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09-16-2009, 04:49 PM
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#1 (permalink)
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Seasoned Rider
Join Date: Nov 2008
Location: pa
Posts: 52
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how many cubic inches????
i just recieved my th400-6 cams from bob woods for my 09 ultra, my heads are going to scott at hill side cycle for stg-3 work ,and woods springs, i was thinking about hillside boring cylinders to 107 cuin, but i am also thinking about 103 cuinch, is there that much power difference between the different sizes of cylinders? vs longevity???????
thanks
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09-16-2009, 05:06 PM
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#2 (permalink)
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mooooving out!
Join Date: Apr 2006
Location: so ca
Posts: 11,632
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Yes, they should be worth it, it doesn't cost much more, if any.
__________________
Quote:
43%er
Bi-polar and loving it!!
Bi-polar and hating it!!
95" w/ KB pistons (flattops)
HQ575 cams
Atwood's Road Warrior Heads
.030 head gasket
SuperTrapp Supermeg 2in1
"43" points cover
TRW rear mount
obligatory Baisley Spring
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I love my country, but I am scared of the goverment.
Just sayin..........
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09-16-2009, 05:09 PM
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#3 (permalink)
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XLIII
Join Date: Sep 2004
Location: West Central Indiana
Posts: 9,758
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Quote:
Originally Posted by TIMTOOLMAN
i just recieved my th400-6 cams from bob woods for my 09 ultra, my heads are going to scott at hill side cycle for stg-3 work ,and woods springs, i was thinking about hillside boring cylinders to 107 cuin, but i am also thinking about 103 cuinch, is there that much power difference between the different sizes of cylinders? vs longevity???????
thanks
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They're boring stock cylinders to 107?
__________________
Dave
I mock, therefore I am.
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09-16-2009, 05:47 PM
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#4 (permalink)
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Lifetime Premium
Join Date: Dec 2007
Location: Oklahoma
Posts: 224
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Bore them to 107".
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D&D Muffler Bearings
Andrews Piston Return Springs
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09-16-2009, 06:26 PM
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#5 (permalink)
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The story of my life!
Join Date: Oct 2005
Location: Oregon City, Oregon
Posts: 1,792
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You should have that decided before you have the heads done.
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09-16-2009, 07:16 PM
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#6 (permalink)
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Lifetime Premium
Join Date: Nov 2005
Location: alabama
Posts: 9,325
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 you are building backwards. scott wont know how to work the heads till you decide the cubic inch. makes one question how you decided the cams??????
__________________
truth and equality for all. this is still AMERICA!
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09-16-2009, 07:55 PM
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#7 (permalink)
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Lifetime Premium
Join Date: Mar 2005
Location: DeRidder, Louisiana
Posts: 71
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I run the 400-6 in my 103. Great cam. My heads are done, roller rockers, etc. Nice pulling power.
__________________
2008 FLHTC, 103"
114ft/lbs Torque, 118 Hp
Last edited by rgrgoog : 09-16-2009 at 07:58 PM.
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09-16-2009, 10:42 PM
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#8 (permalink)
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Seasoned Rider
Join Date: Nov 2008
Location: pa
Posts: 52
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well dont you do the heads according to the cam?? thats what bob woods and i talked about displacement isnt as important as the heads. pick a cam do the heads with the correct piston design. i.e. cast/forged/compression??? hmmmmm?????
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09-17-2009, 12:07 AM
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#9 (permalink)
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mooooving out!
Join Date: Apr 2006
Location: so ca
Posts: 11,632
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Displacement is not as important as the port on the heads, but the sizing of the combustion chamber does matter here.
Yes, the 107 size cylinders for a 96" engine is the same as the 98" bore for an 88" engine.
__________________
Quote:
43%er
Bi-polar and loving it!!
Bi-polar and hating it!!
95" w/ KB pistons (flattops)
HQ575 cams
Atwood's Road Warrior Heads
.030 head gasket
SuperTrapp Supermeg 2in1
"43" points cover
TRW rear mount
obligatory Baisley Spring
|
I love my country, but I am scared of the goverment.
Just sayin..........
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09-17-2009, 04:54 AM
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#10 (permalink)
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Premium Member
Join Date: Nov 2007
Location: Tn
Posts: 432
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Quote:
Originally Posted by route66paul
Displacement is not as important as the port on the heads, but the sizing of the combustion chamber does matter here.
Yes, the 107 size cylinders for a 96" engine is the same as the 98" bore for an 88" engine.
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that is correct.......but i would not use the same ports/valves or chamber on a 95 as a 117.. Scott needs to know 107 or 103 for setting up the pistons....
__________________
Broke Down Money Pit....
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09-17-2009, 10:26 AM
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#11 (permalink)
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Seasoned Rider
Join Date: Jul 2009
Location: Michigan
Posts: 56
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There's no replacement for displacement ;-)
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09-18-2009, 12:10 PM
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#12 (permalink)
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XLIII
Join Date: Sep 2004
Location: West Central Indiana
Posts: 9,758
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Quote:
Originally Posted by route66paul
Displacement is not as important as the port on the heads, but the sizing of the combustion chamber does matter here.
Yes, the 107 size cylinders for a 96" engine is the same as the 98" bore for an 88" engine.
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That workin' out any better than the 98 did on the 88s?
__________________
Dave
I mock, therefore I am.
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09-22-2009, 06:15 PM
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#13 (permalink)
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Premium Member
Join Date: Mar 2008
Location: New Bern NC
Posts: 395
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Quote:
Originally Posted by MegaGlide
That workin' out any better than the 98 did on the 88s?
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Nothing wrong with boring stock cylinders to 98".
PS go with the 107
__________________
Hillside 98" Small Bore Kit
Stage III Heads
Stock Throttle Body Bored to 46.5mm
Hillside Air Filter
Woods TW-6G cams
S&S Adjustable Pushrods
D&D Fatcat (standard baffle)
Barnett Clutch Spring
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