Z4 3.0si Headers

Aries326 · 05-29-2014, 05:05 PM

So, there's a guy on FB who installed N52 headers built for the e90/92. Here's the dyno without headers, with headers and with headers with tune. 283hp.

WickedNy · 06-05-2014, 10:32 AM

Was it a straight install or was there some fabrication to get them to work?

Aries326 · 06-05-2014, 03:07 PM

The guy said it took some fabrication.

3002 tii · 06-05-2014, 11:10 PM

Peak hp on dyne doesn't mean much since every dyno baseline will vary. The delta is what's most important and 22hp is pretty darn good.

There's a guy on e90post (sn: TSM330i) that drives a Z4 3.0si race car and he has Supersprint headers -- those are the only direct fit ones I know of. I have thought about SS headers for a while but emissions is too much of a b*tch to deal with.

jmilt13 · 07-30-2014, 09:08 PM

any pictures or links?

Aries326 · 08-01-2014, 06:28 PM

Quote:

Originally Posted by jmilt13

any pictures or links?

It was some guy in europe. He didn't provide pictures of his headers. If you have the stomach for it, you can try to joint the Z4 owners group on FB and try to contact the guy for more info. This is probably hundreds of posts ago.

pokeybritches · 08-02-2014, 09:54 AM

I don't trust one-off dynos, because so many put in their own correction factors to read whatever they'd like. Wheel horsepower, on a Dynojet, with SAE correction factor, is my preferred standard. That's not to say other dynamometers aren’t as accurate, but a Dynojet is common and results are replicable. Otherwise, you get a bunch of guys claiming, “Well x dyno reads lower than a Dynojet, so on a Dynojet I would have 50 more horsepower…”

I agree that the delta is what matters. It’s about % difference, not just the actual horsepower numbers. Throwing in a different correction factor can inflate the numbers and therefore the horsepower gain. And the graphs should show multiple runs with each setup. There was ~8 horsepower difference between my first and third (worst and best) runs on my non-M.

Taskmaster · 08-04-2014, 07:41 PM

Mre info on this?

Aries326 · 08-11-2014, 01:05 PM

I wish I had more info, but this is the best info we have. The guy used a header from a N52 made for a 328. He had to have it customized so it would fit his Z. SuperSprint makes one for the Z that is a direct fit.

3002 tii · 08-11-2014, 01:20 PM

Quote:

Originally Posted by Aries326

I wish I had more info, but this is the best info we have. The guy used a header from a N52 made for a 328. He had to have it customized so it would fit his Z. SuperSprint makes one for the Z that is a direct fit.

Direct fit to manifold, NOT to section 1. You have to buy their high flow (secondary) cats if you want a pnp system or have an exhaust shop build you custom piping to get everything to mate up. Btw those 2ndary cats from Supersprint are even MORE expensive than the headers lol.

05-29-2014, 05:05 PM	#1
Aries326 Lieutenant Colonel 195 Rep 1,530 Posts Drives: 2008 Z4 3.0si, 2013 E92 M3 ZCP Join Date: Aug 2011 Location: NC iTrader: (2) Garage List 2013 E92 M3 [0.00] 2008 BMW Z4 3.0si [9.00]	So, there's a guy on FB who installed N52 headers built for the e90/92. Here's the dyno without headers, with headers and with headers with tune. 283hp. Attached Images __________________
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06-05-2014, 10:32 AM	#2
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]	Was it a straight install or was there some fabrication to get them to work?
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06-05-2014, 03:07 PM	#3
Aries326 Lieutenant Colonel 195 Rep 1,530 Posts Drives: 2008 Z4 3.0si, 2013 E92 M3 ZCP Join Date: Aug 2011 Location: NC iTrader: (2) Garage List 2013 E92 M3 [0.00] 2008 BMW Z4 3.0si [9.00]	The guy said it took some fabrication. __________________
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06-05-2014, 11:10 PM	#4
3002 tii Lieutenant General 2278 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.33] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.33] E82 135is (Retired) [9.46] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.00] E86 Z4 3.0si (Retired) [9.20]	Peak hp on dyne doesn't mean much since every dyno baseline will vary. The delta is what's most important and 22hp is pretty darn good. There's a guy on e90post (sn: TSM330i) that drives a Z4 3.0si race car and he has Supersprint headers -- those are the only direct fit ones I know of. I have thought about SS headers for a while but emissions is too much of a b*tch to deal with. __________________ Follow for latest mods
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07-30-2014, 09:08 PM	#5
jmilt13 Private 19 Rep 86 Posts Drives: 3.0si Coupe Join Date: Oct 2013 Location: Indy iTrader: (0) Garage List 2007 Z4 3.0SI Coupe [9.00]	any pictures or links?
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08-02-2014, 09:54 AM	#7
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 don't trust one-off dynos, because so many put in their own correction factors to read whatever they'd like. Wheel horsepower, on a Dynojet, with SAE correction factor, is my preferred standard. That's not to say other dynamometers aren’t as accurate, but a Dynojet is common and results are replicable. Otherwise, you get a bunch of guys claiming, “Well x dyno reads lower than a Dynojet, so on a Dynojet I would have 50 more horsepower…” I agree that the delta is what matters. It’s about % difference, not just the actual horsepower numbers. Throwing in a different correction factor can inflate the numbers and therefore the horsepower gain. And the graphs should show multiple runs with each setup. There was ~8 horsepower difference between my first and third (worst and best) runs on my non-M. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
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08-04-2014, 07:41 PM	#8
Taskmaster Banned 2465 Rep 9,004 Posts Drives: M235i 6MT / E92 328 Msport 6MT Join Date: Nov 2013 Location: Florida iTrader: (6)	Mre info on this?
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08-11-2014, 01:05 PM	#9
Aries326 Lieutenant Colonel 195 Rep 1,530 Posts Drives: 2008 Z4 3.0si, 2013 E92 M3 ZCP Join Date: Aug 2011 Location: NC iTrader: (2) Garage List 2013 E92 M3 [0.00] 2008 BMW Z4 3.0si [9.00]	I wish I had more info, but this is the best info we have. The guy used a header from a N52 made for a 328. He had to have it customized so it would fit his Z. SuperSprint makes one for the Z that is a direct fit. __________________
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