Write Up BMW Z4 3.0Si's head to head @ Surrey Rolling Road

[oldcarman]

Great figures considering both cars aren't new. They're both well within the HP drop expected on engines as old as they are. And both seem right on mixture wise, etc now you both have the baseline you need to compare the mods I think are coming. Also, you drew quite a gallery, nice one guys! JIM

 

[MAURICE THE MARTIAN]

Good results them.
Nice to see the Zeds are still showing good power and in good fettle after all the years.

 

[Grumps]

Be interested to see what sort of a figure the likes of mine will still produce. I imagine by now there would be a significant drop.

 

[pgunter]

@Grumpy Ebbee gave 173.5bhp last year. Stock she supposed to be 170... so don't knock them till you get them on the Dyno.

 

[GazHyde]

Be interested to see what sort of a figure the likes of mine will still produce. I imagine by now there would be a significant drop.

The problem is that you don't truly know what it had to start with, to know what it's lost. But if you can pull figures roughly around where BMW stated them in the brochures your not doing to bad. Think BMW said about 193 for the 2.8, so anywhere around 190 would be pretty respectable methinks.

I'm going to sort a Top Gear style power board thread at some stage, and hopefully more peeps will jump in and get theirs dyno'd. I still think the numbers were made up by the marketing department, so be interesting to be able to prove/disprove the claims.

 

[Grumps]

I don't know if I'd dare put Reggie on the rolling road. He is 18 years old and I don't know if he'd take that sort of abuse lol!

 

[Grumps]

Yeah

The problem is that you don't truly know what it had to start with, to know what it's lost. But if you can pull figures roughly around where BMW stated them in the brochures your not doing to bad. Think BMW said about 193 for the 2.8, so anywhere around 190 would be pretty respectable methinks.

I'm going to sort a Top Gear style power board thread at some stage, and hopefully more peeps will jump in and get theirs dyno'd. I still think the numbers were made up by the marketing department, so be interesting to be able to prove/disprove the claims.

Your right Gaz. The 2.8 books at 193. I'm. Sure we have a dyno at Ripley. Only 20 minutes away from here.

 

[GazHyde]

It's not as aggressive as you think, it's three relatively short blasts up to the red line. Takes him about 3 minutes to do the complete test we had done. Not trying to convince you, just saying it's no harder than I drive on the road sometimes

 

[billz]

Yeah

Your right Gaz. The 2.8 books at 193. I'm. Sure we have a dyno at Ripley. Only 20 minutes away from here.

You will have to make enquiries and see if we can get a group booking and discount

 

[Grumps]

It's not as aggressive as you think, it's three relatively short blasts up to the red line. Takes him about 3 minutes to do the complete test we had done. Not trying to convince you, just saying it's no harder than I drive on the road sometimes

It is when I'm driving!

 

[Grumps]

You will have to make enquiries and see if we can get a group booking and discount

Maybe a plan for the spring @billz?

 

[Nodzed]

The problem is that you don't truly know what it had to start with, to know what it's lost. But if you can pull figures roughly around where BMW stated them in the brochures your not doing to bad. Think BMW said about 193 for the 2.8, so anywhere around 190 would be pretty respectable methinks.

I'm going to sort a Top Gear style power board thread at some stage, and hopefully more peeps will jump in and get theirs dyno'd. I still think the numbers were made up by the marketing department, so be interesting to be able to prove/disprove the claims.

Not a chance I'd be terrified he'd tell me I'd got an empty stable and all my horses had escaped

 

[EnthuZiaZT]

So Gaz now you've established that you Zed is down on power compared to Lee's, what plans have you got to correct the situation. Supercharging?

Mike

 

[GazHyde]

So Gaz now you've established that you Zed is down on power compared to Lee's, what plans have you got to correct the situation. Supercharging?

Not got the funds for that at the moment, and as mine is a daily driver it's not really practical. Will just be induction, exhaust and remap.

 

[Sean d]

Maybe a plan for the spring @billz?

I'd be up for a group Dyno mate, I red line mine all the time on the cruises keeping up with the 2.8s, I also red line it when out and about

 

[oldcarman]

I go by the theory that HP on a dyno is one thing but the real test is on a drag strip, so I hope you line up with @Lee at Santapod next year!! JIM

 

[Mint]

,,,I'd be up for a group Dyno mate...

Count me in as well, I'd love to know how many horses I've still got. She's done over 163,000 miles now.

 

[Sean d]

Count me in as well, I'd love to know how many horses I've still got. She's done over 163,000 miles now.

Thats it @Grumpy, you need to get a group price

 

[Twin Turbo]

I be up for a rolling road trip with my little 2 ltr

@GazHyde when did you last do a oil change - as that can make a big difference - I know @Lee does his every 8K.

 

[Grumps]

Thats it @Grumpy, you need to get a group price

Will get us heads together in the spring and have a look at it. I'll see if the one a Ripley is still there.