Mg all out no limits upgrade advise needed

[Blockhart]

I have a stock MG currently running a 220 b&s, offset rudder, and getting 38-40mph gps. Want to put together a 'no limits' refit but could use some advice. I'm thinking 4s2p with seaking 180 and a leopard 2200kv but not sure weather to go with a 4074 or 4082 and how that will affect the prop I can use, performance, and if the 82 will even fit (will be changing out the mount). I want to be well into the 50's but still maintain reasonable run time and stability. Do I have to run separate bec or off the speed control is fine? Also, I plan on running 2 large cooling loops but I'm not sure what the most efficient way for a cat is to set them up. Any feed back would be great.

[CHIEFY_44]

with the setup you have written down here but with a m445 you can be into the 50mph mark and still have decent run times, this is my opinion i would remove the bec and run a seperate battery pack for the rx, but you will have to blue print the hull if there is hollows in the ride pads, mine did and i had to do this but hey the boat is solid no more wahwah and runs true.

[Blockhart]

Thanks CHIEFY, can anyone tell me if a 4082 will fit in the MG and what the best water pick ups are for a cat?

[Fluid]

I do not know if the big Leopard will fit, if not you can use a 3674/2200 which is a bit smaller but will still meet your performance goal of 50 mph. IME the rudder is a great place for a water pickup. Drag is lower than most any other method and it is easy to do (KISS). I have also used pickups in the bottom of the sponsons near the transoms, these work well but are tougher to make. Roostertail pickups work but have higher drag than the methods above.



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[Blockhart]

I was really hoping to get the high rpm 2200kv but maintain a lot of torque with the bigger motor 4082. I will difiantly keep using the rudder pick up but maybe a larger hose. Am trying to deside what to use for a second pickup. I'll probably go with this w56086
All though I like the look of this as well 56087
I'll post some pics once I get started. This boat is going to be super bad. It's getting painted and everything.

[wilsta67]

seriously doesnt need the second pick up. im running a cc 1515 2200kv / T-180 esc on 4s have the cooling lines running straight through both on the single rudder pick up with no issues, and have only replaced bigger water line. and using a x442 prop getting high 50s with plenty of trigger to spare just could not handle the full trigger with out blowing over it was very flighty but fun:rockon2:
you can buy a new cc1515 on ebay for $100

[Blockhart]

I'm looking to turn an extra big prop with the 4082 and was unsure how much heat I'm going to create.

[TheShaughnessy]

I'm looking to turn an extra big prop with the 4082 and was unsure how much heat I'm going to create.

Extra big prop on small 29" boat = lots of prop walk and torque roll. Much bigger then a 445 and i imagine you will start having problems keeping the left sponson to stay down. Just my opinion though. There are ways to reduce the effects i suppose.

[Blockhart]

All else being the same what diFference would I see between a 4074 and 4082?

[ron1950]

All else being the same what diFference would I see between a 4074 and 4082?

none......put a m445 on and go

[Blockhart]

Ok my mind has been changed. 4074 it is. I'm running a s220 right now. How should that compare to the m445? Also, does anyone else have any thoughts on cooling? I run in really hot water all summer, 85-90+*F, so I'm still thinking I should still add the 2ed cooling line. Thanks for all the input

[LarrysDrifter]

Use the rudder pick up. You don't need to cool things separate, even if the water is "hot". Doubling the water pick ups doesn't make the water temp lower. I'm usually obsessed with cooling, but still realize only 1 pick up is needed. Upgrade the lines to larger diameter and make sure it flows freely with as little resistance as possible.

[ron1950]

run the 220 and see what it does......its prob fine ...i have never tryed one yet

[Blockhart]

the 220 has been good for me (40.2 all else stock) all though I'm waiting for a 642 and 445 to try. Does anyone know if the 4074 will fit on the stock motor mount or if that's even advisable?

[JPriami]

Im about to put a 4074 1800Kv in my 2nd MG. On the first MG I ran a castle 1520 motor and thats a little bigger than a 4082. I epoxied over the wood and made a plexiglass brace for the back of the can on the motor to support the weight it had. Worked great even in the crash. But I couldn't use the tupperware top with that motor. I am hoping that I can still use the lid with the 4074 being its shorter.
I will be reinforcing the hull inside with some fiberglass today, I hope if I have time. I took out the battery trays and will be trimming them so they lay down more (deeper) in the sponsons and laying a bit of resin and cloth over them to make them a little stronger too.
I also plan on truing the hull on this MG as well.

[maxmekker]

Well here is mine on the leo 2000 kv with some props. not the best Q but you get the idea.
Today I tested the m445 with 5s. video soon.


http://www.youtube.com/watch?v=v5SiQkL3XqM

[Blockhart]

MaxM,
the s220 sure looked and sounded fast. were you taking any gps readings? which one was your fastest run?
JP,
Tore mine apart today. took everything out and will be adding carbon fiber inside and also going to give it a full paint job. It's going to be a BSH when it's done. I know, sorry MG fans but got to look after my sponsors. It will still be a MG just in red with different stickers. I'm upgrading allmost everything. leo4047 2200KV SK180 4s2p and a 5s1p setup for after a couple cocktails. Will try to post some pics as we move ahead. Then you can see what everyones input has produced.

[Blockhart]

Okay here we go, sorry it took a little wile to get these up. Will take some more tomorrow. Testing/tweaking is ongoing. will get some vid's up soon. This boat came out awesome!
6088860889608906089160892

[JackBlack26]

Looks great!. Should run just as well.

[Blockhart]

Still tuning on it. It's very heavy on 4s2p but great run time 10min or so. quite stable though. 5s1p is much lighter and screaming fast 60.6 mph gps. Cooling is a problem. Copied JP's setup on his first MG and it hasn't worked well for me. I'm going to go back to the rudder pick up for main ESC and motor jacket and use the hull pick ups for the motor mount and ESC bottom plate. Here's some more pics with the top on.6111661117611186111961120

[JPriami]

Maybe look at the holes in your in hull pickups. Make sure water has a smooth un-obstructed flow into the nipple. Maybe even file the forward grooves a little to help direct water to the intake part.

I'll be making dual in hull pickups in my twin project. I won't be using the store bought duals this time. But making them myself from 3/16 copper tubing.

[JPriami]

Oh and BTW that looks really nice what you have done with your boat

[Blockhart]

Thanks JP, I'll try that. If I did it again I would do what you just said. 4mmish ID copper tube but bent so that the intake faces forward. That I think will work awesome for you. I'm running with a motor jacket and water cooled mount as well as on my ESC I'm using the main heat plate and a second one that the ESC sits on top of. So I think I'm going to run the hull intakes to the mount and 2ed cooling plate and run the rudder pick up to the main ESC cooling plate and the motor jacket. If that doesn't cool this girl down then I give up.

[slowride]

Cool background on the photos, great idea to shoot in an engine room. What is the make of the boat ? What are the size of the engines ?

[Blockhart]

It's an 84ft. Lazzara. Cat C-32's. It's raining today so didn't want to go outside to take pictures. :biggrin:

[CHIEFY_44]

Sometimes you have to slow the water flow a little so the heat exchanges better, just a thought

[JPriami]

Just noticed after looking at this on my pc vs the phone. I see what appears to be raised areas all around the aluminum squares of the in hull intakes? If this is so it can hinder their effectiveness a good bit. They should be perfectly flat and flush with the rest of the ride pad area.

http://forums.offshoreelectrics.com/attachment.php?attachmentid=61118&d=1317047131

[Blockhart]

What your seeing is the imprint of the marine tex. I didn't bother to fair that out. (Way to lazy for that :) I did how ever intentionally mount them with a slight down angle from fwd to aft to try to help with flow into the intakes. And, with the hope that it would give the boat just a little bit of down tab effect as at super high speed, especially in less then perfect conditions (which is usually the case for me), the boat can get pretty squirrelly. That seems to have worked so far but has probably cost me some speed.

6122561226

I think your right that grinding out the intakes some and maybe smoothing that flange a little should help flow the water in. I'm still going to run the rudder pick up back into the boat as well and then we should be golden.

61227

[Eodman]

Anyone know what's wrong in the video from entry # 16??????