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Old 12th April 2010, 00:44   #1
Frankenspyne
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The $6000 Question

Question: If you only had $6,000 to spend on performance mods for your 2006 M5 with SMG what would you get done? Let's assume you don't care about exceeding 100 mph.fficeffice" />

For example, CPU chip, exhaust and air induction
or
headers and exhaust
or
throttle bodies and a rear

If you could be brand specific that would also be helpful.

Thanks, Scott
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Old 12th April 2010, 00:54   #2
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RPI Scoops. BMC Filters, Block Off Plates or ASR Full CAI System, ASR Gen III Exhaust or RPI GT Ehxuast, RPI Pulley, H&R Spings and Spacers, If you have enough left over, the ESS/RPI Tune with SMG Tune. Done!


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Old 12th April 2010, 01:01   #3
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For under 100mph I'd say the pulley would be a good thing. Less rotating mass would let the engine wind out quicker.

Next I would probably get RPI scoops + BMC filters. You won't see too much gain until 60-70mph, but for the price it's still well worth it.

Then a good Section 1,2,3 exhaust such as RPI or ASR.

Lastly go ahead and tune the car.

(considering you live in California, I'd say go for the full RPI setup of RPI exhaust, RPI pulley, RPI scoops, and RPI/ESS ECU and SMG tune).

You might run a little over $6000 with the full RPI setup, but I think it'll be well worth it. Right now they are offering a 25% discount if you purchase both tunes, so you might want to jump on that.
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Old 12th April 2010, 01:23   #4
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Rpi exhaust, Rpi pulley, Rpi scoops and bmc drop in filters, Kw variant 3 thats about 6 k i think
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Mods so far

Rpi gt exhaust
Rpi powerpulley
Rpi scoops
Rpi blockofplates
Bmc drop in filters
Kw variant 3
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Old 12th April 2010, 06:15   #5
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thanks Revo, that helps a lot! However, I am assuming that doing this voids my warranty. How do you contend with that?
Thanks, Scott
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Old 12th April 2010, 06:37   #6
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Thanks for your quick reply. which exhaust sounds more mild ASR or RPI? I don't want it to be too loud. Thanks again, Scott
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Old 12th April 2010, 07:20   #7
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In terms of shear volume, I believe that the ASR Gen II and Gen III Race are equal to the RPI in sheer volume.

The difference is that the ASR exhaust is more of a deeper "roar" while the RPI has a high pitched "howl."

The best bet is to find some M5's that have the exhaust and see how you like it. I'm sure RPI can get you in touch with a few people that have their exhaust so you can hear it in person (the only real way to figure out how an exhaust sounds).

Your other options are the ASR Gen III Sport (which has a slightly different design making it quieter) or using the RPI "silencers" on their exhaust (reduces noise at the cost of a bit of power).

The BMW dealer will have to prove that your mods caused whatever part to fail to deny you warranty claim. As such, if your transmission explodes they can't say it was caused by your exhaust or something.

The only thing they can really try to nail you for is the pulley, and that's still a small chance. If you are really in fear, you can get a Dinan pulley, and be covered under their warranty.

But again, due to your proximity to RPI, I would just grab one of their full setups.

Are you in SoCal or NorCal?
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Old 12th April 2010, 08:21   #8
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I'd get wheels, the extra 20HP you may gain isn't worth the price and you won't even feel the difference...
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Old 12th April 2010, 08:27   #9
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Quote:
Originally Posted by BMWPower06 View Post
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I'd get wheels, the extra 20HP you may gain isn't worth the price and you won't even feel the difference...
Are you saying forget all those mods or a specific one?

If you are trying to imply that RPI scoops with BMC drop-ins, pulleys, Sec 1,2,3 exhaust and a tune will net him only 20hp and he won't feel the difference, then you are seriously on something.

People have felt differences from scoops alone.
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Old 12th April 2010, 09:08   #10
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Id get the pulley, SMG & ECU tune, scoops and blockoff plates, remove the carbon filter, bmc filters and toyo t1r's to win a battle till 100mph for under 6k... and if there is enough left over get a full rpi exhaust... pulley=less rotating mass on the engine, bmc, carbon filter removal and scoops= best bang for your buck and can reap benefits at about 40mph... smg tune= faster shifts... ecu tune= about 10whp throughout the range... and better tires to launch better... the exhaust gives a good 13whp or so throughout the rpm range
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RIP=White 944 turbo: KKK K-27/6 turbo, upgraded intercooler, Lindsey Racing hardpipes, Autothority MAF, B&B exhaust with 4.5" oval tip, Siemens #55 fuel injectors, Lindsey Racing MaxHP custom Chip set, 3 bar fuel pressure regulator, Re-worked head and slightly overbored pistons, Spec Lightened 6 puck stage 3 clutch, Quaif torque biase differential, Apexi AVC Type-R Electronic boost controller, HKS type-1 turbo timer, Shimmed wastegate, Champion Motorsports adj. bypass valve, Weltmeister front and rear sway bars, Weltmeister strut tower brace, Koni adj. "yellows", unknown springs, Turbo Twist rims, Kumho Ecsta Supra tires... And a couple of more unknown mods...

Last edited by Myke951; 12th April 2010 at 09:14.
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