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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 08-01-2008, 09:48 PM   #1
Len013091
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Shark Question

I've been looking at getting a shark to go with my 3.46 differential, but I have a question about the revlimiter. Does the JC shark give you a two step limiter (I think that's what they are, one that bounces on and off the redline), or does it just keep the stock revlimiter but just at 7000 rpm?
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Old 08-01-2008, 11:53 PM   #2
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I have the shark on my car and I am pretty sure it removes everything. I havnt tested it by trying to go past 7000 rpm, I have heard that is kind of the breaking point for these engines. My car is a 2002 325i and I feel power all the way to 6500 rpms but after that its pretty weak so I dont even really go above 6500. Its just unneeded abuse on the engine, although it is most definately different in your ZHP with the 50 hp you have over me
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Old 08-02-2008, 12:08 AM   #3
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Go out at redline the sh*t out of your car, then get back in here with my answer. But, yeah< I just want the higher redline for two reasons. One is so I can hit 60 in second just to see what times I get. The other is so I can shift at 6800 and not worry about hitting the rev limiter.
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Old 08-04-2008, 08:12 PM   #4
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Anyone else got anything to add? I'd like to know as I'm planning to buy one this week.
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Old 08-04-2008, 09:07 PM   #5
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If no one here can answer, you can always talk to the guys at TMS.
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Old 08-04-2008, 09:31 PM   #6
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http://www.turnermotorsport.com/pages/shark_inj_FAQ.pdf

Quote:
How do I know if my car has been Sharked?
The only way the end-user will be able to tell, other than the increase in power, is by
probing the new rev limit. On most BMWs this is raised to 7000 rpm. On cars equipped with
automatic transmissions it will difficult or impossible to reach this point without performance
software for the transmission. Keep in mind if the Injector runs into any trouble during its
installation it will give you an error code and you will know why the installation could not be
completed.

BUT, for example on the 323, the peak HP is reached at 6500RPM, so no need to exceed that:

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Old 08-04-2008, 11:12 PM   #7
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Quote:
Originally Posted by Racing.Ray View Post
http://www.turnermotorsport.com/pages/shark_inj_FAQ.pdf




BUT, for example on the 323, the peak HP is reached at 6500RPM, so no need to exceed that:

there is 2 reasons reason you would want to exceed that:

A- becasue of your ratio's it would allow you shift further into the torque curve in the next gear

B- if you have a low diff (high numerical) it would allow you to get more speed in each gear

other wise i think it still has a soft limiter after you get the shark (aka stock type)
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Old 08-04-2008, 11:17 PM   #8
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Quote:
Originally Posted by jamesthebikeguy View Post
there is 2 reasons reason you would want to exceed that:

A- becasue of your ratio's it would allow you shift further into the torque curve in the next gear

B- if you have a low diff (high numerical) it would allow you to get more speed in each gear

other wise i think it still has a soft limiter after you get the shark (aka stock type)
I am aware of the benefits of excess RPM's, I would just prefer to have more power and a longer engine longevity instead of slightly higher top speeds

And as I mentioned, the rev limit was increased to 7000, it wasn't removed completely.
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Old 08-05-2008, 12:19 AM   #9
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Quote:
Originally Posted by Racing.Ray View Post
I am aware of the benefits of excess RPM's, I would just prefer to have more power and a longer engine longevity instead of slightly higher top speeds

And as I mentioned, the rev limit was increased to 7000, it wasn't removed completely.
yeah longevity isnt effected much more than a 6500 shift. the valvetrain wont have float until well into the 8k's, so it aint much of a concern.
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Old 08-14-2008, 12:44 AM   #10
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HAHA, do you have any clue what is 2 step? good luck getting a system that you will ACTUALLY be able to give your bmw 2-step. PLUS unless you have a turbo there is no point in 2-step, PLUS with no launch control and you don't know what your doing, you can dislocate drive shafts, break tranny, or tear apart your rear diffs, MY suggestion is get the shark tuner and just be happy, or wait for the shark edit, cams intake and exhaust, maybe some carbon fiber and call it a day
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Old 08-15-2008, 10:31 PM   #11
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Quote:
Originally Posted by MikeyV89 View Post
HAHA, do you have any clue what is 2 step? good luck getting a system that you will ACTUALLY be able to give your bmw 2-step. PLUS unless you have a turbo there is no point in 2-step, PLUS with no launch control and you don't know what your doing, you can dislocate drive shafts, break tranny, or tear apart your rear diffs, MY suggestion is get the shark tuner and just be happy, or wait for the shark edit, cams intake and exhaust, maybe some carbon fiber and call it a day
I suppose the term would be a "hard" limiter. One that causes the engine to "bounce" off the redline. Not the one the car has that just holds the engine at a steady 6800rpm. No where in this post have I said I wanted to get a 2-step limiter. There also was no mention of launch control. All I asked was if the shark gave me a "bounce" type of rev limiter. Most 2 step limiters I've heard/seen around here bounce off the redline.
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Old 08-29-2008, 09:35 PM   #12
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Anyone know who I need to call to get some help with my shark injector? I can't get it to raise the redline. The program completes and throws no codes, but the redline is still 6800.
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