Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: SP_3.2 on 17 April 2008, 06:24:43
-
I have had my 3.2 about 2 years when i got it i have it remapped and tgi filter when they did the rolling road test it was 236 bhp before and after 244. What would this mean in real road bhp.
The car was runing on superunleaded and always has. Would anyone know
Thanks
Steve.
-
Where did you get it remapped? I've asked around and, as yet, haven't found anywhere to do my 3.2 :(
How much did it cost too, and can you actually feel any difference?
-
To be honest, Steve, measuring BHP on a rolling road is a minefield, and one of my soapbox subjects so I'm sorry for what follows. ::)
You lose quite a lot of power in the tyres and rollers on a rolling road and unless the operator is careful to correct for these the "power at the flywheel" result won't be accurate.
Some people then say, well, sod all the corrections, let's quote power at the wheels. That's not accurate or meaningful either because the losses on a rolling road are far higher than on a real road and, importantly, they can vary between cars, and depending on factors such as how hard the car was strapped down on the rollong road.
The best method to obtain an accurate "flywheel" figure is to do a power run up to the rev limiter in a high gear. 4th is best on a manual as this is generally the 1:1 gear. Once the maximum revs have been reached, press the clutch, come off the power and let the road measure the losses as everything slows down again. This is called a "coastdown test". A modern rolling road will have the software to evaluate the losses during the coastdown and add them to the power that was measured on the way up, and you can end up with a power curve that's repeatable to within 5% or so.
The situation is more difficult with an automatic gearbox and the results will be less accurate as a result.
Having said all this, the main use of a rolling road is to determine if a small adjustment has made a difference, rather than to generate a figure to blag about down the pub ;), and this only requires a relative measurement. It sounds like your car made an 8 BHP improvement measured on the same rolling road on the same day, and that means more to me than to say it has 244 BHP, because the absolute figure could be way out IME.
Kevin
-
Thats a good point will have to keep the engin in good order so i dont lose any of those exta 8bph. Car is up to 143k still feels good :y
-
Where did you get it remapped? I've asked around and, as yet, haven't found anywhere to do my 3.2 :(
How much did it cost too, and can you actually feel any difference?[/quote]
I think it was a company called chiped uk in Bromsgove cost was about £250
Hope that is of help.
-
Where did you get it remapped? I've asked around and, as yet, haven't found anywhere to do my 3.2 :(
How much did it cost too, and can you actually feel any difference?
I think it was a company called chiped uk in Bromsgove cost was about £250
Hope that is of help.[/quote]
Hmm not far - cams first I think
-
http://www.chippeduk.com
-
Hmm not far - cams first I think
I agree that better cams is a good way to increase performance, but don't you need to re-map the engine around those cams? I would have thought that just changing the cams without re-mapping, at least to compensate for them, could perhaps be detrimental :-/
-
Hmm not far - cams first I think
I agree that better cams is a good way to increase performance, but don't you need to re-map the engine around those cams? I would have thought that just changing the cams without re-mapping, at least to compensate for them, could perhaps be detrimental :-/
I think what Martin was saying is that he'll fit the cams before remap, which makes sense, as it'll be set up with the new cams. If you're going to do any mods make sure getting it remapped is the last one.
... that assumes that they actually get it on the rollers and tweak the map for that engine. I'd bloody want them to for 250 quid! Some "Remaps" are just a download of new firmware - with a modified map- into the ECU with no adjustment. Exactly the same process as buying a chip off ebay but foir ECUs with flash technology.
Anyone considering this should phone them up and ask what they do for the money.
Kevin
-
Are there any downsides (i.e. long term longevity) to upgrading the cams and having a proper remap?