. But just to compare there were several NA rx8s that dynoed before me (I was the last one for the day) and the best whp attained was 174 whp with I believe CAI and aftermarket exhaust. So my best whp out of 3 pulls was 272 @ 8000 rpm.
05-24-2008, 04:22 PM
#2119
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I added a cooling fan located in front of my ZX12R heat exchanger to help cooling while the engine is off, at idle and in between runs when doing autocross. It turns on along with the intercooler water pump in order to cool down the intercooler. I installed an on/off switch for it and is located where the push start button was supposed to be. See pixs below.
05-24-2008, 04:30 PM
#2120
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I relocated the mazport cooling fan mod sensor (same hose) closer to the cooling thermostat housing for better/quicker response to coolant temp thus turning the radiators fans quicker than before. Cooling is everything!
Last edited by marsredr100; 05-25-2008 at 12:14 PM.
05-24-2008, 04:48 PM
#2121
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Also, want to know how good is my BHR radiator?
I was cruising at 80 mph on I-4, A/C on, ambient temp 93 and engine temp 214 then I exited the interstate and by the time I got to the stop sign (less than 15 seconds) my engine temp was 204. That is 10 degrees drop in less than 15 seconds and a reduction on airflow due to bringing the car to a complete stop. Simply amazing! You should get one for Father Day, operators are standing by.
I was cruising at 80 mph on I-4, A/C on, ambient temp 93 and engine temp 214 then I exited the interstate and by the time I got to the stop sign (less than 15 seconds) my engine temp was 204. That is 10 degrees drop in less than 15 seconds and a reduction on airflow due to bringing the car to a complete stop. Simply amazing! You should get one for Father Day, operators are standing by.
Last edited by marsredr100; 05-25-2008 at 12:15 PM.
05-24-2008, 05:44 PM
#2122
it is really puzzling to me---at 80 mph at 90f with the a/c on my coolant temps are less than 195F and oil temps at 180, and my intake temps at 116-117 or so. But around town I will get the same engine temps but the air intake will be 30-40 degrees higher if I dont use the water meth or extra fan i installed.
Rays intercooler HAS to be more efficent but my intake temps actually went up with it on. maybe it is flowing to fast?
So i am in the process of chasing fleas. I found one thing---the return hose to the water tank rest on the alternator (it gets really hot!)and is in one of the hottest parts of the engine bay. So i am doing some work there--let yall know what I find out---it is 93F here today
olddragger
Rays intercooler HAS to be more efficent but my intake temps actually went up with it on. maybe it is flowing to fast?
So i am in the process of chasing fleas. I found one thing---the return hose to the water tank rest on the alternator (it gets really hot!)and is in one of the hottest parts of the engine bay. So i am doing some work there--let yall know what I find out---it is 93F here today
olddragger
05-24-2008, 07:21 PM
#2124
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05-24-2008, 10:19 PM
#2125
well shielding that hose has made a little difference---damn alternator was 150? on its surface so it heat soaks everything around it quickly. The blow off valve was 155F right after parking also.
Now I also did the trick venting of the oem hood . By the time i had finished it all (as this involve thinking and I am not really fast with that) the sun had set and the day had cooled some---went to my girls high school state championship game(they won---woo hooo!!) and then it was night ---so no fair comparisons yet -- My intake air tonight with ambient of 75 was 93F driving on a 45mph road approx 10 miles and having to stop at redlights etc.
I may also reinstall Rays intercooler WITH A FAN to see if that is makes a difference.
More to come
OD
Now I also did the trick venting of the oem hood . By the time i had finished it all (as this involve thinking and I am not really fast with that
) the sun had set and the day had cooled some---went to my girls high school state championship game(they won---woo hooo!!) and then it was night ---so no fair comparisons yet -- My intake air tonight with ambient of 75 was 93F driving on a 45mph road approx 10 miles and having to stop at redlights etc.I may also reinstall Rays intercooler WITH A FAN to see if that is makes a difference.
More to come
OD