mrrpm bigbore kit 1150cc

**MRRPM** · 01-23-2012, 02:31 PM

Quote: Originally Posted by miller48

mrrpm what is it going to take for you to install your cams and try out the pc5 fuel control box? allot of people wanting more power?

Getting my Commander outta limp. No reason to really, I'm developing parts as we speak for the same engine in the ATV. Obviously, the engine doesn't care what it's in.

**MRRPM** · 01-23-2012, 02:33 PM

Quote: Originally Posted by USAGUY

The chase for power is resting with solving the throttle body restriction anyone know how to fix this issue?

To be clear, the throttle body isn't a restriction, it's the fact that you do not have direct control, the ecu does.

Fixing it is easy, just buy & install a stand alone throttle controller, and standalone ecu, problem solved, and no need for a Powercommander, at all.

joshuabuilt · 01-23-2012, 02:43 PM

Quote: Originally Posted by MRRPM

Quote: Originally Posted by USAGUY

The chase for power is resting with solving the throttle body restriction anyone know how to fix this issue?

To be clear, the throttle body isn't a restriction, it's the fact that you do not have direct control, the ecu does.

Fixing it is easy, just buy & install a stand alone throttle controller, and standalone ecu, problem solved, and no need for a Powercommander, at all.

MRRPM have u flowed the tock heads to see what CFM they are getting?

**MRRPM** · 01-23-2012, 02:54 PM

Quote: Originally Posted by joshuabuilt

MRRPM have u flowed the tock heads to see what CFM they are getting?

Yes, but I didn't write down the numbers. Flow isn't too important, making power, is.

joshuabuilt · 01-23-2012, 03:02 PM

Quote: Originally Posted by MRRPM

Quote: Originally Posted by joshuabuilt

MRRPM have u flowed the tock heads to see what CFM they are getting?

Yes, but I didn't write down the numbers. Flow isn't too important, making power, is.

but if they are only flowing say "40" cfm and you are bumping up the intake throttle body and exhaust capabilities wouldnt the head be holding it back?

**MRRPM** · 01-23-2012, 03:10 PM

Quote: Originally Posted by joshuabuilt

Quote: Originally Posted by MRRPM

Quote: Originally Posted by joshuabuilt

MRRPM have u flowed the tock heads to see what CFM they are getting?

Yes, but I didn't write down the numbers. Flow isn't too important, making power, is.

but if they are only flowing say "40" cfm and you are bumping up the intake throttle body and exhaust capabilities wouldnt the head be holding it back?

Maybe, maybe not. More CFM does not equal, or guarantee more horsepower. You can increase the flow, and not increase the horsepower, and vice versa. All engines are like this, not just these.

4weeler · 01-23-2012, 07:25 PM

LBR...how is your Muzzy throttle coming along ?How about update.Thxs

LBR · 01-23-2012, 10:11 PM

Quote: Originally Posted by 4weeler

LBR...how is your Muzzy throttle coming along ?How about update.Thxs

Ran great from launch to top end with the cable operated TB and separate fuel / ignition controller...instant throttle response we all are familiar with on a cabled TB..... but the starting and idle characteristics up to about 2500 were definately suffering by standards ....

So then they did some more fiddling to get starting and lower end dialed in and acceptable ....that equated to too much loss of power mid to upper end to please them.....

That's were it's at now ....good news is that they are taking these bumps in the road personally and has stoked their fire to keep going with the project until either they say EUREKA or the Commander's engine does an oil down on their dyno!.....:thumbup:

Sent by my twin-turbo Droid Razr

Spud · 01-23-2012, 11:09 PM

Thanks LBR. Hopefully they will get it figured out It is a major hurdle.

USAGUY · 03-01-2012, 07:04 PM

This was a good thread

01-23-2012, 02:31 PM	#41
MRRPM Official Site Vendor Join Date: May 2010 Location: Denton NC Member #229 Posts: 169 ()	Quote: Originally Posted by miller48 mrrpm what is it going to take for you to install your cams and try out the pc5 fuel control box? allot of people wanting more power? Getting my Commander outta limp. No reason to really, I'm developing parts as we speak for the same engine in the ATV. Obviously, the engine doesn't care what it's in. __________________ http://www.mrrpmcycle.com Home of custom Rotax high performance engine parts! Big bore kits, Cams, Intakes, Valves, Springs, Billet Steel Rods, Aluminum Rods, Billet Jugs, Billet Oil Cooler Adapters, Installation 336-859-4333

01-23-2012, 02:33 PM	#42
MRRPM Official Site Vendor Join Date: May 2010 Location: Denton NC Member #229 Posts: 169 ()	Quote: Originally Posted by USAGUY The chase for power is resting with solving the throttle body restriction anyone know how to fix this issue? To be clear, the throttle body isn't a restriction, it's the fact that you do not have direct control, the ecu does. Fixing it is easy, just buy & install a stand alone throttle controller, and standalone ecu, problem solved, and no need for a Powercommander, at all. __________________ http://www.mrrpmcycle.com Home of custom Rotax high performance engine parts! Big bore kits, Cams, Intakes, Valves, Springs, Billet Steel Rods, Aluminum Rods, Billet Jugs, Billet Oil Cooler Adapters, Installation 336-859-4333

01-23-2012, 02:43 PM	#43
joshuabuilt Senior Member Join Date: Jul 2011 Location: san diego Member #2811 Posts: 667 ()	Quote: Originally Posted by MRRPM Quote: Originally Posted by USAGUY The chase for power is resting with solving the throttle body restriction anyone know how to fix this issue? To be clear, the throttle body isn't a restriction, it's the fact that you do not have direct control, the ecu does. Fixing it is easy, just buy & install a stand alone throttle controller, and standalone ecu, problem solved, and no need for a Powercommander, at all. MRRPM have u flowed the tock heads to see what CFM they are getting? __________________ -Its always something and never nothing - 08 dodge 2500 cumming 4x4 -2011 xt commander -04 trx 450r "for sale"

01-23-2012, 02:54 PM	#44
MRRPM Official Site Vendor Join Date: May 2010 Location: Denton NC Member #229 Posts: 169 ()	Quote: Originally Posted by joshuabuilt MRRPM have u flowed the tock heads to see what CFM they are getting? Yes, but I didn't write down the numbers. Flow isn't too important, making power, is. __________________ http://www.mrrpmcycle.com Home of custom Rotax high performance engine parts! Big bore kits, Cams, Intakes, Valves, Springs, Billet Steel Rods, Aluminum Rods, Billet Jugs, Billet Oil Cooler Adapters, Installation 336-859-4333

01-23-2012, 03:02 PM	#45
joshuabuilt Senior Member Join Date: Jul 2011 Location: san diego Member #2811 Posts: 667 ()	Quote: Originally Posted by MRRPM Quote: Originally Posted by joshuabuilt MRRPM have u flowed the tock heads to see what CFM they are getting? Yes, but I didn't write down the numbers. Flow isn't too important, making power, is. but if they are only flowing say "40" cfm and you are bumping up the intake throttle body and exhaust capabilities wouldnt the head be holding it back? __________________ -Its always something and never nothing - 08 dodge 2500 cumming 4x4 -2011 xt commander -04 trx 450r "for sale"

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01-23-2012, 03:10 PM	#46
MRRPM Official Site Vendor Join Date: May 2010 Location: Denton NC Member #229 Posts: 169 ()	Quote: Originally Posted by joshuabuilt Quote: Originally Posted by MRRPM Quote: Originally Posted by joshuabuilt MRRPM have u flowed the tock heads to see what CFM they are getting? Yes, but I didn't write down the numbers. Flow isn't too important, making power, is. but if they are only flowing say "40" cfm and you are bumping up the intake throttle body and exhaust capabilities wouldnt the head be holding it back? Maybe, maybe not. More CFM does not equal, or guarantee more horsepower. You can increase the flow, and not increase the horsepower, and vice versa. All engines are like this, not just these. __________________ http://www.mrrpmcycle.com Home of custom Rotax high performance engine parts! Big bore kits, Cams, Intakes, Valves, Springs, Billet Steel Rods, Aluminum Rods, Billet Jugs, Billet Oil Cooler Adapters, Installation 336-859-4333

01-23-2012, 07:25 PM	#47
4weeler Senior Member Join Date: Dec 2010 Location: Apache Jct.AZ Member #1515 Posts: 143 ()	LBR...how is your Muzzy throttle coming along ?How about update.Thxs __________________ FST Long travel FST roll cage, top and front bumper Muzzy exhaust digi tune & Wego III K&N Air filter Hid Lights Vision X light bar K&T black box Brakes on all 4 corners CV tech clutch by Air Dam QE diff Wicked Built power steering

01-23-2012, 10:11 PM	#48
LBR Senior Member Join Date: May 2010 Location: Oregon Member #234 Posts: 325 ()	Quote: Originally Posted by 4weeler LBR...how is your Muzzy throttle coming along ?How about update.Thxs Ran great from launch to top end with the cable operated TB and separate fuel / ignition controller...instant throttle response we all are familiar with on a cabled TB..... but the starting and idle characteristics up to about 2500 were definately suffering by standards .... So then they did some more fiddling to get starting and lower end dialed in and acceptable ....that equated to too much loss of power mid to upper end to please them..... That's were it's at now ....good news is that they are taking these bumps in the road personally and has stoked their fire to keep going with the project until either they say EUREKA or the Commander's engine does an oil down on their dyno!.....:thumbup: Sent by my twin-turbo Droid Razr __________________ SaveTheRidersDunes \| Facebook

01-23-2012, 11:09 PM	#49
Spud Senior Member Join Date: Nov 2010 Location: Oceanside Ca Member #1155 Posts: 609 ()	Thanks LBR. Hopefully they will get it figured out It is a major hurdle.

03-01-2012, 07:04 PM	#50
USAGUY Senior Member Join Date: May 2011 Member #2466 Posts: 554 ()	Time This was a good thread

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