I'm in need of a clutch has anybody used the smf sd from macs? I really dont want a dd set up. mainly because of the cost. I keep waiting for sbc to make theres. but now i cant pull anything without it slipping. is there any other set up out there? my truck puts out just a little over 430 hp
thanks

Talk with Evan at Crank it Up, he's OSUduramax here on the site. He'll take care of you and get you some pricing on the kits.

It sounds like the SBC/SD will be avaliable soon from what has been posted in that thread. I'd stick with SBC personally. I'm very satisfyed with my SBC/DD and highly recomend SBC.

Call up Evan and go with the Macs performance flywheel and single disc clutch. The flywheel is billet steel and it has a sprung hub; so it’s the quietest single mass flywheel you can buy, plus you can put the duel disc clutch on later if you want more holding power. I run the Hot Juice and the flywheel/clutch work flawlessly.

Good luck with whatever you decide on.

so it’s the quietest single mass flywheel you can buy

That's kinda a odd statement providing the SBC isn't out yet. :rolleyes:

Yes it is the quietest because of it having a sprung hub which the SBC does not have. Deadeye said in another thread that the SBC smf/sd would not have a sprung hub.

so it’s the quietest single mass flywheel you can buy

That's kinda a odd statement providing the SBC isn't out yet. :rolleyes:

Seeing as you can't buy a SBC single mass unit, I would say there is nothing wrong with his statement

It sounds like the SBC/SD will be avaliable soon from what has been posted in that thread. I'd stick with SBC personally. I'm very satisfyed with my SBC/DD and highly recomend SBC.

We'll fix yah up with a Mac's or a SBC.... THe Mac's is here now and they have been run for about 3 years now and are the only one on the market with a sprung hub....this helps "smoothness" and "the noise"...also they will handle alot more than stock HP (430 hp will be no problem.. :) )

On top of that my sm flywheel is the same one for a dual disk... so at any time you can upgrade to a DD clutch.. or sell it to someone that wants a dd

But the choice is yours.....:)

What the cost difference between the dd and sd mac's

The last time i talked to evan he said it would be a week or so before the macs flywheels were done. and the cost was around $1600 the other post says the sbc sd should be around $1000 but if it doesnt have a sprung hub the macs might be quieter.

Correct me if I'm wrong but that looks like a sprung hub?
www.southbendclutch.com/chevy_catalog.html

i am going to need a new clutch/flywheel soon but plan on wating untill i have some more money saved up and the sbc single to come out but... will the sbc be too loud in the cab? i don't want a really loud internal noise in the truck i already have the strait piped exhausst to deal with.

You won't notice it in the cab if you have your windows up. I only notice it when I have my window down and my clutch depressed. Peter just
e-mailed me a link,probably the one Cheyenne19 posted up. People need to make sure they know before the talk. No offence to anyone, just something to keep in mind. Make your minds up from there. I'm sure both clutches are very good,but the SBC is priced a little better.

You won't notice it in the cab if you have your windows up. I only notice it when I have my window down and my clutch depressed. Peter just
e-mailed me a link,probably the one Cheyenne19 posted up. People need to make sure they know before the talk. No offence to anyone, just something to keep in mind. Make your minds up from there. I'm sure both clutches are very good,but the SBC is priced a little better.

First off... you can hear the tranny rattling some in the cab (in nutral with foot off clutch that is) with eather set-up...SBC or Mac's....DD.....our single has been proven quieter to date..the SBC version my as well be quieter)..... if your foot is on the clutch a macs dose not rattle.... I tell people that the Drive-through food places will ask you to shut your truck off now if they didn't befor... (Like you own a diesel or somthin.....):h ) or push in the clutch while ordering....

.so what you are hearing when dipressed (01Duramax6spd) is your floater rattle since it is not strapped like a Macs..... this is only there with a SBC setup.....which eather way works i might add....except for the fast food thing..):h ....


the noise we are refering to is the rattle from the tranny when in nutral with foot off clutch...


If I am the "PEOPLE" refered to in your post.....I stand corected.......I Went off what Deadeye Posted and i should have Used a more credable scorce like peter or A SBC person or Website..You think distributers like me would know but, I was wrong.......Thanks for the link Guys


The price difference come from the CAST flywheel... SBC has cast a flywheel as a more affordable option than a billet one.... this keeps the price down a good little bit... which is nice for some people who arn't in for performance....

First off... you can hear the tranny rattling some in the cab (in nutral with foot off clutch that is) with eather set-up...SBC or Mac's....DD.....our single has been proven quieter to date..the SBC version my as well be quieter)..... if your foot is on the clutch a macs dose not rattle.... I tell people that the Drive-through food places will ask you to shut your truck off now if they didn't befor... (Like you own a diesel or somthin.....):h ) or push in the clutch while ordering....

.so what you are hearing when dipressed (01Duramax6spd) is your floater rattle since it is not strapped like a Macs..... this is only there with a SBC setup.....which eather way works i might add....except for the fast food thing..):h ....


the noise we are refering to is the rattle from the tranny when in nutral with foot off clutch...


If I am the "PEOPLE" refered to in your post.....I stand corected.......I Went off what Deadeye Posted and i should have Used a more credable scorce like peter or A SBC person or Website..You think distributers like me would know but, I was wrong.......Thanks for the link Guys


The price difference come from the CAST flywheel... SBC has cast a flywheel as a more affordable option than a billet one.... this keeps the price down a good little bit... which is nice for some people who arn't in for performance....

Evan,you are so right.People at the fast food places look at you like WTF is wrong with your truck :rolleyes: . I wasn't refering to you at all. I guess if you stated it was not a sprung hub I missed.I saw it in another post. Either route you choose you will have something much,much better than that Censored DMF. The main thing is that we zf6 guys can lay some big #'s right? :exactly:

OSUDuramax The price difference come from the CAST flywheel... SBC has cast a flywheel as a more affordable option than a billet one.... this keeps the price down a good little bit... which is nice for some people who arn't in for performance....
So will the billet flywheel hold more hp?

So will the billet flywheel hold more hp?

No... but it will take more abuce and is SFI from Mac's or SBC....

The type of disk and plate load will determan the Holding Power of a clutch..

.so what you are hearing when dipressed (01Duramax6spd) is your floater rattle since it is not strapped like a Macs..... this is only there with a SBC setup.....which eather way works i might add....except for the fast food thing..):h ....




THIS is the noise that bothers me the most. I think Mac has the right idea here...

THIS is the noise that bothers me the most. I think Mac has the right idea here...

Yea, but with a strapped center plate you got shims to deal with vs noise.

As I recall, my post about no hub was not about the SD kit. Hopefully, once SBC gets this done they will be able to get GM to consider using it for future durmax manuals (as opposed to giving up manuals.)

"Yea, but with a strapped center plate you got shims to deal with vs noise."

Deadeye any clutch with a strapped floater is quieter and smoother driving. All Mac's clutches come ready to assemble with the proper shims already assembled and can be sent out without shims if the customer prefer's (in case someone couldn't count). You need to quit being against a competitors advantage. The Mac's cluches with shims are equivalent to a clutch without until the one without wears and has to be rebuilt when the Mac's clutch can be readjusted and used again without spending more money.

"Yea, but with a strapped center plate you got shims to deal with vs noise."

Deadeye any clutch with a strapped floater is quieter and smoother driving. All Mac's clutches come ready to assemble with the proper shims already assembled and can be sent out without shims if the customer prefer's (in case someone couldn't count). You need to quit being against a competitors advantage. The Mac's cluches with shims are equivalent to a clutch without until the one without wears and has to be rebuilt when the Mac's clutch can be readjusted and used again without spending more money.

I am not against the Crank it up Diesel product (not yours anymore?). And the last post I made was an opinion about differences between the two products. Just an opposite opinion that Kennedy had posted.

BTW, you have been arguing more about these products than any one else on this forum. In fact, since you returned to the forum, you have argued with nearly every post I made. Seems like you got a new hobby . . . ):h

BTW, I look forward to seeing you again on June 1 :D

I only "argue" or in my terms correct people who don't know what they are talking about. I guess your just wrong more than most in the subject matter I know about. I am the only one not afraid to tell it like it is when your running down the other clutch. South Bends product is an OK product but it doesn't do anything better than a comparable Mac's and is within a few dollars on comparable setups.
The single disc is still not out but I think will be South Bends best attempt yet and if not at least it sounds like it's going to be cheaper like they said when they were working on the Dual disc.

BTW you look forward to seeing me June 1? I know your not right now. Why on earth would you look forward to going to court.

Obviously, every one else is wrong, even SBC with 50+ years of experience.

South Bend is just like you and never actually sled pulled theirself. Therfore there are people out there with more knowledge in that area. Also some of there reasons for not using things such as a strapped floater are for cost reasons and not for the overall product.

BTW I had well over 100 years of clutch experience on the job helping me when I was working on the clutches I used to build but that doesn't really matter to me and shouldn't to anyone. The only thing that matters is the actual product and as far as I know Mac's clutches are still at a 0% failure rate.

I am not against the Crank it up Diesel product (not yours anymore?). And the last post I made was an opinion about differences between the two products. Just an opposite opinion that Kennedy had posted.

BTW, you have been arguing more about these products than any one else on this forum. In fact, since you returned to the forum, you have argued with nearly every post I made. Seems like you got a new hobby . . . ):h

BTW, I look forward to seeing you again on June 1

I think your "new hobby" is "Throwing rocks" at my product whenever you can ....:badidea:

I think you differences with craig should not be reflected towards my product...:mad:

I am a SBC distributer as well as the Mac's Clutch Builder and have sold several SBC products in the last few months, you don't see me Reaching for every chance to run SBC into the ground or make my own product sound 50 times better than theirs...When that is up to the customer to decide based on His or Her application....and personal preference...

Please Stick to the resonable facts and truth...

Sled Pulling / towing season is here...we shall see how the clutches hold up and get actual feedback from the customers....that is what I've been waiting on

Everyone feel free to Ask if you need any Handshaker Sled pulling Tips......:grd:

Just an opposite opinion that Kennedy had posted.



So your opinion is that noise when you push in the pedal is an acceptable tradeoff to eliminate shims that never NEED adjusting? I think it sounds like someone dragging a putty knife on the flywheel and would not want that on my truck.

"Yea, but with a strapped center plate you got shims to deal with vs noise."

Deadeye any clutch with a strapped floater is quieter and smoother driving. All Mac's clutches come ready to assemble with the proper shims already assembled and can be sent out without shims if the customer prefer's (in case someone couldn't count). You need to quit being against a competitors advantage. The Mac's cluches with shims are equivalent to a clutch without until the one without wears and has to be rebuilt when the Mac's clutch can be readjusted and used again without spending more money.

Makes sense to me.



FWIW JJ likes his SBC Dual ferramic clutch so far. He has adapted his driving style and gets very little chatter, but this is because he lets the clutch out very quickly. It will be interesting to see how it works with a trailer load. We adjusted up his idle and the noise is better (no Lucas in gearbox yet) but it just sounds bad when you push in the pedal.

I can see how some people might not like the noise. I really don't but only notice it when my window is down.At least I can pull my trailers though. With that Censored DMF I couldn't ever eccelerate hard stock with a trailer of it would slip. As to pulling a trailer. Just go. I have not had a problem pulling 20k with mine.You need to start out if 1st obviously or if you really want to start is 2nd turn the power up and be prepared to leave some rubber :D cause it sure will.

Sled Pulling / towing season is here...we shall see how the clutches hold up and get actual feedback from the customers....that is what I've been waiting on




The noise is still annoying, but i do love the holding capabilities of the clutch this past weekend i hauled my buddies 73 3/4 ton lifted chevy (6100lbs) to Ocean City MD on a 4800lb trailer , the sbc worked great towing is a little jerky pulling out but but never slipped hauling this weight @about 400 rwhp and there are some pretty good hills from here to there, also during the 4 days i was down there i did some pretty hard driving/racing at about 500 rwhp and the cluth worked flawlessly:ro) , still cant shift as fast as an auto though:lol: !!!

Later
Caleb