Quote:
Originally Posted by MatadorRacing_F1
Peak hp rarely comes at the same place as peak tq.
Really, I'm not expecting 180 ft-lbs, that'd be setting myself up for disappointment, as 180ft-lbs from a 2.0 engine that isn't FI or a diesel is pretty hard. I did say what would make me happy didn't I?
I do however expect at least 165ft-lbs, ~140-150 being the market standard and ++the compression ration w/ direct injection ought to net a pretty decent torque improvement.
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i know what you meant, just wanted to clarify that for everyone else.
for a very conservative estimate, i ran some numbers using Ford's Duratec 2.0L they use in their new Focus as a base.
if we say 145ft.lbs @ 5500rpm and a 10% torque loss @ peak HP at 7000rpm, we get 174hp. like i said, a
conservative estimate. i'm just going off of other 2.0L na engines, using some basic math, and applying a little bit of logic. i really think my K20 analysis will be closer to FT86 numbers.
here are some more:
corolla 1.8L: i used a linear torque multiplication going from 1.8L to 2.0L, which gives a peak of 142ft.lbs. 10% drop at HP peak gives 170HP @ 7000rpm. again, i think we can assume numbers will be higher due to the (hopefully) increased compression and direct injection. really, it's looking more and more to me like 150ft.lbs and 200hp is pretty reasonable.
subaru 2.5L: i was kind of surprised by this one. noted a 12% torque dropoff at peak HP rpms. anyway, dropping from the 2.5L back to a 2.0L gave 136ft.lbs and using the 12% drop, 160hp @ 7000 rpm. let's keep in mind that the 99-00 Civic Si had less torque and the same HP, similar weight (we hope) and FWD, yet it's still a fun car to drive.
one very important thing to keep in mind is what kind of fuel is being used. the K20 requires premium, while the Ford, Toyota, and Subaru engines i used all run on 87 octane. i will happily pay for premium if the performance lines up with the K20 as opposed to the others.
-Mike