How much horsepower do you think a stock k20z3 can handle??? - K20A.org .:. The K Series Source . Honda / Acura K20a k24a Engine Forum
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Old 01-28-2011, 05:07 PM   #1
SilverEp3hatch
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Default How much horsepower do you think a stock k20z3 can handle???

I was just wondering because im getting a swap for my ep3 and i want to turbo it with stock internals. What kinda numbers do people make with stock internals and still be reliable. Im going to have K-pro as well and tune on the dyno.
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Old 01-28-2011, 06:38 PM   #2
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Default Re: How much horsepower do you think a stock k20z3 can handle???

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I was just wondering because im getting a swap for my ep3 and i want to turbo it with stock internals. What kinda numbers do people make with stock internals and still be reliable. Im going to have K-pro as well and tune on the dyno.
ive heard 500 and engine hasnt been blown. mind u i think thats pushing it.
i have type s and have 350 on stock internals. so im sure u can get 300ish at least with a good tune.
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Old 01-29-2011, 04:25 AM   #3
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Default Re: How much horsepower do you think a stock k20z3 can handle???

Is there anyone out there thats turboed a k20z3 or k20a2 with stock internals? If so what kinda numbers are you making? Does anyone know how strong the pistons and rods hold up against 350 horse power? I now on b16a and b18c you dont really want to go over 280 hp to keep it reliable. What about the k20?
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Old 01-29-2011, 05:32 AM   #4
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Default Re: How much horsepower do you think a stock k20z3 can handle???

I know 2 people personally with over 500hp on stock K series internals. One is a K24a4 making 518hp (http://www.k20a.org/forum/showthread.php?t=63867) and the other is a stock K20a2 making 618hp (http://www.k20a.org/forum/showthread...highlight=6262). Both are up here at ~5500' elevation on E85. There are a few other people on here that are making 500+hp on stock internals as well, so 350hp really isnt much to worry about. Get a good tune and good fuel and you should be good to go.
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Old 01-29-2011, 07:52 AM   #5
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Default Re: How much horsepower do you think a stock k20z3 can handle???

Alot man
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Old 01-30-2011, 03:55 AM   #6
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Default Re: How much horsepower do you think a stock k20z3 can handle???

those are good links k20eg. Does anyone have anymore dyno sheets of stock internal boosted k20a or k24a post here.
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Old 01-30-2011, 04:09 AM   #7
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Default Re: How much horsepower do you think a stock k20z3 can handle???

Here are a few links I found on here in the forced induction section
http://www.k20a.org/forum/showthread.php?t=85438
http://www.k20a.org/forum/showthread.php?t=77322
Not completely stock, but stock block - http://www.k20a.org/forum/showthread.php?t=83582
http://www.k20a.org/forum/showthread.php?t=55035
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Old 01-30-2011, 04:09 AM   #8
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Default Re: How much horsepower do you think a stock k20z3 can handle???

d-rob on here has a stock internal k20a2 pushig 500 on e85... was at 450 (i think) while on 93
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Old 01-30-2011, 06:03 AM   #9
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Default Re: How much horsepower do you think a stock k20z3 can handle???

thanks just the links i been looking for.
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Old 01-30-2011, 11:10 AM   #10
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Default Re: How much horsepower do you think a stock k20z3 can handle???

You will need to be very careful with the tune, and I would recommend E85 or water/methanol, if you are on pump fuel.

My thread is located at:
http://www.k20a.org/forum/showthread.php?t=86410
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Old 01-30-2011, 05:13 PM   #11
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Default Re: How much horsepower do you think a stock k20z3 can handle???

ok use e85 because of the higher compression right.
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Old 02-01-2011, 11:46 AM   #12
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Default Re: How much horsepower do you think a stock k20z3 can handle???

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ok use e85 because of the higher compression right.
Yes its 105 Octane, and all the temperatures will be cooler as ethanol burns cooler than unleaded fuels.
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Old 02-01-2011, 07:26 PM   #13
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Default Re: How much horsepower do you think a stock k20z3 can handle???

The problem is not the internals of the engine. They are good for around 500hp but the tranny doesn't like the torque that comes with those numbers and you will end up grinding off the gears. Have a look at 8thcivic.com. There are a lot of guys pushing high 400's and low 500's just fine but with tranny issues
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Old 02-01-2011, 07:29 PM   #14
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Default Re: How much horsepower do you think a stock k20z3 can handle???

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Yes its 105 Octane, and all the temperatures will be cooler as ethanol burns cooler than unleaded fuels.
mind you that here in the U.S. we have winter blends that they switch when the times comes and it has a much different octane rating,lower I believe.Tuning for E-85 and romping on the car with winter blend can cause the same damage that using regular fuel can on an E-85 tune.
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Old 02-02-2011, 04:44 PM   #15
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Default Re: How much horsepower do you think a stock k20z3 can handle???

So what would be a good tranny to boost on the 5spd or 6 spd ?
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Old 02-03-2011, 05:57 AM   #16
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Default Re: How much horsepower do you think a stock k20z3 can handle???

I actually recommend going with some PPG gears cause all the stock gears tend to just do this

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Old 02-04-2011, 08:20 AM   #17
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Default Re: How much horsepower do you think a stock k20z3 can handle???

Who makes PPG gears? Are they stronger?
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Old 02-04-2011, 08:44 AM   #18
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Default Re: How much horsepower do you think a stock k20z3 can handle???

http://www.ppgearbox.com.au/page.asp...9&parent3id=33

They are a lot stronger since they are straight cut gears
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Old 02-04-2011, 02:23 PM   #19
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Default Re: How much horsepower do you think a stock k20z3 can handle???

wow how much does those gear sets cost?
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Old 02-04-2011, 02:41 PM   #20
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Default Re: How much horsepower do you think a stock k20z3 can handle???

a bit over 4g's
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