What to do next

WickedNy · 01-11-2016, 01:53 PM

As soon as spring rolls around, plan on doing vcg and ohg, but def wanted to start the season off with a decent mod...definable doing the rogue ssk, but undecided on either changing out the diff or biting the bullet and going for the ss headers and aa tune. I can get a 3.64 for relatively cheap (100) but really want the 3.73 which I've found for around 450. Which would you guys recommend? Also any info on when the next avail sale on the ss headers would be since I missed Black Fridays?

gas-can · 01-11-2016, 03:31 PM

Honestly, I'd think that you would go faster if you just burned that money instead. I'm really suspicious of any gains a tune may actually get you, since this is not a forced induction engine. Similar thoughts on the headers (though that may get negligible gains)...

The higher diff would obviously increase acceleration, but if you do any track work, it might be worthwhile upgrading directly to an LSD. This is, of course, quite a bit more expensive...

One man's opinion...
-gc

WickedNy · 01-11-2016, 04:04 PM

I'd have to say that removing the restrictive cats and opening up with just the headers would yield some gains, I'm not expecting to get astronomical gains, just an extra kick plus the extra growl wouldn't hurt. As far as the tune goes it would be more to just get the most out of what's there and remove the CEL, and again wouldn't be expecting anything neck breaking. If I were to get the diff, then eventually would work in the lsd in the near future, but input appreciated

Steeler · 01-11-2016, 05:16 PM

Do the rear diff, best bang for the buck

WickedNy · 01-13-2016, 04:53 AM

Also just thought about possibly doing the bmw motor mounts or vibra technic mounts with the re tranny mounts, any knowledge of the degree of difficulty to install these?

StickMon · 01-13-2016, 02:52 PM

The most complicated parts of the job are pulling the intake box and getting to the nuts on top of the trans mounts.
Not a difficult job. Took me about 4-5 hours, but I doodle around a lot.
Get a replacement gasket for the air injector on the exhaust side.
With the air injector in place you can't get the heat shield off the exhaust side, which makes it trickier to torque the motor mount top nut.
I didn't have a gasket so I was afraid to take mine off, lest the gasket turn to crumbs.

While you're at it, you'll want to put some 10.9 bolts and Nord-Locks in the motor mount brackets.

WickedNy · 01-13-2016, 03:53 PM

Wondering if there's any difference between the si and m install, also are nuts and bolts required or just an added benefit?

Steeler · 01-13-2016, 04:05 PM

I could be wrong but I believe the M and the non M is a different arrangement for the motor mounts. The trans mounts are the same.

The motor mounts on my 3.0i were relatively easy to do. I do not have the stock air box mind you. You do need to jack up the motor to remove the old mount and put in the new.

Check out the Megan mounts. I have those installed, the quality is very good.
http://www.meganracing.com/products/...=1329&catid=93

inTgr8r · 01-13-2016, 04:25 PM

m & non-M motor mounts are the same

Steeler · 01-13-2016, 04:34 PM

What are the bolts that people talk about replacing?

inTgr8r · 01-13-2016, 06:11 PM

....bolts at the block

StickMon · 01-13-2016, 06:41 PM

Unless you're going to jack the motor a heck of a way up to replace the mounts you're going to be removing those bolts anyway.
Might as well put some new and better ones back in.
They're about a buck a piece.

Steeler · 01-13-2016, 08:00 PM

Quote:

Originally Posted by inTgr8r

....bolts at the block

Thanks Ian, I had read of the M cars having issues with these but not non M.
Seeing as I have my brackets out right now I will replace with high grade hardware.

WickedNy · 01-14-2016, 04:32 AM

Awesome info. I've got my work cut out for me this spring

. So far my list includes: vcg & ohg, rogue ssk and tran mounts, vibra engine mounts, 3.73 diff, and front h&r sway bar. Now all that's needed iswarm weather

TennesseeZ4 · 01-15-2016, 09:16 PM

I learned many lessons while racing SCCA, one of the more valuable was the installation of the Quaife differential. If you upgrade the diff, go Quaife. The difference is noticeable in exit power, simply no comparison to a locked or off the shelf LSD. Diff life was excellent and the wear patterns on tear down were negligible. That is my $3,000 worth today, and no, i did not win the lottery.

WickedNy · 01-15-2016, 11:23 PM

Diff upgrade will def be in the near future, but that wil be next springs to do list

pokeybritches · 01-16-2016, 09:22 AM

Why 3.73? It's very aggressive for a street car. 3.64 is actually on the aggressive side.

WickedNy · 01-16-2016, 10:23 AM

In part bc I don't really hit that high of speeds on my spirited drives, mostly quick accelerations on an open road and feel that I wouldn't notice that big of a difference from the 3.46 to 3.64...but that's just me assuming prior to having felt the actual difference amongst them.

pokeybritches · 01-16-2016, 03:44 PM

Ah, I didn't see that you had an si coupe (3.46). I bought my latest diff from a 3.0si track car, who moved to a 3.73. I felt the 3.64 was very aggressive, but then again I'm FI with raised boost.

I need to put together a review. For a street car, the Quaife is the way to go. I've got a wheel speed sensor out and DSC is disabled, so I've spent some time testing without the driver aids. I feel like the car could easily handle another 100 horsepower without overwhelming the tires. I was concerned the limits would be higher but the cost of exceeding them (both rear wheels spinning) would be such that the car would suddenly bite you, but honestly you would have to be ignoring every signal the car is giving you to make something dramatic happen. Rear end grip is amazing, both straight line and when powering out of corners. It may be because it's still new to me, but I like this diff more than the trick M diff.

3002 tii · 01-23-2016, 01:17 PM

You and I should hit up dyno, then we'll see what exactly you gain from headers and tune and you can decide for yourself.

WickedNy · 01-23-2016, 01:20 PM

Id definitely be down for that come spring

Punisher3.0si · 01-23-2016, 04:06 PM

Hey WickedNy is that your Z for your avatar? If it is what kind of rims are those? They look really good on it.

01-11-2016, 01:53 PM	#1
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	As soon as spring rolls around, plan on doing vcg and ohg, but def wanted to start the season off with a decent mod...definable doing the rogue ssk, but undecided on either changing out the diff or biting the bullet and going for the ss headers and aa tune. I can get a 3.64 for relatively cheap (100) but really want the 3.73 which I've found for around 450. Which would you guys recommend? Also any info on when the next avail sale on the ss headers would be since I missed Black Fridays?
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01-11-2016, 03:31 PM	#2
gas-can Second Lieutenant 25 Rep 204 Posts Drives: 2006 3.0i Roadster Join Date: Oct 2012 Location: USA iTrader: (0)	Honestly, I'd think that you would go faster if you just burned that money instead. I'm really suspicious of any gains a tune may actually get you, since this is not a forced induction engine. Similar thoughts on the headers (though that may get negligible gains)... The higher diff would obviously increase acceleration, but if you do any track work, it might be worthwhile upgrading directly to an LSD. This is, of course, quite a bit more expensive... One man's opinion... -gc
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01-11-2016, 04:04 PM	#3
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	I'd have to say that removing the restrictive cats and opening up with just the headers would yield some gains, I'm not expecting to get astronomical gains, just an extra kick plus the extra growl wouldn't hurt. As far as the tune goes it would be more to just get the most out of what's there and remove the CEL, and again wouldn't be expecting anything neck breaking. If I were to get the diff, then eventually would work in the lsd in the near future, but input appreciated
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01-11-2016, 05:16 PM	#4
Steeler Colonel 2429 Rep 2,704 Posts Drives: Built not Bought 04 Z4 VF Join Date: Feb 2013 Location: Kitchener Ontario Canada iTrader: (2)	Do the rear diff, best bang for the buck __________________ W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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01-13-2016, 04:53 AM	#5
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	Also just thought about possibly doing the bmw motor mounts or vibra technic mounts with the re tranny mounts, any knowledge of the degree of difficulty to install these?
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01-13-2016, 02:52 PM	#6
StickMon My other car is on Mars 636 Rep 3,124 Posts Drives: 2006 MR Join Date: Feb 2011 Location: Lo-Cal iTrader: (1)	The most complicated parts of the job are pulling the intake box and getting to the nuts on top of the trans mounts. Not a difficult job. Took me about 4-5 hours, but I doodle around a lot. Get a replacement gasket for the air injector on the exhaust side. With the air injector in place you can't get the heat shield off the exhaust side, which makes it trickier to torque the motor mount top nut. I didn't have a gasket so I was afraid to take mine off, lest the gasket turn to crumbs. While you're at it, you'll want to put some 10.9 bolts and Nord-Locks in the motor mount brackets. __________________ Warning: May contain traces of nuts.
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01-13-2016, 03:53 PM	#7
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	Wondering if there's any difference between the si and m install, also are nuts and bolts required or just an added benefit?
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01-13-2016, 04:05 PM	#8
Steeler Colonel 2429 Rep 2,704 Posts Drives: Built not Bought 04 Z4 VF Join Date: Feb 2013 Location: Kitchener Ontario Canada iTrader: (2)	I could be wrong but I believe the M and the non M is a different arrangement for the motor mounts. The trans mounts are the same. The motor mounts on my 3.0i were relatively easy to do. I do not have the stock air box mind you. You do need to jack up the motor to remove the old mount and put in the new. Check out the Megan mounts. I have those installed, the quality is very good. http://www.meganracing.com/products/...=1329&catid=93 __________________ W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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01-13-2016, 04:25 PM	#9
inTgr8r Lieutenant General 2429 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	m & non-M motor mounts are the same __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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01-13-2016, 04:34 PM	#10
Steeler Colonel 2429 Rep 2,704 Posts Drives: Built not Bought 04 Z4 VF Join Date: Feb 2013 Location: Kitchener Ontario Canada iTrader: (2)	What are the bolts that people talk about replacing? __________________ W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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01-13-2016, 06:11 PM	#11
inTgr8r Lieutenant General 2429 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	....bolts at the block __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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01-13-2016, 06:41 PM	#12
StickMon My other car is on Mars 636 Rep 3,124 Posts Drives: 2006 MR Join Date: Feb 2011 Location: Lo-Cal iTrader: (1)	Unless you're going to jack the motor a heck of a way up to replace the mounts you're going to be removing those bolts anyway. Might as well put some new and better ones back in. They're about a buck a piece. __________________ Warning: May contain traces of nuts.
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01-14-2016, 04:32 AM	#14
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	Awesome info. I've got my work cut out for me this spring . So far my list includes: vcg & ohg, rogue ssk and tran mounts, vibra engine mounts, 3.73 diff, and front h&r sway bar. Now all that's needed iswarm weather
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01-15-2016, 09:16 PM	#15
TennesseeZ4 Enlisted Member 5 Rep 46 Posts Drives: 2003 Z4 3.0i; six speed manual Join Date: Nov 2012 Location: Nashville, TN iTrader: (0)	Quaife LSD I learned many lessons while racing SCCA, one of the more valuable was the installation of the Quaife differential. If you upgrade the diff, go Quaife. The difference is noticeable in exit power, simply no comparison to a locked or off the shelf LSD. Diff life was excellent and the wear patterns on tear down were negligible. That is my $3,000 worth today, and no, i did not win the lottery.
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01-15-2016, 11:23 PM	#16
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	Diff upgrade will def be in the near future, but that wil be next springs to do list
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01-16-2016, 09:22 AM	#17
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]	Why 3.73? It's very aggressive for a street car. 3.64 is actually on the aggressive side. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
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01-16-2016, 10:23 AM	#18
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	In part bc I don't really hit that high of speeds on my spirited drives, mostly quick accelerations on an open road and feel that I wouldn't notice that big of a difference from the 3.46 to 3.64...but that's just me assuming prior to having felt the actual difference amongst them.
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01-16-2016, 03:44 PM	#19
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]	Ah, I didn't see that you had an si coupe (3.46). I bought my latest diff from a 3.0si track car, who moved to a 3.73. I felt the 3.64 was very aggressive, but then again I'm FI with raised boost. I need to put together a review. For a street car, the Quaife is the way to go. I've got a wheel speed sensor out and DSC is disabled, so I've spent some time testing without the driver aids. I feel like the car could easily handle another 100 horsepower without overwhelming the tires. I was concerned the limits would be higher but the cost of exceeding them (both rear wheels spinning) would be such that the car would suddenly bite you, but honestly you would have to be ignoring every signal the car is giving you to make something dramatic happen. Rear end grip is amazing, both straight line and when powering out of corners. It may be because it's still new to me, but I like this diff more than the trick M diff. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
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01-23-2016, 01:17 PM	#20
3002 tii Lieutenant General 2282 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	You and I should hit up dyno, then we'll see what exactly you gain from headers and tune and you can decide for yourself. __________________ Follow for latest mods
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01-23-2016, 01:20 PM	#21
WickedNy Get Some 225 Rep 759 Posts Drives: 07 Z4 3.0si Join Date: Jan 2012 Location: Long Island iTrader: (1) Garage List 07 z4 3.0si [0.00]	Id definitely be down for that come spring
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01-23-2016, 04:06 PM	#22
Punisher3.0si Second Lieutenant 28 Rep 204 Posts Drives: 2007 E86 manual Join Date: Jan 2016 Location: Illinois iTrader: (0)	Hey WickedNy is that your Z for your avatar? If it is what kind of rims are those? They look really good on it.
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