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03-09-2008, 12:01 AM | #1 |
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what would be a decent horsepower # for the 135i
i have a 2001 trans am with 430hp and 415lbs of torque, and when i get the 135i i would like to have a decent amount of horsepower,and i was wondering what would be a reasonable amount hp# to the wheels for the 135i. I was thinking about 380 or 390 hp and maybe 390lbs of torque, is that reasonable number or am i just dreaming please correct me if im wrong
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03-09-2008, 12:35 AM | #2 |
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Nope, that is about what peole are getting with a tune, catless downpipes, intake, and FMIC. Generally closer to 410-420 ft lbs to the wheels though. The stock turbos are just tiny, and start to run out of steam at high RPMs. With alky/water, or racegas you could see a bit over 400 rwhp. Realistically, getting much past 400whp on street gas will take bigger turbos.
You can get 380-390rwhp/415rwtq with basic boltons, though. PS: To give you some perspective, here's a 335i with a tune and a catback racing an LS2 GTO:
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03-09-2008, 09:13 AM | #3 | |
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wow those not numbers are not bad for basic boltons, with those numbers and the weight of the car, wow thats going to be a fast car. :thumbup: |
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03-09-2008, 10:28 AM | #4 |
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yea, very quick car.
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03-09-2008, 11:04 AM | #5 |
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the 135i is also a couple hundred pounds lighter and much better build than the trans am. I had a 2001 Camaro SS fun car but just wasn't the whole package you get from a BMW.
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03-09-2008, 03:11 PM | #7 | |
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Bolt-ons are not necessary for what you want. Dinan offers a "flash" of the ECU from BMW dealers that ups the N54 to 384hp/421ft-lbs at the crank. Easy to do and no hassles, though it is pricey at $1999. I would certainly go this route before I start messing with downpipes or water/meth for top end hp, etc. But I guess it all comes down to what you want, If you goal is to make a drag racer, then yes a down pipes, alky/meth/water and octane are considerations. |
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03-09-2008, 04:34 PM | #9 |
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no, only a few do... And only those few will do Dinan warranty work... Any Dinan part voids the BMW warranty but Dinan replaces it with an identical Dinan warranty...
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03-09-2008, 06:40 PM | #12 |
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03-09-2008, 07:14 PM | #13 |
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YES... you void your BMW warranty, but Dinan replaces it with their warranty which is identical to the BMW warranty... You only lose your BMW warranty to any part that the flash could cause a problem with, so for example if your suspension goes wrong then the BMW warranty is in tact... But if your turbos or engine dies from the extra boost then you have NO BMW warranty but the Dinan warranty will take over and cover the cost...
Essentially you have the same warranty, its just a matter of figuring out who is covering which part... Just and FYI But there have been some instances when BMW and Dinan says their not responsible and each points the finger at the other, is not common but it has happned...
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03-09-2008, 07:32 PM | #14 |
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384 at the crank is only 326 at the wheels (considering cars loose 15% to drivetrain). you're gonna need bolt ons if you wanna make 400hp at the wheels. but on the bright side, the engine dynos 275hp stock so its making 323 at the crank stock.
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03-09-2008, 07:48 PM | #15 | |
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With things like tunes, where BMW could easily argue that you added additional stress to the motor and drivetrain, they can have carte blanche on what they choose to cover. Dinan will argue most of those thing too. I'm not inferring to not mod your car, just that you have to go into it as an informed consumer. Magnusen-Moss Act was meant to keep dealerships from voiding your warranty for unrelated items, not for things that may very well be the cause of turbo/tranny/differential issues in the future. |
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03-09-2008, 11:58 PM | #18 | |
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They also provide us with the % of loss in their documentation after they did runs with the engine back in. It's all there and I am completely in awe how people looking at all the option for their car haven't at least looked into this wealth of information from a very respectable source. BTW, Dinan claims 342hp at the wheels @ 5600rpms. It's all there, just waiting for people to read. Any source is worth reading, even if you hate the Dinan price. |
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03-10-2008, 02:29 PM | #19 | |
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03-10-2008, 03:15 PM | #20 |
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of course if you want 400+ RWHP get a PROcede, cat less downpipes, air intake, any decent cat back exhust, bigger higher flow intercooler and run 100 octane and you'll be there
PROcede $1600 down pipes $700-$1000 air intake $? cat back $1000 for the 335i i imagine a bit less for the 135i intercooler $900-1500 |
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03-10-2008, 03:22 PM | #21 | |
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Seems about right . .In my dealings with the 03/04 cobras and rwhp .. seems the manuals are about 11 - 12 % loss .. thanks, Crowley
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