Hey guys I need your help! Any feedback would be great!
I have a 06 IX RS. Recently I put M3 cosi cams in to find a loss in power and Tq... We did a compression test sure enough low, 100, 125, 125, 100.

So I built the motor via drop in method. After a break in period of 500 miles the car still lacks in power! I cant get near the amount of timing as I could before the build without knocking. Boost is set at 28 psi on 91 octane with 50/50 water,meth (470cc). Messing around with a friend prior to the build I would pull a car easy! Now with 4 people in his car he pulls me by 2 cars!

What are the chances the physical timing of the motor is off a tooth or 2?? I know camed motors need less timing but this much less? I have the Rom and logs if any body wants to take a closer look.

Also I get a CEL P0011 (cam timing over advance) Off and on, tho not consistant.

Current Fuel and Timing map


Current Mivec map


Timing before the build then after


Data Log Lab (lack of power)


LOG


LOG


My current mods are,
TBE
O2 Housing
Manifold
IC Pipes
BOV
Aquamist 2D
Profec B Spec 2 EBC
Apexi intake
Cosworth M3 cams
Cosworth valve springs
Aries pistons (low compression 8.5) Standard 85mm bore
Eagle H rods
Cosworth bearings
Cosworth Head gasket
ARP head studs


Thanks for any constructive feedback!

 

I think you have multiple issues you have to deal with here.
First what caused the compression loss to begin with was it wear or damage from a bad tune?
It's really easy to check the motor timing get a TDC tool and pull the cam gear cover and check it to cylinder #1 vs cam gear timing marks.
Next when you built the motor I'm assuming you built the motor did you check the bore taper to make sure it wasn't to far out at the bottom of the stroke?
How did the pistons look that you replaced did they have a lot of blow by any burnt rings?
What is the condition of your head, valves, seats guides and seals?
Whats do the after build compression numbers look like?
Now about the cam timing remember the mivec is no more than a self adjusting set of cam gears. You have to be careful with the mivec maps. More spread of the gears more top end less spread of the gears the more low end but the cam timing has to be in sync with the mivec tables or you will have problems like power loss. I hope this helps.

Sorry for all the questions just need a few more details.

 

Looking at your power falling off like that i would say your cams may be off a tooth or so.

 

"First what caused the compression loss to begin with was it wear or damage from a bad tune?"
Lots of track days lol tune was good IMO (as well as Mitch @ VIVID)

"It's really easy to check the motor timing get a TDC tool and pull the cam gear cover and check it to cylinder #1 vs cam gear timing marks."
Doing that later this week when we have a open bay

"Next when you built the motor I'm assuming you built the motor did you check the bore taper to make sure it wasn't to far out at the bottom of the stroke? "
It wasnt far at all, Also we could still see the OEM cross hatching very well.

"How did the pistons look that you replaced did they have a lot of blow by any burnt rings?"
Cylinder 1 had some blow by Cylinder 4 had a cracked ringland.

"What is the condition of your head, valves, seats guides and seals? "
They looked really good, nothing out of spec.

"Whats do the after build compression numbers look like?" Also going to do this later when the bay is open...

"Now about the cam timing remember the mivec is no more than a self adjusting set of cam gears. You have to be careful with the mivec maps. More spread of the gears more top end less spread of the gears the more low end but the cam timing has to be in sync with the mivec tables or you will have problems like power loss. I hope this helps. "
^^^Thanks

"Sorry for all the questions just need a few more details." Not a problem any help or ideas are welcome...

 

Could it also cause the abilty to add timing more difficult?

 

Yes

 

Your intake cam is probably off at the least. If it was advanced by one tooth, then the code may be coming up whenever it hits the 28.8 cells in the mivec table.

 

Thanks guys... I checked it... Sure enough, 2 degrees on the cams and 2 degrees on the crank. So 4 degrees total. makes sense now. Thanks for all the replys.

 

sweet dude! Keep us informed!