arentz07

I don't see how it could be a performance gain. Wouldn't the hole allow hot air in from the engine bay?

Solara350

Deleting mufflers will improve exhaust flow and reduce engine back-pressure, therefore power loss at low rpm but gains like 1-3HP at high RPM like 5000RPM ! dude I don't spread misinformation and stop hating, you guys do TRACK is different to the street, are you gonna do 5000RPM all the time on the street ? in slow traffic too ? I still have my deleted mufflers in my garage bought them from Ebay, and tried them on my RC350 and I felt LIKE SHY-T also i don't need to show you anything you call Jason and Scott and ask them, everyone can Google nowadays.
You're a racer, not an Engineer right ? you don't explain but always jump to the conclusion, you're talking about Straight Pipe from Custom Turbo Full Custom Headers to Exhaust tips and need ECU reflash in order to gain more HP, replace OEM mufflers with Pipes do not gain any HP in the end, 1-3 Peak HP in 300hp+ you'll feel nothing, it's like you pee in the sea so don't be a smartass the fact that nobody does over 5000RPM in traffic.

Solara350

LOL Bro, sorry to denounce the Lexus, but my X1 M35i N55 SUV will smoke your IS350 or RC350, unless you turbo or supercharge it, Lexus is not a race car. Me and my Son tested on the track, BMW inline6 M smoked the RC or IS 350 stock vs stock. Don't ask me for video or dyno sheet, you don't believe, go find out and prove me wrong.

Pittsy

Dude, there are dyno sheet out there proving what you're saying is incorrect, go see RR-Racing's website. You're out here claiming that YOU have done the testing and have come to the conclusion that doing a muffler delete loses you power. Im calling BS that you did any testing of any sort. Im asking you to prove me otherwise. All I'm asking for is the data form your "testing" that you've completed. I have data from before I went FBO, data from after, and data from after supercharging. I recorded all of it, as do most people who modify their cars. Certainly if you brought the car to the dyno to test your muffler delete, you would have pics of the sheets no? No one here is saying that deleting your mufflers is going to gain you 50 HP.

My problem isn't with your numbers, its with your BS. Post up your data, or just admit you're full of it and stop spreading misinformation.

arentz07

@Solara350 Please exit the thread. No one asked about your other cars, and frankly, mentioning their supposedly superior speed adds nothing of value to this thread.

jgscott

iTrader: (1)

Why you would compare the 350 instead of Lexus F cars is beyond me?

You are also likely right that the N55 will Literally smoke.

https://oceansidemotorsports.com/blo...-engine-issues

What is the problem with the BMW N55 engine?

BMW N55 Engine Issues

• N55 Bearing Failure. Many BMW drivers with N55 engines have reported engine breakdowns and problems with the engine's bearings. ...
• VANOS Solenoid Failure. ...
• Valvetronic Oil Squirter Failure. ...
• Checking your engine oil. ...
• Replacing faulty spark plugs and ignition coils. ...
• Walnut Blasting or Intake Valve Cleaning.

• Valve Cover Oil Leak
• Water Pump Failure
• Leaking Oil Filter Housing Gasket
• High Pressure Fuel Pump Failure (HPFP) – Mostly older models

jgscott

iTrader: (1)

Told ya, lack of data, and knowable understanding including real live results denial. Seems he's a BMW Fan Boy.