Triumphrat

XTREMESTEVE81

I have a 2002 955i with about 26000 miles and I need some more power. I dont have a lot of money so I need something thats inexpencive. I have pipe, power commander, air filter, and I changed the gearing on it. I have about 125 rear wheel horse, but I want more. Does anybody have any pointers for me?

DEcosse

You're not going to get much more without forced induction - either Supercharger or Turbo.
'Something inexpensive' pretty much rules that out.

HP isn't cheap, regardless of the medium employed.

You might get a few more ponies with a TuneBoy vs PC as you can change the timing as well as the fueling, to get you to 130 & change maybe.

__________________

T'Rat.net BOTM November 2009

XTREMESTEVE81

Thank you. Thats a start. I know horsepower isnt cheap. Im not that familiar with tuneboy.

DaveM

Looky here:

http://www.tuneboy.com.au/

AND here:

http://www.triumphrat.net/tuneboy-help-tips-and-tricks/

DaveM

__________________
My current album;
http://www.triumphrat.net/memberalbums/showgallery.php/cat/500/ppuser/2712/sl/d
My Original members album:
http://www.triumphrat.net/photogallery/v/member/album789/album810/
Two Triples are better than one :)

XTREMESTEVE81

AWESOME!!!! I will have to try that out soon....Thank you!

malott442

I know that the Triumph dealership in Spring Hill, FL has a machinist that will do some really nice headwork. He makes claim to double digit gains without changing cam profiles.

Getting a cam custom ground runs just under 1500 last time I checked, and the head work will run you 1200 or so. You would be looking at a significant gain, I would reach out on a limb and tell you what to look for, but don't want to put my foot in my mouth. I've never seen what head and cam work will do to these bikes.

Is your 120 something on a Dyno Jet? Filter and pipe have easily pushed past 130. I've seen 135 on an 03 with a K&N and Micron slip on.....

bradtx

malott442, It's very difficult for two chassis dynos to read the same. We use the same one for before and after comparisons. There are four that we have used, all DynoJet and because of weather station location and program versions can have a 15% difference (the one we typically use actually reads the lowest of the four). Mustang dynos load the rear wheel differently from DynoJet and typically measure lower RWHP than a DynoJet. Another source of inaccuracy is using the dyno's drum speed rather than using a tachometer pickup on one of the coils.

XTREMESTEVE81, Is that an actual dyno number or an estimate? Typically RWHP readings on an OEM '02> D955i are 127-130. A can and tune are usually good for a 5-8 RWHP gain. Best bang for the buck is regearing.

Brad

XTREMESTEVE81

Thanks for the advice. I did dyno it and thats what I had was 125 RWHP. I have a K&N air filter, Power Commander, and the Triumph High Rise Carbon Fiber pipe. Does anybody know what gain I would get if I plain the head surface down? I have done that on a car engine and it seemed to work. I dont know if that would work for this bike or not. Does the Triumph updated map and power commander give me a few more horses? I got my bike in 2006 and never put the updated map in it.

bradtx

XTREMESTEVE81, Double check, but for a PCIII I understand it's best to use the base map. Generally milling a head surface is primarily felt in better throttle response due to raised compression. The second gen 955 is already at a respectable 12:1 static compression ratio so unless the head is warped I wouldn't go there.

Brad

DEcosse

It won't make any difference what starting map you used if you had it dyno tuned for the PC3 - however 'off-the-shelf' maps typically are referenced to OEM base map.
Regardless of which, at this point if you install the Triumph 'TOR Exhaust' base map, your PC3 map will be off.

Did you install the O2 sensor bypass plug?
Won't affect your mid-range & top end but without it the ECM will just 'tune around' any changes in the PC3 map at the part throttle end.

Is it a PC3 USB?
If so, did you install the Accelerator Pump feature?
Not sure how much difference that would make on the Triumph (I use Tuneboy) but on the TL, it gives you better 'snap' when you open the throttle.
The instructions for loading that are a bit vague in that they don't mention the following: - what I ultimately discovered is it will not load if you have the main program open. So close that and THEN run the utility. Note that you will need the auxiliary battery connected when you do that.
After you run it, open main program and you should see the option in the main map under tools - set it per the suggested starting condition which works well for street bike.

Are you using stock gearing?
You would also benefit from changes there - general consensus is one down at front two up at rear (net 17/44)
That will get you up in power band and improve the rear wheel torque.

__________________

T'Rat.net BOTM November 2009