997.2 Intercoolers - Wow!
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Sorry for the delay but wanted to finalize this with the compressor outlet temps and the temps with both .2 coolers installed. Note that member Skandalis now has some additional .2 logs in the 997 section. In short, they thermally outperformed a ~$4k set of anonymous aftermarket coolers by about 30C. Yeah.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 (guesstimate with gauge pressure + intake, IC, and post IC losses) and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 (guesstimate with gauge pressure + intake, IC, and post IC losses) and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
Last edited by earl3; Nov 16, 2010 at 04:44 PM.
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Sorry for the delay but wanted to finalize this with the compressor outlet temps and the temps with both .2 coolers installed. Note that member Skandalis now has some additional .2 logs in the 997 section. In short, they thermally outperformed a ~$4k set of anonymous aftermarket coolers by about 30C. Yeah.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
i would be quite interested in a comparison with a large core IC and these on a 7-900whp car
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Then again if I had a 900whp 996, I probably wouldn't be hassling over budget intercoolers
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GT2RS ICs on a 2009 GT2
Hi earl3, and compliments for the killer thread about IC!!!!
Does anybody know how difficult it is to put GT2RS IC on a 2009 GT2?
I searched the PET catalogue of both models, and though the RS IC have a good price, it seems that a lot of other parts are different: sorrounding airbox + frame, big Y tube, all rubber tubes, gaskets for airbox... it all adds to a lot of bucks if it is really needed to fix everything properly.
I carefully read the thread of earl3 about fitting to the 996 GT2, and it is some work.
Plus, does anybody know if the GT2RS IC are that better in respect to normal GT2 ICs???
THanks for your help, I'll try to exchange with chassis infos if needed. I race the car with slicks on BBS, MOton Motorsport, lightened car.
Does anybody know how difficult it is to put GT2RS IC on a 2009 GT2?
I searched the PET catalogue of both models, and though the RS IC have a good price, it seems that a lot of other parts are different: sorrounding airbox + frame, big Y tube, all rubber tubes, gaskets for airbox... it all adds to a lot of bucks if it is really needed to fix everything properly.
I carefully read the thread of earl3 about fitting to the 996 GT2, and it is some work.
Plus, does anybody know if the GT2RS IC are that better in respect to normal GT2 ICs???
THanks for your help, I'll try to exchange with chassis infos if needed. I race the car with slicks on BBS, MOton Motorsport, lightened car.
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Hi,
done the swap from 996 to 997.2 IC too with great results!
With "little" mods it fits nearly perfekt....
Log from Durametric at 15,4°C ambient temp.
Speed limited to ~250 because of winter tires.
done the swap from 996 to 997.2 IC too with great results!
With "little" mods it fits nearly perfekt....
Log from Durametric at 15,4°C ambient temp.
Speed limited to ~250 because of winter tires.
Last edited by phil996tt; Feb 21, 2011 at 02:31 PM.
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@earl3:
Yes, I extended it. Stribes of spring-steel spotwelded to the cutted originals.
Its about 35°C max at 15,4 ambient temp. But I have to clarify if it also works fine at ambient temps ~25°C.
There is a tendence of increased temps after more then only 3-4 pulls. (show in Log4 -> orange line)
@Landjet:
No, only the ICs!
No other or special parts required!
You only have to modify the ducts like earl showed it in his posts!
Thanks to Earl for this great instruction !!!
Yes, I extended it. Stribes of spring-steel spotwelded to the cutted originals.
Its about 35°C max at 15,4 ambient temp. But I have to clarify if it also works fine at ambient temps ~25°C.
There is a tendence of increased temps after more then only 3-4 pulls. (show in Log4 -> orange line)
@Landjet:
No, only the ICs!
No other or special parts required!
You only have to modify the ducts like earl showed it in his posts!
Thanks to Earl for this great instruction !!!
Sorry for the delay but wanted to finalize this with the compressor outlet temps and the temps with both .2 coolers installed. Note that member Skandalis now has some additional .2 logs in the 997 section. In short, they thermally outperformed a ~$4k set of anonymous aftermarket coolers by about 30C. Yeah.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 (guesstimate with gauge pressure + intake, IC, and post IC losses) and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
https://www.6speedonline.com/forums/...game-over.html
Anyways, I did a quick 2-3 pull on a 15C day to check pre-intercooler temps on both sides. These come up quick and stay pretty constant so no real need for extended pulls here. At 1.2 bar gauge and an ambient pressure of 0.8 bar (density altitude ~6000ft), outlet temps were around 135C on the .1 side and 140C on the .2 side -pretty even in the scheme of things. These temps are in line with a pressure ratio of around 1.7 (guesstimate with gauge pressure + intake, IC, and post IC losses) and around 70% compressor efficiency, so I'm working the K16s pretty hard up in the thin air.
On another 15C day, I was very hard pressed to get the now combined .2 intercooler outlet temps above 40C doing pulls to ~130mph (i.e this backed up my single .2 cooler temp logs).
Based on this, at the end of my pulls @ ~145 mph on the 17C day, the .1 cooler was around 70% efficient and falling (~0.8C/s linear temp increase) with the .2 cooler around 85% and stabilizing (~0.3C/s increase). I would image they'd end up somewhere around 60/80% with a pull to ludicrous speeds but that's just speculation based on the trends. Both were slightly worse on the hotter 23C day. Yes, due to the feedback nature of a turbo/wastegate system, your compressor will have to work slightly harder to overcome the slightly higher flow restriction these dense cores present, but we're talking like a 0.05bar increase pre-intercooler here (based on Champion's flow test brought up earlier). Any additional heat from making up for the slightly higher pressure loss is obviously removed (and then some) by the .2 cores. That's not to say these won't bottleneck on a 700hp car of course but these look like a nice mod for you stock-600hp DIY guys.
best
markski
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
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@markski:
Mine is just on stock, but I also would love to see!
...... Someone want to donate??
They handle 1.6 bar in the stock GT2RS (am I wrong?).
Needless to say that Im not shure how the "plastic endtank" handle 1.8 bar. In addition, its small connectors are not beneficial.
May be you need four of them for your 850HP cars.
hmmm.. but if the endtank is the limiting faktor, and the core works well like it seems for me at the moment,
what about using the 997.2 core with welded aluminium endtanks designed like the plastic ones?
Mine is just on stock, but I also would love to see!
...... Someone want to donate??
They handle 1.6 bar in the stock GT2RS (am I wrong?).
Needless to say that Im not shure how the "plastic endtank" handle 1.8 bar. In addition, its small connectors are not beneficial.
May be you need four of them for your 850HP cars.
hmmm.. but if the endtank is the limiting faktor, and the core works well like it seems for me at the moment,
what about using the 997.2 core with welded aluminium endtanks designed like the plastic ones?
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Wow! Don't ask me how i missed this thread....but subscribed now
Great work earl! reps to you!!!
Jeez there sure was some tussling over the plastic/alloy end tanks..
Hmmm.. if any of the engineers in at PAG got their eyes on this thread....they would be rofl rofling all over the place big time.
Great work earl! reps to you!!!
Jeez there sure was some tussling over the plastic/alloy end tanks.
.Hmmm.. if any of the engineers in at PAG got their eyes on this thread....they would be rofl rofling all over the place big time.