FLM combo bulks/advice?
 

Will FLM combo bulks fit 1/8 scale gears. If not should I get the ones that do for my Neu/MGM/4s?

What size gears fit in the UE ultra lite diff? Is this better than the FLM combo for my set up?

Lastly what gears fit the FLM hybrids? Would they be better for me?

FLM combo bulks use standard sise maxx diffs, they just do away with the diffcase and combine it into the bulkheads.

1/8 scale diffs go into the UE Ultralite diff cases- they are the only dif case on the planet that takes 1/8 diffs- they can take the 6 or 8 spider UE diffs or the Hot bodies (HB) 1/8 diffs which are the same size & use the same bearings which are large than normal maxx ones.

The FLM hybrid bulks take 1/8 scale diffs, either the UE 6 or 8 spider diffs or the HB 1/8 scale buggy/truggy diffs. Someone is testing to see if different 1/8 scale diffs will also fit, since they use the same design & bearings in theory, but that is still to be confirmed.

If you are interested, there are a few sets of UE 6 spider Ultralite diffs/cases for sale on feebay at the moment, but prices will reach crazy levels by the end of the auction.....

Thanks for the answer.

That is why I am asking. I was hoping no one would notice. Well lets see if they are worth where the price goes.

Correct me if I'm wrong, I know the UE diffs are 3.31 (43/13) but the HB are geared higher than that, something like 4.11 ??

Reason to point this out, I've seen some last minute wailing when HBs were received expecting same gear ratio only to realize they're geared higher which requires re-gearing elsewhere to maintain same fdr. Nothing like last minutes surprises!

Thanks, I did not know that.

Do you think the FLM will hold up to my truck truck?

I have one set of combo and two sets of hybrid bulks by FLM. The latest flm hybrid bulks fit most 1/8 scale diffs. I run HB and UE diffs in my hybrid bulks...and they both are fantastic.

My combo bulks are on sale at ebay now, but with the set up you are running, I recommend that you go hybrid.

1/8th buggys usually use 43/13 (close to 3.31:1) Same as UE.
1/8th truggys usually use 43/10 (4.3:1)
In the store the buggy diffs say "From Hot Bodies Lightning"
and the truggy diffs say "From Hot Bodies Lightning PRO".
The different ratio is to make up for tire size difference between buggys and truggys.
For a maxx you'll want the Non Pro ones, unless you need the higher ratio for some reason.

mkrusedc, if our going to get the FLM bulks I'd go for the hybrids and 1/8th diffs as well, since with your setup maxx diffs will all ways be a weak point no matter what cases you use. They'll last a while for now, but if your going to make a fairly expensive purchase, like the FLM bulks IMO it would be worth spending a bit more and upgrade the diffs now as well. Plus now that you experienced power, chances are your going to want more of it in the future :yes:, 1/8th diffs will let you do that.
You'll need a bigger pinion though, if the want to keep the FDR that you have now. Probably 2 teeth bigger, but use the calculator to check.

You guys are a wealth of knowledge! Thanks for all the help.

So I need this and 2 of these, right?

$140+$62+$62=$264?

Yep! that will hold the power Neu just fine and take what ever bashing you can throw at it.

Just got my hybrid bulks in the mail, very nice! Beautifully made and well worth the money. Can't wait to get my racebomb together.

Patrick, thanks for detailing which diffs are which, I haven't seen that explained before. I had seen in other forums more than once of the last minute surprise when these were run and the results were less than anticipated speed wise due to the increased truggy gearing.

Now I know which way to go when my modded stock diffs give up under my BL conversion.

No worries. I could understand people's disappointment when they put their flash new expensive diffs in their car, and then it when they test it it's about 25% slower than they were expecting.:cry:

Whilst we're on the subject of diffs, I was bidding on a UE 6 spider kit, but some bloke called 'Procharged5.0' beat me to them..... git :lol:

I don't understand why the used one have gotten so expensive lately. They are still available new (6 & 8 spyder kits) on UE, so its not like they are going away. I bought 3 sets of 6 and 1 set of 8 spyder diffs over the past 2 yrs and never paid more than $150, all in excellent shape. Now I'm seeing buy it now prices that start at $200, whats up with that?

Paying for them assembled (used) cause don't think they can assemble them correctly?

Either that or people who get caught up in the bidding. I have seen plastic RPM parts auctioned at prices higher than retail:surprised:.

While we are on the subject of the hybrid diffs, where can i get shims to alter the pinion depth? They are 8mm id, not sure how big the od would be?

Would the larger shims in this work?

http://www2.towerhobbies.com/cgi-bin...?&I=LXJVD0&P=7

Thse are what you want:
http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXGPC9

Thanks SSSp.

BTW, if you send one of those FLM tranny halves and $8 back to Jaime (FLM), he will probably send you the half you need. He has done it for me...

Thanks again, any idea how I can get in touch with Jaime? I used the FLM store contact and a lady replied that they were wholesale only and to contact RCM.

did you try info@fastlanemachine.com ? i did have an email from jamie, but can't seem to find it now. maybe it's jamie at fastlanemachine.com? the info one is from the FLM website.

On the subject of UE parts selling for silly prices, I think alot of it is down to them usually being out of stock alot of the time (panic buying?), plus us UK truckers cant order directly from UE so we end up paying extra to get them else where. I definately would rather have UE diffs that I can just drop-in to my FLM bulks; I dont want to buy whole new hybrid bulks & 1/8 diffs and have to sell my existing FLm bulks- to mauch hassle & I know Im lazy.....