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275hp at 6500 from a 2.2?

https://forums.pelicanparts.com/porsche-cars-sale/1168171-1970-1971-t-sale.html

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Old 10-17-2024, 09:38 AM
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That would be 101ft-lbs torque per liter; not happening from a 2-valve head without a turbo.

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Old 10-17-2024, 09:49 AM
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Typo? Maybe 175hp.
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Old 10-17-2024, 09:55 AM
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Quote:
Originally Posted by Matt Monson View Post
Typo? Maybe 175hp.
That sounds more realistic. Just not possible with 2.2 liters at 6500 rpm. It would be a very hard task really with a liter more displacement at that RPM.Even then I don't know if it's possible.

I know some Shops have some very "happy" dynos though. One shop in CA (not a Porsche specialist AFAIK) constantly quotes dyno figures yet I've never seen a sheet from them and the stated HP is really impossible for what the motor is. Let alone the camshaft used. They are popular among the Datsun Z guys.

And don't even get me started on the games you can play with chassis dynos. Chassis dynos are good for selling parts and that's about it really.
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Old 10-17-2024, 11:05 AM
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Chris,
A 1970 911s 2.2l makes 180hp at 6500tpm.
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Old 10-17-2024, 11:20 AM
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Quote:
Originally Posted by Matt Monson View Post
Chris,
A 1970 911s 2.2l makes 180hp at 6500tpm.
Matt I was referring to the 275 hp number not being possible. I was agreeing with you. Sorry if that wasn't clear.
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Old 10-17-2024, 11:45 AM
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Typo, or just misinformed
Old 10-17-2024, 11:58 AM
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Quote:
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Matt I was referring to the 275 hp number not being possible. I was agreeing with you. Sorry if that wasn't clear.
Got it now.
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Old 10-18-2024, 05:17 AM
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Mine will be on a dyno sometime around May 2025. If I remember I'll post real world numbers. Best guess is 170-190hp.
Old 10-18-2024, 06:57 AM
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The ad does say it has bigger bores, so it might be a short stroke 2.5 or something similar. But even then, 2.5l ST engines were “only” 250hp., and at 8000
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Last edited by Matt Monson; 10-18-2024 at 09:08 AM..
Old 10-18-2024, 09:06 AM
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I was young and sorta smart, Have the paperwork for the 2.2's. Not smart enough to know about the cam grinds, probably stock 2.0 s. Dyno is strictly for MFI tuning. Data will be a perk.

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Old 10-18-2024, 01:01 PM
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