Is the EVO IX the most powerful 4-Cylinder ever?

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Jan 16, 2007 | 03:33 PM

#76

.MM

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From: NH

Quote:

Originally Posted by EvoVIII_MR2005

Yah, but look at the torque, a pathetic 162 ft-lbs. And no, the S2000 has a really, really high stock compression ratio, something like 13 or 14:1.

ummm, LMAO!!

the S2k is 11:1

and you CAN turbo the S2k, very easily

the shop that does the work on most of the sports cars around here have more than 1 S2k making over 350whp with a turbo kit on completely stock internals

and 500 whp with race fuel, the the stock block STILL was able to handle it

but the 350whp s2ks have been running flawlessly for over 2 years

turbo kit, aem ems, cams, exhuast, clutch....

matt

Jan 17, 2007 | 07:02 PM

#77

AJsGenerX

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From: Northern NJ

Quote:

Originally Posted by Mr. Stock

660 degrees celsius is over 1200 degrees fahrenheit. At WOT, my turbocharged rotary sees EGT's in the 1,000 C range. The aluminum NEVER sees those sort of temperatures due to the water cooling. So the close proximity of the Sti's turbocharger helps cause the failure...now is it the aluminum that's failing or is the piston/valve, rings, lands going kaput because of elevated temps and knock? If it's the latter, that's not a problem with the aluminum block but rather the engine's layout which you alluded to. I mean the aluminum around that particular cylinder isn't melting away, right? It's not cracking? What about warpage?

You should remember that the STi block is also an open deck designed block to relieve stress and pressures of a forced induction unit. Mitsubishi's Iron 4G63 is the closed deck design. The new 4B11 in the X will be aluminum with an open deck design. I must say though...the 4G63 is bulletproof.

Jan 18, 2007 | 07:44 PM

#78

SOEuro

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the EVos got the most powerful 2litre i think

Jan 18, 2007 | 07:51 PM

#79

Frenchy4g63

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From: Milwaukee

I'll admit I didn't read this whole thread, accually probly like 3 posts, so if someone said this already, then I'm repeating it. The Evo has a turbo, you cant compare it to NA motors. You would have to base it off of a 4g63 without the turbo and a higher compression ratio. Otherwise it's apples and oranges.

Oh, and if I remember correctly, the rx7, and rx8 had the highest power vs. displacement. But that's a rotary, so apples and oranges again, sorta.