08-17-2015, 10:55 AM | #15 |
Drives: 67RS Camaro ,Black 2013 ZL1 Join Date: Jun 2010
Location: Alberta
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The air ingested by the blower is cooling the rotors. The intercooled air is cooling the case which transfers to the blower as well.
Can it stabilize the over all blower temp at 100-150% duty cylce , no not even close. |
08-17-2015, 11:45 AM | #16 |
Speed Freak
Drives: 2013 ZL1 Camaro, 2016 Camaro SS Join Date: Jun 2013
Location: Ardmore, OK
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I just quoted the part I wanted to highlight but you are correct.
Once again, the tests listed by the OP should in fact show that the intake temps are cooler with spacers in situations where the car is not running a lot of boost through the supercharger. But in high demand situations of either continuous throttle or repeated bursts of throttle followed by very short braking zones. The supercharger is in fact hotter than the rest of the engine. As a matter of fact, the supercharger can get so hot it will push the engine water temps and oil temps into the red if you continue to road race the car with high intake temps over 200.
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq
2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date. |
08-17-2015, 07:31 PM | #17 |
So many good points here.
I'll address the case of the road racing or simply stress the blower for a long period of time. If you own a supercharged car, and you want to road race it but your are concerned about blower temps and chamber temps, maybe you might want to rethink your engine setup. Hence why GM went NA on the Z28. There are other means for forced in induction such as a turbo set up, but lets not go too off topic here. So from what I gather, most of the concerns would be the reaction of temp at or more than a 1/4 mile pass. I didn't plan on taking her out to the strip anytime soon, but in the name of "Science" i will consider it. I don't plan on putting down any mind blowing numbers, but the point would be to get the car as hot as possible and see how the temps react. The only down side to this is the fact that I can't control the weather temps and when and where I make my passes, legally. I will however, look into other methods such as back to back dyno runs, or what ever I can think of. I am very open to ideas and suggestions to improve my test/collection of data. Please keep the comments as they are very much appreciated. |
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08-17-2015, 09:27 PM | #18 |
Drives: 2015 Camaro ZL1 Join Date: Mar 2015
Location: Dallas
Posts: 97
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So a question for Jess...
If the spacers isolate the blower from the rest of the engine, wouldn't that reduce the blower increasing the temps in the engine when it gets hotter than the engine? Also, even if the spacers don't lower the blower temps in extended use situations, wouldn't they allow the blower to cool down more quickly being isolated to a degree from engine heat? |
08-18-2015, 10:40 AM | #19 | |
Drives: 2013 ZL1 A6 #7860 Join Date: Apr 2014
Location: CO, USA
Posts: 1,279
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Quote:
Why haven't OEMs just liquid cooled the blower then (intake manifold)? I understand what you are saying but its a little hard to believe... Curious how much heat is generated by an engine (air pump with 10:1 compression) just freely spinning at 6,000 rpm without combustion. Then compare this to a blower (air pump with 2:1 compression) at 25,000 rpm? My money is on most of the heat coming from the combustion and the HP required to hit 200mph is too much for the engine cooling and aero design. No disrespect, but I simply disagree on where the heat is coming from. Not saying the blower doesn't make heat, but can it really make more heat than wot combustion? Does the blower glow red on the standing mile? |
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08-18-2015, 11:08 AM | #20 | ||
Speed Freak
Drives: 2013 ZL1 Camaro, 2016 Camaro SS Join Date: Jun 2013
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Quote:
Quote:
It's not that the supercharger makes more heat than the engine. The internal combustion engine is able to maintain a steady temp no matter how long you run it wide open because of water jackets and radiators. The supercharger relies on the fact that engineers don't think anyone will apply full throttle for more than about 10 seconds at a time. The supercharger temp continues to rise as long as you hold the throttle and the only way to stop the rise is to quit giving it gas. The computer program has limitations built in. Air flow and the rest of the engine actually cool the supercharger when it gets really, really hot. If you get too hot the computer just kills the engine. I have shut my car down due to high IAT2. I don't think many have. But I know there are a lot of people out there road racing with much less power because of reduced timing and high IAT2. The system is supposed to self limit, it will keep reducing power until you are not going fast enough to "overheat" but if you mod the car it is pretty easy to blow through the limitations of the stock supercharger cooling system.
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq
2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date. |
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08-20-2015, 12:50 PM | #21 |
Drives: Black 2012 ZL1 Join Date: Mar 2013
Location: Buffalo Grove
Posts: 433
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So what if those plates were made of metal and had something coming off them like a computer CPU heat sink. Not sure if how it would or could fit but in theory it would help reduce temps (and it might look funny).
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09-08-2015, 07:05 PM | #22 |
Finally got around to running a quick test to make sure the readings are good enough to proceed. Also allowed me come up with a way to interrupt the relation between the points from which I took the reads. I will take better readings later, perhaps with additional temps, when the weather outside is more stable.
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09-08-2015, 09:56 PM | #23 |
KaBoom1701
Drives: 13' ZL1 Red M6 Join Date: Dec 2012
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Interesting stuff guys....
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04-01-2019, 12:00 PM | #24 |
V8 Lounge member #2
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So what ever happened?
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09-01-2019, 08:34 AM | #25 |
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So where's the before and after?
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09-01-2019, 10:59 AM | #26 |
'It's an experiment'
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4 years later - I’m sure he stopped. Has not logged in since March of this year so, likely didn’t finish — I think there was another thread where this was discussed and these are really only good for 1/4 and rolls.
I have the lid spacer but (not the manifold) - it was more for increasing/smoothing airflow to the back 2 cylinders. -Don
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