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Question about this turbo

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Old Nov 22, 2023 | 09:26 AM
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A friend of mine has run this turbo with his 352ci SBF for about two years.

I'm just curious, what is the true power output of this turbo? I'm not asking for me, and he's changing this out for most likely a borg 85/96.

This seems like a pretty small turbo to me, he said it was maxing out pretty quick started seeing a lot of backpressure at 20 lbs.

https://www.garrettmotion.com/racing...lEb1YXic3SVMFc
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Old Nov 22, 2023 | 11:06 AM
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I love the warning about over speeding.
It's almost like Garrett knows what racing classes this turbo will end up in lol.
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Old Nov 22, 2023 | 11:18 AM
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He said this turbo is good for an Audi, a Supra. I came to a similar conclusion it seemed undersized for what he's been trying to do, go 5.20-5.40s.
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Old Nov 22, 2023 | 11:48 AM
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He could always just add another.
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Old Nov 22, 2023 | 12:52 PM
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It's basically a 7975 like most, but it has the better G series 9 blade turbine that everyone copies and Garrett quality etc. In this frame of turbo I don't see anything better than it, sure you can and need to go larger to feed a 351 ci engine at higher boost levels required for those et's. Curious on the backpressure at 20psi and what turbine housing he has, it should be the 1.28 if he had the choice.

I just don't see the larger compressor/ smaller turbine working well in the larger v8 land. I'd guess the 7375 version of this turbo makes almost the same power with a bit less backpressure.
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Old Nov 22, 2023 | 03:39 PM
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I will ask what turbine housing.
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Old Nov 29, 2023 | 07:36 PM
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Originally Posted by Pro Stock John
A friend of mine has run this turbo with his 352ci SBF for about two years.

I'm just curious, what is the true power output of this turbo? I'm not asking for me, and he's changing this out for most likely a borg 85/96.

This seems like a pretty small turbo to me, he said it was maxing out pretty quick started seeing a lot of backpressure at 20 lbs.

https://www.garrettmotion.com/racing...lEb1YXic3SVMFc
What's "a lot" of back pressure? The intake to exhaust pressure ratio is what's important. I can't believe that his back pressure exceeded much over 20psi, which would result in a good 1:1 pressure ratio. Was his back pressure 30psi? Details matter.

Andrew
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Old Nov 29, 2023 | 08:32 PM
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I'll ask him.
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