sixspeed famous on Pistonheads
- Thread starter AlexRWD
- Start date
Hadn't seen that! 
Yeah, I spoke to Garlick and he wants to do a small feature on the car. He actually contacted me a week or two before the day, as he'd seen the car parked up in town one night and had put a post on PH asking if anyone knew who the owner was...
No idea what he has planned, but will keep you guys updated. He did mention it would be about 6-8 weeks from now, and would also include other Z4Ms, not just mine.
Yeah, I spoke to Garlick and he wants to do a small feature on the car. He actually contacted me a week or two before the day, as he'd seen the car parked up in town one night and had put a post on PH asking if anyone knew who the owner was...
No idea what he has planned, but will keep you guys updated. He did mention it would be about 6-8 weeks from now, and would also include other Z4Ms, not just mine.
337.2bhp and 281lb/ft @ approx 4900rpm (reading back from the graph).
Obviously that's just about stock (338bhp/343ps), however the other E46 M3s there were running in the low 320s, and I think Top Pup's stock Z4MC got 333bhp (332.9?), although I don't know what torque reading he got.
What we did notice when we compared graphs, was that my torque curve seemed a lot flatter, and higher in the low-mid range than his, so the exhaust and filter seem to have made a mild improvement, which is nice (and all I was expecting tbh).
I'll scan the graph in and post it up.
Obviously that's just about stock (338bhp/343ps), however the other E46 M3s there were running in the low 320s, and I think Top Pup's stock Z4MC got 333bhp (332.9?), although I don't know what torque reading he got.
What we did notice when we compared graphs, was that my torque curve seemed a lot flatter, and higher in the low-mid range than his, so the exhaust and filter seem to have made a mild improvement, which is nice (and all I was expecting tbh).
I'll scan the graph in and post it up.
I shouldn't keep replying (talking) to myself, but looking at the graph reminded me of another observation - which was the slight flat-spot/dip on my power curve between 6000-6250RPM...
Can't say I've noticed it when driving, but it was very apparent on the dyno. Could be a down-side of the filter, perhaps? Hard to say without replacing parts back to stock and doing the runs again to compare, which would be nice to do sometime.
Can't say I've noticed it when driving, but it was very apparent on the dyno. Could be a down-side of the filter, perhaps? Hard to say without replacing parts back to stock and doing the runs again to compare, which would be nice to do sometime.
Here ya go, sixspeed! :winner:
Thanks for posting the charts guys - pretty good figs for both cars 
Looks like v little difference in peak torque figs, but sixspeeds looks a bit flatter overall.
Maybe we should do a group Z4M trip to a Rolling Road - Surrey or Austec in Gatwick? - and with a mix of cars, from completely stock, to ones with just one non-stock item each, ie filter, exhaust, then could get a reasonable idea of what difference the mods make?
Looks like v little difference in peak torque figs, but sixspeeds looks a bit flatter overall.
Maybe we should do a group Z4M trip to a Rolling Road - Surrey or Austec in Gatwick? - and with a mix of cars, from completely stock, to ones with just one non-stock item each, ie filter, exhaust, then could get a reasonable idea of what difference the mods make?
Top pup said:Mine made 332.8 and about 278lb/ft @ 4900rpm, but could probably do with a few more miles on it before it's fully loosened up.
Here's mine for comparison
(Please note the scales are slightly different)
James
That is almost identical to what mine made at Thorney's it was 332 something, mileage was about 8000 I think. What has yours done now?
Andy
Good figures you got there mate.
AlexRWD said:Thanks for posting the charts guys - pretty good figs for both cars
Looks like v little difference in peak torque figs, but sixspeeds looks a bit flatter overall.
Maybe we should do a group Z4M trip to a Rolling Road - Surrey or Austec in Gatwick? - and with a mix of cars, from completely stock, to ones with just one non-stock item each, ie filter, exhaust, then could get a reasonable idea of what difference the mods make?
I like the sound of that!
We could leave it a couple of months til winter perhaps..
a) because there's never much to do and it'll be a good excuse to get the car out over the colder months...
b) the colder temperatures might will help the cars run a bit better, especially when static on a dyno...
So what happened to the comparison? Did it ever happen? I'm interested because I had my car at SRR today and it produced 349 hp without any mods which surprised me, especially as the only reason I took it was due to a lack of faith in the torque I felt it was producing - again a major surprise.
Not immediately as I don't have a scanner but Charlie's promised to e-mail me a copy when he backs up the PC on the rolling road.