1996 EVO Upgrade
Road Master
Joined: Feb 2014
Posts: 913
Likes: 5
From: indiana
go 10.5 wiseco there not really 10.5 in a totally stock motor with a ev27 there actually 9.6 .035 head gasket takes it to 9.8 and 77cc heads will put you at 10.5
Banned
Joined: Apr 2014
Posts: 678
Likes: 1
From: LA
77cc heads being, what, a .050" skim ... depending on how your head guy relieves the casting around the valves seats you might be able to afford more.
I had quite a lot taken off and some flame paths cut in, so I expect if you head guy does not, you'll need less of a skim though anything for 50 to 80 thou is a bit of a standard.
It makes a difference but how much more I can't say.
Hillside will chime in any minute & recommend a Woods 6 cam ...
Road Master
Joined: Feb 2014
Posts: 913
Likes: 5
From: indiana
True-true ...
77cc heads being, what, a .050" skim ... depending on how your head guy relieves the casting around the valves seats you might be able to afford more.
I had quite a lot taken off and some flame paths cut in, so I expect if you head guy does not, you'll need less of a skim though anything for 50 to 80 thou is a bit of a standard.
It makes a difference but how much more I can't say.
Hillside will chime in any minute & recommend a Woods 6 cam ...
77cc heads being, what, a .050" skim ... depending on how your head guy relieves the casting around the valves seats you might be able to afford more.
I had quite a lot taken off and some flame paths cut in, so I expect if you head guy does not, you'll need less of a skim though anything for 50 to 80 thou is a bit of a standard.
It makes a difference but how much more I can't say.
Hillside will chime in any minute & recommend a Woods 6 cam ...
.050 is way to much closer to .020 for 6cc
and don't just shave the heads have them cc'd
the set I just got back were stock took them to 72cc .041 off the front .034 off the rear. now they match
Novice
Joined: Feb 2008
Posts: 15
Likes: 0
From: Miami, Florida
Here is an update to my last post. I finished with the break-in period of the Revolution Performance 85 inch kit. The engine runs smooth and I can feel a bit more power overall. Also, the S&S carb makes a big difference over the CV carb. Very happy that I had this upgrade installed.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,093
Likes: 7,622
From: Poolville
85"er
Glad to hear it's complete. Do you have more info as to whats inside it , cam, heads, pistons etc. Do you have any dyno numbers? Pics would be nice too.....
Here is an update to my last post. I finished with the break-in period of the Revolution Performance 85 inch kit. The engine runs smooth and I can feel a bit more power overall. Also, the S&S carb makes a big difference over the CV carb. Very happy that I had this upgrade installed.
Last edited by 98hotrodfatboy; Jan 20, 2015 at 08:08 PM.
Novice
Joined: Feb 2008
Posts: 15
Likes: 0
From: Miami, Florida
No dyno numbers yet. I will post pictures soon.
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Stellar HDF Member
Joined: Jul 2011
Posts: 2,583
Likes: 115
From: Boston, MA
All of that effort on a "N- grind"? Were the base gaskets in good enough shape to re-use?
Seems almost like a step was skipped. But wtf do I know... some pics would be cool, Joe.
Thanks,
Tom
Seems almost like a step was skipped. But wtf do I know... some pics would be cool, Joe.
Thanks,
Tom
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Wood 8
Our Stage II heads
Wiseco pistons
Mik, or S&S E
Supertrapp, T/header, Cycle Shack M pipes
Dyna ignition
93-95 hp and 93-95 ft/lbs, minimum, and have witnessed 100/100.
We've built that combo here now for almost 20 years.
Scott
Our Stage II heads
Wiseco pistons
Mik, or S&S E
Supertrapp, T/header, Cycle Shack M pipes
Dyna ignition
93-95 hp and 93-95 ft/lbs, minimum, and have witnessed 100/100.
We've built that combo here now for almost 20 years.
Scott