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[Twolanerider]

TwoLane,

Zippers has been selling these for years now - try this link

[DCFIREMANN]

Man I need to follow this thread more closely.

[Twolanerider]

Need to be careful suggesting things that sound so interesting or to be so much fun Dawg.  My best friends live just north of the Beltway and I usually get there once or twice a year.  It'd only be a short hop to take a tour of Zippers on the same trip sometime.  My buddy works at the funny five sided building I used to spend so much time at and I'm sure he'd appreciate tagging along for something that interesting.

[jdk20723]

Don,
Nice to hear you know of Dick Hilferty.  He's never been the type of guy to blow his own horn about what he knows (plenty).  We discovered his genius in the very early days of Zipper's (early 80's) and have relied on his knowledge and input since then.  Sometime in the late 80's, Dick decided to get out of the business altogether; we were able to persuade him to stay in it with us as a partner.  Dick would do the design work, we would test; he would do the actual lobe grinding and after heat treat we would do all of the final cylindrical grinding and finish work.  It was done this way for the last 12 or so years.  Last year he decided he'd done enough and still had some other things he wanted to do while he still could, so we moved the Berco grinders, masters and tooling in-house for full production here at Zipper's (under his watchful eye).  He is still doing design work (we are testing a new grind now), and we are in touch with him regularly.  He's a pretty amazing fellow, with lots of energy (he's 74, I'm 47 and I think he can outlast me!).  

Just giving credit where it's due..........JK

PS Jim, glad it's working out for you.....we knew it would.......

[Twolanerider]

Don,
Nice to hear you know of Dick Hilferty.

[Twolanerider]

Don't mean to hijack this thread.  So perhaps just a temporary detour still within the Zipper's realm.

If someone has specs on the Hilferty cams is there something that will do what the Harley 251 would do for low end as a replacement in an otherwise internally stock 103 on our bikes?

I'd like a little more mountain climbing/two lane passing type of torque and smoothness of the roll on is important to me.  But it's good enough to begin with that I'm just not interested in opening up the motor.  I would like to go to gear drive though.  So killing two birds with two cams is something well within consideration.

[DCFIREMANN]

Don Red Shift has a cam called the 557tc. It is gear driven and has 557 lift and 242/244 duration. I am not sure about the cam timing of the 251 or 253 as I don't have the SE catalog in front of me. Timing on the 557 is intake 20/101/42 and exhaust 46/104/18. Also one thing about a red shift set of cams, if you running the Thunder Max ECM they most likely have a map for the setup. If not it won't take much to convince them to try to get it on the dyno schedule.

I know some people are talking about a gear drive version of the 253. I spoke with Danny over at Zippers about it. He did think it was a good idea but I am not sure what really is involved in getting someone to start a project like this. I'm also not sure about the cost to do a start up  and would it be worht it. How many people would by a cam like that? Now if one of the rumors are true that all touring bikes next year will come with a 103 then it would be worth it I would think.

Be Safe

THE DAWG

[Twolanerider]

Don Red Shift has a cam called the 557tc. It is gear driven and has 557 lift and 242/244 duration.

Thanks Dawg.  It's become time for a bit of unanticipated homework.

[JimsSEEG]

John (JDK),

Been very please with the new unit so far. Should be able to get back in the shop later this week and look at the SW. Will drop a line or call to see if I can get anything on this hiccup.

I'll admit, I was skeptical. Once installed, made a world of difference. I'll continue to update the thread here since  some of the guys are still on the fence. Hopefuly they will get off the fence in a couple of weeks. I can safely say, I won't be returning the unit.

DAWG - Let me know what you're looking at. Would like to bump CR to 10:1 or 10.2:1, but not any higher, just too damn hot here in the summer. I'm sure John prpbably has some reccomendations....  [smiley=laugh.gif] Then cam talk about the rest of the goodies.  Hmmm... going to have to start another book...

Jim

[DCFIREMANN]

John (JDK),

Been very please with the new unit so far. Should be able to get back in the shop later this week and look at the SW. Will drop a line or call to see if I can get anything on this hiccup.

I'll admit, I was skeptical. Once installed, made a world of difference. I'll continue to update the thread here since

[Mr. We]

Again Zippers has a great deal going on the Thunder Max and if enough people are interested I will go talk to them about a [bgcolor=Yellow]group buy[/bgcolor].

Now yer talkin! I worked/snoozed right through the D&D Fatcats but I'll try to keep an ear to the ground on this one.  [smiley=xyxthumbs.gif]

[grc]

Don't mean to hijack this thread.

[Twolanerider]

Thanks GRC.

[DCFIREMANN]

I need to check the valve timing numbers on the 253 they just don't look right. I do like the numbers on the 557 for a gear driven replacement. Thanks you guys.

Be Safe

THE DAWG

[grc]

I need to check the valve timing numbers on the 253 they just don't look right. I do like the numbers on the 557 for a gear driven replacement. Thanks you guys.

Be Safe

THE DAWG

Dawg,

The numbers for the 253 do look weird, but that's directly from the S.E. catalog.