JRC Direct Drive Units

[Mike Jeffery]

We just finished manufacturing the first batch of the new JRC direct Drive units. They will be on sale at the Open Wheel race in NC this week. As for the customers that pre ordered them feel free to give me a call as I won't be able to answer your emails. Here are some of the long awaited pictures. These are a direct bolt on kit w/ some very minor modifications such as:

(1) - You will need to drill (1) #33 hole in the chassis plate
(2) - You will need to drill out your Rear A-Arm mounts w/ a #33 drill
(3) - You will need to cut a small slot in the chassis for the Spur gear

That is all that needs to be done. If you want to switch back to a transmission these mods. will not intfere w/ that change(so you can swap back and forth w/ out any problems).


Thanks,
Mike Jeffery

[siggy99x]

You got a pm

[jeff@vinyltrix]

mike how much are they?? when will the next batch be done im interested in a set...

[BustedGFX]

Mike, thats a pretty cool idea. to be able to go from DD to gearbox w/out major mods or changing the chassis is real cool, nice job:thumbsup:

[curtisp]

Looks good Mike!!! You have a pm.

[MRDmotorsports]

Nice looking piece mike. I ran a direct drive terminator and made the b-main in mod at the next to last USOWC when it was at Coopers, Mine was scratch built with some extra graphite, but your unit looks top noth and should be very good for those looking to loose some weight where it counts the most, in the drivetrain.....

[Dragula]

Seen this up close in one of his sprint cars at Redneck, very impressive and fast.

[irocz69]

Mike the DD unit works great. U might want to post other pics though. the ones u have on hear are blurry. Keith S.

[mizeracing]

Did anyone use these @ the Open Wheel?

[irocz69]

Did anyone use these @ the Open Wheel?
Yes, I did & I must tell ya it is a very impressive unit. I was one of the only ones on a 42 lap pace in the first round w/it & was taken out by a back marker going down the backstraight. Should of been TQ but hey thats the way things go. Anyone buyin this unit from Mike "WILL NOT" be disappointed ! GO FAST TURN LEFT ! Keith Steinle. TQ would of been in 13.5 Sprint since no one went faster than 41 4:01 I believe.

[jeff@vinyltrix]

Yes, I did & I must tell ya it is a very impressive unit. I was one of the only ones on a 42 lap pace in the first round w/it & was taken out by a back marker going down the backstraight. Should of been TQ but hey thats the way things go. Anyone buyin this unit from Mike "WILL NOT" be disappointed ! GO FAST TURN LEFT ! Keith Steinle. TQ would of been in 13.5 Sprint since no one went faster than 41 4:01 I believe.


what was the cost?? still waiting on an answer ...

[irocz69]

what was the cost?? still waiting on an answer ...
Jeff,not sure on what the cost is, but im sure Mike will post that soon. I know he was feeling a bit under the weather @ the OW race & sure whatever the cost it will be reasonable & believe me worth every cent ! GO FAST TURN LEFT ! Keith Steinle

[terry14]

jeff, i talked to mike yesterday and he is still very sick. he will post soon. i am sure.

[TonyProCar]

Did anyone use these @ the Open Wheel?
Yes Nick Deangelis and Phil Cooper did back in 2002 at the open wheel race.:ha::ha::ha:

[Dragula]

:thumbsup: Best pic I have of it installed, but not in my car. Courtesey of Steve 'O'.

[sarbubzim1127]

DD unit installed on my JRC car:checkeredflag:




24473

24474

24475

24476

[latemodel13]

Looks good. Does it use an associated diff ?

[Dragula]

Yes.

[curtisp]

Looks good. Does it use an associated diff ?

I know that when Mike was designing it his plan was to be able to use the diff out of either the 2.4 or 2.6 Associated tranny.

[kfisher27]

Looks like a diff out of 2.25 stealth.Thats a real new idea....hahahahaha

[Harris03]

Ran The JRC 2009 DD, tonight at Radio Hill.

This setup is awesome. Car ran Fast and Free! I love it!

Smoothest car I have ever ran there. The changes in rear weight distribution made the car very smooth around those tight turns.

Call Mike Jeffery and get a set!!!

[sunfish112]

How much are these and will the 2009 JRC series be using these??

[irocz69]

MERRY X-MAS & HAPPY HOLIDAYS to ALL on the JRC team. Everybody be safe ! GO FAST TURN LEFT ! Keith S.

[curtisp]

Merry Christmas to everyone! Have a safe and happy holiday!

I'm looking forward to my Christmas present to myself...a new direct drive EDM!!! :thumbsup:

[Dragula]

Ran The JRC 2009 DD, tonight at Radio Hill.

This setup is awesome. Car ran Fast and Free! I love it!

Smoothest car I have ever ran there. The changes in rear weight distribution made the car very smooth around those tight turns.

Call Mike Jeffery and get a set!!!



I still won though....

[dirty one]

HAPPY HOLIDAY TO ALL IN THE JRC TEAM. MIKE LOOKING FOR THAT SPRINIT CAR. WE NEED TO HAVE IT DONE ASAP. JRC ALL THE WAY. JRC OPEN WHEEL CAMP.:checkeredflag::thumbsup:


DIRTY ONE

[irocz69]

HAPPY HOLIDAY TO ALL IN THE JRC TEAM. MIKE LOOKING FOR THAT SPRINIT CAR. WE NEED TO HAVE IT DONE ASAP. JRC ALL THE WAY. JRC OPEN WHEEL CAMP.:checkeredflag::thumbsup:


DIRTY ONE
Hey Dale, i'm being told it should be done by the Freeze. Lets keep or fingers crossed. Think i'd like to run limited class w/it. GO FAST TURN LEFT ! Keith S.

[Dragula]

You know, if you want a good picture that isn't fuzzy, you have to do things yourself...Here's a little better pic I took of Steve's car with the conversion in it.

[dirty one]

Hey Dale, i'm being told it should be done by the Freeze. Lets keep or fingers crossed. Think i'd like to run limited class w/it. GO FAST TURN LEFT ! Keith S.

thats what i was thinking too. i can run limited there.going to bumps on the 3rd to run.
hope to see you there.



dirty one

[irocz69]

thats what i was thinking too. i can run limited there.going to bumps on the 3rd to run.
hope to see you there.



dirty oneHave to p/u girlfriend @ JFK on Saturday, but will be there following week, hopefully w/new DD in electric EDM. Good luck. Im also going to try n get the gas EDM ready.

[RobRacer]

So what kinds of classes will these be legal for? I recall that the DODC EDM rules will only allow a gearbox transmission. So then it is only good for MOD or for tracks that have no tranny rule for EDMs? Am I missing something?

[siggy99x]

So what kinds of classes will these be legal for? I recall that the DODC EDM rules will only allow a gearbox transmission. So then it is only good for MOD or for tracks that have no tranny rule for EDMs? Am I missing something?

Thats false they are legal for all electric classes per the DODC rules

[irocz69]

Thats false they are legal for all electric classes per the DODC rules
That is correct Lauden. The DD unit has "NEVER" been illegal for "ANY" electric class. People just got away from them because manufacturers weren't including them in their kits, since the gearbox became just as fast. I personally believe w/the technology of the motors & batteries today that DD will be making a comeback. Less drag & friction on the drivetrain ,therefore, if setup is right ,you should be able to p/u a 1/10 or 2 ! Keep in mind DD is "NOT" for everyone, but Mike @ JRC has made a very nice unit that can be easily changed from gearbox to DD & back again if not satisfied. Just food for thought gentelman ! GO FAST TURN LEFT ! Keith Steinle

[RobRacer]

Keith - why do you say that DD is not for everyone?

[jeff@vinyltrix]

All 2WD Classes: All entries must be 2wd and rear wheel drive only. For turn marshal safety all cars must have a front bumper that is made of a shock absorbing material e.g. nylon, delrin, plastic, kydex etc. Front bumpers must be mounted in such a way that they will contact an object prior to any other portion of the car in a front impact. All cars must have 4-wheel independent suspension. No straight axle cars allowed, single speed transmissions only.

PER DODC RULES.

[racerjmh]

A DD only has one speed. And it is a transmission.

[curtisp]

A DD only has one speed. And it is a transmission.

yep...what he said. :D

[irocz69]

Keith - why do you say that DD is not for everyone?
DD drives different than a gearbox. Going in & coming off the turns. Especially coming off. Requires different setup w/ oils & or springs. I know some people that it just doesn't fit there style of driving. Some of the racers nowadays have never seen , let alone driven a DD. Thats just my opinion. HAPPY NEW YEAR ! Keith S.

[jeff@vinyltrix]

i only quoted what the rules stated. but if you really wanted to get technical about it they are not the same. DD is just that direct drive pinion to spur. A transmission (gearbox) has 2 more gears . top shaft and idler. totally different. but my outlook on it if it was allowed to run at the open wheel must mean it makes dirtoval.com specs and rules its allowed.

[irocz69]

i only quoted what the rules stated. but if you really wanted to get technical about it they are not the same. DD is just that direct drive pinion to spur. A transmission (gearbox) has 2 more gears . top shaft and idler. totally different. but my outlook on it if it was allowed to run at the open wheel must mean it makes dirtoval.com specs and rules its allowed.
Jeff, you are correct that the rules state a single speed trans., but no where in the rules does it say that you can not run a DD. DD uses a differential & pinion which still makes it one speed. Sometimes people read only what's in the rules & don't think about what's not ! Just some food for thought, but before I ran the DD unit in my sprinter @ the OW race I called Rob & confirmed that it was legal. GO FAST TURN LEFT ! Keith Steinle HAPPY NEW YEAR EVERYONE !

[JimmyD]

1. All entries must be 2wd / rear wheel drive only. All cars must have a gearbox with a minimum of 3 gear reductions, including the spur and pinion.






Jeff you are not crazy... Above was quoted from Wally's WDRA rulebook 2008

[jeff@vinyltrix]

they also posted when the rules came out that if you dont see it in the rules it probably isnt legal! LMAO but again read that last sentence of my statement:

if it was allowed to run at the open wheel must mean it makes dirtoval.com specs and rules its allowed.

[JimmyD]

Change em (rules that is) as we go... Whatever...LOL :D

Happy New Year.....

[siggy99x]

1. All entries must be 2wd / rear wheel drive only. All cars must have a gearbox with a minimum of 3 gear reductions, including the spur and pinion.






Jeff you are not crazy... Above was quoted from Wally's WDRA rulebook 2008






Thats the WDRA New York rules not the openwheel or Pa rules

[JimmyD]

I know , I know, but I was stating to Jeff, that I know what he is saying about this rule. Never really payed attn.to the DODC stuff before, It really dont matter to me, I dont care if you use DD or not... I dont care if you race the WDRA or not...

[Bulldog_Wally14]

1. All entries must be 2wd / rear wheel drive only. All cars must have a gearbox with a minimum of 3 gear reductions, including the spur and pinion.






Jeff you are not crazy... Above was quoted from Wally's WDRA rulebook 2008






The 2009 rules should be up sometime next week. DODC rules will apply w/ some concessions for a motor/battery phase-in period.

[JimmyD]

Cool... Thanks Wally

[irocz69]

The 2009 rules should be up sometime next week. DODC rules will apply w/ some concessions for a motor/battery phase-in period.
Wally, that's good news. Rules that comply w/dodc are good for the hobby, but @ least your looking @ phasing in or allowences for motors & batteries. I had fun @ the Summernationals last year & look forward to going this year & maybe some other races on the WDRA tour. HAPPY NEW YEAR ! GO FAST TURN LEFT ! Keith Steinle

[siggy99x]

Wally, that's good news. Rules that comply w/dodc are good for the hobby, but @ least your looking @ phasing in or allowences for motors & batteries. I had fun @ the Summernationals last year & look forward to going this year & maybe some other races on the WDRA tour. HAPPY NEW YEAR ! GO FAST TURN LEFT ! Keith Steinle
Kieth I would go with you as long as the daughter does not have a 1/4 midget race.

[teopro27]

Just something else to spend money on...give it a few races and everyone will need one to be competitive....:mad:

[irocz69]

Just something else to spend money on...give it a few races and everyone will need one to be competitive....:mad:
That very well could be, but that doesn't mean that's a bad thing. Why is it when something new comes out its all about cost & not the competitive advantage it could bring. FYI, in 25yrs of racing I have gone through more spurs & rebuilds w/a gearbox than I have w/a DD. Don't get me wrong, I run both & have seen gearbox evolve over the years. I guess it's just a prefference to what you want to use. I think Mike Jeffery has machined an "AWESOME" unit to bring back DD @ an affordable cost. Again this is just my 2cents. GO FAST TURN LEFT ! Keith S.

[jeff@vinyltrix]

hey keith,
since you seem to be the only spokes person or the only person who answers questions for JRC WHO won the sprint car for the dirt series giveaway???

[Mike Jeffery]

Jeff-
I know that this has really been on the top of your To Do list, but unfortunately I've had some health issues this past month and I'm just starting to feel OK. I will draw the winner @ the first JRC Sprint Car Series race & Mr. Dirt R/C race on Jan. 17th, so I hope that you will be able to attend.
Thanks for the concern,
Mike Jeffery

[markny]

Great ,another race i wont be piloting a jrc sprinter. i

[irocz69]

Jeff-
I know that this has really been on the top of your To Do list, but unfortunately I've had some health issues this past month and I'm just starting to feel OK. I will draw the winner @ the first JRC Sprint Car Series race & Mr. Dirt R/C race on Jan. 17th, so I hope that you will be able to attend.
Thanks for the concern,
Mike Jeffery
"YEAH" what he said !

[jeff@vinyltrix]

Jeff-
I know that this has really been on the top of your To Do list, but unfortunately I've had some health issues this past month and I'm just starting to feel OK. I will draw the winner @ the first JRC Sprint Car Series race & Mr. Dirt R/C race on Jan. 17th, so I hope that you will be able to attend.
Thanks for the concern,
Mike Jeffery

well no actually mike i just gave up on the several emails and phone messages
left for you on getting a sprint, and seeing he was the only was answering anything i thought
i would ask him.. and ill be at the duel in the dungeon race on the 17th.

[Mike Jeffery]

I never received any emails or phone calls from you Jeff. My # is 1-716-998-7255 and my email is mjeffery@localnet.com, feel free to call me,
Thanks,
Mike

well no actually mike i just gave up on the several emails and phone messages
left for you on getting a sprint, and seeing he was the only was answering anything i thought
i would ask him.. and ill be at the duel in the dungeon race on the 17th.

[sarbubzim1127]

http://www.dirtoval.com/forums/images/icons/icon1.gif great
Great ,another race i wont be piloting a jrc sprinter. i

Mike sells them.

[jeff@vinyltrix]

I never received any emails or phone calls from you Jeff. My # is 1-716-998-7255 and my email is mjeffery@localnet.com, feel free to call me,
Thanks,
Mike

sent you an email earlier today mike..

[markny]

bub i have three tickets in that raffle.i dont want to jump the gun .http://www.dirtoval.com/forums/images/icons/icon1.gif great
Great ,another race i wont be piloting a jrc sprinter. i

Mike sells them.

[rj14]

Keith,

What is the average re-build cycle for the DD units, taking into consideration the PA tracks like Staubs, and Bumps. Bumps of course having the obvious lower cycle.

rj

[matt_s86]

Jeff-
I will draw the winner @ the first JRC Sprint Car Series race & Mr. Dirt R/C race on Jan. 17th, so I hope that you will be able to attend.
Thanks for the concern,
Mike Jeffery

Are the sprints running wings at this event or not?

[cnyrcer]

Are the sprints running wings at this event or not?

rc motorsports group and the mr dirt rc series presents the mr dirt rc winter rug run. the race will be held at the rc car club of monroe county.

the classes
big block edm
small block edm
wingless sprint cars (because of the race being on carpet)
plus the monroe county classes
prostock pan car
stock pan car


all classes will have a single car time trials to set up heats.

race will be january 17. 2009 doors open at 9 am racing at noon. the address is east ridge rd. rochester, ny 14621

this is the flyer that was put out..says non-wing

[irocz69]

Keith,

What is the average re-build cycle for the DD units, taking into consideration the PA tracks like Staubs, and Bumps. Bumps of course having the obvious lower cycle.

rj
In my opinion, & experence, if you use a good diff grease it should last quite a few races. Of cource the diff balls play an important roll in the life of a good diff. Ceramic balls are the best to use & will give you more races before having to rebuild. I have gone 6-8 races w/out a rebuild. Exception would be if your running mod motors, which are harder on diffs, then you might have to rebuild every 4-6 races. Hope this helps. GO FAST TURN LEFT ! Keith S.

[rj14]

In my opinion, & experence, if you use a good diff grease it should last quite a few races. Of cource the diff balls play an important roll in the life of a good diff. Ceramic balls are the best to use & will give you more races before having to rebuild. I have gone 6-8 races w/out a rebuild. Exception would be if your running mod motors, which are harder on diffs, then you might have to rebuild every 4-6 races. Hope this helps. GO FAST TURN LEFT ! Keith S.

Thanks Keith,

I wasn't sure, for some reason I was thinking every 2-3. My step-dad is looking @ one of Mikes set-ups with the DD w/ the 6.5 PA Tour deal. So I wanted to throw it out there so we could know what to expect.

rj

[curtisp]

I'm planning to build my DD this weekend. Any things to keep in mind as I build it? Anyone have any good base set-ups for it? Or...just set it up similar to my gearbox JRC EDM?

thanks,
Curt
curtisp24@mchsi.com

[sarbubzim1127]

I am running my DD with the same set up as my gear box. You may need to soften RF to compensate for the weight on the LR. I have been racing Radio Hill with a JRC with DD the car has been really fast /Bad luck dosnt help. I love my DD set up so far.I can not wait to get it outside.:checkeredflag::checkeredflag::checkeredfl ag:

[freeloader Rob]

That's not called bad luck Bub. We call that "small block"

[Dragula]

That's not called bad luck Bub. We call that "small block"

Its called 'bad luck' in 'small block'.....Its my car he argued with!

[irocz69]

Well, let me tell ya ! I just practiced w/the new DD in my 13.5 EDM & the car was awesome. Very fast & on a rail. I also TQ'ed Sprint 13.5 & won A main @ Bumps & Jumps where the Freeze is going to be held. If not for a little altercation in main I could of gone 53 laps, but I went 52 & I believe that is the most laps turned in a Sprinter @ Bumps. OH, I almost forgot to mention the Sprinter is a DD also. Thanks again Mike for all you do & i'll keep you posted on the progress w/the EDM, which if all goes well I will be running next week. GO FAST TURN LEFT ! Keith S.

[curtisp]

Well, let me tell ya ! I just practiced w/the new DD in my 13.5 EDM & the car was awesome. Very fast & on a rail. I also TQ'ed Sprint 13.5 & won A main @ Bumps & Jumps where the Freeze is going to be held. If not for a little altercation in main I could of gone 53 laps, but I went 52 & I believe that is the most laps turned in a Sprinter @ Bumps. OH, I almost forgot to mention the Sprinter is a DD also. Thanks again Mike for all you do & i'll keep you posted on the progress w/the EDM, which if all goes well I will be running next week. GO FAST TURN LEFT ! Keith S.

Way to go Keith!!! :thumbsup::thumbsup:

I'm looking forward to getting my DD cars on the track soon.

[sunfish112]

hey keith,
since you seem to be the only spokes person or the only person who answers questions for JRC WHO won the sprint car for the dirt series giveaway???


I heard that Joe Sovie won it. :checkeredflag::trophy: Congrats Joe:thumbsup::beer:

[sawoff]

yes i did and thank you to mike for putting on a great race for us and everyone else that makes it happen :thumbsup::checkeredflag::trophy_bronze:

[savageguy81]

Its called 'bad luck' in 'small block'.....Its my car he argued with!
haha iv argued with your car once.....i lost lol cant wait to get my dd kit.... :thumbsup:

[NatureBoy]

Here is a clear shot of the JRC Direct Drive conversion with the top plate configured for sprint cars. Had to pull down my first pictures. Had too small of a pinion. With too small of a pinion the motor will hit the LR Arm and limit the uptravel on the arm. I'll repost pictures tomorrow. Have a 128 x 35 on mine now and the left rear arm has 0.600" up-travel clearance which should be plenty for most smooth tracks. :thumbsup:

http://rc4less.com/images/Direct%20Drive128x35.jpg

[tattoomike123]

How much are they and where do I get one......

[Dragula]

Call or PM Mike Jeffery. They are about $100, and require only a couple of simple mods to install in your car. I am pretty sure he will have some at this weekends WDRA race at Radio Hill....

[Crash#15]

Call or PM Mike Jeffery. They are about $100, and require only a couple of simple mods to install in your car. I am pretty sure he will have some at this weekends WDRA race at Radio Hill....

ya randy they are a very nice unit, very well done... easy to install... deffinatly worth getting one:thumbsup:

[curtisp]

ya randy they are a very nice unit, very well done... easy to install... deffinatly worth getting one:thumbsup:


ya...what he said! :D

I've had one for a while now and finally was able to race it last weekend. Mine is in a JRC EDM, that I run in the 17.5 class at Brinks Speedway. I had no idea what to do for set-up...I had heard that direct drive and gearbox cars were completely different! But, I set it up the same as my gearbox car, and it ran great! :thumbsup::thumbsup:

[sarbubzim1127]

I also run the same set up on my JRC edm car with the gear box or DD.

[savageguy81]

how derastic did you guys change springs in the rear of your car from gear box to dd?

[curtisp]

how derastic did you guys change springs in the rear of your car from gear box to dd?

...I had heard that direct drive and gearbox cars were completely different! But, I set it up the same as my gearbox car, and it ran great! :thumbsup::thumbsup:

Seriously...my DD EDM & my Gearbox EDM have the same springs and shock oil.

[Dragula]

Switching from a GB to DD usually tightens the car up due to less rear weight and mass.

[sarbubzim1127]

Mine also same springs and oil.

[savageguy81]

thanks guys.

[ChrisHarrington]

Switching from a GB to DD usually tightens the car up due to less rear weight and mass.

i would think that the weight differnece would be minimal between the gb and dd. the most dramatic part is moving the motor from the center of the car over to the left rear, that is why they are usually tighter.

[savageguy81]

yea. well wasnt sure and wanted some advice with it.

[signman501]

If it is a mid drive car all your doing is moving the motor more to the left. It will give more left side balance. From what I have seen the DD is most likely about the same weight as a GB. And if is lighter you will have to add weight to be legal.

[Mike Jeffery]

Yes, at the Freeze this year we had to add just over 4 oz. to make up the difference of the DD unit versus the Transmission. Also the DD unit gives the car more Static left side weight due to the motor position, this should work very well on tracks that have a loose off the turns condition.
Mike

[NatureBoy]

The JRC Direct Drive sprinter unit won another race at Mize's RC Speedway in Blythe, GA. TQ in round 3 with a very loose car and won the main with a new track record for 13.5 Sprint Cars, barely taking a second off the old record and just edging CJ Mize for a close win. The car had two missing teeth on the spur gear from the 2 min mark on. Sounded awful but still finished. The combination of the direct drive and Kipps wing had me adding an ounce and half to make weight.

If your ever in east GA (near Augusta) check out this track! 190' of super smooth GA red clay.

BT

[curtisp]

The JRC Direct Drive sprinter unit won another race at Mize's RC Speedway in Blythe, GA. TQ in round 3 with a very loose car and won the main with a new track record for 13.5 Sprint Cars, barely taking a second off the old record and just edging CJ Mize for a close win. The car had two missing teeth on the spur gear from the 2 min mark on. Sounded awful but still finished. The combination of the direct drive and Kipps wing had me adding an ounce and half to make weight.

If your ever in east GA (near Augusta) check out this track! 190' of super smooth GA red clay.

BT

Congrats on your good run!!! Keep it up!!! :thumbsup::thumbsup:

[Mike Jeffery]

Great job Bruce another track record falls to the way side, the JRC Direct Drive System has been Breaking track record all over the place, thanks to all the drivers who have purchased and installed them in their DO cars. We are going to try them on carpet this weekend.
Thanks,
Mike