Evo Mild build confusion!
Thread Starter
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Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
Ok, thanks for the as I've guys.
So would this work?
Cylinders bored to 9.5 comp flat top pistons SE or Wiseco + .020" over
Stock heads, or possibly cc'd and milled to get compression to 9.5? Or should I deck the cylinder heads to zero deck height?
EV27 cam
Good exhsust and tune
So would this work?
Cylinders bored to 9.5 comp flat top pistons SE or Wiseco + .020" over
Stock heads, or possibly cc'd and milled to get compression to 9.5? Or should I deck the cylinder heads to zero deck height?
EV27 cam
Good exhsust and tune
Thread Starter
|
Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
Thanks guys,
Can anyone point me in the right direction for some 9.5 or 10.1 pistons that will give me an overall compression of 9.5 with stock heads and a ccp of around 180??
Also, how many cc's do the different high comp pistons have?? So I can use the big boys compression cam calculator.
Thanks
Can anyone point me in the right direction for some 9.5 or 10.1 pistons that will give me an overall compression of 9.5 with stock heads and a ccp of around 180??
Also, how many cc's do the different high comp pistons have?? So I can use the big boys compression cam calculator.
Thanks
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,809
Likes: 7,446
From: OH
Thanks guys,
Can anyone point me in the right direction for some 9.5 or 10.1 pistons that will give me an overall compression of 9.5 with stock heads and a ccp of around 180??
Also, how many cc's do the different high comp pistons have?? So I can use the big boys compression cam calculator.
Thanks
Can anyone point me in the right direction for some 9.5 or 10.1 pistons that will give me an overall compression of 9.5 with stock heads and a ccp of around 180??
Also, how many cc's do the different high comp pistons have?? So I can use the big boys compression cam calculator.
Thanks
p/n M5003 12cc 9.75-1 .005 overbore
p/n M5008 16.1cc 10.5-1 .005 overbore
C/R`s listed are NOMINAL figures
I`m sure other brands are similar, your preference, LOOK THEM UP and research
Last edited by eighteight; Mar 18, 2020 at 07:43 AM.
Thread Starter
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Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
[QUOTE=eighteight;18956279]Using CP Carillo pistons as an EXAMPLE
p/n M5003 12cc 9.75-1 .005 overbore
p/n M5008 16.1cc 10.5-1 .005 overbore
C/R`s listed are NOMINAL figures
I`m sure other brands are similar, your preference, LOOK THEM UP]
Thanks for all the helpful advice.
p/n M5003 12cc 9.75-1 .005 overbore
p/n M5008 16.1cc 10.5-1 .005 overbore
C/R`s listed are NOMINAL figures
I`m sure other brands are similar, your preference, LOOK THEM UP]
Thanks for all the helpful advice.
Last edited by Adam76; Mar 18, 2020 at 08:00 PM.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
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From: san antonio
Thread Starter
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Road Master
Joined: Apr 2017
Posts: 1,050
Likes: 92
From: out there
From everything I'm reading, headwork is a big part of where the power is made - but it's looking like that's not really possible for me to get locally, and would cost a bucket to send 3000 miles away to be done properly and sent back.
I'm looking for the best cam / piston / compression combo without needing any headwork porting polishing valve job etc
A simple shaving/milling to clean the surfaces or even a 50 thou milling of the heads may be possible from one of the local engine builders here if that's a good option?
Thanks for the help.
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Thanks djl.
From everything I'm reading, headwork is a big part of where the power is made - but it's looking like that's not really possible for me to get locally, and would cost a bucket to send 3000 miles away to be done properly and sent back.
I'm looking for the best cam / piston / compression combo without needing any headwork porting polishing valve job etc
A simple shaving/milling to clean the surfaces or even a 50 thou milling of the heads may be possible from one of the local engine builders here if that's a good option?
Thanks for the help.
From everything I'm reading, headwork is a big part of where the power is made - but it's looking like that's not really possible for me to get locally, and would cost a bucket to send 3000 miles away to be done properly and sent back.
I'm looking for the best cam / piston / compression combo without needing any headwork porting polishing valve job etc
A simple shaving/milling to clean the surfaces or even a 50 thou milling of the heads may be possible from one of the local engine builders here if that's a good option?
Thanks for the help.
Instead of milling heads, you might need to go the other way with domed pistons, leaving the heads alone except for new guide seals, multi angle valve job and general cleanup.
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Thread Starter
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Road Master
Joined: Apr 2017
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Likes: 92
From: out there
As for milling the heads, you just have to go to the Big Boyz compression calculator and put in the data and shoot for 9.6 corrected and 190-200 CCP. You might also consider the V&H FP3; several guys that lack access to a dyno tuner are going that route with decent results.
Instead of milling heads, you might need to go the other way with domed pistons, leaving the heads alone except for new guide seals, multi angle valve job and general cleanup.
Instead of milling heads, you might need to go the other way with domed pistons, leaving the heads alone except for new guide seals, multi angle valve job and general cleanup.
Cheers
Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
Get a Twinkie powertrain from a Twin Cam era Softail and swap it in. I did exactly this on my 1994 Road King, swapped in the powertrain from a 2000 RK Police. Fvck the Evo, it's an antiquated design.
