eNVy Racing Bi-Directional Flywheel Installation

Manufacturer of High Performance Aftermarket Hop Ups for the Savage

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eNVy Racing Bi-Directional Flywheel Installation

Post by oarie » Mon Feb 21, 2005 8:18 pm

We've been having some problems getting eNVy Racings HQ hooked up with internet access so I'm going to post some instructions on how to install their newest addition to their product line up, the new and improved Bi-Directional clutch set.

Some important key notes about this product and why it is superior to other manufacturers similar products are:

    Flywheel is made out of 7075-T6 aluminum, not cheap-o 6061-T6. This is of great importance due to the fact that the shoes are 7075-T6 as well. It is not necessarily that there is anything wrong with 6061, but when the shoes are harder than the flywheel, the flywheel wears instead of the shoes. This is a problem with the GPM setup because theie 6061-T6 flywheel ends up wearing out before the shoes do. Not good.

    Built in ledge on the flywheel so the stock HPI clutch nut can be used instead of requiring a big, awkward and expensive nut sold separately on other systems.

    Stainless steel shim replaces the brass shim used in kits such as the GPM setup.

    Small diameter flywheel allows virtually any spur/clutchbell gearing option available.

    All parts are available separately so when one component wears, the worn component alone can be purchased.

    Absolutely no shimming before the collet is required, the flywheel in this kit is made specifically for the HPI Savage.

    Each piece has been precision made with the Savage in mind. When using with any stock Savage engine, no further shimming should be required.

    Made in the U.S.A.


The installation is pretty straight forward and probably for most does not require any instructions but here are photos from the install I did on my engine with the clutch set donated to me for review by eNVy Racing.

Please note that as with any clutch install, it is good to have a shim kit on hand just in case. As I said before, with the stock engine from any Savage, no further shimming should be required. This kit has been precision machined to be an EXACT fit on any Savage engine and can be shimmed to work perfectly in a Savage with any other engine on the market.

Now, on to the instructions:

1 ) This photo is of the crankshaft with nothing installed.

Image

2 ) First, install the collet included with the flywheel

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3 ) Next, place the flywheel over the collet:

Image

4 ) and install the stock HPI clutch nut.

Image

5 ) Then install the springs onto the shoes. The kit includes three springs, I suggest starting off with 2 springs only. If you desire higher revving capabilities before the clutch engages, install the third (optional) spring. After the springs are installed, place the shoes into the flywheel.

Image

6 ) Place the included stainless steel shim onto the crankshaft after the clutch shoes. Have the beveled edge facing outward. This beveled edge provides support for the inner race of the bearing and this keeps the shoes from sliding in and out and in doing so, keeps the springs seated in place inside the shoes.

Image

7 ) Install the inner clutchbell bearing, clutchbell and outer clutchbell bearing.

Image

8 ) Install the stock HPI brass bushing (HPI86121) onto the crankshaft, install your set screw and you're done.

Image

There should be little to no back and forth play in the clutchbell and the clutchbell should spin freely with no effort. When you set the clutchbell spinning, it should continue to spin for several seconds afterwards.

These installation instructions are for the stock HPI .21BB, S-25 and 4.6 engines with HPI clutchbells only. These instructions can be used as a guide on other engines, clutchbells or combinations thereof as well but every engine may require different shimming. Have an Ofna clutch bell shim OFN10099) kit handy just in case.

Links to the flywheel and complete kit are below. For those who have the GPM kit, all that is required is the flywheel considering your shoes and springs are still in good condition.

Complete kit - http://store.savagess.com/product_info.php?products_id=878

Flywheel, steel shim and collet only - http://store.savagess.com/product_info.php?products_id=879
Last edited by oarie on Tue Feb 22, 2005 9:41 pm, edited 4 times in total.
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Post by CRSMP5 » Mon Feb 21, 2005 8:28 pm

:D sweet i see some nice as *censored* improvements.. :D

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Post by joman2055 » Tue Feb 22, 2005 5:59 pm

I have the XTM Sliding clutch and the stock CB barrely covers the shoes and is almost pushed against the spur. I ausme this problem does not exist with this kit. Also are there or will there be any other shoes avalible besides aluminum? Do you know a relative price?
Thanks for the great post. Looks like envy did a nice job.
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Post by oarie » Tue Feb 22, 2005 8:55 pm

Prices can be seen from the links in my original post. At the time of this post, the kit is $54.99 and the flywheel is $35.
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Post by MountainCat » Tue Feb 22, 2005 8:55 pm

I am thinking this set up is gonna be the thing I want for the new sh 28 I got coming in.... is it? If so where can I get one? can you post a link to the shim kit as well?

Thanks
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Post by oarie » Tue Feb 22, 2005 9:02 pm

The links for everything are in my original post. 8)
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Post by nitro » Wed Mar 02, 2005 9:50 pm

Do the clutch springs lose there tension over time? ( like 1/8 3 shoe) if so can we order replacement springs.
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Post by oarie » Wed Mar 02, 2005 9:57 pm

I had the GPM flywheel originally and my shoes and springs outlasted the flywheel and brass shim that kit came with. I'm still running the original GPM shoes with my eNVy flywheel and shim so I think the springs will hold up fine. The springs are due out soon, along with all of the other components. Every piece of this kit will be available separately. Below are the proposed part numbers:

Springs - SAV1100XSP
Washer - SAV1100XW
Shoes w/ Springs - SAV1215X

These parts are not on the SC Store or Hobby Fever sites yet but will be listed soon. They are available if you call Hobby Fever, they have just not been added to the web sites.
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Post by nitro » Wed Mar 02, 2005 10:00 pm

Thanks! I've been wanting to experiment with an aluminum clutch. I'm going to give eNVy a shot.
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Post by MountainCat » Sun Mar 20, 2005 4:25 pm

Hi Oarie

Got the envy kit installed last night on my sh 28. Using a stock HPI 18 tootth clutch bell. However the clutch bell does cover the shoes completely. There is like 1mm of shoe showing

Image

Any suggestions on how to correct this problem?
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Post by oarie » Mon Mar 21, 2005 11:46 pm

That's not really a problem, it's just that the shoes are longer than the clutch bell you're using is deep. Some bells are slightly longer/shorter than others. The difference is not much, maybe .010 of an inch, and does not need to be compensated for at all. The eNVy Racing clutch will work with most any clutch bell.
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Post by MountainCat » Tue Mar 22, 2005 9:41 am

Thanks for the reply. But wouldn't a groove wear into the shoes where the clutch bell doesn't cover them?

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Post by oarie » Tue Mar 22, 2005 1:14 pm

Possibly, but it wouldn't hurt anything. The shoes will grab the entire depth of the cluchbell eithe way.
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Post by joman2055 » Tue Mar 22, 2005 6:54 pm

If you get an OFNA CB i beive that will solve your problem. SC store has them i think.
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Pro, Reverse, Adjustable upper arms, HPI servo saver, alum drive gear,
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Post by MountainCat » Tue Mar 22, 2005 7:54 pm

Yea I got a set of ofna's coming for it 16, 17, 18 tooth. I do think tho that after extended running I am sure there will be wear into the al clutch shoes and in using the shorter hpi cb's it would the whole shoe wouldn't get worn thus leaving a ridge towards the back of the shoe. I as feel that it should be pointed out in the product description that stock HPI CB's are in fact shorter and links to possible substitutes be inluded.

Just my .02

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Post by oarie » Tue Mar 22, 2005 9:30 pm

I have been running my shoes with the stock 15t Savage 25 clutchbell for several gallons of fuel now. Same stock shoes, still grab great.

You made a good observation but it causes no problems, period.
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Post by Heinz57 » Wed Mar 30, 2005 7:56 pm

MountainCat, Did the OFNa cover the shoes? Did you get the hardened Vented clutch bell?

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Post by MountainCat » Thu Mar 31, 2005 12:07 am

I am currently on the road for the next couple of weeks on business. At the time I left nothing had showed up. I am hoping that all parts I am waiting for will be in when I get back. And yes they were the vented ofan's

once back I have work for a week and then I should be able to get to my trucks..... boy I'm sure they're missing me!!! :(
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Post by Heinz57 » Mon Apr 11, 2005 1:34 pm

This clutch is fantastic. I have all 3 springs in with a 49 17 ratio. The 3rd spring lets the RPM levels rise up into the Power Band of the 4.6. 2 springs the clutch was engaging to early. The Clutch engages well with no slipage. The truck easily wheelies. I highly recommend the clutch.

I do have a suggestion for Envy. Spring options with different tensions.

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Post by Knot » Mon Apr 11, 2005 1:45 pm

This is the only clutch that I have actually enjoyed assembling. No struggling with shoes, tight springs or even shims. It all fits together with perfection. My 4.6 hooks up better than any other clutch I have tried. This includes Mugen, Kyosho and UE Supermaxx variations. Don't even wait, buy it now.

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