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BMW 3-Series (E90 E92) Forum
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320si intermittent starting problem
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| 09-20-2010, 06:54 AM | #243 | |
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Drives: E92, 335i
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Anywayz, anyone knows what muffler (exhaust) this Si model has by default? I was wondering if i can have more sound coming from my car... =) |
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| 09-21-2010, 07:04 AM | #244 | |
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The exhaust on the SI has the same center section as the standard 320i and I think also the back box is the same but the header is different so you wont get any sound change.... for better sound go for a custom stainless steel exhaust by one of the reputable companies and they can actually tune the sound to your liking!!! The Liner replacement is underway !!! the guy from the engineering company just called me and he expects to have the block back to me quite soon... cannot wait  )))) |
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| 09-23-2010, 02:23 PM | #245 | |
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The centre section will probably be unique too. The rear silencer has a very short pipe exit. When it was run on the rolling road they couldn't use the standard exaust sensor they had to use a motorsport sensor - was told it was unusual for a BMW standard exhaust. Agree that you should go for a custom stainless steel -it might be a bit tiring for autobahn driving though. The car creates one hell of a noise at 100mph+. You need to hear it singing at that speed.
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Long gone -15 Peugeot 308 2.0HDi GT AUTO Magnetic Blue, 10 BMW F10 520D SE Xirallic Imperial blue/Cinnamon Brown, 06 E90 320si - Le Mans Blue - Totally standard specification (Scrapped RIP 12/08/2010), 00 Peugeot 306 2.0 SE Cabriolet, 94 Rover 214 SEi, 91 Fiat Uno 60S Mk2 |
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| 09-23-2010, 03:55 PM | #246 |
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Check this out..
Rear Silencer... Part 18107549428 (Rear silencer) was found on the following vehicles: E90: Details on E90 E90 316i Saloon, Europe E90 318i Saloon, Europe E90 320i Saloon, Europe E90 320si Saloon, Europe E91: Details on E91 E91 318i Touring, Europe E91 320i Touring, Europe Mid Section... Part 18307582074 (Exhaust pipes with primary silencer) was found on the following vehicles: E90: Details on E90 E90 320i Saloon, Europe E90 320si Saloon, Europe E90N: Details on E90N E90N 320i Saloon, Europe E91: Details on E91 E91 320i Touring, Europe E91N: Details on E91N E91N 320i Touring, Europe E92: Details on E92 E92 320i Coupé, Europe E92N: Details on E92N E92N 320i Coupé, Europe E93: Details on E93 E93 320i Convertible, Europe E93N: Details on E93N E93N 320i Convertible, Europe Exhaust Manifold with Catalytic Converter... Part 18407552947 (Rmfd exhaust manifold with catalyst) was found on the following vehicles: E90: Details on E90 E90 320si Saloon, Europe STAINLESS STEEL ALL THE WAY .....  |
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| 09-24-2010, 01:32 AM | #247 | |
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 And basically from this, all the way to the rear is the same with most 320i and the rest. This manifold basically gives way better engine breathing.
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| 09-25-2010, 11:58 AM | #248 | |
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The exit pipe is defo different so it can't be the same.
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Long gone -15 Peugeot 308 2.0HDi GT AUTO Magnetic Blue, 10 BMW F10 520D SE Xirallic Imperial blue/Cinnamon Brown, 06 E90 320si - Le Mans Blue - Totally standard specification (Scrapped RIP 12/08/2010), 00 Peugeot 306 2.0 SE Cabriolet, 94 Rover 214 SEi, 91 Fiat Uno 60S Mk2 |
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| 09-26-2010, 05:18 AM | #250 |
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And the si also makes a ticking noise when the whole exhaust system is cooling down, something that the 320i doesn't. This ticking noise really reminds me of an M5 a friend has.
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| 09-30-2010, 02:41 PM | #252 |
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Thanks for the replies...
I wonder if this (for example) http://www.eustips.com/Image/popup/974-SCYK.jpg would give me more sound? My first option would probably be this one: http://www.supersprint.com/ita/SPP2000000980306.asp , but it´s too expensive at the moment. / Tommi |
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| 10-06-2010, 05:56 AM | #253 | |
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I was thinking about adding only twin tail pipe to my car. But, because the pipe is so darn short, i havent found the correct one to buy yet. Twin tail pipes lenght seems to be something between 240 mm and 260 mm. I also want one without the need to weld, because there are pipe tips that will have to be mounted by pushing it over the original tail-pipe (just like 320Si have right now). Adding two tail pipes instead of one can´t be this hard can it? Edit: I found this regarding Si´s exhaust: http://bmwfans.info/parts/catalog/E9...xhaust_system/ / Tommi Last edited by Tommi; 10-06-2010 at 07:22 AM.. |
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| 10-10-2010, 05:33 PM | #254 |
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Engine Block Modifications :))
As Promised guys... here are some pics showing the changes made to the engine liners which have been replaced with special iron ones and the pistons upgraded...
We opted to make the liners thicker to withstand prolonged use and used higher spec continous piston rings and ligher pistons. The pictures speak for themself .. you can see the increased thickness of the new liner compared to the old one and we decided to engineer and over lap between cylinders to make sure the liners are supporting each other which strengthens the engine structure... The picture are before skimming the block or honning the cyliners so never mind the levels they will be all be spot on when it is finished. The key thing we had to do is to rebuild it to BMW manufacturing spec as far as measurements is concerned and we achieved that spot on as well... All spec from BMW TIS system. The Head is not receiving much focus as theere was nothing wrong with it anyways but it has been fully cleaned and rebuilt.. will post some more pics of it... Expect it to be running in 2 weeks time :-)) Last edited by Detox; 10-10-2010 at 05:41 PM.. |
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| 10-23-2010, 06:03 AM | #255 |
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Hmm interesting to see the new ones. In the pics the new liners look thicker.
The car should have had its first run by now then.....
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Long gone -15 Peugeot 308 2.0HDi GT AUTO Magnetic Blue, 10 BMW F10 520D SE Xirallic Imperial blue/Cinnamon Brown, 06 E90 320si - Le Mans Blue - Totally standard specification (Scrapped RIP 12/08/2010), 00 Peugeot 306 2.0 SE Cabriolet, 94 Rover 214 SEi, 91 Fiat Uno 60S Mk2 |
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| 10-23-2010, 08:40 AM | #256 |
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Absolutely, they are about double the thickness with an overlap in between to add strength to the block...
The engine is now fully rebuilt and waiting to go in the car this week.... Will post some pics of the rebuild.... This engine is very unique and took alot of time and patience to built.. i would say that it is not possible to complete such a job without having the Technical details from BMW which we used heavily for the machining work and the assembly, torquing, etc... The timing is also tricky as you have to time the head and balancer shafts at the bottom of the engine as well .... I will post pics shortly and a video of it running when it is all done.. Another thing worth noting is that the bottom end balance shafts were out of tune when we took them off which indicates that they have not been put on correctly!!! so much for BMW service!! Last edited by Detox; 10-23-2010 at 05:10 PM.. Reason: Adding Pictures... |
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| 10-23-2010, 05:13 PM | #257 |
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Pictures posted....
You could see the major steps of the engine block and head being ready for assembly then timing and the final product.... one upgraded N45B20 Engine ready to go in the car Dyno next !! |
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| 10-24-2010, 12:20 PM | #258 | |
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 I think that if something happens to my 320si I'll send it over to you and then drive all the way back to run it in. Talking about it...this engine now needs to be broken into, correct? Never dyno'd my car...wonder what's the real hp/torque on my car.  Changing the cylinder liners with thicker ones, would that have a negative affect on power?
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| 10-24-2010, 05:39 PM | #259 | |
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Great when someone appreciates the workmanship that has gone into this The engine will need a break in period and an oil and filter change after the first 500 miles then after 1500 to make sure any minor debris are washed off then the normal 1500 break in change... I will see how much come out but I am expecting some gains so fingers crossed :-)) The thicker liners wont affect the power either way as the piston rings dont actually drag significantly on them in operation as the oil is in between, the key thing is that the liners and the piston rings match and are made of compatible materials... the new liners will add to the strength and longevity of the engine (especially with the overlap) so it will now last for a loooooooooong time.. Gasket permitting we can turbo charge the engine and do all sorts with this liner piston combination to significantly increase thee horsepower but this is not what I am aiming for with this build... After the machineing work, I am expecting an minor increase in the compression ratio which will add to the power a little but not sure how much... we will see when we dyno it )You are welcome to come over anytime mate... After completing the testing, I will be able to offer this repair package to all 320si owners... I am sure we have some stuck people out there !!! |
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| 10-24-2010, 05:52 PM | #260 |
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Thats a superb rebuild. Fantastic effort, and congratulations on figuring the VANOS and balance shafts out, cos that takes some skill.
Its great to see work like this done, all i ever do is take an engine out, and put a replacement in. |
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| 10-25-2010, 01:54 AM | #261 | |
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I wish I could come mate...I am located in Athens, Greece 
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| 10-25-2010, 09:56 AM | #262 | |
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Then I can come over there  Really, if you run into problems then you can always take out the engine and I can organise a shipping company to collect from you then deliver it back when the work is done... Hope you wont need it though!! |
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| 10-25-2010, 10:00 AM | #263 | |
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The timing is an absolute pain but with the BMW special tools and technical details all is possible.... I was actually worried about the gasket thickness needed after the machining but we took off very little that it was not a problem and BMW were quite good in that you can vary the relation between the crank and the timing sprocket to be able to get it spot on... took a while but we now know what needs to be done... Fingers crosses it starts with no problems... aiming to get it in tomorrow ... wish me luck guys !!! |
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| 10-26-2010, 01:19 AM | #264 | |
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I'll be cheaper I think
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