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[bbsiding]

I have a 117 drop in kit I have not yet installed in my FLHTCUSE6   I am thinking I need to use the S&S premium lifters and a different cam to do better than the "standard" kit   Looking at the GMR 600 or the T-man 600 which need more compression than the 9.9 the kit offers  Can I effectively raise compression with a thinner head gasket and what thicknesses are available and from where or who do I acquire them if they would in fact raise the compression ratio to a suitable level for the respective cam    I have Bub7 head pipe and CFR (I know) mufflers and have purchased a power vision with auto tune from fuel Moto    Any help from the gurus here would be greatly appreciated

[coloradotom]

They will but you need to know the existing size of the combustion chamber to know by how much. It won't be a lot. If you need more you can also see if milling your heads a bit would work.

[Para Bellum]

You can go with Tom's suggestion above for decking the heads, or see http://www.cvoharley.com/smf/index.php?topic=107876.0 for one source of higher compression pistons for the 117 kit.

Tom is correct that the gasket by itself won't add much; it's only worth 0.1 or so.  OTOH, you might look again at the results guys are getting with the 259 cam in this kit---all of them are getting good results with better TQ at low RPM than the 255.  It's possible the 259 hit a sweet spot in this kit with 9.9:1 CR, which is about 0.7 higher than stock.

Check reply #4 in this thread http://www.cvoharley.com/smf/index.php?topic=107834.0 and reply #612 here http://www.cvoharley.com/smf/index.php?topic=105913.msg1371303#msg1371303 and #316 here [url}http://www.cvoharley.com/smf/index.php?topic=105913.315[/url] for 259 cams.

See reply #14 in http://www.cvoharley.com/smf/index.php?topic=107834.0 for the S&S 570G cam results.

[CVODON]

Seems to me if you didn't intend to use the cams, why did you buy a kit with them? Why not just buy the parts from the kit that you actually wanted. Same for anything else, you know the parts guy can break apart part # of the kit and order whatever from it that you want, you do not have to buy it all together.

[cvo1717]

I decked my heads to 90 cc aprox 10:5:1 and used wood tw-8 cam ,bike has gobs of tq all over

[RoadDawg]

Guess it depends on what you're after. The kit, as is, produces great tq down low. Horsepower seems never ending.

[prodrag1320]

kinda seems like you have no real plan for your build.a sure way to end up with something your not going to like (or just flat out runs like crap) pick cams & compression to go with the 117" cylinder kit that will compliment each other & give power where you want it.give us a idea of what your looking for & we can help with the parts needed

[HD Street Performance]

Using the 259E optimized is 10.9:1. TR600 10.0:1, GMR 600 ~10.7:1

So gasket will raise this combo from a theoretical 9.9:1 with the supplied .040hg to 10.1:1.

Assumptions which could be quite far from truth:
*  chamber volume 96cc
*  pistons .004 down in the hole

If you want a great torque curve the pipe and proper tune will have more influence on the outcome

[dnlpnd]

I have a 117 drop in kit I have not yet installed in my FLHTCUSE6   I am thinking I need to use the S&S premium lifters and a different cam to do better than the "standard" kit   Looking at the GMR 600 or the T-man 600 which need more compression than the 9.9 the kit offers  Can I effectively raise compression with a thinner head gasket and what thicknesses are available and from where or who do I acquire them if they would in fact raise the compression ratio to a suitable level for the respective cam    I have Bub7 head pipe and CFR (I know) mufflers and have purchased a power vision with auto tune from fuel Moto    Any help from the gurus here would be greatly appreciated

The Cometic 0.030 head gasket will take your 9.9:1 to 10.1:1 on a 117 kit.  Not enough for cams you're talking about.  In addition to a thinner head gasket you're going to need some head milling or domed pistons.  I know Ward's Performance decked and CNC ported at least two (and probably three) of the "special" 117 builds on this forum.  Plus, your stock valve springs are only good to ~.575 lift cams.

dnlpnd