Which is better? (mega/feigao)

[DrKnow65]

Demon, getting hard to find. Good choise for a ride, guessing it's 318 v-8? Or are you one of the few with the 360? The new (old style) hemi's have not dropped in price since I was 16 and I'm 32 now, still ~$8,800 complete...

I ran a 67' chevelle SS 396 (changed it out for a 454 that was making 580hp and 616ft lbs torque) I had it running 10:80@138mph in the quarter. That was when they wanter fire supression, 5 point cage, racing hrness, ect. Couldn't afford the gear so I quit racing. Wish I would have kept the car, but I really wanted a 64 chevelle anyway.

[speed demon]

10.80's holy crap that's fast. Mine is a daily driver so its not that fast. My best is 12.507@112.5 with sickening 2.1 60ft.(street tires) I have the power to get into the 11's but don't want to try slicks just yet. It was an original /6 car but I built a 340 with race aliumiun heads that I ported and flowed.(287cfm@ a low .525) Ross pistons manley rods forged crank ect.... I constantly swap pigs from 4.10 for racing to 2.76 so I can drive it without spinning the motor to the moon on the interstate.

[DrKnow65]

Nice and clean SD, that 340 must be pushing the car around very well indeed. I like that you went with the holley demon for a carb :) Aluminum radiator propably keep it plenty cool but I'd toss that fan (They never pull air like they sound they are) get a pair of high flow 12" electrics and mount them diagonally. You'll pick up a few HP and not have the three little scars on your elbow like me hehehe.

I absolutley loved my chevelle when it had the 2.98:1 freeway fliers in the 12 bolt. I swapped up to 4.11's with a spool but was never happy about the RPM's at freeway speed (spent alot of gallons at 6,000 rpm going from cali to vegas). Twisted alot of driveshafts (even a $380 race shaft that was supposed to be good to 1200hp) before I realized the bushings in the trailing arms (boxed old school) were junk letting the rear end rotate up and bind the joints... oh whell live and learn.

I had a mercury 454 marine block (thicker cylinder walls you could bore to .110 over) rectangle port iron heads, 10.25:1 pistons and a eagle forged crank (454). Single plain holley manifold and an 850cfm double pumper, stock rods (yup) and super comp headers running dual 3" out in front of the rear tires.

Never broke 11:50 with the 295/70r15's but then I borrowed a set of 10" slicks and man did it fly!

Best money I spent on that car was the trailing arm bushings, hochkis springs (stock hieght), and 1 1/2" swaybars front and rear. The car never got more paint than primer black :( stripped every part and all the undercoating to cut weight (~2650 lbs w/o gas)
She was LOUD and rattled to no end, I loved that car. Didn't even have a radio.

No power brakes? you still running drums in front? disc's were my first upgrade after I hopped a curb and almost hit a lady waiting to cross the street at a red light.

[speed demon]

Tried the whole dual spa fans but never did like them. I had promax put in some annular booster inserts into the downlegs. The LM1 meter says I'm dead on with my tune. Only thing that gets on my nerves is setting the lash every so often but the jesel rockers help them stay within spec(.018). I still have alot to do and really want to go to a solid roller but not just yet.

Oh brakes are 4pistons up front and 11inch drum in rear. I don't pull enough vacuum to run power booster.

[DrKnow65]

That 340 has a shaft style rocker base right? I know I had problems with valve adjustment with the 454 till I put a brace on the studs. I was only running the Z28 springs, 1.6:1 comp roller rockers, and I think the lift was like .480" on the cam.

I did later build a 400hp small block and used the Rhodes hydraulic lifters, they took some of the lope away but didn't improve the idle vacume??? never could undersand how that worked. Still I liked them.

Wish I could have gone mechanical roller cam/lifters with a belt drive and aluminum heads, but man that stuff was EXPENSIVE 10 years ago!

[DrKnow65]

speed demon, do you need a fan yet? (assuming you have a temp gun), can you run it hard then post up some temps?

I use a sunon fan from digikey.com it's 5v's but does just fine on 6v. It's $11.57 plus shipping so I'm sure there are cheaper alternitives, I just wanted the best spec's possible for a 20x20x10mm fan. If you want I'll find the link.

[speed demon]

I got my first run in and I'm not happy with it. The temps on the motor were131 max but the controller was 219 and it shut down on me twice. Also top speed with same gears, lipo, ect... was alot slower. Am I programing it wrong? What is a good setup on the controller? Also the lipo was the same temp. as normal.

[DrKnow65]

what speed is it geared to? You may need to gear up some. I would think that ~40mph should be close for a starting point. Remember that 6 pole motor makes tons of torque so tall gears will not make it unhappy. The esc will be switching overtime with small pinions causing it to heat up.

If I remeber correcly the high pole count motors like more timing and more punch control. I'll get that fan info for you in a bit.

[DrKnow65]

http://search.digikey.com/scripts/Dk...me=259-1319-ND they have gone up in price, but still the best fan out there in my opinion... Do a search and you should find the novak fan guys are using pretty easy, I think it was like $6-7.

But go with gears first! In car terms it's like a big block (high torque, low hp) and a small block (low torque, high hp). If you gear the small block with 2.98:1 rear end it's a dog. If you give the small block 4.56:1 gears it can spool up fast and hauls butt. If you give the big block 4.56:1 gears it cant spool up fast enough and the car is a dog. Give it 2.98:1 gears and it will pull right through them making the car fly :)

You now have a big block. Gear it accordingly.

[speed demon]

OK I have a 28pin which I will try. I was just baffled because both motors are 3500kv. I figured that they would have the same top speed with everything else being equal. Where did I go wrong with that thinking? One last note the new motor draws more power then before. During our ten minute races I usually pull 2800mah but this time it pulled 3600mah.

[DrKnow65]

Heat is produced by waised wattage. In other words your MM was acting like a 300watt heater and an ESC :(

The difference in the two motors is the pole count. The 2 pole motors don't produce as much torque but they spool up well and have good high end power. The 6 pole motors make tons of torque and bottom end power but the get less efficient at higher RPM's.

Lots of gear should bring the rustler around.

What settings were you running on the MM? I'm guessing by the sound of the lack of top end speed you are at full throttle and max rpm alot?

The teps should be fairly even for the ESC, Batt, and Motor. With the motor being a little warmer than the rest. Seems like 140*f is the max acceptable for all the components.

[speed demon]

Holy crap I'm a moron. It's all my fault for it not working right. When I first turned it on I had to do the whole radio thing. After I did that the forward was reverse and visa versa. Not really thinking too much about it I just flipped the channel switch on the radio. During the first run with the guys I didn't use my brakes but later(during lunch) I was out back bashing around the RR tracks and noticed that when I hit the brakes that it goes into reverse. That got me thinking then it hit me I had the wires to my motor backwards. I set it up to have 75% brakes so there for I was only running 75% forward with the wires backwards. Man I feel stupid.

There was a spare fan at work the right size so I'm using it but it is made for 12V so it doesn't push much air but it mounted perfectly so at least I know the size I need.

Thanks for all the help...much appreciated.

Last questions. If I do get dirt and stuff into the motor can I simply use cleaner that's made for the brushed motors? Same process?

[Revracer]

the mega is sick! i love mine. run it in a revo on 3s geared for only 40. it is crazy strong. loads better then feigao

[DrKnow65]

Don't know about the brushed cleaner? I use a shop vac (never compressed air, it pushes stuff into the bearings). Once in a while take the motor out and make sure it spins free, you can get bad bearings or iron filings stuck on the rotor (like putting a magnet in the sand, you pick up stuff).

You ran it long enough to get new temps yet?

[speed demon]

Nope will have them tomorrow. I have a ton of cycles on my lipo and will be getting a new one in the near future. I've had such great luck with the milehighrc pack that I don't want to get anything else but I've be considering a 4S and he doesn't have them in 4000mah. Doing the math the motor is a max rpm of 44k and a 4s will be over that but I've read here before that a motor normally doesn't reach its max rpm becaues of drag and what not. Also the MM has a setting for a 4S lipo cutoff...does that mean it can handle it? I ordered a fan and terminals today so it should be in next week. The fan is 40mm square but that's the fan size that mounted great. It's 5v and pushes 6cfm. Should that be enought to cool it?