Engine strip

[Firesorter]

Stripping my 1200, anyone know the magic to releasing the barrels? all nuts and bolts removed, just wont budge either side.

also can anyone recommend someone herts,beds,bucks,northants who will polish and port the heads etc.

cheers

 

[Smug]

Rubber mallet

 

[Deleted account 190920001]

As above plus unless your looking to get the ECU remapped or run a PC and some dyno time don't port the heads. Your fueling will be miles out otherwise.

 

[Bendy toy]

Does porting the heads really make much difference on an R1200?

An off the wall idea but one of these would be fun

Beats all the current EPA (very tough) regs and gives better fuel economy than competing 4 strokes. 164bhp from 800cc should be enough

http://www.brp-powertrain.com/en/desktopdefault.aspx/tabid-235/374_read-355/

 

[Firesorter]

Spent hours beating it with a rubber mallet! The porting wont make any difference to the fuelling though I am considering a power commander and dyno time, not after a rocket ship, just smooth efficient fueling and response while I have the engine apart

 

[mikeyboy]

TTS are local to you,have you tried them.

 

[DrFarkoff]

Have you

Definitely got all the bolts out including the ones in the Cam chain tunnels?

You're right fuelling is independent of the porting as air density/flow rate is monitored on the intake and each cylinder has a lamda probe to control fuel ratios to defined parameters

 

[(RIP) Tunneruk]

I make the OP right, these engines are churned out by the thousand. There can be no harm in a little blueprinting while the engine is in bits, you'll be amazed at the difference removing the odd rough casting edge / burr can do. It's not about outright performance, it's about efficiency

 

[cookie]

air density/flow rate is monitored on the intake

is it?

each cylinder has a lamda probe to control fuel ratios to defined parameters

not across the entire rev range AFAIK.

 

[Firesorter]

Tts I will try thanks, was looking for someone closer, luton used to be awash with engineering firms.

And of course the magic to release the barrels (yes all bolts removed,checked and double checked)

 

[(RIP) Miff]

And of course the magic to release the barrels (yes all bolts removed,checked and double checked)

I'd have said you've missed one...

 

[Deleted account 190920001]

Definitely got all the bolts out including the ones in the Cam chain tunnels?

You're right fuelling is independent of the porting as air density/flow rate is monitored on the intake and each cylinder has a lamda probe to control fuel ratios to defined parameters

Go on then and do it and report back.

Air density/flow is not monitored by the ECU on a 1200, there is no flow meter and the only MAP sensor in the system senses atmospheric pressure only. The lambda only operates on closed loop I.E. cruising and as it is narrow band can only operate in the 14.7 range which may be optimal stoichiometric but its far from optimal for either fuel use or clean running. . It only has a certain amount of adjustment either side as well. Think of a spreadsheet, go outside what's on the sheet and the fuelling goes to pot.
If it was so easy then why do you think people run into fuelling problems just fitting an exhaust and an air filter.

 

[Bendy toy]

Another option would be cylinder head and exhaust gas temperature sensors and a way to adjust the fuelling. Its probably used on this -

 

[Firesorter]

Go on then and do it and report back.

Air density/flow is not monitored by the ECU on a 1200, there is no flow meter and the only MAP sensor in the system senses atmospheric pressure only. The lambda only operates on closed loop I.E. cruising and as it is narrow band can only operate in the 14.7 range which may be optimal stoichiometric but its far from optimal for either fuel use or clean running. . It only has a certain amount of adjustment either side as well. Think of a spreadsheet, go outside what's on the sheet and the fuelling goes to pot.
If it was so easy then why do you think people run into fuelling problems just fitting an exhaust and an air filter.

Not sure what your getting at, are you suggesting my idea is flawed? On the other hand I got home from work, positioned a fan heater next to the crankcase for an hour till it was nice and warm, one tap if the mallet and the barrel came loose and t'other side

 

[Magwych]

... all bolts removed,checked and double checked ...

Just to be sure, that is 1 M8 bolt and 1 M6 bolt inside the camchain tunnel, and 2 M6 bolts on the outside - lower edge. You also need to remove the pivot bolt for the camchain tensioner slide in each side.

Assuming you already have the head off, then if they are all off the only thing holding it on is gasket goop at the base.

I found this note in the RepRom :

--------------------------------------------------------------------------------
Note

The sealing compound forms a strong bond and in some instances engine components can be difficult to separate. Separate the engine components by tapping them with a rubber mallet, without damaging cooling ribs or other parts of the crankcase.

 

[Deleted account 190920001]

Just stating that the fueling will be affected and won't take care of itself if you port the heads. Wasn't really aimed at yourself.

 

[GrinningGSer]

Well, I'd enjoy seeing pics of this job, camchain tunnels etc

 

[Magwych]

Can't show Firesorter's job, but these are the bolts; number 5 and the top number 4 are inside the cam tunnel:

 

[Firesorter]

Thanks, I'm using the same reprom, as I posted I heated the whole thing up using a fan heater, so the whole assembly would expand, I returned after an hour of it warming in front of a fan heater, visually I saw barrel had started to creep from the crankcase, one tap with the mallet and it moved then slid off, same on the other side, also the timing cover freed too.

 

[DrFarkoff]

Thanks, I'm using the same reprom, as I posted I heated the whole thing up using a fan heater, so the whole assembly would expand, I returned after an hour of it warming in front of a fan heater, visually I saw barrel had started to creep from the crankcase, one tap with the mallet and it moved then slid off, same on the other side, also the timing cover freed too.

Perhaps I should have posted this bit in here too! post nine

Good Job Let us know how you get on ?