Help creating a low budget Hyper 7 brushless

[DrKnow65]

Hi guys, been a while since I've been around the forum doing more than lite reading... But it's time to start playing again :-)

What I'm looking to do is throw togeather a new basher with my upcoming birthday budget, ~$450 USD.

What I have to work with is a Hyper 7 PBS that needs a little repair from a runaway incident of the fuelly days. Chassis is just bent enough to warrant replacing and the front driveshaft is tweaked too. Other than that the diffs, linkage and such is in good working order. Still have good radio, servos, ect to work with.

What I don't have yet is a MMM Esc and motor combo, lipo's, and what ever else it takes to convert to brushless.

I'm not a noob, but advise on the best budget items would be appreciated.
I am thinking 6s total with 2x3s 5000mah zippy lipo's and custom made CF trays. But it's spur gear/ motor mount where I'm stalled.

Was wondering if a tranny from the nexx8 electric would provide a cheap electric swap alternative?

[E-Revonut]

A MMM 2200 combo would be a great motor esc combo for this and its really hard to beat the price, performance, reliability, quality, and customer service that backs it up. You may find something cheaper but it will not be on par in the rest of those categories. You will also need a motor mount, the RC-Monster store has them, as well as a pinion gear and battery tray that you will need. Other than that you need a lipo and a lipo capable charger if you don't already have one. Lipos can be found in many places, RC-Monster also has them but many people go to HobbyCity for the zippie lipos, I have also seen some good prices on lipos from many other hobby distributers lately. I prefer NeuEnergy Lipos for their performance/price value. You will only need a 4s pack unless you are planning on an all out speed demon, 4s with the 2200 combo on a buggy will easily get you 40+MPH before you have any heat issues.

[DrKnow65]

Yah, the Mamba is a no brainer from my point of view ( I did a dual fet board mod on a mamba max a while back that was awesome, though the max amps lipo's were a big let down...)

The RCM mount I'm aware of, but I am under the impression that getting a composite spur gear on the center diff is a no go on the hyper 7?

[tashpop]

too bad your waiting, could take advantage of the sale and get 20% off esc and off the clearenced motors.

This is a budget combo set: http://www.okhobby.com/product.php?id_product=1234

[DrKnow65]

Tashpop, was up late last night reading the castle sale thread :-) very sweet. I'll be placing an order for a 1520 today. Thanks for mentioning the sale though, had I not already found it yesterday it would have made a world of good for this persuit.

Too bad they don't have the MMM's on sale :-)

I'm half considering redirecting the modded MM from it's 10th scale duties to run the 1520... But I really like the idea of using a MMM so I don't have to worry about the reliability of the very finite soldering I've done in the mod process.

[DrKnow65]

Dj sparky that IS a cheap combo, but I'd rather spend twice that to have the castle logo on my car :-) seriously though I realy like the time and effort guys like Patrick and the support team at Castle put into this site, so I'd rather pay them a portion of my playing funds. Thank you PM's are good, but cash in their pocket is better :-)

[DrKnow65]

Order's in, got a 1518 instead of the 1520 as the 1800 kv will keep the motor closer to the 35,000 rpm sweet spot for more of the throttle range at 6S, and it's just a touch less massive to fit in the buggy ;-)

[E-Revonut]

Originally Posted by DrKnow65

Dj sparky that IS a cheap combo, but I'd rather spend twice that to have the castle logo on my car :-) seriously though I realy like the time and effort guys like Patrick and the support team at Castle put into this site, so I'd rather pay them a portion of my playing funds. Thank you PM's are good, but cash in their pocket is better :-)

Well said! It's money well spent, knowing that IF something does go wrong you have the support of Castle. It's cheaper in the long run to buy castle the first time rather than cheaping out on the initial purchase only to replace it with something from Castle in 3 months. I've only owned one esc that wasn't from Castle, it was a Novak HV that lasted like 2 months then I put a MM in it's place. The only car esc that CC makes that I don't own or haven't owned is the Micro Pro

[DrKnow65]

Well, I've started working out the future layout for the hyper. I managed to find a center diff in my spare parts that will take a nylon gear (ofna ultra mbx iirc), it's longer than the hyper 7 but that's fine as I was going to relocate the CD anyway.

I mocked up the 1518 with a trimmed toilet paper roll :-) I plan on either making a diff/motor mount, or buy the RCM universal set that puts the motor over the diff, but that would be a large portion of the budget. Either way I want the motor centered over the center diff.

I found a 16mm x 6mm dog-bone to put the CD right at the rear diff, and with the spur gear towards the front of the buggy it would locate the motor just above the center of gravity on the chassis. I'll either find the correct length front driveshaft or build a 2 piece with a carrier bearing and cva.

I could locate the batteries on either side of the chassis and adjust them front to rear to change the weight bias... That's the way it's planned today anyway

[brushlessboy16]

If you need a hyper 7 parts car PM me :)

has battery trays driveline etc.

[DrKnow65]

Have a quick request from guys who run 1/8th brushless buggies....

I've settled on a 6S/1580/MMM setup, question I have is wieght VS runtime, i.e. I'm looking at either 2x3S5000 in series at ~2lbs -or- 2x6S4000 parallel at 2.8lbs
Basically it's 5ah at 2lbs, or 8ah at 2.8... is the extra .8lbs worth a 40% increase in capacity. Total wieght (just a quick calc w/o all the parts assembled yet) 5ah= 10.4lbs, 8ah= 11.2lbs

[E-Revonut]

Thats a heavy buggy! My truggy RTR is only 10Lbs

[DrKnow65]

Yah, I'm already looking at narrowing the stock aluminum pan, making CF batt trays/splash guards, and going aluminum on all the suspension components to lighten it up. But that's all a down-the-road thing as I can only spend so much at a time :-)

Priority #1 is getting it up and running

[DrKnow65]

Woohoo!!! And so it begins :-)