I'm converting my '04 RK Custom FLHRSI, 95" big bore, SE 203,stock heads, to hydraulic cam chain tensioners. Using Andrews camshaft conversion. Will the 48N camshafts have to much lift (.548)? And stay with the 26N (.490 lift)

 

If you are still running the stock 04 heads and valve spring pack you will not have enough retainer to guide clearance for the lift of the 48 cams. Doubt you would gain anything from the added lift on the older heads anyway.

 

The 2004 springs will handle up to .510" lift.
Set the compression at 9.65, and use the 26's, if the heads will not be removed.
IF the heads were to be removed to allow the use of a larger lift cam, and ported, that opens the door for many other options/power.
Scott

 

Maybe I'm confused but how can you set compression without pulling heads? If all he's doing is a cam change, isn't he stuck with the compression ratio from the original 95" build?

I'm a car guy so feel free to correct me if there's something different on these that I'm missing.

 

In my 05 I used the 48 cam when upgrading the cam plate.They changed the valve springs starting in 05 to allow higher lift cams. Except for a stage 1 and a pc3 tuner there is no other performance work done on the bike.......I can tell you this...it is a totally different bike after the cam change..I have no regrets

 

I was considering a .030 head gasket. What valve set up would be recommended for the high lift cam? At this point I'm leaning towards the 26N with .030 head gasket & maybe a mild port. I didn't want to get this to costly.
I'm mainly looking to get away from the spring tensioners & not to downgrade from the SE 203 currently in the bike.

 

Feel free to contact us.

 

Does anyone have some experience with a 26N set up like this? Equal or better than a SE 203 (hp & tq)

 

Honestly I feel it is a wash, the 203 is not a bad cam at all and very comparable on the dyno to an andrews 26 in an application that you are describing. If you are doing the swap solely for the reason of going to the hydraulic tensioners then you are just replacing a wear item with another (slightly better) wear item.

 

How about the S&S 509? It will work with the '04 heads, earlier intake close for a bit more compression and you will feel the difference over the 203s. I agree with BVBOB and would not change cams from the SE203 to the Andrews 26; pretty much the same and doubt that you would notice much difference.