Ofna Hyper 8 Pro HAS ARRIVED
 

Well guys, I finally broke down and bought a good 1/8 buggy. After owning my X-Terminator for a couple years, I can say that it doesn't seem up to the task of handling well at the local track (last time it only lasted a lap or two when the front endbell on the 540C 9L decided to come loose, stripping the spur gear).

Yesterday I cashed in four (yes, 4) paychecks, totalling something like $650. I put 50% into my savings account, and was still left with $325. From my boss at work I bought a Proline Revo aluminum steering arm and a Hitec 5955 (titanium gear 330 oz./in. servo) both brand new for $80. Then I sold my TC4 for $60, so I was still left with $300.

So, with my extra cash, I knew I had to get something good, and after reading a bit about the Hyper 8 Pro, the only major problem I read about was the fuel tank breaking a lot. But hey, that's not a problem with electrics. I had been watching a Hyper 8 Pro (used several times) on Ebay, and it had a Buy-it-Now price of $250 (the kit costs $410). Here's a link:
http://cgi.ebay.com/hyper-8-hyper8-p...em300083793778
The seller is fairly local, so it shouldn't take more than a day or two for it to get here after it is shipped.

I'll be doing a different setup with this than BrianG has with his. The motor will be in the rear, laying pretty much flat on the chassis. So far I'm looking at the Feigao 540C 8XL since I've had good luck with the 540C 7XL in my Revo (it has yet to exceed 140 deg). The battery will be a single pack, a Maxamps 4s1p 5000mah pack. It'll use a Mamba Max ESC. Overall, this should be a very light weight conversion, and the chassis should be balanced (left and right) with the motor/ESC on one side and the battery/servo on the other.

Sounds great. Should be a great conversion. Will you be selling your xterminator? Just wondering.

BTW - You may want to add it to your singature... although you may not have room for any more letters. :005: Maybe give some away to free up the room in your signature. :027:

Hi Metalman,

Way to go ! Hyper 8 does look very nice & capable indeed. Don't forget to post build pics & videos.

Regards,
Joe Ling

It was already in my signature :p. I took out the TC4 line since it's gone :018:.
If there's a buyer for the X-Terminator, then I'll sell it.

Pics and vids will be here when the time comes :004:.

Oops, just saw it there. How do you have room for all those, lol.

MM,

Coupla questions for ya:

1. If the 7XL works great in something much heavier like the revo, why are you going go to a lower KV motor like the 8XL for the buggy? Seems to me that you'd want to go the other direction?

2. With the 8XL and 4S you are going to be at 30843 rpm. I've heard that the "sweet spot" for Feigao's is 35K rpm. Is this a problem, or not really?

I'm not taking issue with any of your choices, I'm just always trying to learn more. :)

Sleebus

Good luck MM, I'm sure you'll love it. The Hyper 8 is sooo purrrty. :) Now that mine is done, I almost don't want to use it. lol. But, it would be an expensive shelf queen...

Hi Sleebus.jones,

I think the gear ratio for the revo is higher compared to a buggy. So the 7XL motor or esc will not be as stressed in the revo as in a buggy. This in turn means one can use a slightly hotter motor with higher amp draw in a revo.

My personal experience is driving to the direction of 5S & 8XL on 13/46 gearing. 7XL on 5S on 13/50 gearing for my buggy is marginal.

Someone correct me if I'm wrong.:o

Regards,
Joe Ling

MetalMan, you might want to take a look at that sellers other listings... it looks like he's got that same buggy you just got for 250buy it now listed up for sale.

If it's not the same buggy, he certainly used the same pictures and a very similar description.

Just figured I'd give you a heads up!

**Edit, it looks like he claims to have 2 for sale... Why he used the same pictures is beyond me**

I don't. Which is why I'm offering to sell my MT2 and X-Terminator :018:.

Sleebus,
1. glassdoctor seems to have had good luck with a sub-2000kv motor in his 1/8 buggy(s). I could go with a 7XL, but would prefer to use a less "hot" motor. But now that I think about it, I could get away with using the 14t pinion I already have laying around as well as a 44t spur with the 7XL... You may have just changed my mind...

2. I don't think lower RPMs is an issue for Feigao motors. Some guys run as low as 25,000 RPM, and simply gear up to get more speed (without adverse effects).

I'm hoping to make my as inexpensive as possible. Ask me by PM if you want to know how it's being done :018:.

In the Revo, I had to use the 7XL due to limited gearing options. It has a "slipperential" (my own version), where the transmission ratio is 2.44, voltage is 16.5v nominal, and the largest pinion Mike sells is a 20t. With it I can't go lower than a 40t spur because otherwise the motor will not fit properly.

Yeah, weird situation. It seems strange that pics for two different buggies can look so similiar :005:. I chose the one which he said had a fewer number of races on it. Afterwards, I determined it would have been better to get the other one because of spare parts and a clear body. Oh well.

LOL, you have connections eh? After seeing how nice the buggy was when I got it, I knew I wasn't going to put anything but the best in it. I could've saved a ton on cash and went with an ebay kit and then XL motor and MM, but I'm happy! :)

The only thing I might change is to put a MMM in it instead (if it ever comes out) simply because I'm still not quite satisfied with the Quark layout. We'll see I guess...

Unfortunately I can't afford to put "the best" in it. But this buggy will end up being a testing platform for the MMM :).

LOL, I couldn't afford it either. Anyone want to buy one of the kids? :)

Yikes, be careful trusting me! :) I was just wondering, haha. I was thinking 7XL for my Hyper with 4S and 8XL for it if I was going to run 5S. I'm running a 10L right now and it does pretty good (i've got some vids posted around here somewhere) but I think the 7XL is calling to me. If I had a ESC that would handle 5S without blowing up, I'd go 8XL. That sounds pretty beastly to me. :028:

Sleeb

For what it's worth I am running a 9xl on 6s a123 in my hyper 7 and it is INSANE! I am running 12/44 gearing and it is a lot faster than I thought it would be.

I think your definition of insanity might differ from mine. :) From a quick run of the numbers, you probably have a solid 36 - 38 mph machine there. Quick, yes, but not what I'd consider insane. For that, you have to be pushing 50 - 60 mph. My 10L is running (my guess) right at 40 mph. I need to shoot it with the radar gun.

Personally, I think you're a bit undergeared. Slap a 14T pinion on there and see how that feels. You should be close to 45 mph then. Borderline insanity!

Sleeb

I was mainly speaking too the use of a less "hot" motor than the 7xl and that I am using a 9xl successfully, but let me clarify, it's acceleration is insane. It's top speed is very respectable. I wanted lower gearing because my batts are 2300mah. I am getting a 14t pinion though. 50-60 is almost too much speed to be useful. I am very happy with this setup.

I have been using 5s2p A123 in my X-Terminator, but I'm looking for a lighter weight setup. Which is why I chose the Maxamps 4s1p 5000mah pack. It's only a bit heavier than a 6cell NiMh pack :).

Ah yes. I can definitely see how your acceleration would be off the chart! :027: I think you'll be pleased with the 14T.


That's why I call it insane. :005: :028:

Sleeb

The seller somehow messed up and sent the package to South Carolina and Paypal clearly had my address as in California. The bad thing about this is that I would get the package about 2 days after he ships it since he is also in California.

This buggy will be using the 540C 7XL from my Revo (on a Maxamps 4s1p 5000mah pack), and then my Revo will get a smooth-can 8XL. Gearing for the Hyper 8 will be 14/44, with a standard 43/13 diff ratio. The speed estimated using BrianG's calculator is about 38mph, which should be perfect for the track where this buggy will be running.

How does he know he'll even be able to get the buggy back to you if it's being delivered to someone in SC?

Good question. I live in Huntington Beach, and there is a Huntington Beach State Park in South Carolina... Although my street does not exist in that city, and assuming he put down the correct zip code, I don't know how it could even end up there.

He said if he doesn't get it back he will refund my money. And when (assuming) he does get it back, he'll send some extra parts that he was going to sell locally.

Oh no, I can see this getting ugly. I hope it works out for you...

If it doesn't work out, Paypal does have a buyer protection thingy... And it's through Ebay (where the seller has pretty much no negative feedbacks) so Ebay can also take action if necessary.

That's good. With so many scams out there, it's hard not to get jaded.

If the destination does not exist, it is returned to the shipper.

Hope it works out MM!

Yes, but, what if he accidentally sent it to a real address...like for someone else he had a recent transaction with or something like that? That's always a possibility.

I beleive MetalMan said his street name did not exist in the Huntington Beach in SC.

Edit: Yup, post 23.

Yes, but that doesn't matter if the guy completely addressed the package incorrectly. You're assuming that the sender addressed the package to MetalMan, with the minor exception of the City and State. Not only that, but MetalMan himself only stated that there is a Huntington Beach State Park in SC, but not that the guy actually addressed it to there.

I've bought and sold quite a number of items on eBay and it's easy enough to mess up an entire address, but to only screw up the city and state? I highly doubt that.

That is really too bad MM. Hopefully everything works out for you.

MetalMan,

Although I'd be PO'd about not getting my buggy, I don't think that there is need to worry about getting ripped off, yet. I doubt that the guy purposely sent the package to a non existent address. The only thing that I can see, assuming the worse, is that he purposely sent an empty package to the wrong address, just so that he's have something to track. On the upside, Paypal is very serious about their buyer protection and their policies are completely buyer oriented. I'd say that you're protected.

At this point I'm not worried. Even if the guy did use this as an excuse for something (maybe like not even having the buggy), I know that Paypal will protect (especially since it's an Ebay auction).

That's to bad MetalMan. Hopefully it won't be to long til' you get the buggy.

Man, I knew this guy smelled a little fishy from the onset... Too bad man, I hope you get that buggy... if not you can always knock on his door and ask politely for your money back. HEHE.

Well, I got a message from the seller earlier. He asked if I got it yet, which I assume means that it has been shipped. However, I have not received it.

The Hyper 8 Pro finally arrived. Almost immediately I began gutting it, removing all of the nitro "crap." Upon closer inspection I found that one of the bearings on the center diff is in pretty bad shape, as it has a strong tendency to resist movement. Also, the rear diff's input gear seems to have too many shims, as the rear diff is tight, even with the dogbones taken out. Some of the ball joints on the steering are also tight, making the steering rough.

I will have to get on the seller's case, though, because he promised some spare parts would be included due to the excessive time it took for me to receive the buggy. In the box were some minor pieces, such as front arms, and do not classify much in the way of spare parts (IMO).

For those wondering, the box was shipped from South Carolina, with a name on the return address that is different than the name of the guy I sent the money to...

Soon I'll start designing the motor/center diff mount, and then I'll cut it. The motor will be on the right rear, as low to the chassis plate as possible. The battery will be on the left, and it appears that I might need to make a sort of raised battery mount like Brian_G did because of the limited space between the spur gear and dirt guard.

avid-rc is a great place for bearings....

I've already got some other 8x16mm bearings laying around, so I'll use those before dishing out the big $$ for higher quality bearings. Besides, these electric motors are more than powerful enough to push through a little bearing friction :).

Took long enough :p

I'll have to come see it one of these days.

Also, it seemed like your post got kind of cut off.