Lizardking
Senior Member
- Messages
- 198
- Location
- Ashland, Pa
any video of the 30.5 in action?
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I couldn't agree more Moo. Rob has been nothing but helpful especially with the diff cups that I have broken. Redcat racing support were pretty quick to respond and think VERY highly of Rob and Rampage Hop Ups. I think that should be a feather in his cap after they told me that Rob would have more thoghts on solving the problem and alternative parts that may work (yes Redcat Racing Support deferred to Rob, that is quite a compliment in my book!). The minor breaks and issues are like everyone said. Every RC out there has a few bugs, this just happens to be the Ramp's. In all honesty I would rather have to replace a diff cup vs drive pins. I had a similar issue when my LST2 was new. It kept snapping drive pins in the tranny. A very big PITA that was solved with a piece of coat hanger that is still there and working beautifully after a year of abuse. I think it is a good thing that these mechanical failures are talked about openly not to scare away noobs but to get other ideas for a fix. I am still debating whether or not to have some diff cups milled out of titanium. I found titanium round stock and am waiting on my buddy's dad (he's a machinist) to get the time to do it. I am still considering 4140 steel as well. Regardless my tempered cups are still holding up and I have 6 spares if they fail.mooman007uk said:Guys just to let it be known I am not bashing the rampage diffs.....if we don't talk about it and then try and fix whatever may be wrong then we will scare people off.
It's R & D...hell FG still sell their cars with the shit plastic rear diff housing...it's an item that needs replacing before you run it and they're sneaky and sell it after market and don't fit it as standard equipment. been like that for 15yrs.
Everything has it's weaknesses, however i don't believe now it's big motors or diff lube causing the rampage problem, I'll know more shortly after another attempt to break the cups I tempered, i whacked every wheel prior to breakage where it was brought to a sudden stop from speeed, throttle on landings will be a good cause too.
The truck is more prone than the buggy it seems cos of the big tires but the rest of the truck is now near bulletproof with a few mods....I don't think it'll be long before this current minor problem is fixed, no other seller/manufacturer comes close to supporting their customers like redcat, they have addressed every issue because we talk about it openly, they see and they do do fixing pretty damn quick.
My hat goes off to redcat and rampage hopups for their ongoing customer support and for building a great truck.
Hey Moo, I am running the 8000 HPI. I just did the clutch reversal to lower the clutch engage point. I did the same thing to my 5B SS to make the take offs a little more controllable.mooman007uk said:just changed 8000 hpi for 7500 ddm much less snappy take off.
You give me to much credit Moo I am a aircraft mechanic not an engineer, Although I do agree with you fully the 4140 steel would be better than the titanium for this application, Heat treating the ones we got may help as you said.mooman007uk said:I don't think titanium it the right material in a drivetrain, it isn't as strong in that application as a hardened alloy steel and will probably stretch and fracture. pound for pound titanium is stronger but size for size in high stress drivetrain appplication it isn't...sprint should be able to give us the skinny as he's an aircraft engineer.
I believe the dimensions of the existing cups is fine just the metallurgy needs a slight tweak is all. A high alloy steel like 4140 hardened and tempered correctly will probably work but just a different temper on the existing ones may be all that's required.
the ddm is still up there in rpm but just seems way smoother
Hey Rob, Count me in. So far my Dremeled tempered cups are holding up. I'd like to be a guinea pig! I'd be curious to see if the fix works! I think it will!RampageHopUps said:I will be taking 10 sets over to a heat treater on Tuesday, and we can see if a new hardenss specification will fix the problem for good.
If anyone wants samples, let me know. You have to be an active member with at least 100 posts.
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