Shreddr's HP2S Big Bore Dyno Result

[kpolito99]

Rather than everyone around the globe reinventing the wheel and paying for setup to have these shims cut why can't someone (potentially in Germany) who has had this done simply collect names for a group manufacture/buy and help the cause?

After the program has been made it should not cost much to burn numerous copies from a sheet of 1mm thick aluminum.

Who has made these shims already? Why not try to recoup some of your setup costs and sell shims to other boxer riders that want to increase their oil pump performance?

[shreddr]

Originally Posted by kpolito99

Rather than everyone around the globe reinventing the wheel and paying for setup to have these shims cut why can't someone (potentially in Germany) who has had this done simply collect names for a group manufacture/buy and help the cause?

After the program has been made it should not cost much to burn numerous copies from a sheet of 1mm thick aluminum.

Who has made these shims already? Why not try to recoup some of your setup costs and sell shims to other boxer riders that want to increase their oil pump performance?

+1 Kurt!

Recall the R12S rear brake pedal bushing, that worked out well.

[1100s nut]

I have a question on oil pressure. Is it possible to increase too much and cause problems? I don't no how much is being sprayed on things like in auto engines but could too much pressure cause the oil atomize too much or seal problems under the increased pressure? Just curious.

[omg1010]

From Germany I doubt that anyone will get the job done any send the same to the US. Simply because the liability issue would prevent anyone from doing so. Secondly the shipping cost would be prohibitive. I suggest that someone in the US gets this done.

Apart of that I don't think there cannot be be an overdose of oil-supply.

Brgds
Oliver

[kpolito99]

How many people stateside would be willing to sign up and pay for a shim to increase your oil pressure?

I might be willing to do the development and source a supplier (shop that can laser cut the parts) if there is some demand.

You would be responsible for sourcing the other required parts and for installing the items. I fail to see where there is any liability on the part of the supplier. Anyone who assumes the risk of modifying their motorcycle with aftermarket parts is accountable for their own actions.

Let me know guys... .. .

[markpnb]

I'm in Australia and would contribute to getting things happening with the shims

[Dr. Curve]

Sure, me to. Count me in for one if things get going for a stateside production, the thin head gaskests could be done as well and a rear bushing for the rear brake if that is what is needed. I'm game.

[shreddr]

Originally Posted by Dr. Curve

... the thin head gaskests could be done as well ...

thats a new one, who is playing with thin head gaskets?

[1100s nut]

If you increase your oil pressure and you get to high RPM's will the pressure relief valve just bypass some oil to bring it back to spec.?

I don't know just curious. I did not know there was a oil pressure problem. I do know for a fact that increasing oil pressure takes more HP away from the bike.

[com5984]

Originally Posted by markpnb

I'm in Australia and would contribute to getting things happening with the shims

Same here

[AZ-J]

Some have to increase HP, some have to shed weight. My R1200S is plenty enough to get me in to trouble fast

[shreddr]

Originally Posted by AZ-J

Some have to increase HP, some have to shed weight. My R1200S is plenty enough to get me in to trouble fast

there is a big difference between "need" and "want"

you know what you need, I know what I want!

[1100s nut]

So do these bikes have a oil pressure relief valve or not...if so will the increased oil pressure get bypassed? Just curious as to why this mod in necessary.

[shreddr]

Originally Posted by shreddr

for thos who have not seen the oil pump modification:

http://forums.pelicanparts.com/bmw-r1100s-r1200s-tech-forum/634322-dohc-gs-hp2s-horsepower-8.html#post6407733





I assume it is part # 2 and 3 that are the 1mm thicker items and a 1mm thick "gasket" needs to be fashioned (laser cut) out of aluminum. Ordering the rotors is simple enough, but I am not sure who can make me the laser gasket.

As I looked through the manual to see what this mod entails it is not pretty! Basically every pulley, sprocket and chain on the front of the engine needs to come off to get to the oil pump (1 pulley, 1 belt, 2 cogs, 2 gears, and 1 chain) although I hear 10% more oil flow from the advocates of the mod I wonder whether this is necessary. Does 10% more flow mean cooler oil, and if so would a bigger cooler be a better and easier mod. Or is the greater flow meant to address an oil insufficiency, which seems unlikely. I am wondering if the added flow is more like an insurance policy than a solution for a known problem. It seems like BMW could have easily incorporated this mod in the HP2S as they already perceived the need in the GS. Perhaps because the GS is spending more time at peak torque, whereas the HP2S spends more time at peak power they didn't see the need. I am confused! All I know is that I don't want to pull all that stuff off the front of the motor if the benefit is a "maybe"

[Droptarotter]

Jeff;
For running on the street and with the power output you have with your bike, I don't think it is necessary.

But if you are running on the track with a motor as strong as what Fralind has, then I think this mod is a must......it's typical old school hot rod stuff.......and needed when you are getting the 30-50% more horsepower that our German buddies are putting to the ground.

More oil volume/more oil pressure are needed to keep the bike cool, the two are best hand in hand.

I think I got 5-8 more horsepower with the PCV than stock........so I am going to leave mine alone!

Hope I got that right with only having one coffee!

Cheers

[1100s nut]

I think there are two thoughts on cooling. More volume through the cooler does not cool more because it does not spend enough time in the cooler for the heat to be pulled away. You need more surface. On the dirt side some guys have put in higher vol. water pumps and i have heard it does not help. I put a fan on my ktm 300... It comes on every now and then....big long hill climbs....I thought it would have ran more.

But this mod does nothing to increase volume on the cooling side.

[AZ-J]

I have ridden in the summer here in 110 F. The R runs warmer but does not overheat.

[shreddr]

Originally Posted by Droptarotter

Jeff;
For running on the street and with the power output you have with your bike, .......and needed when you are getting the 30-50% more horsepower that our German buddies are putting to the ground.

133HP stock, 152HP my big bore = 15% increase so I guess I am in good shape.

I don't know who is getting 50% over, much less 30%

30% over is 172HP, the most I saw out of any of the Germans was about 160HP.

It also occurs to me that the GS motors have a lower peak rpm, so perhaps they need more flow at the lower rpm's that they operate at

[Droptarotter]

I never said I was good with math!

Cheers

[omg1010]

As said before if the engine output is being stretched (tuning AND often driven at high rev) the crankshaft starts to slightly bend. As a result the conrods tilt against the crankshaft and the lubricating oil film is being squeezed out of the conrod bearings. No lube -> conrod bearings fail ... Increased oil-flow helps to prevent this.

That's the whole secret. Certainly the more the engine is being stretched to the limits the more one has to do to prevent failure.

These informations/findings are not coming from fralind but from user Rika back here in Germany (as Jeff might know).

Brgds
Oliver