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Old 10-27-2018, 11:17 PM   #1
vwbusman66
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Default AW71 and a Holset

I'm fairly certain people are running this combination.
What do you think? I know the big-arse Holset takes a little while to reach full boost, but can it work well?

Obviously, you'd need the supporting mods and most certainly an accumulator mod.
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Old 10-27-2018, 11:38 PM   #2
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Nope never been done.
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Old 10-28-2018, 06:58 AM   #3
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Dude, your better off with a 19t.
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Old 10-28-2018, 09:00 AM   #4
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AW71 can only take so much torque. Before long, it will break.

People put GM transmission behind a redblock because of this.

http://forums.turbobricks.com/showthread.php?t=230831
https://forums.tbforums.com/showthread.php?t=205556
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Old 10-28-2018, 09:09 AM   #5
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What size Holset? how much boost?

On the street a late model AW71 with the accumulator mod and good clean fluid and a good trans cooler should last its entire life at 300-350whp without any issues.

If you plan to drag race it, a better trans cooler with an active fan on it an a 3000rpm stall should also hold up to 300whp for a good long time. Over that power wise you are running on borrowed time.

I ran mine up to the 7000rpm limiter daily without issues, it was always at the drag strip I killed them when hot lapping.
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Old 10-28-2018, 09:43 AM   #6
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thelostartof had seven AW1 on and off his car, so he should know...
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Old 10-28-2018, 11:29 AM   #7
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Dude, your better off with a 19t.
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Old 10-28-2018, 11:35 AM   #8
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Old 10-28-2018, 09:36 PM   #9
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Nope never been done.
Thanks Ken.
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Old 11-01-2018, 05:57 PM   #10
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People say AW71's are good for over 300hp and perhaps a rebuilt one can do that. However in my experience all of the used ones at this point are over 150,000 miles and the fluid is in questionable condition. I just burnt 1st gear in mine last year after running a 15g from when the trans had 207,000 miles up to 240,000. And this was only with occasional thrashing as my 940 car was my daily right up until the begining of this year.
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Old 11-01-2018, 05:59 PM   #11
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Originally Posted by naterhater View Post
People say AW71's are good for over 300hp and perhaps a rebuilt one can do that. However in my experience all of the used ones at this point are over 150,000 miles and the fluid is in questionable condition. I just burnt 1st gear in mine last year after running a 15g from when the trans had 207,000 miles up to 240,000. And this was only with occasional thrashing as my 940 car was my daily right up until the begining of this year.
Did you change the fluid? Accumulator mod? External cooler?
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Old 11-01-2018, 06:02 PM   #12
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Transmission is rated by torque number, not HP.

Is that 300hp with 150lb ft or 300hp with 450lb ft? Big difference in transmission needs.
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Old 11-01-2018, 06:12 PM   #13
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it will last for a long time if you do what lostartof said. mine never blew and I was so mean to that transmission. also get a good converter, if you run the holset with a stock converter it will be dog**** slow.
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Old 11-01-2018, 06:46 PM   #14
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Did you change the fluid? Accumulator mod? External cooler?
No accumulator mod. Honestly there is a chance the new fluid killed it when I flushed it and added an external cooler. But that's more of a testament to the condition of used AW71's these days
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Old 11-01-2018, 08:25 PM   #15
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Quote:
Originally Posted by tryingbe View Post
Transmission is rated by torque number, not HP.

Is that 300hp with 150lb ft or 300hp with 450lb ft? Big difference in transmission needs.
301whp and 326ft lb's of torque. . . all day long with a 3000rpm stall.
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