Help me ballpark horsepower/torque on the 2.7 L build

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Type 4 Unleashed
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Re: Help me ballpark horsepower/torque on the 2.7 L build

Post by Type 4 Unleashed »

falcor wrote: Sun Sep 13, 2020 10:51 pm I think you should do a bit better than 160? thats what I get from my 2,3 litre with a Web 163/86b cam and 10:1 compression.
I dont know carbs at all but arent 44's 44 mm in diameter? If so thats 21% more surface area than my 40 mm ITB's.
44's come stock with 36mm Venturi, 40mm Venturi can be had for a fee. And 40mm Venturi are what come stock in 48mm IDf's.

A Venturi change will require a re-jet.
Richard

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falcor
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Re: Help me ballpark horsepower/torque on the 2.7 L build

Post by falcor »

Type 4 Unleashed wrote: Mon Sep 21, 2020 12:42 pm
falcor wrote: Sun Sep 13, 2020 10:51 pm I think you should do a bit better than 160? thats what I get from my 2,3 litre with a Web 163/86b cam and 10:1 compression.
I dont know carbs at all but arent 44's 44 mm in diameter? If so thats 21% more surface area than my 40 mm ITB's.
44's come stock with 36mm Venturi, 40mm Venturi can be had for a fee. And 40mm Venturi are what come stock in 48mm IDf's.

A Venturi change will require a re-jet.
Aaah so my 40 mm itbs correspond somewhat to IDF 48's. Then I guess airflow could be more of a restriction than I had guessed before with the combo of 2,7 liters and smaller throttles. I am guessing it will probably pull hard under 5k but flatten off quicker up top than a less restricted engine?

Thank you Richard, I learned something new today. :)
Tdskip
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Re: Help me ballpark horsepower/torque on the 2.7 L build

Post by Tdskip »

Sorry for the very delayed response Bill – that is fantastic information and thank you very much for sharing it. I must’ve missed the notification that someone replied, sorry!
Tdskip
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Re: Help me ballpark horsepower/torque on the 2.7 L build

Post by Tdskip »

Good morning - dusting this off as I finally got the engine back last week. You guys nailed it - dyno was 162.85 ft pound of torque.
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