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[skyhook]

i did something similar...put ported 96" heads on my 110" for the same reasons as you stated

[HD Street Performance]

Just got a report back from a guy that I did the 103 heads for, just a street port with flow work and he made 109 and 121 with a pancake torque curve. Still not condemning the OEM head but this one had SE103 heads and a Wood TW408-44 and stock 103" cylinders SE HC pistons

edit:
Made a mistake this one was stock bore and SE HC pistons, been real busy with several of these

[Tom149]

Just got a report back from a guy that I did the 103 heads for, just a street port with flow work and he made 109 and 121 with a pancake torque curve. Still not condeming the OEM head but this one had SE103 heads and a Wood TW408-44 and Axtell 107" stock bored barrels. 10/1.

 
Great Numbers ..... Don, do you know what exhaust he is using?

Tom

[HILLSIDECYCLE.COM]

Tom149,

The only thing I am curious on is the thickness of the spigots and the worry of cracking using a stock cylinder bored out that extra bit to go from 103 to 107.  Yes I know there are some out there and it is becoming more and more popular and that some say it is fine, but was told of one the other day that was .032 thickness and had cracked.   I don't know if this is a one off issue or whether it would be common, guess time will tell.

I have not tried to find the information yet, but wondering what Axtell's thickness  for their 107 cylinders vs. cut stock 96 or 103 cylinders.

We have been boring those since early 2007. 88-98", 96-107", with our private label Wiseco kits. NOT 1 problem.
Only at clients request do we bore to the 95", or the 103".
The .032" info is totally wrong. .060" if not mistaken, and there is not load in that area anyway.
BTW, we bore the 124" S&S's to 128.5" as well, and it maintains the clamping force that the 131" do not have, causing the inherent leaks on those.
Scott

[Tom149]

We have been boring those since early 2007. 88-98", 96-107", with our private label Wiseco kits. NOT 1 problem.
Only at clients request do we bore to the 95", or the 103".
The .032" info is totally wrong. .060" if not mistaken, and there is not load in that area anyway.
BTW, we bore the 124" S&S's to 128.5" as well, and it maintains the clamping force that the 131" do not have, causing the inherent leaks on those.
Scott

Scott,

Great information, makes me feel alot better!

Tom

[mcdonaldroadcapt]

Tom,

My CVO is triked out and I would like to move the torque down lower for the additional weight. Where can I obtain the Rinehart quiet baffles for $94.00?   Keep seeing $124.00 for True Duals,


Jim

[Tom149]

Tom,

My CVO is triked out and I would like to move the torque down lower for the additional weight. Where can I obtain the Rinehart quiet baffles for $94.00?   Keep seeing $124.00 for True Duals,


Jim

Jim,

Here ya go:

http://www.denniskirk.com/jsp/product_catalog/Product.jsp;jsessionid=UKLZSQ2RHWHIBLA0WTKSM4VMDK0NCIV0?skuId=4401995&store=Main&catId=&productId=p4401995&leafCatId=&mmyId=

Tom

[Unbalanced]

We have been boring those since early 2007. 88-98", 96-107", with our private label Wiseco kits. NOT 1 problem.
Only at clients request do we bore to the 95", or the 103".
The .032" info is totally wrong. .060" if not mistaken, and there is not load in that area anyway.
BTW, we bore the 124" S&S's to 128.5" as well, and it maintains the clamping force that the 131" do not have, causing the inherent leaks on those.
Scott

Scott,  Is that .060 your number (Hillside's value / spec) or Axtell's number or someone elses number?   

[Tom149]

i did something similar...put ported 96" heads on my 110" for the same reasons as you stated

Skyhook,

I am very satisfied with the head swap and I hear those 96" castings are a real good starting point as well!

Tom

[HD Street Performance]

Great Numbers ..... Don, do you know what exhaust he is using?

Tom

Here is the dyno. He used V&H Big Radius. Not a real strong performer. There is more in there, but rather than focussing on the numbers notice the torque curve even with that sketchy pipe.

I am beginning to grow fonder of the TW408-44 and would really like to use it with high ratio rockers, bypassing the TW7, so the TW5-6 as a torque monster and then the TW408-44 or the TW8-6 for somebody that wants some more punch but still very good low end torque.

[skyhook]

yeah it works great...just got back from a backroad blast and it's amazing how quick it hits the rev limiter in 1st and 2nd gear!

[Tom149]

Here is the dyno. He used V&H Big Radius. Not a real strong performer. There is more in there, but rather than focussing on the numbers notice the torque curve even with that sketchy pipe.

I am beginning to grow fonder of the TW408-44 and would really like to use it with high ratio rockers, bypassing the TW7, so the TW5-6 as a torque monster and then the TW408-44 or the TW8-6 for somebody that wants some more punch but still very good low end torque.

Don,

Now that curve is impressive especially with that pipe, and I like your cam plan. I'd be interested to see what the TW408-44 with high ratio rockers or maybe a +4 would do. I almost went with the TW-5-6-R with my build, but chose the Andrews 54N's instead.

Tom

[HD Street Performance]

Scott,  Is that .060 your number (Hillside's value / spec) or Axtell's number or someone elses number?   

Not either of their numbers just the math  
stock bore =3.750 spigot wall thickness =.153
3.938" Wiseco piston bore = .188 OS or .094 removed per side = .059 spigot
3.932 Axtell / Wossner piston bore = .182 OS or .091 removed per side = .062" spigot

[Unbalanced]

Tom149,

I wouldnt jump so fast into believing what you see there on that dyno sheet.  When you see the same bike run on a dyno that does their print outs in SAE / STD and prints the conditions then I would say you have a better basis to judge.

[Tom149]

Tom149,

I wouldnt jump so fast into believing what you see there on that dyno sheet.  When you see the same bike run on a dyno that does their print outs in SAE / STD and prints the conditions then I would say you have a better basis to judge.

I agree unbalanced, but shouldn't the shape of the curve remain?

Tom