Cosworth M2 and MR 02 Housing got 1 extra HP????
something must be off...
when i installed my Cossie cams on an already fully tuned engine i got 15whp increase on average everywhere with a lot of torgue everywhere... ohh and i had the same MR o2 housing...
check the engine step by step again...
when i installed my Cossie cams on an already fully tuned engine i got 15whp increase on average everywhere with a lot of torgue everywhere... ohh and i had the same MR o2 housing...
check the engine step by step again...
Former Sponsor
Joined: Sep 2005
Posts: 984
Likes: 0
From: Chicagoland
Just wanted to chime in here. I am the mechanic that did the work on the car.
I saw the dyno charts and yes, your peak was up only one horsepower but across the board, the car picked up more power. Not nearly what I would expect though.
To clarify:
The hotside was not removed to do the O2 housing. The entire turbo assembly was removed (manifold to factory O2 housing) and the housings were swapped and the assembly was replaced.
The head was not removed to do the springs, retainers, seals and seats. This was done with the head still on the motor.
I also thought it was weird that each cam came in a different box. I assumed that the MIVEC cam was probably machined at a later date (exhaust cam is probably the same as an 8) and possibly in a different box. The really odd part was the bolt that holds the cam position sensor on the exhaust cam bottomed out prior to tightening completely. I ended up removing 1/8" from the bolt to get it to tighten properly.
I can assure you the work was done properly and professionally. I am as interested as you are in finding out why the car is not making power.
I saw the dyno charts and yes, your peak was up only one horsepower but across the board, the car picked up more power. Not nearly what I would expect though.
To clarify:
The hotside was not removed to do the O2 housing. The entire turbo assembly was removed (manifold to factory O2 housing) and the housings were swapped and the assembly was replaced.
The head was not removed to do the springs, retainers, seals and seats. This was done with the head still on the motor.
I also thought it was weird that each cam came in a different box. I assumed that the MIVEC cam was probably machined at a later date (exhaust cam is probably the same as an 8) and possibly in a different box. The really odd part was the bolt that holds the cam position sensor on the exhaust cam bottomed out prior to tightening completely. I ended up removing 1/8" from the bolt to get it to tighten properly.
I can assure you the work was done properly and professionally. I am as interested as you are in finding out why the car is not making power.
I knew you'd chime in!!
I don't think the OP has the right facts or information is going through too many channels.
Good to know the facts from the horse's mouth. (No I am not calling you a horse)
I don't think the OP has the right facts or information is going through too many channels.
Good to know the facts from the horse's mouth. (No I am not calling you a horse)
This is how alot of shops get a bad name honestly.. people bring them parts that are not right the shop installs them and its the shops fault 
.. I wont be shocked if that second cam with out the cosworth mark on it turns out to be some random cam.
.. I wont be shocked if that second cam with out the cosworth mark on it turns out to be some random cam.
Evolving Member
Joined: Dec 2007
Posts: 216
Likes: 1
From: Mesa, Az
Even if one cam was right, that doesnt mean the cars gonna make power. If the cams arent working in conjuction with eachother, chances are it wont have good results. Need to find out what the "oddball" cam was, really.... Ive got cossies in my car, and they both come together(separate boxes, but together), and both boxes are blue. Dunno what else to say???? Id be f****in pised, if it was me 
Keep us posted
Keep us posted
Thread Starter
Evolved Member
Joined: Apr 2007
Posts: 590
Likes: 0
From: Chi-Town
Thread Starter
Evolved Member
Joined: Apr 2007
Posts: 590
Likes: 0
From: Chi-Town
Just wanted to chime in here. I am the mechanic that did the work on the car.
I saw the dyno charts and yes, your peak was up only one horsepower but across the board, the car picked up more power. Not nearly what I would expect though.
To clarify:
The hotside was not removed to do the O2 housing. The entire turbo assembly was removed (manifold to factory O2 housing) and the housings were swapped and the assembly was replaced.
The head was not removed to do the springs, retainers, seals and seats. This was done with the head still on the motor.
I also thought it was weird that each cam came in a different box. I assumed that the MIVEC cam was probably machined at a later date (exhaust cam is probably the same as an 8) and possibly in a different box. The really odd part was the bolt that holds the cam position sensor on the exhaust cam bottomed out prior to tightening completely. I ended up removing 1/8" from the bolt to get it to tighten properly.
I can assure you the work was done properly and professionally. I am as interested as you are in finding out why the car is not making power.
I saw the dyno charts and yes, your peak was up only one horsepower but across the board, the car picked up more power. Not nearly what I would expect though.
To clarify:
The hotside was not removed to do the O2 housing. The entire turbo assembly was removed (manifold to factory O2 housing) and the housings were swapped and the assembly was replaced.
The head was not removed to do the springs, retainers, seals and seats. This was done with the head still on the motor.
I also thought it was weird that each cam came in a different box. I assumed that the MIVEC cam was probably machined at a later date (exhaust cam is probably the same as an 8) and possibly in a different box. The really odd part was the bolt that holds the cam position sensor on the exhaust cam bottomed out prior to tightening completely. I ended up removing 1/8" from the bolt to get it to tighten properly.
I can assure you the work was done properly and professionally. I am as interested as you are in finding out why the car is not making power.
. I believe that AMS in a top notch shop and that's why i picked them to do the work.
Last edited by YzBrad99; May 22, 2008 at 07:14 PM.
did u have tuned? and Ur O2 housing may have boost creep? I got 55+ whp on M3...
u should gain 30+whp... maybe something missed.. if u have stock o2 housing.. get upgrade one or something i missed
u should gain 30+whp... maybe something missed.. if u have stock o2 housing.. get upgrade one or something i missed
Last edited by hanahawaiian; May 20, 2008 at 09:52 PM.
Former Sponsor
Joined: Sep 2005
Posts: 984
Likes: 0
From: Chicagoland
I purchased the Cams from Chris at Nolimit Motorsports in New York, I'm going to call him tomorrow and find out whats what. They said they were taking the head off to do the springs and retainers (ive never heard of anyone doing that but i took their word). I believe that AMS in a top notch shop and that's why i picked them to do the work. It just seems so odd that everyone else is getting great gains, but my car isn't.
At this point, I would lean towards the exhaust cam as being the culprit. It was a little strange that the two cams were packaged differently. I had never seen the blue plastic box the MIVEC cam was packaged in and figured it was probably just a newer cam. I noticed the exhaust cam seemed to have a different protective coating than the MIVEC cam and needed a lot more time to clean prior to install. I was a little put off when the cam sensor bolt bottomed out and did not feel this was Cosi quality. I did not however look for marks or etchings on the cams prior to installing them. I probably should have investigated further but I trusted what was written on the box was what you provided to us to install.
A compression test may not tell us much. I would almost be more inclined to pull the exhaust cam and put it on the Cam Doctor and see if the grind matches what Cosi says it should be.
Evolving Member
Joined: Dec 2007
Posts: 126
Likes: 0
From: MA
As far as gains, I didn't have any increase in peak HP either, but I gained 15ft-lbs and my car pulls like a motha all the way to 8k now. Before I had them installed my HP would fall off at about 6k. I'm actually really happy with the results. I'll post my dyno graph so you guys can check out the smoother, broader power curve from these cams (M2's).
Last edited by No.9; May 22, 2008 at 11:52 AM.
I am sorry for the confusion about the head being / not being removed. Darius is kind of new to AMS and may not be entirely familiar with what goes on in the shop as he is stuck in the sales office all day.
At this point, I would lean towards the exhaust cam as being the culprit. It was a little strange that the two cams were packaged differently. I had never seen the blue plastic box the MIVEC cam was packaged in and figured it was probably just a newer cam. I noticed the exhaust cam seemed to have a different protective coating than the MIVEC cam and needed a lot more time to clean prior to install. I was a little put off when the cam sensor bolt bottomed out and did not feel this was Cosi quality. I did not however look for marks or etchings on the cams prior to installing them. I probably should have investigated further but I trusted what was written on the box was what you provided to us to install.
A compression test may not tell us much. I would almost be more inclined to pull the exhaust cam and put it on the Cam Doctor and see if the grind matches what Cosi says it should be.
At this point, I would lean towards the exhaust cam as being the culprit. It was a little strange that the two cams were packaged differently. I had never seen the blue plastic box the MIVEC cam was packaged in and figured it was probably just a newer cam. I noticed the exhaust cam seemed to have a different protective coating than the MIVEC cam and needed a lot more time to clean prior to install. I was a little put off when the cam sensor bolt bottomed out and did not feel this was Cosi quality. I did not however look for marks or etchings on the cams prior to installing them. I probably should have investigated further but I trusted what was written on the box was what you provided to us to install.
A compression test may not tell us much. I would almost be more inclined to pull the exhaust cam and put it on the Cam Doctor and see if the grind matches what Cosi says it should be.
....thought I saw a pic of one in the Cam test in Turbo Mag.
Last edited by Turbo Kyle; May 21, 2008 at 01:23 PM.
