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Discussion Starter · #1 · (Edited)
After a year of wait... I finally got it in hand. This one is 105mm, I didn't feel it was necessary to go all the way to 108mm yet. All I have left is to put it on the bench drill and knock out the water passage holes.

 

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Nice :tup: Who did the work?
 

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Looks good, can't wait to see some numbers on this build!
 

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Discussion Starter · #7 ·
As you can see in the pic there is one area we couldn't fill, It's not going to compromise any strength or affect the head gasket seal. The gasket and head both cover it.

Traitor, It comes out to 727. Stock bore is actually 686cc, 41cc gain.

RednBlack, It'll be the strongest part on the bike. It started out as a solid 5/8" thick walled sleeve.



 

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Discussion Starter · #9 ·
Smooth are you gonna use a XR or XX head on that build?
Depends. If funds permit I'm considering a turbo setup and will use the XX head due to the ease of a single port. If I can't swing the turbo setup I'll use an XR in hopes that it makes more power with the dual Exh ports.
There's still two other items I've got to finish before I get to the head options so I got plenty of time to decide. I've actually got two XR heads, I'm going to port one myself and prolly sell the other if anyone is interested.
 

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Discussion Starter · #11 ·
What needs to be done to fit xr head?
The biggest issue is the oil circuit to the top of the head. Nothing huge but more of a thorn. The motor mount support that is missing on the XR head is debatable. I'd feel comfortable running without it.
 

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where will you be purchasing the turbo setup from? english racing?
 

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Discussion Starter · #13 ·
Put one together for a 1/3 of the price they charge for one.
 

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Put one together for a 1/3 of the price they charge for one.
Can't wait to see how this goes. I know in the raptor world the closer your bike is to stock the better for a turbo setup, hopefully you’ll be able to get it all dialed in with all your mods.
 

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I'd like to see this thing run with a turbo as well
You can run a turbo on a modded bike but it needs to be standard compression pistons
 

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I'd like to see this thing run with a turbo as well
You can run a turbo on a modded bike but it needs to be standard compression pistons
I was told cam and head work would need to be different on a turbo setup as well.
 

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Discussion Starter · #18 ·
08700X - Turbo's are very versatile. They can perform well on everything from stock to fully modded bikes. I'm not sure who told you about them working best on stock raptors but but that's not correct.
Regarding your second post- There are special Turbo cams but you really want see much benefit from them except on a full blown race motor and then it would put your power range way up top losing most all your bottom end power. As far as the head work there really isn't any special turbo porting. Having a good port job will help you spool faster, but it wont really effect peak HP.

Ranger - You can run turbo on any compression as long as you have the correct octane to support it. Lower compression will give you slower spool up but higher peak HP. Higher compression will give you a flatter power band, killer TQ and faster spool up. If I would turbo it I'd prolly run 9-10:1 compression and just 4-6psi boost.

Thank ya DL
 
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