Considering S&S 100” sidewinder upgrade on 03 Ultra

[chas]

Last year i upgraded my 03 Ultra with the S&S 509 cams,plate,lifters, oil pump etc... Im happy with the results but, thinking the 100" upgrade would be the icing on the cake! What can I expect for torque increase, is it marginal or something I would feel in the lower rpms? Thanks in advance- Chas

[rigidthumper]

With the proper tune, (and any necessary upgrades) should see 12-15% increase across the board.

[Deye76]

Besides the added TQ, a 4"X4" 100" motor is very smooth.

[jsachs1]

No more bore left on the 4" cylinders. You may find they have a short service life. I've seen several sets come through the doors here, with not a lot of mileage. You may want to consider a 3.937" bore instead.
John

[calif phil]

Did one for a guy when they first became available.  He has 30k on it now. it's been a great runner.  Joe Lyon's did the break-in and tune. 

[boooby1744]

With that cam, I think just 95' SE flat tops would be the best bang for the buck. I don't know your mileage but maybe freshen up the heads.

[Adam76]

No more bore left on the 4" cylinders. You may find they have a short service life. I've seen several sets come through the doors here, with not a lot of mileage. You may want to consider a 3.937" bore instead.
John

John, for those guys doing 3.937" bore upgrades using their stock cylinders. What is your go to / most popular piston, cam and compression choice up for a good reliable power and most TQ 2000 - 5000.
I thought I'd ask, seems you have done a lot of these builds?
Thanks

[Don D]

Not him but KB714LCA pistons.

[jsachs1]

No more bore left on the 4" cylinders. You may find they have a short service life. I've seen several sets come through the doors here, with not a lot of mileage. You may want to consider a 3.937" bore instead.
John

John, for those guys doing 3.937" bore upgrades using their stock cylinders. What is your go to / most popular piston, cam and compression choice up for a good reliable power and most TQ 2000 - 5000.
I thought I'd ask, seems you have done a lot of these builds?
Thanks

Like Don said, I use KB 714LCA Line to Line coated forgings. Be sure to specify stroke being used. Piston forging diameter is stamped on the wrist pin boss of any of their Line to line coated pistons. Just add clearance to that.
John

[Adam76]

No more bore left on the 4" cylinders. You may find they have a short service life. I've seen several sets come through the doors here, with not a lot of mileage. You may want to consider a 3.937" bore instead.
John

John, for those guys doing 3.937" bore upgrades using their stock cylinders. What is your go to / most popular piston, cam and compression choice up for a good reliable power and most TQ 2000 - 5000.
I thought I'd ask, seems you have done a lot of these builds?
Thanks

Like Don said, I use KB 714LCA Line to Line coated forgings. Be sure to specify stroke being used. Piston forging diameter is stamped on the wrist pin boss of any of their Line to line coated pistons. Just add clearance to that.
John

No more bore left on the 4" cylinders. You may find they have a short service life. I've seen several sets come through the doors here, with not a lot of mileage. You may want to consider a 3.937" bore instead.
John

John, for those guys doing 3.937" bore upgrades using their stock cylinders. What is your go to / most popular piston, cam and compression choice up for a good reliable power and most TQ 2000 - 5000.
I thought I'd ask, seems you have done a lot of these builds?
Thanks

Like Don said, I use KB 714LCA Line to Line coated forgings. Be sure to specify stroke being used. Piston forging diameter is stamped on the wrist pin boss of any of their Line to line coated pistons. Just add clearance to that.
John

Thanks John.

When doing these builds, with this bore size, and this KB piston.  what is your cam of choice?
For 2000 - 5000rpm
Thanks.

Apologies for going off topic.

[Don D]

The KB piston will require a 4.375" stroke for 107".
There is no 98" equivalent 3.937" bore piston for the 4" stroke offered by KB. I have sold JE 98" pistons, and they have worked well. They have a 9.5:1 and a 10.5:1 version.

[Ohio HD]

Adam, another set of options to get to 98" (they round down to 97") is pistons from Wiseco. If a 95" will work for you, S&S (might be Wiseco or CP pistons) or KB 95" pistons. I assume the S&S would be easier to order from OZ?

Not enough difference from 95" to 98" unless you're chasing the last horsepower you can get. A good all around good running motor, the S&S 570's (3200-5700 rpm) are decent cams. You could also get the in Easy Start versions if you plan to run some compression.  If you want strictly low and midrange, the S&S 583's (1500–5000 rpm) fit that bill. They also require less compression.

WISECO


S&S Cycle


KB

[Adam76]

What did you end up choosing Chas?

[jsachs1]

S&S offers a 98" 3.937" by 4" stroke. CP piston kit. I built one like that last week for a customer.
John

[Ohio HD]

You're absolutely right John. I was trying to find them last night in the new August catalog, and didn't see them. Here are the part numbers. Thanks John.






 

[Mi Infidel]

New guy here. I see Fuel Moto is a site sponsor here. I just installed one of their 98" piston and cylinder kits on my 01 super glide. It's a very nice kit and a little less expensive than the S&S kit. It came with CP pistons. I did contact them a couple of times and they were very helpful.

[dakota224]

Do The Hippo Build, They run awesome for many miles.

[Don D]

KB pistons can be had with LCA option, any of them, when purchased from a WD. I would not touch a hypereutectic ^ when they have such good forged pistons. Set them up at .0025 and rock and roll. But they only have a .040 over 95" piston which is ~96"
Then there is Drag / JE pistons 98" 0910-5937
Would be my two choices.

[chas]

Hi Adam _ Im still leaning towards the 100" kit, I might cut my season short and start the tear down in Nov. I live in the northeast so I'm pretty much done by Xmas.

[Adam76]

Hi Adam _ Im still leaning towards the 100" kit, I might cut my season short and start the tear down in Nov. I live in the northeast so I'm pretty much done by Xmas.

Have you looked at the Fuel Moto 98" kit? if a true bolt together kit is what you are looking for. Better priced and would be my personal preference.

[chas]

I will give it a look

[JSD]

Chas. if you live in the US go the S&S 4"

[chas]

Have you done the 4"?

[JSD]

Yes S&S use CP pistons with the kit 85cc heads 10.5 comp

[Lone Ranger]

Last year i upgraded my 03 Ultra with the S&S 509 cams,plate,lifters, oil pump etc... Im happy with the results but, thinking the 100" upgrade would be the icing on the cake! What can I expect for torque increase, is it marginal or something I would feel in the lower rpms? Thanks in advance- Chas

Did you do the upgrade yourself or have it done? I'm trying to decide between 509 cams,plate,lifters, oil pump or just go right to 100" Power Package with 585 easy start cams. Parts are around $800 more, wonder what labor cost might be. I'm not capable of doing the work.

[JSD]

Pay the extra 

[chas]

I have not done the upgrade, but always thinking of doing it! I have the 509 cam, cam plate upgrade, larger oil pump, and hydraulic tensioners. You would be happy with the 100" kit and that cam. I'm happy with what I have, but just a little would almost max out my tc88! I think it would be worth it.