Carb swap?

[savage XL]

Hi all,
Excuse my noobness, but will a Picco 28 carb fit into a HPI K5.9 engine without the necessity for any mods?
If I have to sleeve it to fit, that's no problem, but if it's the other way it could pose a problem for sealing.

I HATE the mid range needle on my K5.9's, they're always moving and needing to be adjusted!

Thanks all in advance.

Cheers.

 

[Scrogg]

Just install new O-rings on the MSN. Get it set, then smear rtv over the head of the needle. Problem solved. The carbs are not interchangeable.

 

[savage XL]

Thanks Scrogg!

Can you tell me if the Picco carb is larger or smaller in the throat over the HPI carb?
I have extensively modified the original carb, the improvement has been noticeable, but not up to my standard, it's still quite difficult to keep a steady tune on it.

I'm waiting on a Picco .28 JL Team Turbo engine to arrive, I will check it myself once it arrives, but would like to know what I'm up for.

Is the roto start compatible with this engine? If not, why not? Is it the pin hole that goes into the crankshaft that's missing? I am yet to see any pics of the internals of a Picco .28, so I do not know why the roto start isn't compatible.

Cheers.

 

[ohsnap]

You should be able to use the same Roto-start but you'll need to fabricate two parts (well one part twice).
Note - I haven't owned a Picco 28 nor a HPI K5.9, but I have owned a number of HPI engines as well as a Picco "Outlaw" 26 and their 27.

If your engines are anything like mine, your Picco has an internal OWB with a hex headed shaft inserted into the backplate. It's about 12mm and extends 5mm out.

The standard HPI design has an external hex OWB that measures 12mm x 12mm.

So the Picco is the same width, but shorter - and the shaft is held in place by a spring that fits into the dimple on the end of the shaft (this keeps the shaft from drifting/working it's way out).

I had some spare carbon fiber laying around that I cut and sanded (Dremmeled) into a hex shape and fit these into the bottom (back?) of the roto-start.
BTW - Wear a mask and glasses when dealing with carbon fiber
On the 2nd carbon hex, I drilled out the center for the spring to fit into.
Works like a champ.