ZHP Fun with Gas

[Andre]

I have recently discovered that my ZHP likes octane.

I have pretty much always used Sunoco 94 octane. I have recently tried adding octane booster though, and it does make a difference. 2 bottles of STP octane boost does the following:

Smooths out the entire acceleration/deceleration range
Eliminates the 4100RPM 'gap' in power
Possibly gives more power (might be imagined).

I am now addicted to this, and really notice when I have not added it.

I suggest you give it a try.

Andre

 

[Nataku]

there's a fix for this

http://forum.e46fanatics.com/showthread.php?t=266157&highlight=zhp+4000

ZHP Owners - 4K RPM dip, Service Measure info
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Service Measure
Engine Electrical B12 209 05 04/06/2005
Subject
M54B30 MS45.1; Engine Power Drops at 4000 RPM

Vehicle
E46, E60 with M54B30 and manual transmission.

Complaint
Customer may complain of an engine power drop at approximately 4000 rpm during aggressive acceleration.

Cause
Ignition timing retardation due to unfavorable tolerances of DISA valve flap shaft. Vibrations of a DISA valve are interpreted by the knock sensor system as detonation combustion.

Measure
On a customer complaint basis, replace DISA valve with the improved part (PN 11 61 7 544 805).
After DISA replacement, connect vehicle to DIS/GT1 and from DME identification page retrieve the programmed and basic DME part numbers.
Reprogram DME with the latest available DTS CD! SSS CIP software version. DME programming should last for at least 20 minutes and should result in both programmed and basic control unit number changes. Reprogramming of DME clears the long-term knock sensors adaptations. If the knock adaptation values are not cleared, the vehicle will still exhibit the power lack complaint, even with the improved DISA valve installed.

Important:
In the event the DME programming takes only a short period of time (approximately 5 minutes), and the basic control unit part number has not been changed, the adaptation clearing process has not been accomplished.

In such a case, contact Technical Hotline — Drive train via a PuMA case, requesting authorization for DME shipment to Engineering Department for reprogramming. For the PuMA case title use the following: MS45.1 DME KNOCK ADAPTATION RESET”.

 

[Andre]

Thank you for this! I printed it out and took it to the dealer. They ordered the part and installed it, and reprogrammed the DME.

I have yet to see if it worked, as I am currently waiting out another break-in period after having my piston rings replaced. (See my other thread about oil consumption).

Thanks again!

 

[snowsedan04]

With premium gas at $2.65 I think I'll pass on the additives and live without the extra 1/1000th of a second.

 

[dball711]

$2.65 is a lot better than $3.09 at the Shell station I just saw.

 

[deutsch100]

Just filled up this morning. $3.15 a gallon @ Chevron.

Honestly...I think gas should be $5.00 a gallon. It might make people think before buying enormous SUVs, and making us more reliant on oil. Also if gas was more expensive, it might make people get off their fat asses and walk, or ride a bike..take the train, subway, bus. Look at Every!! country in Europe and at Canada...they have been paying above $3.00 a gallon (Ja, ja ich wiess sie benutzen Liter There is no reason why we should be able to cheaply burn oil....if it was more expensive people would think about's it's preciousness and that it is very, very finite!!

Don't shoot me. Just my 2 cents [8)]

 

[tazza0712]

I won't shoot you... but fuel consumption for some BMWs is comparable to many SUV's on the market, or shall I say SAV's in the case of BMW - My 0.02 as well! =P

 

[snowsedan04]

$3.15 a gallon? That is huge. I don't even pay that much at my marina and they always rip off their captive audience. Finally, something that costs less in NJ!

 

[Average Jae]

Adam, your argument only makes sense if all of America has mass trans, and easy access to other means of transportation. Canada i could understand, but you can't compare us to Europe, in smaller countries, it doesn't take as long to get from one place to another, so even if the gas prices are higher, you won't have to go as far. in michigan, where it takes me like 10-20mins at least to get anywhere, $5 a gallon would kill me.

also if we were paying $5 a gallon, imagine how much everyday products will cost due to shipping charges. freight is a bitch, even at under $3, our trucking co is charing a 10% fuel surcharge. i won't shoot ya, but there are other implications besides idiots on trucks to worry about.

 

[PhatBimmer]

US isn't exactly the prime example of providing some sort of bus mas transportion or train service that is avaiable to the peoples. Like in Chicago you have mass transport but when I get out to the suburbs there is little or no such thing other than taxis and thats expensive! So yes in the US we do need cars but I heard also that gas should go to $3 dollars and level there for a bit (3.15-3.75 is what I heard) but I also heard it will go up to $5.00 soon so watch out guys, might wanna start loooking for your next 4 banger ROFL j/k

Speaking of which my budy is trying to sell his Yukon and the dealerships don't go above 12k for it because not many people are buying SUV's due to gas stuff. Figures.