S2000 Under The Hood S2000 Technical and Mechanical discussions.

Head job Gains,A LOT,

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Old Jul 6, 2007 | 09:13 AM
  #1  
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Default Head job Gains,A LOT,

I need to be short and will let the dyno talk,
This a S2000 head job that i did with my Mechanic,Head has not been sent to A shop to be done just ported and highly polished Exhaust(probably the most gains) and little(probably none compared to exhaust) ported and satin polished intake runners.
Here is a NA compare between the two. RED line is WHP,yellow is Flywheel HP and the blue one is Torque...
thin line is head and thick is stock.
everything the same just the head job....
Enjoy
I will be out of town for few days so no answers to questions till than...
the gains are pure Head...


I say look at it better...
maybe 20-25whp gain at 6500rpm and definetly 20 and more at 8300rpm
definetly 15 whp gain at 5000rpm...

I wonder if the Intake manifold Runners that i polished at the same time had to do anything with this?

go here to see bigger pic ..and more
http://www.putfile.com/pic.php?img=5903360
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Old Jul 6, 2007 | 10:00 PM
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nice gains
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Old Jul 7, 2007 | 06:17 PM
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11whp is a serious gain even if you 'correct it' for variations between the runs.
nice info man - thanks.
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Old Jul 7, 2007 | 07:57 PM
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not bad for that work!!
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Old Jul 7, 2007 | 11:24 PM
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Nice work Do you plan on doing a 3 angle valve job and upgrade the valvetrain ?
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Old Jul 8, 2007 | 10:57 AM
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nope,Standard Valvetrain and i didnt touch the seats,they are OEM..Just took off the head,done the Head job and put it back again...you have to very careful when you work on it its,very,very easy to destroy the seats...
Anyway i was wondering how the WHP of the HEad job comes to be with the Flywheel HP of the standard head...
cheers.
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Old Jul 9, 2007 | 08:15 AM
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How much does something like this run? Those are really good gains
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Old Jul 9, 2007 | 09:55 AM
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Probably only the SAnd papers i bought for the Job i say maybe 40$ tops.
But no covering the Work on the head,and my mechanic is my friend and he only wanted to charge me for the Shortblock Swap...
Whats important is that my mechanic the one thats in the picture of my Sig had done this before,but not on a honda so he had expirience on it and if i did it i would surely damaged the valve seats...
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Old Jul 9, 2007 | 11:01 AM
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So you bought the grinding bits and your mechanic did the actual work for free? That's a damn fine exchange! $40 and a day's work for 11hp is quite nice, particularly on this car.
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Old Jul 9, 2007 | 11:24 AM
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I could use a good head job...
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