HarleyTechTalk

After my 37's went in my bike got soft on the bottom.. The 30T pulley fixed that.. If my 55's come on too late I'll be lookin for a bigger rear pulley..

Quote from: BUBBIE on January 05, 2015, 09:52:09 PM
YES,

the 57 is are great cams BUT doesn't it requirer Head work OR Compression to use it Fully?

signed....BUBBIE

I didn't think the 57s needed any head work or compression..... I could be wrong?

From GMR's website:

Our own custom ground cam, the Genesis 577. This is a great bolt in cam from your base stock 103 to ported heads, high flow intake performance ex you name it this cam will deliver the results. Without the rattling noise of some other custom cams

I can't comment on the GMR but I put the Fueling 574 into my 103" Fat Bob with stock heads, Fatcat, Heavy Breather and SERT.  It's a similar grind to the GMR and I have had no problem.  Got 95hp/102tq too.

IMO any cam is better than the SE255 which I'm about to pull out of my CVO RG.

Have you talked to the site vendor GMR yet?

Quote from: Normthe1 on January 07, 2015, 01:52:51 AM
From GMR's website:

Our own custom ground cam, the Genesis 577. This is a great bolt in cam from your base stock 103 to ported heads, high flow intake performance ex you name it this cam will deliver the results. Without the rattling noise of some other custom cams

I can't comment on the GMR but I put the Fueling 574 into my 103" Fat Bob with stock heads, Fatcat, Heavy Breather and SERT.  It's a similar grind to the GMR and I have had no problem.  Got 95hp/102tq too.

IMO any cam is better than the SE255 which I'm about to pull out of my CVO RG.

Have you talked to the site vendor GMR yet?

Hey Normthe1,

Yes emailed Steve at GMR and the response I got was kinda along the lines of the cam works best in a 107 build at 10.5:1 compression... I think I will have to write back and ask specifically about how they would go as a bolt in for 103"s....

Those are some good numbers you got with your fueling 574s- but I think the power might come on a little too far to the right for me with an intake close of 45*

Yes it works fine in a stock 103. You have some that look only at intake close point and then talk about compression. Well if it was only that simple. 


If I am asked about the 107 kit then that would be the information I would provide. I get dozens of emails a day on the cam alone so if I was not clear that would be my fault sorry about that.

Here is one that we recently tuned. Customer installed parts. Stock engine. 



2-1-2 ex system V&H pwr dual rinehart mufflers.   pretty common ex system. as you can see same set up you can move the tq curve around a fair amount. with different mufflers  Contact me directly and I will e mail you the info you are looking for.

that's a winner 

Quote from: Gmr-Performance on January 07, 2015, 03:27:36 PM
Yes it works fine in a stock 103. You have some that look only at intake close point and then talk about compression. Well if it was only that simple. 


If I am asked about the 107 kit then that would be the information I would provide. I get dozens of emails a day on the cam alone so if I was not clear that would be my fault sorry about that.....


2-1-2 ex system V&H pwr dual rinehart mufflers.   pretty common ex system. as you can see same set up you can move the tq curve around a fair amount. with different mufflers  Contact me directly and I will e mail you the info you are looking for.......

Thanks Steve for all the extra info you have supplied. I know what I need to do now 

Quote from: 14FLHRC on January 07, 2015, 04:37:00 AM

Those are some good numbers you got with your fueling 574s- but I think the power might come on a little too far to the right for me with an intake close of 45*

I don't really subscribe to the "too far to the right" theory because I don't like to ride below 2000-2500rpm and you can always kick it down a cog to get back into the power whereas you are out of options when the cam runs out of puff, like a SE255.

Just my opinion...

Quote from: Normthe1 on January 08, 2015, 05:30:55 AM

Quote from: 14FLHRC on January 07, 2015, 04:37:00 AM

Those are some good numbers you got with your fueling 574s- but I think the power might come on a little too far to the right for me with an intake close of 45*

I don't really subscribe to the "too far to the right" theory because I don't like to ride below 2000-2500rpm and you can always kick it down a cog to get back into the power whereas you are out of options when the cam runs out of puff, like a SE255.

Just my opinion...

I look to see where you would roll the throttle based on cruising down the road. so the 2500+ area is a larger % range than under 2500.. and yes these new bikes have 6 gears for a reason.. Other wise HD would be  running a HD-Omatic 

Quote from: Normthe1 on January 08, 2015, 05:30:55 AM

Quote from: 14FLHRC on January 07, 2015, 04:37:00 AM

Those are some good numbers you got with your fueling 574s- but I think the power might come on a little too far to the right for me with an intake close of 45*

I don't really subscribe to the "too far to the right" theory because I don't like to ride below 2000-2500rpm and you can always kick it down a cog to get back into the power whereas you are out of options when the cam runs out of puff, like a SE255.

Just my opinion...

I hear / read that a LOT and it just makes me smile and shake my head. If you "can always kick it down a cog", why couldn't a SE255 rider kick it up a cog when the cam reaches it's effective upper rpm limit? Or down for that matter, whatever is needed. I'm no SE255 fan and I wouldn't put them in anything, but up to 4500 rpm or so, they flat work. Not everyone's a 5500-6000 rpm kind of rider and in a 2000-2500 rpm roll-on, you'd likely be surprised (maybe even embarrassed) by a 255 equipped motor that was properly tuned and with a guy that knows how to ride.
That is all...

I ride regularly with a bloke who has a CVO Softy with the SE255 and whilst he out accelerates me from the jump, I can catch up with him within a few seconds and then I outrun him through to top speed, both on the road with a rolling start and the standing quarter mile. 

So, the 574 suits me just fine 

255's plain run out of steam.
577 genesis, andrews 55, tman 577sm etc etc. a little more comp at least and you will have fun in the sun.
You want more!
For me - 120r   Slip the clutch. @ 2500 rpm and smoke it!  Bloody thing goes sideways!!!
Ooh that smell, can't you smell that smell, the smell that surrounds you!
Lynyrd Skynyrd
I need a new back tyre, and I have done my cam / AVRs yet!lol! Born July 1960.

Glad to hear it is all working out Jim. ..

Quote from: Sunny Jim on January 09, 2015, 06:13:25 AM
255's plain run out of steam.
577 genesis, andrews 55, tman 577sm etc etc. a little more comp at least and you will have fun in the sun.
You want more!
For me - 120r   Slip the clutch. @ 2500 rpm and smoke it!  Bloody thing goes sideways!!!
Ooh that smell, can't you smell that smell, the smell that surrounds you!
Lynyrd Skynyrd
I need a new back tyre, and I have done my cam / AVRs yet!lol! Born July 1960.

A mate of mine has just put the Hurricane RX kit through his 120R.  He's pretty happy with it!!

Quote from: joe_lyons on January 05, 2015, 06:14:38 PM
If going with headwork then that changes things.  Compression can be set properly then.

Hey Joe, if I can afford to get some head work done (but stay at 103 and stock pistons). ... which cams would respond best to a fairly standard street port?
Thanks.

My post - should read ' I have NOT installed cams and  AVR's etc yet.
Thanks Steve.
Still DIY with the tune.
Red wine can effect my dislexic post style!

Quote from: 14FLHRC on January 10, 2015, 02:22:09 AM

Quote from: joe_lyons on January 05, 2015, 06:14:38 PM
If going with headwork then that changes things.  Compression can be set properly then.

Hey Joe, if I can afford to get some head work done (but stay at 103 and stock pistons). ... which cams would respond best to a fairly standard street port?
Thanks.

Gmr 577, T Man 577( I will have an example for you next week) , Drago 580, Andrews 54, red shift 577, S&S 585 and a woods 777.  These are all cams that I think would do well set up correctly . I would talk to your head porter and see what they also recommend.

Quote from: joe_lyons on January 10, 2015, 03:48:45 PM

Quote from: 14FLHRC on January 10, 2015, 02:22:09 AM

Quote from: joe_lyons on January 05, 2015, 06:14:38 PM
If going with headwork then that changes things.  Compression can be set properly then.

Hey Joe, if I can afford to get some head work done (but stay at 103 and stock pistons). ... which cams would respond best to a fairly standard street port?
Thanks.

Gmr 577, T Man 577( I will have an example for you next week) , Drago 580, Andrews 54, red shift 577, S&S 585 and a woods 777.  These are all cams that I think would do well set up correctly . I would talk to your head porter and see what they also recommend.

Thanks! !   Will do.