Frequently Asked Questions (FAQ) About the BMW E46 330 ZHP Performance Package Option

[danewilson77]

Is there a reliable online listing of all the items which were changed to make a ZHP a ZHP?

The FAQ is a good resource.

Edit: oops....haha

Sent from an S6 Edge

[Dual]

What I meant was a single list, presumably by category, of what had been improved/changed specifically for our cars. Something I could send to a friend who inquired. or whatever.

[BMWCurves]

What I meant was a single list, presumably by category, of what had been improved/changed specifically for our cars. Something I could send to a friend who inquired. or whatever.

Taken from the BimmerFest E46 Wiki with some mild editing (link: http://www.bimmerfest.com/wiki/index...ance_Package):

Per the BMW press release, this package included the following changes. However, many of these claims have been found to be misleading:

• Engine mods that equal a gain of 10HP & 8 ft/lb of torque by reprogramming the Digital Motor Electronics to allow a 6800 RPM max (up from 6500).
• 6 speed short throw shifter (for manual transmission equipped cars)
• 3.07:1 Final drive ratio w/ manual trans instead of the standard 2.93:1. Convertibles retained the already installed 3.07 ratio.
• Max Speed Limiter set to 155 mph (instead of 128)
• New M suspension, more "sporty" than standard or poor road package.
• There are no "ZHP" specific springs. The same springs are used for comparably equipped 330's for both the ZSP and the ZHP. In both cases, the spring rate for the post 4/01 build ZSP and ZHP is believed to be slightly less than that of the pre-4/01 ZSP
• Firmer shocks (Jounce: front +50%, rear +20%), (Rebound: front +35%, rear -8%)
• ZHP does use different dampers than the ZSP. There is a shortage of shock dyno data, but based on the SACHS damping parameter values it is believe the jounce damping is the same but rebound damping is stiffer on the ZHP. Pre-4/01 sport package cars had similar damping values to the ZHP but used the higher grade SACHS "Advantage" dampers rather than the "Super Touring" model.
• Smaller diameter anti-roll bars: 23.5 mm front (v. 24mm pre-04/01 ZSP), 18mm rear (v. 19mm pre-04/01 ZSP)
• There is no 18.5 mm rear sway bar offered by BMW for the E46.
• More rigid forward bushings
• Front Control arm bushings are the same ZHP/ZSP
• ZHP control arms are different and use a stiffer ball joint
• Lower ride height by 15 mm (.6 inches) utilizing shorter auxiliary springs (Since both the ZSP and ZHP use the same springs, they have the same ride height. Both are 15mm lower than a non-sport E46 -.5 degrees of camber (for a total of -1.1 degrees) Alignment settings are the same ZSP and ZHP)
• Exterior trim elements (front & rear fascia, trunk lid spoiler)
• Special exterior trim: Anthracite (charcoal) headlight surrounds, High-Gloss
• Shadowline (black gloss) trim
• Large diameter stainless steel dual exhaust outlets
• Extra thick Alcantara steering wheel (later switched to perforated leather)
• ZSP Sport Seats
• Alcantara & cloth upholstery to replace leatherette and standard trim (leather still optional)
• Choice of "Black Cube" or "Silver Cube" interior trim
• Red needles on the instrument cluster
• Style 135's are added, 18x8.0" front, 18x8.5" rear
• Wider Tires: 225/40ZR-18 in front and 255/35ZR-18 in the rear.
• Reduced steering rack ratio. 13.7:1 versus 15.5:1 (All post 4/01 330's use the same ratio steering rack. The ratio of this rack is 13.7:1, it is believed to be different from that used on the 325's)

[Dual]

Thanks for this!

[danewilson77]

Nice assist Curves.

Sent from an S6 Edge

[az3579]

We should probably clarify the last item about the steering racks to state that the ratio is the same as 330, but the ZHP rack is different in that is has a weightier feel. Same part number but is actually slightly different physically.

Sent from my LG V10 on Tapatalk

[BMWCurves]

Nice assist Curves.

Sent from an S6 Edge

[Dual]

That hybrid list doesn't mention the cam changes. The cams have a different profile, right?

[BMWCurves]

Not sure why it's not listed in BimmerFest's wiki, but it is mentioned in our FAQ. There are different part numbers:

Standard intake camshaft: 11317500388
Performance Package intake camshaft: 11317919241
Standard exhaust camshaft: 11311435416
Performance Package exhaust camshaft: 11317833596

[johnrando]

You should update them then.