Yet another 80" build.
#1
Yet another 80" build.
So the motor is finally pulled down in my 86 heritage. And i feel like i will have a number of questions so i will start a build thread instead of posting 30 new threads.....
I have been researching all summer and here is my final plan. Im starting with a pretty much stock motor with about 25k miles on it.
- .010 over wiseco 10:1 pistons in my stock cylinders.
-have my stock heads freshened up and a set of s&s high lift springs installed.
-s&s 561 cam.
Upon assembly i will cc the heads and make sure my deck height is zero. And with a .030 head gasket i should be at my goal of 9.2:1 corrected compression ratio factoring in that particular cam grind.
I already have s&s lifters and pushrods, an Ultima ignition and dynatek coil, and it breathes through an s&s super e and v&h pro pipe.
This site has always been a huge help and i apreciate everyone's input.
I have been researching all summer and here is my final plan. Im starting with a pretty much stock motor with about 25k miles on it.
- .010 over wiseco 10:1 pistons in my stock cylinders.
-have my stock heads freshened up and a set of s&s high lift springs installed.
-s&s 561 cam.
Upon assembly i will cc the heads and make sure my deck height is zero. And with a .030 head gasket i should be at my goal of 9.2:1 corrected compression ratio factoring in that particular cam grind.
I already have s&s lifters and pushrods, an Ultima ignition and dynatek coil, and it breathes through an s&s super e and v&h pro pipe.
This site has always been a huge help and i apreciate everyone's input.
#2
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Everything sounds good except for the cam. The 561 cam is not a bolt in cam for the Evo 80 inch motor. A really good cam for exactly what you're doing would be the woods W6 Cam. It is a bolt in cam sometimes though you might have to clearance the case so be careful.
Ill be putting springs in the head so everything should be ok.
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Im currently rubning a bolt in s&s 508 cam but i am wanting so squeeze some more out of my 80 incher without tearing into the bottom end and go with a stroker or big bore.
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#9
It appears you have a Hitachi starter. I'm pretty sure you can find high-torque Hitachi starters out there. I have a 77 shovel where it cranks slow at 9 to 1 compression. I put in a 1.6 kilowatt starter aftermarket Hitachi and it cranks over so nice it's unbelievable. On the other hand compression releases never hurt, done right it's like $150 option. If you getting head work done not a bad idea to get that done as well it'll save on future builds. I can remember when I had a 10:1 woods w6 stage II heads build in my Evo. Sometimes hot it had a little bit of hard crank the first Revolution but that was it, never caused any problems not to start and didn't have excessive wear and tear on the starter system. A 300 or 320 CCP battery is also a nice upgrade to have... Interstate makes a good 320 battery....
#10
It appears you have a Hitachi starter. I'm pretty sure you can find high-torque Hitachi starters out there. I have a 77 shovel where it cranks slow at 9 to 1 compression. I put in a 1.6 kilowatt starter aftermarket Hitachi and it cranks over so nice it's unbelievable. On the other hand compression releases never hurt, done right it's like $150 option. If you getting head work done not a bad idea to get that done as well it'll save on future builds. I can remember when I had a 10:1 woods w6 stage II heads build in my Evo. Sometimes hot it had a little bit of hard crank the first Revolution but that was it, never caused any problems not to start and didn't have excessive wear and tear on the starter system. A 300 or 320 CCP battery is also a nice upgrade to have... Interstate makes a good 320 battery....
I guess I rather give my machine shop a little more money than cuss and swear putting a starter in my bike. Ive had it out once and don't look forward to doing it again.
And when you say "future builds" you mean this engine building thing isnt a once and done thing??