cam upgrade - clutch slippage?

[berms]

Decided to stay at 96" for now and just bolt in some SE204 cams. I have seen that this combo often gets 90HP and 100TQ with a good 2-1 pipe, a/c and a good tune...

With these numbers will my stock (2012 dyna) clutch be slipping?? Will it need a heavier spring?  Should I be looking at VP92T kit?

Thanks for any advice.

.

[klammer76]

My 95" 02 FLHTC makes 103 TQ & 90 HP, stock clutch, no problems.

Klammer

[berms]

My 95" 02 FLHTC makes 103 TQ & 90 HP, stock clutch, no problems.

Klammer

Hi Klammer, your stock clutch spring in your 02 FLHTC may be heavier that my stock spring. As far as I know they changed them in 2006? This may be why you dont get any slipping.

[Ohio HD]

Decided to stay at 96" for now and just bolt in some SE204 cams. I have seen that this combo often gets 90HP and 100TQ with a good 2-1 pipe, a/c and a good tune...

With these numbers will my stock (2012 dyna) clutch be slipping?? Will it need a heavier spring?  Should I be looking at VP92T kit?

Thanks for any advice.

.

It might, depends on how hard you ride it really. My '08 SG clutch would slip a little in 5th and 6th after I added Andrews 48's, D&D header, tuned. SE spring took care of it easily. 

[JYHD1]

I'd sure try it with the stock clutch first. We have (2) 08 Road King Classics both at 96" with the 204's, A/C, pipes, TTS tuners, and tuned, that make right at those #'s on both of them and haven't had any problems with clutch slippage on either. I don't do burnouts or hard launches with them as it's almost always 2 up riding but they are ridden fairly hard, especially the one we keep here in Arkansas with all the hills.(they like to call them mountains down here ! )

I think you're going to like the SE204's , I know we sure do.

                                      John

[Herko]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

[BUBBIE]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

Herko,

What make and who sells the spring you reference here? (09 FLHR to fit stock clutch)

Thanks

signed....BUBBIE

[Ohio HD]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

Herko,

What make and who sells the spring you reference here? (09 FLHR to fit stock clutch)

Thanks

signed....BUBBIE

He's probably referring to 37871-98A. It's the '98 to '05 spring. I have one for my '09 Ultra for when I put the Andrews 48's I have in her.

[bigfoot5x]

Either that or it is the SE clutch spring sold by HD. I know that one is right at $30.

[Ohio HD]

Either that or it is the SE clutch spring sold by HD. I know that one is right at $30.

Yep, I have the SE spring in m SG with a 107, it needed it. The Ultra I'll get away with the earlier clutch spring. The lever pull for it is somewhere between the stock '06 up and the SE springs.

[Herko]

Herko,

What make and who sells the spring you reference here? (09 FLHR to fit stock clutch)

The 37951-98 SE spring, rated at 340 lbs or 380 lbs depending on who you talk to.
Aim-Tamachi and Energy One also carry springs of that rating for about $30 as well.

[berms]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

Herko, thanks for the advice. With the 340lbs spring how much heavier is the clutch lever pull? I like the stock 2012 lever effort and don't really want to go any heavier.... can you suggest any other upgrades that keep lever pull effort to a minimum or at least the same as a current model dyna? Should I be looking at a variable pressure clutch kit such as AIM VP92T or Energy one clutch kit?
Thanks

[berms]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

Herko,

What make and who sells the spring you reference here? (09 FLHR to fit stock clutch)

Thanks

signed....BUBBIE

He's probably referring to 37871-98A. It's the '98 to '05 spring. I have one for my '09 Ultra for when I put the Andrews 48's I have in her.

Ohio, have you actually put the 37871-98A spring in? exactly how much did it effect the lever pull?

[Ohio HD]

Clutch slip may not be 'felt' on the road but will show up on the Dyno.
On the road slip can be insidious.

Anything above a stage one...spend the $29 for the heavier spring especially if 2006 or newer. Other clutch upgrades as needed.

Herko,

What make and who sells the spring you reference here? (09 FLHR to fit stock clutch)

Thanks

signed....BUBBIE

He's probably referring to 37871-98A. It's the '98 to '05 spring. I have one for my '09 Ultra for when I put the Andrews 48's I have in her.

Ohio, have you actually put the 37871-98A spring in? how did it effect the lever pull?

No, not yet, it's going in my Ultra next Summer when I put the Andrews 48 cams in. I won't need the Screaming Eagle spring for just the Andres 48 cams. The 37871-98A spring has 30 more pounds of force than the '09 clutch spring, and will keep the clutch from letting go in higher gears.

Check out the HD clutch spring info here, from FSG.
http://harleytechtalk.com/htt/index.php/topic,34648.msg357566.html#msg357566

[Herko]

Herko, thanks for the advice. I don't want to make the lever pull any heavier, so I'd rather not just put a heavier spring in.... can you suggest any other upgrades that keep lever pull effort to a minimum or at least the same as a current model dyna? Should I be looking at a variable pressure clutch kit such as AIM VP92T or similar?
Thanks

The 37871-98A won't have the static grip of the 37951-98 SE spring.
Use the 37951-98 SE spring with the likes of the VPC or Wiz Clutch to chage the fulcrum point to make the lever pull easy on the hand/forearm. You'll be good to go then.

[Herko]

will keep the clutch from letting go in higher gears.

Again, slip can be insidious. What you don't feel on the road can be seen on the Dyno.

[berms]

Herko, thanks for the advice. I don't want to make the lever pull any heavier, so I'd rather not just put a heavier spring in.... can you suggest any other upgrades that keep lever pull effort to a minimum or at least the same as a current model dyna? Should I be looking at a variable pressure clutch kit such as AIM VP92T or similar?
Thanks

The 37871-98A won't have the static grip of the 37951-98 SE spring.
Use the 37951-98 SE spring with the likes of the VPC or Wiz Clutch to chage the fulcrum point to make the lever pull easy on the hand/forearm. You'll be good to go then.

OK thanks again for the advice. What is "static grip"?

[Ohio HD]

will keep the clutch from letting go in higher gears.

Again, slip can be insidious. What you don't feel on the road can be seen on the Dyno.

I'm sure that you're right. My Ultra doesn't get run hard, the 48's are going in to get a little more low and mid speed grunt, stock exhaust and air breather will stay on her. The clutch spring is just to add a little reassurance.

I have an SE spring on my Street Glide, it holds up well, even when running really hard. It's a 107 top end. Just don't see the need for the extra clutch lever pressure for the Ultra, seeing its a easy cruiser.

[Herko]

What is "static grip"?

The clamping force you have without any advantage of a centrifugal device.
Example: the VPC devices don't do much for added grip until about 2500+ engine RPM is realized.

[berms]

Herko, thanks for the advice. I don't want to make the lever pull any heavier, so I'd rather not just put a heavier spring in.... can you suggest any other upgrades that keep lever pull effort to a minimum or at least the same as a current model dyna? Should I be looking at a variable pressure clutch kit such as AIM VP92T or similar?
Thanks

The 37871-98A won't have the static grip of the 37951-98 SE spring.
Use the 37951-98 SE spring with the likes of the VPC or Wiz Clutch to chage the fulcrum point to make the lever pull easy on the hand/forearm. You'll be good to go then.

Thanks,  so just to be sure that I understand, you are saying that just using the 37871-98A spring with my stock clutch won't be enough to stop slippage when you get up to 100ft-lbs of TQ?

[Admiral Akbar]

Herko, thanks for the advice. I don't want to make the lever pull any heavier, so I'd rather not just put a heavier spring in.... can you suggest any other upgrades that keep lever pull effort to a minimum or at least the same as a current model dyna? Should I be looking at a variable pressure clutch kit such as AIM VP92T or similar?
Thanks

The 37871-98A won't have the static grip of the 37951-98 SE spring.
Use the 37951-98 SE spring with the likes of the VPC or Wiz Clutch to chage the fulcrum point to make the lever pull easy on the hand/forearm. You'll be good to go then.

Have you checked any Wizes on the dyno?

Max

[berms]

Hay Max, I'm also interested in Wiz Clutch..... seems there are quite a few products / companies on the market that claim to reduce clutch lever pull. Using one of these in combination with a heavier spring as Herko has suggested seems like a good option for me.

[berms]

Anyone got any feedback on this Energy One spring? Says its 10% stronger than factory spring. Will that be enough?

http://www.energyoneclutches.com/product.php?productid=17&cat=16&page=1

[FSG]

Anyone got any feedback on this Energy One spring? Says its 10% stronger than factory spring. Will that be enough?

http://www.energyoneclutches.com/product.php?productid=17&cat=16&page=1

Diaphragm style Clutch Spring for 1998 Big-Twin & Twin Cam Models thru Present. 10% stronger than stock for smooth, positive hand lever engagement. Perfect for ..........   

It's not just Energy One, but it pisses me the way they advertise these things. 

Between 1998 and 2006 there were 3 stock springs so which one is this spring 10% stronger than ?

Unless the tell me what it's rated at I consider it perfect for SFA.

[berms]

Anyone got any feedback on this Energy One spring? Says its 10% stronger than factory spring. Will that be enough?

http://www.energyoneclutches.com/product.php?productid=17&cat=16&page=1

Diaphragm style Clutch Spring for 1998 Big-Twin & Twin Cam Models thru Present. 10% stronger than stock for smooth, positive hand lever engagement. Perfect for ..........   

It's not just Energy One, but it pisses me the way they advertise these things. 

Between 1998 and 2006 there were 3 stock springs so which one is this spring 10% stronger than ?

Unless the tell me what it's rated at I consider it perfect for SFA.

Yes, I see what you mean....

What are your thoughts on changing out the plates instead of the spring? A set of energy one plates say they offer a higher coefficient of friction due to the added plate and Kevlar lining??  Is this true?

This clutch thing is way confusing... All I need is a clutch that handles 100ft-lbs TQ and one that doesn't make the lever effort any heavier than 2012 stock if thats possible.

Thanks