103 Big Bore Kit

Hobbit · Nov 2nd, 2009, 12:21 AM

the dyno tune real matches the engine work to the intake and exhaust and gets alot of engine variable sorted a proper tune will gain you anywhere between 5-10 hp and tq but really depends on the operator, the SE maps are a good base line and will work straight out the box but as every bike is different they will require tweaks to get it spot on.
if you wish to contribute thankyou very much - if you click on the DONATE tab in yellow at the top of the screen

Neilwillo · Nov 2nd, 2009, 03:20 AM

Quote:

Originally Posted by Hobbit

mine is being killed by the EPA 255cams and SERT as we could not get it to run at the correct AFR was running in the 11 and 12's ie rich and at 100% throttle was 10.3 !!!!!! wasting fuel, we tried the VE tables the AFR the Bias and nothing seemed to affect it, if we could get better cylinder fill i would have a 120+tq monster but the cams does not have enough lift to get the air
but its still running 91hp and 111tq in comparison a 96 stg1 was over 30ft/lbs down and 20hp down and the 103 STG2 2008 bob did with a PCIII and no heads was 10hp and 20ftlbs down on the same dyno and the biggest shock the a destroyer Vrod was down on Torque but obliterated all commers on the HP stages 145hp and still climbing but it ran out of RPMS

Hobbit,
I was thinking about doing the same swap and I'm intrigued by your experiences. Previously you have proposed that the way to go was the HD 103 kit. I was in full agreement with you till I read your post above. I always knew the SE255 cams were EPA compliant but I figured they would be a good cam to give me a lot of torque with or without the 103 kit.

If the 255 cams are not the best what would you suggest? Some people put 211s in 96ci and others put the 203 cams for torque. Seems everyone has their own stories, likes and dislikes. You, on the other hand support your views with figures.

I'm after torque and early in the rev range. I want more roll on when passing cars or touring loaded on the 09 FLHT.

Thank you

Neil

Drumrguy · Nov 2nd, 2009, 07:17 PM

I don't care what anybody says but in my honest opinion if you are doing extensive motor work, they only way to get a good tune and all the power you can out of that motor it has to go on the dyno.

Hobbit · Nov 2nd, 2009, 07:23 PM

Quote:

Originally Posted by Neilwillo

Hobbit,
I was thinking about doing the same swap and I'm intrigued by your experiences. Previously you have proposed that the way to go was the HD 103 kit. I was in full agreement with you till I read your post above. I always knew the SE255 cams were EPA compliant but I figured they would be a good cam to give me a lot of torque with or without the 103 kit.

If the 255 cams are not the best what would you suggest? Some people put 211s in 96ci and others put the 203 cams for torque. Seems everyone has their own stories, likes and dislikes. You, on the other hand support your views with figures.

I'm after torque and early in the rev range. I want more roll on when passing cars or touring loaded on the 09 FLHT.

Thank you

Neil

Neil
remember my Dyna is a lot lighter than the tourers and that i have done head work as well to increase compression - this is were the 255 cam struggles, i really need a more agressive cam profile to open the valves further and longer.
if you fit the 103 with the stock heads and 255 cam you will see 90hp and around 100ft/lbs on the dyno and trust me when i say you will feel this, the roll on will be perfect and instead of dropping down a cog you will just wind it open specially as the 09's have a more low end oreinted gear box it will fl, how do i know our dealer has a street glide equiped so and it absoluelty rocks runs out of legs above 5500 rpms but then its a 1 tonne bike and its not made for it.
The spec on the street glide - monster ovals, SE heavy breather, SE 103 kit with 255 cam and se tuner - stock heads and throttle body.

jdaws · Nov 2nd, 2009, 08:35 PM

If we are going to build an engine up to 90+ hp, should we be geting the crankshaft trued, welded and better bearings installed? Or at what point do we do this? I would hate to spend 2k or more on power upgrades and see the low end give out.

Hobbit · Nov 2nd, 2009, 08:37 PM

the 09 crank is a better crank than the 08's that had the issue from what i was told by the dealer the new 96's ie 09/10's had the SE crank installed in them from factory and has better bearings, i know after the beating i give mine ther appears to be no run out or issue with it twisting

glens · Nov 2nd, 2009, 08:54 PM

There are two SE "stroker" cranks which have the same stroke as that of the stock 96" engine. One is the crank which is used stock in the 96" and it's built from cast wheels. The other, very more expensive one, has forged wheels. It's the cast wheels which have a harder time holding onto the crankpin.

I don't believe the current cast-wheeled crank is any different than anything that's been put into the 96" (A) engines all along.

bigcletus · Nov 6th, 2009, 08:24 PM

I have an 07 RG. I've put V&H True Duals, a Fuel Pak, Ness Big Sucker on it. I'm thinking of getting the engine upgraded to either a 103 or 110. What would the parts required? How much $$ would I be looking at for the parts??
And would I still use the above add-ons that I have now ??
Thanks

Neilwillo · Nov 19th, 2009, 10:51 PM

Quote:

Originally Posted by Hobbit

Neil
remember my Dyna is a lot lighter than the tourers and that i have done head work as well to increase compression - this is were the 255 cam struggles, i really need a more agressive cam profile to open the valves further and longer.
if you fit the 103 with the stock heads and 255 cam you will see 90hp and around 100ft/lbs on the dyno and trust me when i say you will feel this, the roll on will be perfect and instead of dropping down a cog you will just wind it open specially as the 09's have a more low end oreinted gear box it will fl, how do i know our dealer has a street glide equiped so and it absoluelty rocks runs out of legs above 5500 rpms but then its a 1 tonne bike and its not made for it.
The spec on the street glide - monster ovals, SE heavy breather, SE 103 kit with 255 cam and se tuner - stock heads and throttle body.

Thanks Hobbit. I don't see the high revs as I like to ride and in NSW if you are 30k over the speed limit they take your licence straight off you and charge you over $1000 for the privelage.

Neil

Nov 2nd, 2009, 12:21 AM	#21
Hobbit Moderators Ride: 2009 FAST 103 Street Bob Join Date: May 18th, 2007 Location: The Shires UK Posts: 7,625 My Mood:	Re: 103 Big Bore Kit the dyno tune real matches the engine work to the intake and exhaust and gets alot of engine variable sorted a proper tune will gain you anywhere between 5-10 hp and tq but really depends on the operator, the SE maps are a good base line and will work straight out the box but as every bike is different they will require tweaks to get it spot on. if you wish to contribute thankyou very much - if you click on the DONATE tab in yellow at the top of the screen __________________ Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< click me!

Nov 2nd, 2009, 07:17 PM	#23
Drumrguy Play The Throttle Ride: 2005 Ultra Classic Join Date: Oct 17th, 2009 Location: Oakdale, Pa. Posts: 261 My Mood:	Re: 103 Big Bore Kit I don't care what anybody says but in my honest opinion if you are doing extensive motor work, they only way to get a good tune and all the power you can out of that motor it has to go on the dyno.

Nov 2nd, 2009, 08:35 PM	#25
jdaws Warming The Wheels Ride: 2008 105 anv. FXDL Join Date: Jan 9th, 2009 Location: fargo, nd Posts: 66 My Mood:	Re: 103 Big Bore Kit If we are going to build an engine up to 90+ hp, should we be geting the crankshaft trued, welded and better bearings installed? Or at what point do we do this? I would hate to spend 2k or more on power upgrades and see the low end give out.

Nov 2nd, 2009, 08:37 PM	#26
Hobbit Moderators Ride: 2009 FAST 103 Street Bob Join Date: May 18th, 2007 Location: The Shires UK Posts: 7,625 My Mood:	Re: 103 Big Bore Kit the 09 crank is a better crank than the 08's that had the issue from what i was told by the dealer the new 96's ie 09/10's had the SE crank installed in them from factory and has better bearings, i know after the beating i give mine ther appears to be no run out or issue with it twisting __________________ Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< click me!

Nov 2nd, 2009, 08:54 PM	#27
glens Banned Ride: 09FLHTCU Join Date: Oct 6th, 2009 Posts: 97	Re: 103 Big Bore Kit There are two SE "stroker" cranks which have the same stroke as that of the stock 96" engine. One is the crank which is used stock in the 96" and it's built from cast wheels. The other, very more expensive one, has forged wheels. It's the cast wheels which have a harder time holding onto the crankpin. I don't believe the current cast-wheeled crank is any different than anything that's been put into the 96" (A) engines all along.

Nov 6th, 2009, 08:24 PM	#28
bigcletus Warming The Wheels Ride: 2007 Road Glide FLTR Join Date: Jan 6th, 2009 Posts: 50 My Mood:	Re: 103 Big Bore Kit I have an 07 RG. I've put V&H True Duals, a Fuel Pak, Ness Big Sucker on it. I'm thinking of getting the engine upgraded to either a 103 or 110. What would the parts required? How much $$ would I be looking at for the parts?? And would I still use the above add-ons that I have now ?? Thanks

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103 Big Bore Kit

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