G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile

Buell Forum » Old School Buell » Archive through January 10, 2015 » Xb9 pistons in s1 ? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Tony87
Posted on Wednesday, December 03, 2014 - 05:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hi!

It is winter in Norway and i am doing some work on my buell s1 lightning 1998.

Is it possible to run xb9 pistons in the s1 to Get some higher compression? And will it gain more hp?
Top of pagePrevious messageNext messageBottom of page Link to this message

Phelan
Posted on Wednesday, December 03, 2014 - 05:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Because of the dome in the center of the XB9 pistons, you would have to use the XB heads as well (or '04-up XL1200 heads), but you would be looking at 12:1 compression, which is really too high for even 91 Octane fuel.
Top of pagePrevious messageNext messageBottom of page Link to this message

Tony87
Posted on Wednesday, December 03, 2014 - 06:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

We got 98 octane in Norway. but the "dome" in the xb9 pistons do not fit / clearance in stock s1 lightning heads? Thats why i have to use xb heads?
Top of pagePrevious messageNext messageBottom of page Link to this message

Phelan
Posted on Wednesday, December 03, 2014 - 09:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Correct. The dome is high and in the shape of the bathtub of the XB heads. Even if you ground out material to make clearance for them in the lightning or T storm heads (whichever you have), both have a 15* squish cast in them that would collect fuel cut off from the flame front, and it would cause hot spots on the piston when those areas do ignite, eventually causing piston melting.
Top of pagePrevious messageNext messageBottom of page Link to this message

Tony87
Posted on Wednesday, December 03, 2014 - 09:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

OK

Thnx
Top of pagePrevious messageNext messageBottom of page Link to this message

Dannybuell
Posted on Wednesday, December 03, 2014 - 09:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I understood that the lightning heads used flat top pistons, like the xb. the domed pistons are the thunderstorm heads.
Top of pagePrevious messageNext messageBottom of page Link to this message

Phelan
Posted on Wednesday, December 03, 2014 - 06:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Motors with Lightning heads did use flat top pistons but the heads have a cast squish band in them. Same heads as the '98-'03 XL1200S and pre-'04 Screamin Eagle heads, though the 1200S and SE variants are dual plugged.
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a private posting area. Only registered users and custodians may post messages here.
Password:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration