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zsserbia · 02-05-11, 03:21 PM

Glad you agree on my point and not glad about your hgf's. It seems that tuning a derv to it's optimum performance sometimes takes few bitter steps before you actually get there...

I wouldn't start a new thread on my derv but here's a couple of lines if you care to read as you may find out sometimes ignorance is blessed:

I purchased my zed based on thorough mechanical check, diagnostics test and a fair test drive down some curvy roads. Didn't know anything about it's history as original service book doesn't say anything past 30k miles (it was around 65 on the clock, but seemed original mileage)

Immediately it went for a full service including all belts because I didn't know if they' we been done already. Also put a new top ic hose. Specialist said the belts were changed some miles ago but cambelt was one tooth advanced and pump was advanced a couple as well. He suggested new ones should be fitted to factory setting as the engine seems to be in a great shape. So it was done.

Immediately I noticed a positive change in throttle response 3-4k rpm but negative change 1-2k which was annoying to me. Also the rev limit was 4200. Thought it may had a remap and now it's messed up with timing belts returned to oe specs.

Anyway thought I could give it a go with maf sensor cleaning and tightening the tps cable which had some free play.

When I removed the maf I noticed there was a lot of oil and dirt residue, obviously done by an to oily aftermarket air filter. I gave it a thorough clean and adjusted the tps cable.

I went for a ride slowly at first through a couple of traffic lights until i noticed the thing started idling so smooth it was almost unrealistic. After 20 miles or so i thought I'd push the throttle a bit. Found out it would take just a tiny touch at the pedal to get it going comparing to what it was before. Thought ok, it was just the tps cable so maybe I really try it out right now. Boy was I surprised! It pulled so smoothly through the entire rev band and sounded so beautiful and it was now reaching 5300k, maybe not usual for an oe spec. Also a showe in the back felt like a lot more than standard and not usual for a standard one. It was even accelerating better than some bmw 320d which really left the guy in shock but dunno if something was wrong with his car...

So, right now I drive it normally with just slight touch of the pedal and rarely revving it over 3k because I usually don't need to in everyday driving... How much horses are under the bonnet? I really don't care. Was it remapped? Couldn't care less... What do bmw derv owners think of it? I care even less than that. I know I love it and It makes me happy and I really think this is what matters in the end... Don't you think?

02-05-11, 03:21 PM	#24
zsserbia Member Join Date: Apr 2011 Location: Belgrade, Serbia Posts: 880	Glad you agree on my point and not glad about your hgf's. It seems that tuning a derv to it's optimum performance sometimes takes few bitter steps before you actually get there... I wouldn't start a new thread on my derv but here's a couple of lines if you care to read as you may find out sometimes ignorance is blessed: I purchased my zed based on thorough mechanical check, diagnostics test and a fair test drive down some curvy roads. Didn't know anything about it's history as original service book doesn't say anything past 30k miles (it was around 65 on the clock, but seemed original mileage) Immediately it went for a full service including all belts because I didn't know if they' we been done already. Also put a new top ic hose. Specialist said the belts were changed some miles ago but cambelt was one tooth advanced and pump was advanced a couple as well. He suggested new ones should be fitted to factory setting as the engine seems to be in a great shape. So it was done. Immediately I noticed a positive change in throttle response 3-4k rpm but negative change 1-2k which was annoying to me. Also the rev limit was 4200. Thought it may had a remap and now it's messed up with timing belts returned to oe specs. Anyway thought I could give it a go with maf sensor cleaning and tightening the tps cable which had some free play. When I removed the maf I noticed there was a lot of oil and dirt residue, obviously done by an to oily aftermarket air filter. I gave it a thorough clean and adjusted the tps cable. I went for a ride slowly at first through a couple of traffic lights until i noticed the thing started idling so smooth it was almost unrealistic. After 20 miles or so i thought I'd push the throttle a bit. Found out it would take just a tiny touch at the pedal to get it going comparing to what it was before. Thought ok, it was just the tps cable so maybe I really try it out right now. Boy was I surprised! It pulled so smoothly through the entire rev band and sounded so beautiful and it was now reaching 5300k, maybe not usual for an oe spec. Also a showe in the back felt like a lot more than standard and not usual for a standard one. It was even accelerating better than some bmw 320d which really left the guy in shock but dunno if something was wrong with his car... So, right now I drive it normally with just slight touch of the pedal and rarely revving it over 3k because I usually don't need to in everyday driving... How much horses are under the bonnet? I really don't care. Was it remapped? Couldn't care less... What do bmw derv owners think of it? I care even less than that. I know I love it and It makes me happy and I really think this is what matters in the end... Don't you think?