Am I sharked?

[VaTechZHP]

I'll be up in Blacksburg for the Clemson game. I'm 99.9% sure my car is completely stock if you want to take it for a spin opr do some pulls out 460 at some point during the weekend?

[HokieZHP]

VaTechZHP that'd be awesome if we could work it out! I'll send you a PM and we can chat.

Thanks

[MasterC17]

Not sure if these have been covered yet but two things.

1. The "rev limiter" does not instantaneously kick in to stop you exactly at 6700rpm, so you could theoretically rev past it a bit (such as 6800 or so). It appears you hit about 6900 in the video but I never heard the rev limiter kick in. So, I wouldn't say that you are DEFINITELY sharked although it does appear the rev limiter was raised. Also note the car could have received a rev limit raise and nothing else.

2. Someone commented that you are running hot. As long as the needle is somewhere close to the middle this means absolutely nothing. The coolant gauge is a dummy gauge and will read in the upright position from about 70c-110c (or something like that). So, don't be concerned with the needle position unless it differs obviously outside of the mid-point.

[MasterC17]

I'll make a video of how the secret OBD digitally reads out my RPMs today. Redline is fine. There is a reason why BMW put a max on our streetable 3.0L engine for reliability. I've ran my car at 6800RPM through a long sweeping corner with the throttle pinned for just under 10 seconds. I made the mistake of forgetting to upshift and upshifting in the corner could prove nasty so I kept speed at redline. The engine screamed like a 200lbs overweight person being made to run that extra mile, but in the end it made them stronger. That was ages ago and my engine is still running like a strong champ! :P

Please note that running the car over 6,000 RPM's contiguously is not advised. Although the car has a redline of 6,800 (or 6,500 if not ZHP), the rev limiter should really be 6,000 across all models. Reason being the engine harmonics over 6,000 RPM cause the oil pump nut to back off due to a crappy factory damper if you abuse the red line. Not saying that it is definitely going to happen or it happens often but it most definitely CAN happen. Although the oil pump nut can be welded, the oil pump sprocket can eventually shear and cause harm to the engine. While on the subject, please don't ignore your low oil pressure light if it comes on (RED oil light) as, again, we do have problems with the M54 in this regard. For 99% of street cars this is of no concern, but something to note.

[az3579]

Please note that running the car over 6,000 RPM's contiguously is not advised. Although the car has a redline of 6,800 (or 6,500 if not ZHP), the rev limiter should really be 6,000 across all models. Reason being the engine harmonics over 6,000 RPM cause the oil pump nut to back off due to a crappy factory damper if you abuse the red line.

Thanks for that, I thought that was an E36 only issue!
Good to know.

[Hornung418]

Please note, that this is only with 330Ci/i. It hasn't been well documented with 323, 328 or 325's. But I love to take my 328 to redline...I've noticed no ill effects after doing so.

[MasterC17]

Please note, that this is only with 330Ci/i. It hasn't been well documented with 323, 328 or 325's. But I love to take my 328 to redline...I've noticed no ill effects after doing so.

Good point, I'm going to guess it is mostly due to the lower redline (6,000). Assuming the oil pump issue was/is fixed, running the car to redline would have no ill side effects on the 330's. Also, take note that pre-2004 330's are more susceptible as they are held on with just a nut and 2004+ used a Loctite nut.

[VA//M3]

Please note, that this is only with 330Ci/i. It hasn't been well documented with 323, 328 or 325's. But I love to take my 328 to redline...I've noticed no ill effects after doing so.

True, This only affects M54B30's more so the M54B25's and M52TU's simply because of the M54B30's increased stroke.

Stroke

M52TUB25 = 75 mm (2.95 in)
M52TUB28 = 84 mm (3.31 in)
M54B25 = 75.0 mm (2.95 in)
M54B30 = 89.6 mm (3.53 in)

That's mainly how the M54B30 makes 30 - 35 more HP and TQ and higher displacement over the M54B25. Despite the M54B30 having a slighter lower compression ratio. The piston bore is exactly the same across all those engines.

Good point, I'm going to guess it is mostly due to the lower redline (6,000). Assuming the oil pump issue was/is fixed, running the car to redline would have no ill side effects on the 330's. Also, take note that pre-2004 330's are more susceptible as they are held on with just a nut and 2004+ used a Loctite nut.

The main reason the OPN backs off is also due to cars that are auto-x's and tracked. Mainly when they spin out and forget to push the clutch in. Not pushing in the clutch and spinning out basically spins the engine backwards impacting the OPN nut loose.

M54B30's are simply not made to rev. They have a insanely long stroke. Think of it as a B25 with a stroker kit. Even if you built the head and tied down the OPN to sustain a 8k rpm limit the crankshaft will detonate itself. UNLESS you use a properly tuned ATI SUPER DAMPER HB. But it's more due to a improper oil pump gear design and improper harmonic balancer.

Even the 2jz 3.0l supra engine has a 86mm stroke on a 6 cyl inline 6 cyl with a cast iron block.

BMW might have pushed it too much with a 89.6mm stroke, aluminum block, without redisgning the OPN gear, and HB.

[MrMaico]

A little info on the ZHP specific oil pump nut....

http://www.e46fanatics.com/forum/sho...d.php?t=714263

[danewilson77]

A little info on the ZHP specific oil pump nut....

http://www.e46fanatics.com/forum/sho...d.php?t=714263

Glad I have ZHP. Thanks for research and sharing.

HTC Thunderbolt+TT