My 2007 Roadglide has a high flow air cleaner, 103+ big bore kit, screaming eagle pro 103+ cylinder heads, SE 255 cams,forged pistons, which gives it 10:5 to 1 compression ratio and a D&D fat cat.

I have been doing some research and it looks like the SE-257 or SE-258 camsmight be a better match up with the the 103 + kit pistons and heads vs theSE-255 cams. Any ideas??

 

The 255 cams are the softer of their lineup and are used a lot with the 103 kit where people want to have some performance while keeping the bike within warranty coverage. I say that as HD offers warranty to anyone who installs their 103 kit as they have designed it, and it uses the 255 cams. If your go to custom exhaust, change cams or any other parts, you'll like disgard the warranty offered through the MOCO on drive related parts with perhaps the exception of the dealer who does the install for you. They might warranty the stuff if they sold it and installed it, but likely not for the full two years of the original warranty. I like the Red Shift or Andrews Cams over the SE line.

 

I have a 103 in my 03 standard with regular htcc heads, htcc pistons, se 257 cams, and a D&D fatcat exhaust and it runs strong making 112 hp 119.9 tq so i like the 257 cams. I agree the cams in the kit are are not for the most performance.

 

my buddy has the 257 in a 95" big bore kit from his 88
along with ported CNC heads and 10.5-1 pistons.
he pops out about 100 HP and TQ it runs really good.
i have a 103 with ported CNC heads and 10.5-1 pistons and i think too much cam with the 260, i have not had dynoed as of yet. he kicks me off the line but hold on when it hits 3 grand.
because of the lack of torque i am going to try a woods TG-400-6 cam .650 lift.
but for a SE cam that 257 cam is a great one.

 

I ordered the SE-258 cams based on the HD SE information in the catalog. The cams have been designed for use in high compression larger displacement applications.Peak power in the higher rpm range yet still pulls good in the lower ranges. Works well in conjuction with forged pistons,performance heads and open intake and exhaust.



[IMG]local://upfiles/30444/99EB7BF547F64B17B4E798C72CB58E95.jpg[/IMG]

 

truegentleman
I have just built a 103 with the CNC ported heads and the Woods 400-6 cam, lots of low end grunt, no pinging with a proper tune. The cam is great, you will definitely like it.
Are you running stock injectors, HD dropped the flow to 3.9gm/sec from4.22 in the 06's and earlier. I went with a reworked HD throttle body, 50mm and installed the screaming eagle injectors, that have a 4.89gm/sec flow. You will get all kinds of issues with tuning with the stock injectors because to flow enough fuel, the duty cycle gets up around 80% causing injectors to continue to pour fuel into the manifoldedand flooding of the throttle body which will result in alternating rich/lean mixtures entering the cylinders.

 

that is good info to know Dalton.
i appreciate the injector info especially.
i will be running the stock throttle body, will i still need the larger injectors , is that something that harley sells?

 

How would this camwork with stock heads and the 103 big bore kit.

 

Dalton makes a great point.....

There are many better options for cams than the S/E ones originally mentioned (HQ, Woods, Andrews, etc...). However, regardless of which cam is selected.... the tune will make or break the build.

 

Assuming you have a good tune. My question is in going to the SE 103 kit will the compression be high enough to use the 258 based on Harleys recommendation that the 258 is for higher compression engines.

I have a opportunity to buy at a very good price, so looking at my options. Kit is 29907-07 excpet that he has a 258 cam instead of the 255 that comes with the kit. Do the pistons that come with the kit raise the compression above original equipment? I can't find any documentation that answers this question either.

Thanks to all who reply.