R50/53 '04 vs. '05 MCS
#1
'04 vs. '05 MCS
Background, we recently went from never having owned a Mini to now owning 2. The wife's is the '05 with 150k miles and appears to be stock as far as I can tell. We've put about 5k on it since June and I've been trying to get caught up on the maintenance (brakes, struts, lower engine mount, etc...)
Mine is the '04 with 85k miles. Only had it about 2 months now, other than basic maintenance I've been focusing on replacing little stuff that's broken or missing. Overall the car is in pretty nice shape.
So here's the deal, the wife's '05 runs like a scalded dog compared to the '04. I understand there's a slight HP bump and the gearing is slightly different, but it's like 2.73 vs. 4.88 gearing and 50hp shot of nitrous type of difference. I slapped the ole bluetooth scanner on both cars today and the wife's car puts out about 10-11 psi boost under full throttle. The '04 maxes out at 8 psi and it seems like the boost comes on much slower. After searching the forums for a bit, it appears the 8 is much lower than what it should be and maybe the BPV is the culprit? Any other thoughts for low boost or things I can check? Looks like I'm going to be googling wiring the BP shut next. Thanks in advance.
Mine is the '04 with 85k miles. Only had it about 2 months now, other than basic maintenance I've been focusing on replacing little stuff that's broken or missing. Overall the car is in pretty nice shape.
So here's the deal, the wife's '05 runs like a scalded dog compared to the '04. I understand there's a slight HP bump and the gearing is slightly different, but it's like 2.73 vs. 4.88 gearing and 50hp shot of nitrous type of difference. I slapped the ole bluetooth scanner on both cars today and the wife's car puts out about 10-11 psi boost under full throttle. The '04 maxes out at 8 psi and it seems like the boost comes on much slower. After searching the forums for a bit, it appears the 8 is much lower than what it should be and maybe the BPV is the culprit? Any other thoughts for low boost or things I can check? Looks like I'm going to be googling wiring the BP shut next. Thanks in advance.
Last edited by studio47; 02-22-2016 at 08:11 AM.
#2
#4
Thanks for the replies. What should the factory boost be? I thought I had read in a different post that it was in the 10-11 range. The pulley is a stamped steal version on the wife's '05, but I understand that it's hard to ID a JCW by site. Anyone have a diameter number for the JCW vs. normal stock diameter? Maybe I can measure in car. No code being set and there's not even any codes stored in the ecu.
Looks to be the by pass valve but you're wifes mini may also have a supercharger pully upgrade which is a commmen mod on these cars. The JCW pully produces about 11LB of boost. There is probably a leak in the system so you may want to check all places that may produce a leak.
#5
A leak is possible. I believe you're right about factory boost. Good thread HERE. Look at post #6 for the same issue as yours and #7 for suggestions.
__________________
Your Trusted Source For DIY and Parts
FREE SHIPPING over $99 click here
MINI Parts | DIY Help | Facebook | Twitter | Instagram | YouTube | Promos
888.280.7799 | 6am - 5pm PST
FREE SHIPPING over $99 click here
MINI Parts | DIY Help | Facebook | Twitter | Instagram | YouTube | Promos
888.280.7799 | 6am - 5pm PST
#7
__________________
Your Trusted Source For DIY and Parts
FREE SHIPPING over $99 click here
MINI Parts | DIY Help | Facebook | Twitter | Instagram | YouTube | Promos
888.280.7799 | 6am - 5pm PST
FREE SHIPPING over $99 click here
MINI Parts | DIY Help | Facebook | Twitter | Instagram | YouTube | Promos
888.280.7799 | 6am - 5pm PST
Trending Topics
#8
I wouldn't get a DT BPV for a street car. It uses a much stiffer spring than OE, allowing the car to stay in boost at less throttle. This can do a number on your gas mileage.
#9
Thanks for the replies. What should the factory boost be? I thought I had read in a different post that it was in the 10-11 range. The pulley is a stamped steal version on the wife's '05, but I understand that it's hard to ID a JCW by site. Anyone have a diameter number for the JCW vs. normal stock diameter? Maybe I can measure in car. No code being set and there's not even any codes stored in the ecu.
https://www.northamericanmotoring.co...-2004-r53.html
__________________
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
Thread
Thread Starter
Forum
Replies
Last Post
bcriverjunky
MINI Parts for Sale
8
02-25-2016 03:21 PM
Semaphore
R56 :: Hatch Talk (2007+)
13
01-26-2016 07:58 AM