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370whp new civic si at 8 psi

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Old Nov 19, 2006, 06:32 PM
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Originally Posted by spdracerut
Uh, what kinda crack are you smoking? He's only running EIGHT psi! Lets see what kind of power an Evo puts down with only 8psi. Heck, on my SR20, I was only putting down 230whp/214tq at 7.5 psi.

The K20 is considered by many as the best 2.0L motor made.
How do you think the K20 would do running 20psi on stock internals? The K20 is a good motor but the 4G63 is one of if not the BEST 2.0L ever built.
Old Nov 19, 2006, 08:16 PM
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cool, good to know they are still making power.
Old Nov 19, 2006, 09:52 PM
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Damn, thats hawt..372 whp at 8psi owns!
Old Nov 19, 2006, 10:04 PM
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Originally Posted by NiteRider
How do you think the K20 would do running 20psi on stock internals? The K20 is a good motor but the 4G63 is one of if not the BEST 2.0L ever built.
well considerig IF the k20 could run 20psi on stock internals im assuming it would put down AMAZING numbers Look at the power this guy made on 8 psi? More than that average evo owner does minus the turbo upgrades. Now considering if you spend about a grand to put pistons and rods in one and ran 20 psi you would be looking at 500whp
Old Nov 19, 2006, 10:49 PM
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Originally Posted by NiteRider
How do you think the K20 would do running 20psi on stock internals? The K20 is a good motor but the 4G63 is one of if not the BEST 2.0L ever built.
And how would a 4G63 run with no turbos compared to a K20? The internals (and therefore compression ratio) are designed for the intended purpose of the motor. The fact about the K20 is that it has a very very good flowing head. People have been making 300whp out of them NA.

I'm not some Honda lover either, far from it. Been a Nissan guy pretty much my whole driving life. But I'm also an engineer and I know good engineering when I see it.

Last edited by spdracerut; Nov 19, 2006 at 10:51 PM.
Old Nov 19, 2006, 11:02 PM
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Not bad! Im impressed!
Old Nov 20, 2006, 08:03 PM
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Kudos to that Si.

But comparing the K20 to the 4g63 is apples to oranges. Both are impressive, but in different ways.
Old Nov 20, 2006, 08:19 PM
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Originally Posted by spdracerut
The K20 makes that much power because they revved the **** out of it and it has the best flowing heads of any motor in its class. The ability of the head to flow lots of air allows it to keep that 230tq all the way across the rev range which translates into big power on the top end.

My SR20 head flows ****ty in comparison which is why I make similiar peak torque but it drops off fast up top and limits the power.
+1. honda makes some of the best flowing stock heads i've ever seen. my hatch i had with a 2.3 dart stroker bottom end and stock, unported B16 head with springs/retainers made 529whp/396wtq at 24 psi(stg.5 T3 exhaust, 62-1 compressor-tubonetics)on CAM2 race fuel. there aren't many cars out there that can acheive that amount of power without headwork even throwing more boost than that at them. oh, by the way, i was utilizing stock camshafts as well.
Old Nov 20, 2006, 08:38 PM
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thing was done with a reflash also - no kpro available yet for the car!
Old Nov 23, 2006, 04:14 PM
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Stop hating, and give the car props.
Old Nov 23, 2006, 04:16 PM
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High horsepower is NO GOOD w/out traction
Old Nov 23, 2006, 04:41 PM
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i give it props honda are in 6-7-8 second fastest evo hiting high 8.9 second
Old Nov 23, 2006, 04:47 PM
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sick looking civic...don't wanna see it on the highway lol
Old Nov 23, 2006, 06:29 PM
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i guess youve never looked into the radius arm setup huh?
breaking halfshafts? were your motor mounts shot?
fwd requires some tweaking of the suspension to get great short times
i also launched off a two step for consistency
im not flaming just wondering what went wrong with that setup
our drag civic cracked 1 1.5 short time and consistently hit 1.6s
back in the mid 90s we were running low 11s high 10s and did beat a few cali guys back then but got no props
but actually was in turbomag in the table of contents
I actually plan on building another honda/acura chassis just because i love the 10k rev limits...im thinking a K20 hybrid high compression beast
im sure i will get flames about this but like a few other cars on the road courses will see me pass them when they least expect it...



Originally Posted by AZ EVO IX MR
i used to hav a b18c1 with a full race turbo kit, and it dynoed at 405. couldnt drive the car as a daily driver and at the track with drag radials it would smoke them rolling and with slicks i had problems breaking half shafts. I know what they can do and there is defintaly some impressive hondas But because of my experience with them i would rather be gone of the line rather than wating for traction and then catching up.

Plus i prefer driving my car to the track and going straight to the line, not having to deal with changine tires and such. Just my personnel preference.
Old Nov 25, 2006, 01:50 PM
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Originally Posted by NiteRider
How do you think the K20 would do running 20psi on stock internals? The K20 is a good motor but the 4G63 is one of if not the BEST 2.0L ever built.
The K20 is a pretty stout motor from the factory and are able to hold more power out of the box than the older B-series motors. All that is need is a thicker headgasket to lower compression and maybe some head studs to ensure the head doesn't lift. I'd go as far as saying the F20C in the S2000's matches up with the 4G63. I believe I read somewhere of a F20C putting down a tad over 700rwhp on a stock bottom end with a 3mm head gasket and head studs.


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