278 replies to this topic

[VIX]

ooh...that's not great below 4k is it?

Foxy,

It looks the same as yours and I'm only 5bhp down on your 158. What did you have done?

[Jase_MK]

Its gotta be cos the thing is hardly run in surely?

I mean theres an absolute mile of difference between a 9k VX and a 20k VX

True....but looking at the table:

175bhp @ 3987 miles (Milltek & remap)
170bhp @ 2785 miles (Milltek & remap)
167bhp @ 11000 miles (Milltek, Viper & remap)
170bhp @ 10000 miles (Milltek, Viper remap)

[Foxy]

It looks the same as yours

..and I'm not too happy either...

and I'm only 5bhp down on your 158.

7 down on 159.8

What did you have done?

Mine is S1 with piper back box, and viper. Car's done about 8000miles.

It's not the peak power that worries me - it's the curve below 4k rpm - yours is worse than mine*. There should be a steadily increasing gap between the b4 and after runs - At very least the remap should be smoother - that's part of the reason for having it (ie to remove flat spots).
Take a look at MartinS's (?) - that's how it should be...



*I don't mean this in a mine's better than yours kind of way

Attached Files

•  AMD2.jpg   32KB   1 downloads

Edited by Foxy, 21 September 2004 - 03:44 PM.

[jules_s]

goddammit, im looking for the tables but just keep getting redexed. any chance anybody could re-post the bugger

[VIX]

It's not the peak power that worries me - it's the curve below 4k rpm - yours is worse than mine*. There should be a steadily increasing gap between the b4 and after runs - At very least the remap should be smoother - that's part of the reason for having it (ie to remove flat spots).

Aaaah! And interestingly it's around the 3500/4000 rev range that I now feel that I should be changing up which I why I told AmD that I felt the car was less free revving! Of course you can drive through it but I no longer feel that I am revving straight up to the limit as I have previously.

[VIX]

goddammit, im looking for the tables but just keep getting redexed.

any chance anybody could re-post the bugger

It's back on page 9!

[Pipo]

You can add my figures too. NA was standard at that moment, only precat removed and sillicon tube + airhorn removed from intake airbox. Crankshaft-power: 107,5 Kw Wheel power: 88,5 Kw Max power at 5530 rpm Torque: 191 Nm at 5160 rpm Max rpm was 6420 rpm Air pressure 1012 mbar Temperature: 17 °C Time: 15h14 There was a dip of about -10 Nm in the torque curve between 3000 and 3300 rpm. My Speedster had +- 12.500km

Edited by Pipo, 21 September 2004 - 08:48 PM.

[Jim_Cross]

Foxy, what did AmD say about yours? I was considering getting a remap, but now I'm really not sure. I wasn't convinced that the power gains would be worthwhile, and it seems that the results are a bit hit and miss

[Jim_Cross]

It's not the peak power that worries me - it's the curve below 4k rpm - yours is worse than mine*. There should be a steadily increasing gap between the b4 and after runs - At very least the remap should be smoother - that's part of the reason for having it (ie to remove flat spots).

Aaaah! And interestingly it's around the 3500/4000 rev range that I now feel that I should be changing up which I why I told AmD that I felt the car was less free revving! Of course you can drive through it but I no longer feel that I am revving straight up to the limit as I have previously.

Now that IS strange!
I found that with the freer flowing exhaust and induction it encourages me to rev it more and it starts to rev much more freely from 3500rpm

[clipping_point]

You can add my figures too.  NA was standard at that moment, only precat removed and sillicon tube + airhorn removed from intake airbox.
Crankshaft-power:  107,5 Kw
Wheel power:  88,5 Kw
Max power at 5530 rpm
Torque:  191 Nm at 5160 rpm
Max rpm was 6420 rpm
Air pressure 1012 mbar
Temperature:  17 °C
Time:  15h14
There was a  dip of about -10 Nm in the torque curve between 3000 and 3300 rpm.
My Speedster had +- 12.500km

OK! Will do that! Thanx!

But it seems you have that standard effect 146/120 HP at flywheel and wheels

Edited by clipping_point, 21 September 2004 - 09:14 PM.

[Foxy]

Foxy, what did AmD say about yours?

Well...when I phoned up they said... "hang on a minute, I'll put you through to or VX specialist..." - guess who? Our very own JT! Anyway, Thorney said (iirc) that he'd done the map on my car (the print out said someone else ), and that they could make the curve look however I/they wanted, but the important thing was how the car drove...
I came off the phone unconvinced and have been wondering what to do about it. The thing is, I don't know for definate that something is wrong - I'm just not convinced it's as it should be. Especially after seeing MartinS's graphs...

[Jim_Cross]

hmmm. One thing to consider is that I think AmD said their road was over-reading a while ago, so that might explain the difference in power. However, the difference in the curves does seem very strange

[Foxy]

Jim,
I think I mentioned earlier that I'm not tooooo bothered about top end numbers. All dynos are/could be slightly different and the atmospheric conditions are impossible to replicate. I'm much more interested in the shape of the curve...

[Thorney]

Foxy, what did AmD say about yours?

Well...when I phoned up they said... "hang on a minute, I'll put you through to or VX specialist..." - guess who? Our very own JT! Anyway, Thorney said (iirc) that he'd done the map on my car (the print out said someone else ), and that they could make the curve look however I/they wanted, but the important thing was how the car drove...
I came off the phone unconvinced and have been wondering what to do about it. The thing is, I don't know for definate that something is wrong - I'm just not convinced it's as it should be. Especially after seeing MartinS's graphs...

No, I don't do any of the remapping (thats Gary's job) I just get involved in the overall map of the car by doing all the road testing. My point on what it feels like it paramount though, and as I said, if you're not happy then get it back and let them have a look at it. I can't remember if I drove yours or not (bit of a blur as there has been so many) but if it doesn't feel right then it normally isn't right. If you let me know I can make sure I can be there to have a drive as well, I'll be able to tell quite quickly.

[VIX]

John, You were going to drive mine on the Wednesday to try and identify the transmission noise (your email of 13/9). Were you able to? How did it feel? Steve

[Foxy]

My point on what it feels like it paramount though, and as I said, if you're not happy then get it back and let them have a look at it.

Thanks John. But 'popping' back to AmD is not that easy and prob means a day off work...you'll say it's fine, and I'll be even more pissed! Perhaps you'd have a look on Monday?

I was wondering what the point of the rr graphs was?

I can't remember if I drove yours or not (bit of a blur as there has been so many) but if it doesn't feel right then it normally isn't right.

C'mon - surely you'd remember driving the primer one.

[VIX]

Perhaps you'd have a look on Monday? 

Foxy,
Didn't realize you were doing Wales/Anglesey. Catch you there. I'm KN03 UBB.

Edited by VIX, 22 September 2004 - 05:53 AM.

[VIX]

I found that with the freer flowing exhaust and induction it encourages me to rev it more and it starts to rev much more freely from 3500rpm

Jim,
Can you post your bhp dynoplot?

[Foxy]

Didn't realize you were doing Wales/Anglesey. Catch you there. I'm KN03 UBB.

I think you know which one is me!

[Jim_Cross]

I found that with the freer flowing exhaust and induction it encourages me to rev it more and it starts to rev much more freely from 3500rpm

Jim,
Can you post your bhp dynoplot?

If I had a dyno plot, I would! My car's never been rr'd - my opinions about my car are all subjective.
You're welcome to check mine out at Bedford to see how it compares - obviously yours should feel a lot quicker as you've had the remap

Thorney - what do you make of VIX's dyno plot? I agree with Foxy in that I would expect the before and after to diverge steadily, rather than being pretty much the same (and even slightly lower at some points) below 4k, then a sudden increase.
While I agree that what matters is how the car feels, I would expect it to feel punchier at low revs as well as pulling harder at the top end - especially considering you are comparing a standard car to one with a free flowing exhaust and induction kit. The dyno plot would suggest that this is not the case