Dyno trouble shooting session of Z4M ESS VT - 525

Beedub · 08-01-2013, 01:36 PM

should we aim to replace the tensioners every 30k maybe....

gmd2003 · 08-01-2013, 02:13 PM

Quote:

Originally Posted by Beedub

should we aim to replace the tensioners every 30k maybe....

I guess my point is if you are doing something that involves the belts or pulleys and are in that neighborhood why not replace a75 dollar part that could lead to catastrophic failure. Beedub I think they are good for longer than that , but it depends on use. Its easy to tell if you start losing boost and your belt is noticeably loser this is likely the culprit.
George

pokeybritches · 08-01-2013, 04:09 PM

I'm on 101k miles on my original tensioner. No slip, but I'm only doing 6 psi with no track time.

ZStig · 08-01-2013, 06:45 PM

Quote:

Originally Posted by gmd2003

Ha , that's the million dollar question . I think I have the temperature side of things calmed down , fuel delivery is solid after the Aeromotive , colder plugs are in . I think it will be good , but I'm always an optimist .
George

Did you have to get a re-tune after the fuel pump upgrade?

seank · 08-01-2013, 10:59 PM

Not to over run your thread, but thought I would let you know that there were know boost leaks. I will change the tensioner but the belts aren't glazed or make ANY noise

gmd2003 · 08-02-2013, 05:02 AM

Quote:

Originally Posted by seank

Not to over run your thread, but thought I would let you know that there were know boost leaks. I will change the tensioner but the belts aren't glazed or make ANY noise

Hmm , well mine were glazed but I had zero noise . Well I could hear zero noise bc of my RE Diablos lol
George

seank · 08-02-2013, 10:57 PM

Well, I emailed AJ. He said that I had a boost leak or air intake restrictions. I opened up the area around the air intake ( I made a wall that covered 1 inch of the back half of the filter). I pulled 7.3 psi in 3rd and did a pull on a nearly deserted freeway in 4th and got 9.3psi on peak recall. The car nearly scared the hell out of me. I will fabricate something to increase the air to the filter.

exdos · 08-03-2013, 05:42 AM

Quote:

Originally Posted by seank

I pulled 7.3 psi in 3rd and did a pull on a nearly deserted freeway in 4th and got 9.3psi on peak recall.

Why would you get 2 psi more running in 4th gear compared to 3rd?

Beedub · 08-03-2013, 07:02 AM

Quote:

Originally Posted by seank

Well, I emailed AJ. He said that I had a boost leak or air intake restrictions. I opened up the area around the air intake ( I made a wall that covered 1 inch of the back half of the filter). I pulled 7.3 psi in 3rd and did a pull on a nearly deserted freeway in 4th and got 9.3psi on peak recall. The car nearly scared the hell out of me. I will fabricate something to increase the air to the filter.

did you pop the limiter on your 4th gear run?? sounds like youy seeing just over 7lbs of boost but a spike caused by hitting the limiter gace you a high peak reading.... i will see well over 10lbs if i hit the limiter and try to gain a peak recall figure.... hence why on boost reading runs ill shift at 7700....

seank · 08-03-2013, 10:54 AM

Quote:

Originally Posted by Beedub

did you pop the limiter on your 4th gear run?? sounds like youy seeing just over 7lbs of boost but a spike caused by hitting the limiter gace you a high peak reading.... i will see well over 10lbs if i hit the limiter and try to gain a peak recall figure.... hence why on boost reading runs ill shift at 7700....

I am positive I didn't hit the limiter.

It makes sense, considering what the filter, slinky toy does before the super charger

Gt4 · 08-06-2013, 01:34 PM

So when is your next track day schedule? Can't wait to hear back about that limp mode issue.

gmd2003 · 08-06-2013, 08:53 PM

Quote:

Originally Posted by Gtfour

So when is your next track day schedule? Can't wait to hear back about that limp mode issue.

It's on the 17th and 18th . Just figured out what my issue was . I had the wrong sized crank pulley and supercharger pulley . The VT525 is supposed to come with a 135mm crank pulley and a 79mm SC pulley . My kit came with a 130mm crank and an 85mm SC pulley . That is why I had belt slip and only 5psi with no leaks , the tensioner was likely an innocent bystander .
George

seank · 08-06-2013, 09:39 PM

Quote:

Originally Posted by gmd2003

It's on the 17th and 18th . Just figured out what my issue was . I had the wrong sized crank pulley and supercharger pulley . The VT525 is supposed to come with a 135mm crank pulley and a 79mm SC pulley . My kit came with a 130mm crank and an 85mm SC pulley . That is why I had belt slip and only 5psi with no leaks , the tensioner was likely an innocent bystander .
George

This is craziness. I am checking all my pulley sizes tomorrow. Did AJ give you these pulley numbers?

gmd2003 · 08-06-2013, 10:05 PM

Quote:

Originally Posted by seank

Quote:

Originally Posted by gmd2003

It's on the 17th and 18th . Just figured out what my issue was . I had the wrong sized crank pulley and supercharger pulley . The VT525 is supposed to come with a 135mm crank pulley and a 79mm SC pulley . My kit came with a 130mm crank and an 85mm SC pulley . That is why I had belt slip and only 5psi with no leaks , the tensioner was likely an innocent bystander .
George

This is craziness. I am checking all my pulley sizes tomorrow. Did AJ give you these pulley numbers?

Through Roman yes. It seems their fabricator screwed up and made 130mm pulleys instead of 135mm( measured on rib to rib) not external lip. I'd def check your sizes then give them a call, especially if you are still coming up short on boost.
George

seank · 08-06-2013, 10:12 PM

Quote:

Originally Posted by gmd2003

Through Roman yes. It seems their fabricator screwed up and made 130mm pulleys instead of 135mm( measured on rib to rib) not external lip. I'd def check your sizes then give them a call, especially if you are still coming up short on boost.
George

What's the excuse for the super charger pulley? Are they sending the replacements free of charge?

ZStig · 08-06-2013, 10:15 PM

Quote:

Originally Posted by seank

What's the excuse for the super charger pulley? Are they sending the replacements free of charge?

whats the size of your belt?

seank · 08-06-2013, 10:31 PM

Quote:

Originally Posted by ZStig

whats the size of your belt?

My belt or George's?

ZStig · 08-06-2013, 10:46 PM

yours. George's too if he has a 525 kit.

Str8 RippiN · 08-06-2013, 10:59 PM

damn, i just got my 525 upgrade kit last week too, i wonder if i have the right size pullies or not now

do you know if they just caught their mistake or was it something they caught early on?

seank · 08-06-2013, 11:29 PM

Quote:

Originally Posted by ZStig

yours. George's too if he has a 525 kit.

It says 2360, but now George is making me think I may have the wrong size pulleys.

Gt4 · 08-07-2013, 04:29 AM

So anyone know the pulleys size and belt number for the Vt1-445?

gmd2003 · 08-07-2013, 06:45 AM

Quote:

Originally Posted by ZStig

Quote:

Originally Posted by seank

What's the excuse for the super charger pulley? Are they sending the replacements free of charge?

whats the size of your belt?

My belt size is 2334 . They just messed up , and are overnighting me the correct crank pulley as soon as its made (my car is down until then ) . Apparently the 130mm with the 79mm is what the 500 kit used, this the mix up . The first time they sent an 85mm SC pulley so it was way off . I thought my shop messed when they said they had to use a smaller belt, but they didn't . I had just ordered new crank and DC pulleys with a new belt at my own cost bc I wasn't sure and then got the correct SC pulley but the incorrect crank pulley , with the correct belt . So again it didn't fit ( very loose) . When I called ESS and measured everything they figured out the last batch of 135mm pulleys was really 130mm . (They have no correct 135mm in house currently so if you recently got a kit it is likely wrong)
So frustrated right now. They are obviously refunding me the cost of the new belt and pulleys I ordered with shipping .
George.

08-01-2013, 01:36 PM	#23
Beedub Major General 423 Rep 5,327 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	should we aim to replace the tensioners every 30k maybe.... __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
	Appreciate 0 Quote

08-01-2013, 04:09 PM	#25
pokeybritches Colonel 479 Rep 2,782 Posts Drives: ESS/G-Power Z4M, VF Z4, 996tt Join Date: Sep 2009 Location: Los Angeles iTrader: (12) Garage List 2006 BMW Z4M [10.00] 2006 BMW Z4M [8.50] 2003 BMW Z4 3.0i [9.00]	I'm on 101k miles on my original tensioner. No slip, but I'm only doing 6 psi with no track time. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
	Appreciate 0 Quote

08-01-2013, 10:59 PM	#27
seank enthusiast 48 Rep 1,695 Posts Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca iTrader: (4)	Not to over run your thread, but thought I would let you know that there were know boost leaks. I will change the tensioner but the belts aren't glazed or make ANY noise
	Appreciate 0 Quote

08-02-2013, 10:57 PM	#29
seank enthusiast 48 Rep 1,695 Posts Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca iTrader: (4)	Well, I emailed AJ. He said that I had a boost leak or air intake restrictions. I opened up the area around the air intake ( I made a wall that covered 1 inch of the back half of the filter). I pulled 7.3 psi in 3rd and did a pull on a nearly deserted freeway in 4th and got 9.3psi on peak recall. The car nearly scared the hell out of me. I will fabricate something to increase the air to the filter.
	Appreciate 0 Quote

08-06-2013, 01:34 PM	#33
Gt4 Captain 54 Rep 880 Posts Drives: 2006 E46 M3 Estoril blue 6mt Join Date: Jan 2012 Location: Montreal iTrader: (5)	So when is your next track day schedule? Can't wait to hear back about that limp mode issue.
	Appreciate 0 Quote

08-06-2013, 10:46 PM	#40
ZStig instagram 997turbotom 279 Rep 7,376 Posts Drives: Interlagos Z4MR Join Date: Jun 2008 Location: Delray Beach, FL iTrader: (4)	yours. George's too if he has a 525 kit. __________________
	Appreciate 0 Quote

08-06-2013, 10:59 PM	#41
Str8 RippiN First Lieutenant 46 Rep 398 Posts Drives: E46 ZCP ///M3 Join Date: Dec 2011 Location: Pacific Beach iTrader: (4)	damn, i just got my 525 upgrade kit last week too, i wonder if i have the right size pullies or not now do you know if they just caught their mistake or was it something they caught early on? __________________ -Tommy "The Zillenium Falcon" mod journal - http://www.m3forum.net/m3forum/showthread.php?t=440670
	Appreciate 0 Quote

08-07-2013, 04:29 AM	#43
Gt4 Captain 54 Rep 880 Posts Drives: 2006 E46 M3 Estoril blue 6mt Join Date: Jan 2012 Location: Montreal iTrader: (5)	So anyone know the pulleys size and belt number for the Vt1-445?
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search