Transaxle cooling, pics of cooling setup |
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Transaxle cooling, pics of cooling setup |
brumi |
Aug 13 2012, 07:30 AM
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#1
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Newbie Group: Members Posts: 10 Joined: 30-May 12 From: new york Member No.: 14,498 Region Association: North East States |
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larryM |
Nov 8 2012, 10:35 PM
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#2
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emoze Group: Members Posts: 891 Joined: 1-January 03 From: mid- California Member No.: 65 Region Association: Northern California |
but - WHY ??
it makes sense for a 24-hrs enduro World Makes Championship run in 1970-72 but vintage racing today is only about 15-20 minutes on track so why bother -?? (yep - i know - i BTDT - old age now questions the folly of my youthful fevers) . |
naro914 |
Nov 9 2012, 04:19 AM
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#3
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Losing my mind... Group: Members Posts: 2,476 Joined: 26-May 06 From: Charlotte, NC Member No.: 6,073 Region Association: South East States |
but - WHY ?? it makes sense for a 24-hrs enduro World Makes Championship run in 1970-72 but vintage racing today is only about 15-20 minutes on track so why bother -?? (yep - i know - i BTDT - old age now questions the folly of my youthful fevers) . Are you asking "why bother with trans cooling"? Agreed, if you're running stock engine, wheels, etc. probably no need. But I'm pushing 330 +/- hp with the stress of 12" wide slicks through a basically stock 901 trans that was build with about 100 hp in mind back in the day... THAT'S why. Plus, PCA enduro races are 90 minutes. |
brant |
Nov 9 2012, 09:22 AM
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#4
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914 Wizard Group: Members Posts: 11,639 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
With the trans cooler:
I'm getting 220 degree's after 20 minute vintage race with a 2liter on an 80 degree day at coronado island/sea level (I also ran at hallet, oklahoma which is 900ft above sea level. I still ran 220 on an 80degree ambient day) imagine what I was getting before the cooler at the event I blew the trans up last july. It was a 110 degree day and we had 2 drivers on the car that day, running back to back sessions at 5000ft of elevation where the air is less dense and cooling less efficient by far... I didn't have a gauge on it then, but I'm guessing 260f or more is the norm without a cooler (in a 20 minute session with a tiny 2.0 motor) I also would theorize that lower gears, smaller diameter wheels, more rpm and definitely a clutch limited slip differential would add to the heat problem if a person has any of those contributing factors. putting a gauge on the tranny is a real eye opener... no wonder everyone has always said the 901 couldn't handle high hp. I still believe its a 250hp tranny but that keeping oil temps in check is mandatory just like you would for a motor. for example, you don't hear people recommending to skip front coolers on race cars or that its a waste of time to install an oil temp gauge for an air cooled motor. brant but - WHY ?? it makes sense for a 24-hrs enduro World Makes Championship run in 1970-72 but vintage racing today is only about 15-20 minutes on track so why bother -?? (yep - i know - i BTDT - old age now questions the folly of my youthful fevers) . Are you asking "why bother with trans cooling"? Agreed, if you're running stock engine, wheels, etc. probably no need. But I'm pushing 330 +/- hp with the stress of 12" wide slicks through a basically stock 901 trans that was build with about 100 hp in mind back in the day... THAT'S why. Plus, PCA enduro races are 90 minutes. |
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