Reving volvo Edc engines in neutral

[nfluester]

Possibly one for volvo paul:

Have a fellow boater with a pair of Kad300 EDC engines and we want to be able to rev them fully to hear is the supercharger and turbo are spooling up.

The EDC control limits them reining to 1500 or so RPM in neutral is there any way to bypass this limit?

Someone did say to disconnect the gear linkage from the actuator but that sounds a little drastic!

Can we just unplug the electrical connector from the actuator or is there some button sequence we can press.

If wedo have to disconnect the linkage is it easy enough to do?

Thanks

 

[petem]

Possibly one for volvo paul:

Have a fellow boater with a pair of Kad300 EDC engines and we want to be able to rev them fully to hear is the supercharger and turbo are spooling up.

The EDC control limits them reining to 1500 or so RPM in neutral is there any way to bypass this limit?

Someone did say to disconnect the gear linkage from the actuator but that sounds a little drastic!

Can we just unplug the electrical connector from the actuator or is there some button sequence we can press.

If wedo have to disconnect the linkage is it easy enough to do?

Thanks

Supercharger automatically engages on startup until the engine reaches a preset temperature. I don't believe that getting the turbos to spool up in neutral will achieve anything.

 

[nfluester]

Understood but would like to know of a way of being able to rev an EDC volvo engine to WOT whilst on the river.

 

[jrudge]

I am sure you can just lord the throttle linkage, but if the manufacturer decides to put a1500 limit on it I would be inclined to follow it as opposed to people on a forum.

They will have had a reason.

if you want to achieve full revs why not take it off The river for a weekend ? A decent run will clear it out and get it upto temp etc.

Also - and someone may say I am wrong - but a turbo gives it more power not more revs.Revving in neutral requires little power as it is not under load.

 

[nfluester]

A run out to the esturary is planned but with tide time, locks and covd takes a little more logistics to plan.

Wanted to be able to check on the boost gauge that everything is theoretically working

 

[spannerman]

You won’t be able to get the turbos to spool up properly in neutral, the engine needs to be under load. And as stated the rev limit is built into the software, the supercharger runs until the engine reaches 60C to reduce smoky starts, thereafter runs as designed on demand.

 

[nfluester]

OK understood will wait to take it out

Thanks

 

[volvopaul]

The engine will only rev to 1500 rpm because the ECU sees neutral , the only way to rev in neutral is to disconnect the shift cable from the actuator if it’s a stern drive boat , you cannot disconnect a gearbox solenoid as the ecu will see it not connected which will place the engine in limp mode .

 

[nfluester]

Thanks @volvopaul that was exactly the information I wanted clarifying ?

 

[nfluester]

So we managed to get the engines reved up today port engine all good flew up to 3900 rpm but starboard struggles to get above 3000 rpm (unloaded don't forget)

We get a load of white smoke under the water and in the air if that tels us anything?

Checked the inlet of the turbo and spins freely, air filter and fuel filter are all new.

Tried isolating fuel tank and ran of port tank in case it was crappy fuel but fhat didn't seem to help.

Any thought of other things to check or try?

Thanks

Neil

 

[volvopaul]

So we managed to get the engines reved up today port engine all good flew up to 3900 rpm but starboard struggles to get above 3000 rpm (unloaded don't forget)

We get a load of white smoke under the water and in the air if that tels us anything?

Checked the inlet of the turbo and spins freely, air filter and fuel filter are all new.

Tried isolating fuel tank and ran of port tank in case it was crappy fuel but fhat didn't seem to help.

Any thought of other things to check or try?

Thanks

Neil

If you can’t get more than 3000 not on load then you have a strange problem.

check the air filter, check the Y valve on air filter as it can stick restricting the air flow as it tries to pull through the super charger which is t possible when it’s not rotating .

 

[nfluester]

I took the air filter off and the cover whilst running for a minute of so and that didn't seem to make any difference, on reading other forum entries (always dangerous i know) people have had similar issues and pointed to exhaust elbow and or cooling blockages causing white smoke?

you could see a large white cloud under the water and in the air :-D

or injectors?

it doesn't run lumpy up to 3000 it just wont go any more

 

[Portofino]

They rust those KAD elbows from the inside and spray ring bungs up = gets extra hot and what little water evaporates to give steam your white smoke .
Easy to pull and examine , poke out the holes with a dremil as a temporary fix to aid diagnosis.Replace ASAP if the white smoke disappears.
Tell take signs ( happened to me btw ) are orange rust spots coming through the green paint on the outside before you pull it .
While it’s off inspect the turbo for spindle wear and tight fit and the edge of the horn ....they too rust / crumble away making refit problematical .
Don't ask me how I know .
As mentioned check the air pipage in for the rpm loss .

 

[nfluester]

Would a blocked elbow restrict the revs do u think? Or is that a different problem?

 

[Portofino]

Would a blocked elbow restrict the revs do u think? Or is that a different problem?

Suspect a different issue Iam afraid .....as Paul says check the Y flap .

 

[nfluester]

? Bugger where do we sit on injectors? Could they be causing it not to get past 3000?

 

[jrudge]

What problem are you trying to solve?Is there an issue if you take the boat out ?

 

[nfluester]

The problem is the boat won't get onto to the plane and run at speed we thought it was a dirty bottom but has been out and re antifouled.

Hence we are looking at the engines and that's why we wanted to be able to run them up to speed and see if there was an issue.

And the issue is that the starboard engine is not producing its full revs and thus full power

 

[Portofino]

Compare the tight fit of the turbo blades within the drum , with the 3900 rpm engine and the 3000 rpm .
Do an arbitrary finger spin test to maybe feel the 3000 rpm engine is a bit stiffer .
If both are identical to sight and feel while you are in there swop them over re install everything and see if now - the 3900 rpm engine can now reach the same 3900 .If it does you can safely disregard any turbo issues .

If the problem follows the turbo.....that’s your diagnosis.

 

[Portofino]

Need to eliminate a restriction in the fuel pipe (s) so try swopping them at the nearest point to the engines , not at the tank cock which I think you have already done to check the fuel quality .