HELP¡¡¡¡ DASA 16 mm

[meucarango]

help

Magnum Pump I have a turbine and a propeller 140mm to 144mm 12/18 Magnum already installed in the jet and I can not do the backflip.
I advised to change to achieve the backflip?

:brap::chairshot:

FOR YOUR PUMP YOU MUST INSTALL 145 SET BACK PUMP SKAT TRACK WITH 14 VEINES, skat trak don t make bigger
on my dasa +16 WITH TWIN 48FS NOVI , i have this set up CARBS:
low 110
HIGH 130
2,5
115 SPRING

AND IT S GOOD WITH 12,8KG COMPRESSION, with 90,5 MM PISTONS
GOOD LUKE

 

[lerott]

:crying: :splatt:

I think your exhaust valve is too long, you need to remachine this part

 

[wsuwrhr]

Is it possible you have the valve in upside-down?

I cannot believe you put 5 pistons in this thing before you asked for help.

First off, I have concerns that the pistons you used don't match the domes. I have already asked that question.

Second, something is either wrong with the valve, or someone could have installed the valve upside down.

As many times as mechanical interference has happened already, the sleeve either needs to be bored, honed or replaced and the crank/rod should be inspected as well.

Do you have the shipping container you received with the motor and are you able to send us back the motor so we can look at it and make the necessary repairs?

I would like this to be right.

Brian

 

[SUPERTUNE]

These are some of the issues that are your problem...if the squish is correct, rave valve has to proper clearance, and exhaust port is chamferd enough for the rings not to catch the port.
Compression ratio could be to high, too much timing, not high enough octane fuel, add 1/2 cooling lines, with extra piston clearance.
Carbs are too small and also could be to lean, pump not setup correctly to match engine setup.
This is a common problem when engine is not setup right.

 

[wsuwrhr]

Seems to be broken precisely where the valve would contact it.

I believe the cylinder was bored, after the first piston got stuck, as well.

These are some of the issues that are your problem...if the squish is correct, rave valve has to proper clearance, and exhaust port is chamferd enough for the rings not to catch the port.
Compression ratio could be to high, too much timing, not high enough octane fuel, add 1/2 cooling lines, with extra piston clearance.
Carbs are too small and also could be to lean, pump not setup correctly to match engine setup.
This is a common problem when engine is not setup right.

 

[meucarango]

Turbine

Here we detail an image I want to explain on the turbine
:rant:

 

[meucarango]

We think the same and replace pistons and valves machined
to testing broke all over again.
:rant::rant::rant::rant::rant::rant::rant:

Is it possible you have the valve in upside-down?

I cannot believe you put 5 pistons in this thing before you asked for help.

First off, I have concerns that the pistons you used don't match the domes. I have already asked that question.

Second, something is either wrong with the valve, or someone could have installed the valve upside down.

As many times as mechanical interference has happened already, the sleeve either needs to be bored, honed or replaced and the crank/rod should be inspected as well.

Do you have the shipping container you received with the motor and are you able to send us back the motor so we can look at it and make the necessary repairs?

I would like this to be right.

Brian

 

[wsuwrhr]

Translate "probar" please.

Would you be interested in shipping the entire engine back in the crate so DASA can be inspect it?

Brian

We think the same and replace pistons and valves machined
to probrar broke all over again
:rant::rant::rant::rant::rant::rant::rant:

 

[geraban19]

Weird.

 

[2XLR8]

The pistons are machined . You can tell by how thin the ring land is above the ring. There is no reason why the 500 piston could not be machined in Argentina. It would be of max importance to check the squish height after every piston change to verify. The 3rd picture is not focused very well. It would be nice to see a focused pic of the piston in the bore at bottom dead center. This might give us a better clue.

 

[geraban19]

Here we detail an image I want to explain on the turbine
:rant:

Just a question....
Is it common to run Mag's like this??

 

[wsuwrhr]

You are absolutly right, as long as it was.

There is no reason why the 500 piston could not be machined in Argentina.

 

[wsuwrhr]

Do I read it right that you are using a 140MM vein section and a 144MM impeller housing? Is this right?

Kyle says our 16MM engines we are using a 155MM pump setup with a 13.5/19.5 impeller, your nozzle should be fine the way it is.

Brian

 

[wsuwrhr]

Jetting specs per Kyle:

140 Pilot
130 Main
2.5 needle and seat
22lb popoff

 

[easyrhino]

How about the counter bore in the domes being smaller than the piton size
? It's less than a 1/6" deep. It may or may not show to be a problem on the squish test.

 

[wsuwrhr]

How about the counter bore in the domes? It's less than a 1/6" deep. It may or may not show to be a problem on the squish test.

Step in the domes should be correct, we cut domes 100-200 at a time in a CNC lathe.

While anything is possible, doubtful there is interference from the step being too small in diameter.

If he cut his own pistons, the squish needs to be re-checked, no doubt.

 

[geraban19]

By what Im seeing, the guy is working by himself without contact DASA direct.

I always had motors made by DASA that I got from LENZI and later direct thru LEGDRAG and it was turn key. I never had to mess up with this. (Im saying that I assembled the engines, not a assembled motors that come already checked).

The only problem I had was a sleeve dropped after assembled motor even without go to the water.

Just a cent.

 

[easyrhino]

I'm saying the squish is wrong. Im saying that the domes is cut for a 88mm piston and a 90mm pistin will hit. It maybe difficUlt to measure this with a squish test.

 

[wsuwrhr]

It seems that way. It has been frustrating trying to find out what is wrong and better yet, get it right.

There seems to be a severe language barrier.

Brian

By what Im seeing, the guy is working by himself without contact DASA direct.

 

[wsuwrhr]

No chance, the 88MM bore domes don't even fit in the 90MM head setup.

Second, you would definitly see it in a squish test because there wouldn't be anything left if there was interference. It would be smashed to nothing.

Brian

I'm saying the squish is wrong. Im saying that the domes is cut for a 88mm piston and a 90mm pistin will hit. It maybe difficUlt to measure this with a squish test.