SE 103 kit CR? - Page 2 : V-Twin Forum: Harley Davidson Forums

cmueller · 07-14-2008, 08:57 AM

Thanks all for your input - I now think the CR will be 9.2 with stock cams, talked to Andrews and they have a new cam (54H) for 103 engines with a CR less than 10.0, supposed to be strong to 5600, and with my light Dyna should really haul butt. Will end up costing me less than a grand. ( got the 103 for $400 new from dealer)

arealinvestor · 07-14-2008, 12:27 PM

Quote:

Originally Posted by ceraaa42

Interesting observation, maybe you should look at my ride report and dyno sheet over here;
http://www.v-twinforum.com/forums/dr...et-baffle.html

This bike pulls like an animal from low to midrange. Falls off after about 5000rpm, right where I rarely take this engine. It's bagger, I just ride the thing and when I pass I want it to get going. And I did it without spending lots of money.

Let me know what you think, and as I said; if I were to do it again I'd put in the compression releases.

Chris

Well it suits your riding style then thats ok.Thats all that matters.You want my honest opinion?Would i be happy with it? Absolutely not!!!!This is not a pissing match,and i'm not trying to piss on your build.You built what you like and your happy with it!!!!!Thats all that matters!!!!!!!!!

BMoscato · 07-14-2008, 01:49 PM

Arealinvestor, I think a lot of us try to find the happy medium between cost and engine size. I know I'm not rich and I may have to compromise some when I do my build this winter. I've noticed that ceraaa42 has said in more than one post that he was happy with his build and he didn't spend a fortune getting the results that his dyno sheet supports.

What build are you going too? What bike are you buying? These are all things that ceraaa42 already has figured out and has given his input in this thread based on owning the SE 103 kit.

arealinvestor · 07-14-2008, 02:08 PM

Quote:

Originally Posted by BMoscato

Arealinvestor, I think a lot of us try to find the happy medium between cost and engine size. I know I'm not rich and I may have to compromise some when I do my build this winter. I've noticed that ceraaa42 has said in more than one post that he was happy with his build and he didn't spend a fortune getting the results that his dyno sheet supports.

What build are you going too? What bike are you buying? These are all things that ceraaa42 already has figured out and has given his input in this thread based on owning the SE 103 kit.

.I agree we must sacrifice somewhat due to money constraints.

route66paul · 07-14-2008, 02:10 PM

Quote:

Originally Posted by Diggerpine

Diggerpine here; The SE 103 kit, PN#29903-07A does not come with the SE-255 cams. The kit uses the stock cams, I could be wrong but I would say the CR is the same as stock. The only difference would be larger flat-top pistons.

Ride Safe!
Steven

There is a boost with bigger flattops, even if the piston has the same negative deck height. With a piston with the proper deck height and an .030 gasket, you are getting close to 9.5:1 on a 96 to 103 conversion, maybe 9.6:1. It all depends on the combustion volume, some of the 96 engine heads have much more volume than their big brothers, the 88in heads. The only sure way is to do the math, and that means measuring and CCing to be sure.

As far as just bolting on some heads and a cam, you could get lucky. Remember that what Andrews says and what is said here is a little different. A little difference in compression(lower) isn't always bad, sometimes it will tune just as well or better. You have to take the advnace out of most high comp builds anyway(that is de-tuning)

ceraaa42 · 07-14-2008, 02:18 PM

Quote:

Originally Posted by arealinvestor

This is not a pissing match,and i'm not trying to piss on your build.

I wasn't trying to get into one either, but remember there are a lot of people that read these threads other than us.

You were making leading statements about poor low to midrange power problems with the 103/SE255 cam build as thats where you wanted your power. This is not the case with this kit, it builds low crossing 100tq at about 2500rpm. It starts to fall off about 4500, then goes down at 5000rpm. At little early forsure and I've built engines that didn't start to fall until about 5500rpm. But they were over $3000 more including the tune. This one, about $1200. Plus labor in all cases if you can't do your own.

I'd be interested to know, have you already done a build or planning one? Just courious is all. I'm alway interested in what other have done since it's a good learning chance.

Good luck,

Chris

arealinvestor · 07-14-2008, 02:22 PM

Quote:

Originally Posted by ceraaa42

I wasn't trying to get into one either, but remember there are a lot of people that read these threads other than us.

You were making leading statements about poor low to midrange power problems with the 103/SE255 cam build as thats where you wanted your power. This is not the case with this kit, it builds low crossing 100tq at about 2500rpm. It starts to fall off about 4500, then goes down at 5000rpm. At little early forsure and I've built engines that didn't start to fall until about 5500rpm. But they were over $3000 more including the tune. This one, about $1200. Plus labor in all cases if you can't do your own.

I'd be interested to know, have you already done a build or planning one? Just courious is all. I'm alway interested in what other have done since it's a good learning chance.

Good luck,

Chris

No build yet.still gathering all the intellegence!! & money!!!!!!!The latter being the biggest problem.

ceraaa42 · 07-14-2008, 04:06 PM

Quote:

Originally Posted by arealinvestor

No build yet.still gathering all the intellegence!! & money!!!!!!!The latter being the biggest problem.

If you don't mind if I ask, what's your plan with what you've got to work with. I can assure you I've spent a ton of money in the learning process, and it might be fun to help someone not make the mistakes I've made.

Actions from the wife, IYKWIM. LOL

Can you do the work yourself? I'm sure you know this would save a huge amount of money. It's always the balancing act to find the power you want at what you have to spend. I usually take the top amount, then figure another 20% above that. There always is more that comes up. Like when I did my 06 EG, tore it down, there is was, new oil pump needed. I think the Feuling was about $375 that I didn't figure in.

What kind of bike?

Chris

arealinvestor · 07-15-2008, 05:46 AM

2008 ultra classic.my budget 8,000-9,000

ceraaa42 · 07-15-2008, 10:32 AM

Quote:

Originally Posted by arealinvestor

2008 ultra classic.my budget 8,000-9,000

Hey! That'll work.

Out comes the engine, send to Randy (King of Cubes), tried and true 124 kit goes in with everthing that needs done to make a nice engine, heavy clutch, yep your there.

What's your time frame?

How about some pics of the scoot?

Chris

arealinvestor · 07-15-2008, 12:41 PM

Quote:

Originally Posted by ceraaa42

Hey! That'll work.

Out comes the engine, send to Randy (King of Cubes), tried and true 124 kit goes in with everthing that needs done to make a nice engine, heavy clutch, yep your there.

What's your time frame?

How about some pics of the scoot?

Chris

Probably going to get it done this winter.Pics coming soon!!!!!!!!!