feigao vs ammo

[chunt92]

mysv 27 is gettin only 38.9 mph i know its a prop issue any recomendations . ammo 2300 smc 2c 5000 lipos 2 pacs. hydra120 using a ballanced and shapened GrimRacer 40x52 3-Blade. also what should the settings be as far as timming and the current limmiter should it be disabbled? some people are saing it should be 48.9 so what am i doing wrong? is ammo 2300 not as good as a feigo and is it worth the extra cash 4 a hacker or a neu motor?

[chunt92]

here's some pics if it helps?

[andym]

Disable the currant limiter, with 20c 2p it is not an issue and try a m445. The way the currant limiter works it will never allow the esc to run flat out and this can cause more heat.

[kin]

i just got her GR 40x53/3 prop and the rest on stock cond, runing 2s 500mah lipos , yet to see the diff on the from stock props , and soon planning to get hydra 120 and feigao 9xl motors , i think as for me this would be the ideal set up for a very fast sv already ...

[chunt92]

ill give the limmiter a try this weekend i dont have a m445 i guess a m447 is to big? the reson i ask about that is i have it. and what about the timming low normal?

[obrien]

I would try the x642. I know of a couple of people running that prop on the SV and love the way the boat runs. From what I have seen with my buddies SV, it seems the grim racer props have alot of bow lift. I am going to try and get him to run my 642 once we get a chance to get back out.

[Ctonez]

Chunt - How do you know it's a prop issue?

I run a barracuda 125...basically the same ESC as you.
I run the Ammo 2300kv...same as you.
I prefer the 437/3 blade (smaller prop)because I race in an oval, but I still get 48+ on the GPS.
the 440/3 blade is basically the same as the grim prop, and I get 52+ with that prop...which is too much for the hull, and the reason i run the 437/3, but either way, 38.9 w/ the Ammo 2300 and lipos is too slow.

What temps are you seeing?
How often do you lube the drive cable?
Is the stuffing tube aligned correctly?

I'd look at the drive line, not the prop as the main slowing factor.

...unless that grim 40x52/3 is a big pig anchor of a prop, but I don't see how that'd cost you 10mph+ on this setup.

[chunt92]

437 prop tests.temps on the motor was warm with batts. about the same i can hold my hand over the end of the motor and keep it there.i cant get an accrate reading due to the water cooler covers the whole motor (water shoots out about a foot and a half)the drive ling is almost purfect as far as alighnment the shaft is very easy to turn and gets lubed every day after a run. i only have a set of lipos. i took a vacation day at work to run it this afternoon and did some prop changes the 437 was 39.2 the grim was 37.5 and i tried a m447 39.6and that was a big and costly mistake all of this was with the timing on normal and the current limeter off. the motor seized up u could smell some thing burned got it home unpluged the motor and hooked up a castle creations motor from a emaxx just to see if the speedo was ok then the smoke rolled. so it needs to be sent back. ill post some vids on utube tonight.

[SweetAccord]

Try to remove the right rear turn fin unless you need to turn at high speeds. If you are just running straights, remove it, you should gain 1-2 MPH Don't unscrew from the bracket off the SV either, just remove the one screw that is holding the fin.

By your pic, your water pickup maybe causing a drag too, maybe losing 1-2 MPH? Try to move it up more looks kinda deep/low, or go to the water pickup on the rudder. without changing any props yet, see if you gain on that alone. Or go for the prop changes already recommended, get an average speed and from there try the changes mentioned.

Good luck!

[chunt92]

its gona be a while both the motor and speedo are cooked im uploading some vids on utube as we speak and after that ive got some pretty cool looking pics of the motor and speedo tring to keep a good frame of mind couse its probably gonna cost at least 150 bucks to fix my mess lol.

[SweetAccord]

Ugh on the fixing the mess. Sorry to read that .

Oh hey, also check that they flex cable is very free and not binding. Should move pretty freely by hand.

Also, some report a gain in speed by not using the teflon liner and just run the cable bare. It does make it more free, but not sure HOW much gain is attained by that alone, if any really .

[chunt92]

it felt pretty good before and after the run i just checked it. very little resistance.

[SweetAccord]

Kewl, when you can run it, try what I mentioned. I've also found threads where "scuffing" the bottom of the boat allows more speed too. Don't know if you have ever heard of that or have done that one. I won't do that to mine unless the gain is dramatic!

[chunt92]

yes ive tried it on my minivee it seemed to help but it wasnt much.http://www.youtube.com/watch?v=PMTYd0Vk5t8 this is the second fastest 39.2
http://www.youtube.com/watch?v=xrDQW0WWaYU this was the grim prop at 37.5
http://www.youtube.com/watch?v=DCrzMHF3e3cand last was the killer lol. m447 at 39.6
pics comming soon..

[chunt92]

hope i get mony back on my taxes lol some one posted a reply about the temps how can i get an accurat reading. in one of the pics it shows how long the motor is compared to the water cooler i know people check them but i dont know how?