More Speed questions

[roadrashracing]

I have hit 31 mph but am looking for just a little bit more, I am running 25c 4000 2 s packs, stock motor, the blue speed control, and a 52x55 grim prop. I messed around with the strut angle and feel thats its in the ball pack. Does a higher c rating or esc change give you more speed? Just really learning boat setup now.

[Make-a-Wake]

What kind of boat is this??????? Higher C rating has more punch to it and they will come in cooler.

[roadrashracing]

An impulse since it was listed under the impulse area

[Make-a-Wake]

My bad, i just looked under the "new post" category, been using it as it saves time showing only new posts. Those sure are neat boats...........what are your temps now at the 31 mph mark? If fairly low you can prop up, however you are using a large one now, hmmmm 52x55, right?...........an ESC change wont give you any more speed. The only way a new speedo would help is if you go to a bigger motor and need one.

[Make-a-Wake]

Didnt think they made a 52x55...........thats awfully large...............

[roadrashracing]

my bad prop is 42x 55 elctronics are cool battereis are warm after run.

[roadrashracing]

so a higher c rating might give you a mph or 2, new batteries are coming in spring

[Darin Jordan]

so a higher c rating might give you a mph or 2, new batteries are coming in spring

When you get good cells... Try an Octura X645... There are several prop options that will get you closer to 40, but I hate to recommend them unless people are willing to upgrade all their connectors, and also are willing to push their equipment over it's "rated" limits...

If you upgrade all your connectors to 5.5mm minimum (you CAN live with the deans, though they will get warm), you can push some pretty decent props behind this boat with the stock power system. The X645 is a really good starting point.

[roadrashracing]

Not looking to haul ass all the time just for a fast run here and there, I am running traxxas connectors and 4 mm motor connectors. I mean just these lipos where a big jump for me.

[Darin Jordan]

Not looking to haul ass all the time just for a fast run here and there, I am running traxxas connectors and 4 mm motor connectors. I mean just these lipos where a big jump for me.

An Octura X645 will give you some good, fun speeds... The 42x55 is a little small in diameter, though it can be made to work as well if you know where to bend on it to increase it's pitch... And ABC 45x55 is also a good choice...

[roadrashracing]

Well I was impressed with 42x55 prop change

[Make-a-Wake]

Consider an m445.....................

[Darin Jordan]

Well I was impressed with 42x55 prop change

Despite what the prop-charts say for pitch, the 42x55 is a GOOD prop... It's rated at 55mm, or 2.165" pitch... I've NEVER measured one that is that low, however... most are over 3"! The stock prop, essentially a Prather 215, is 2.5"...

Hope you are enjoying the Impulse!

[Darin Jordan]

Consider an m445.....................

The M445 is actually LESS pitch than the stock prop (2.478"), though the blade area and shape may add to the speeds...

[roadrashracing]

Will setup the boat different ways make a big difference in speed? I only have one set of lipos so everytime a switch battereis I need to mess with the setup.