204 Se Cam... : V-Twin Forum: Harley Davidson Forums

dynadad · 09-21-2008, 09:30 AM

Have been told that the stock cam in my 07 WG has a lot of overlap. Sort of a EPA pollution control cam. But if i went with the SE 203 or 204 it would run better and a lot cooler. And would pull a lot harder from 1800 to 5800 rpms. Does this sound right? I am thinking real hard on the 204s and the new S.E.R.T. pro tune. What is some of you guys thoughts?

Faast Ed · 09-21-2008, 09:42 AM

Andrews 54's will do much better.

claydbal · 09-21-2008, 09:52 AM

your stock cams have almost zero overlap.

the 204 would work better with more compression, the 203 will work with stock components , bur will say THATS ALL FOLKS by 4200 rpm.

if not boring cylinders or working heads, and staying with stock exhaust (aftermarket mufflers ) i would go with the 37 or 54 andrews, or woods 6-6. all will work for a wide rpm range and keep power in the area you use it. then if you go with 103 and/or headwork, you can still run those cams. cant really get the results from the SE line-up.

ktwillys · 09-21-2008, 10:06 AM

Quote:

Originally Posted by claydbal

your stock cams have almost zero overlap.

the 204 would work better with more compression, the 203 will work with stock components , bur will say THATS ALL FOLKS by 4200 rpm.

if not boring cylinders or working heads, and staying with stock exhaust (aftermarket mufflers ) i would go with the 37 or 54 andrews, or woods 6-6. all will work for a wide rpm range and keep power in the area you use it. then if you go with 103 and/or headwork, you can still run those cams. cant really get the results from the SE line-up.

Claydbal is right..

I am in the middle of pulling a set of 203's out of my sons 01 Wideglide.. it is very strong in the low end and mid range but like was said at right about 4200 to 4500 it runs out of juice..
Working with in the mods that we have on the bike (and since I already have the cams) we are putting in a set of S&S .510 cams..
They at least have longer legs than the 203's.
You can check out www.nightrider.com and you may have to do a little looking but you will find a spread sheet with all the current cams that are available for the twin cam and their specs..
some even have the rpm range that they operate..
and there are tons of threads on cams here..(and of course even more opinions on which ones are the best). good luck..

skyhook · 09-21-2008, 10:18 AM

dennis...9.2(stock compression) not enough for 204 with 34* intake close?

imo, se204 would work great in a stock '07 dyna...I'd want more compression on any cam with a later intake close

dynadad · 09-21-2008, 10:23 AM

Let me give a little more info. I get my jollys like this. I like to run my bike up to say 25 to 30 mph then nail it my rev is at 6200 hardley ever hit it. run it like this thrugh 3 gear. Then if i crusing at about 70 in 6 gear. I like to drop to 5th and nail it. This is where i want to feel it pull out . What cam is best for this?

skyhook · 09-21-2008, 10:49 AM

I'm sticking with se204...or if you want more torque below 4000 rpm, andrews 21 or se255

arealinvestor · 09-21-2008, 11:34 AM

Quote:

Originally Posted by dynadad

Have been told that the stock cam in my 07 WG has a lot of overlap. Sort of a EPA pollution control cam. But if i went with the SE 203 or 204 it would run better and a lot cooler. And would pull a lot harder from 1800 to 5800 rpms. Does this sound right? I am thinking real hard on the 204s and the new S.E.R.T. pro tune. What is some of you guys thoughts?

Both the SE 203 & 204 are bolt in cams.The 203 has a intake close of 36,the 204's intake close is 34.Where do you want your power to be? Both these cams will produce low end grunt/tq with some midrange.The 203 will probably pull to about 4800rpm,the 204 about 4500rpm.With these early intake closes ,your not going to be able to run much comp.Comp will have to stay close to stock.If you run to much comp with an early intake close you run the risk of overcompressing the mixture.It will turn the build into a ping monster!!!!!!

dynadad · 09-21-2008, 12:40 PM

Quote:

Originally Posted by arealinvestor

Both the SE 203 & 204 are bolt in cams.The 203 has a intake close of 36,the 204's intake close is 34.Where do you want your power to be? Both these cams will produce low end grunt/tq with some midrange.The 203 will probably pull to about 4800rpm,the 204 about 4500rpm.With these early intake closes ,your not going to be able to run much comp.Comp will have to stay close to stock.If you run to much comp with an early intake close you run the risk of overcompressing the mixture.It will turn the build into a ping monster!!!!!!

Plan of leaving everything stock.

claydbal · 09-21-2008, 01:27 PM

Quote:

Originally Posted by skyhook

dennis...9.2(stock compression) not enough for 204 with 34* intake close?

imo, se204 would work great in a stock '07 dyna...I'd want more compression on any cam with a later intake close

hehe, if you get 9.2????? lots are around 8.8. hard to remember, and i dont do enough SE stuff, but doesnt the 204 have a weird LSA or duration that makes it work later and bleed more compression that the 203????

or maybe i got it confused?

claydbal · 09-21-2008, 01:32 PM

Quote:

Originally Posted by dynadad

Let me give a little more info. I get my jollys like this. I like to run my bike up to say 25 to 30 mph then nail it my rev is at 6200 hardley ever hit it. run it like this thrugh 3 gear. Then if i crusing at about 70 in 6 gear. I like to drop to 5th and nail it. This is where i want to feel it pull out . What cam is best for this?

tw55 @ 11 to 1. serious headwork.
woods9 "" "" "" ""

or more serious for not beating the motor so hard, how bout the woods 7h?

arealinvestor · 09-21-2008, 01:54 PM

Quote:

Originally Posted by claydbal

hehe, if you get 9.2????? lots are around 8.8. hard to remember, and i dont do enough SE stuff, but doesnt the 204 have a weird LSA or duration that makes it work later and bleed more compression that the 203????

or maybe i got it confused?

The later the intake close,the more comp is bleed off unless you raise the comp.If your keeping stock comp then the SE 203,204 will work fine.It's once you raise comp then you could have problems with the early intake close.It will raise starting comp and you will have a hard time starting bike without releases!!!!I would use the 204 with stock comp if i was going with a chain drive cam!!!!!!!

claydbal · 09-21-2008, 02:02 PM

Quote:

Originally Posted by arealinvestor

The later the intake close,the more comp is bleed off unless you raise the comp.If your keeping stock comp then the SE 203,204 will work fine.It's once you raise comp then you could have problems with the early intake close.It will raise starting comp and you will have a hard time starting bike without releases!!!!I would use the 204 with stock comp if i was going with a chain drive cam!!!!!!!

not neccesarily. reference HD 255 and woods 6. one closes at 40, but doesnt bleed alot of comp. the 255 seems to make comp.??

skyhook · 09-21-2008, 02:05 PM

dennis...pistons .01" down, .045" gasket, 86cc heads makes 9.12...you're prolly right about the cam spec differences between 203 and 204

claydbal · 09-21-2008, 02:13 PM

Quote:

Originally Posted by skyhook

dennis...pistons .01" down, .045" gasket, 86cc heads makes 9.12...you're prolly right about the cam spec differences between 203 and 204

yep,d oem gasket is .052, and you know how crazy the cc are.

i am kinda asking about the difference between 203 and 204. seems thats what i remember, ????????????????????????