Had my car on rolling today

[Rooster]

Been to a rolling road day today and put mine on to try and get abit of a base figure before i start looking into getting it mapped,

Following mods on a 2001 2.0t,

Modified airbox with K&N panel filter,
Jetex 2.5in cat back exhuast,
De-cat (standard cat with internals knocked out)
14T T4 turbo
Dump valve (as if that matters)

Was running a 14psi of boost when turbo was first fitted but knocked down 2 turns on actuater cos it was running lean top side of 3rd gear so not sure whats its running now but its less than 14psi,



235bhp and 210Lbft of torque, if this is right which going on the 3 standard cars that ran and got around standard power i don't have much of a reason to think its not, then am quiet impressed altho a little skeptical

[timway]

Thats interesting.... the 235bhp peak figure seems reasonable doesn't it? but the torque curve looks very strange, I'd have thought it would have peaked at around 3000-4000rpm then started to tail off, and what is that hump above 5500rpm caused by?

[Rooster]

Yeah i know what you mean, it is a Lpt engine aswell so i would have thought the same, could be that the 14T doesn't spin up as fast hence the less torque low down but more further up,

I actually expected it to be abit more up and down all way through rev range due to still running standard map,

[Big T]

Do you know what the whp is? Would be interesting to see what it is compared to mine!!

[SIAMBLUE]

I really do love the look of the 40 series, yes please tell us what your whp was,

Gary.

[Rooster]

Not sure what whp was, my mate video'd it on rollers ill see if he got it or not on video, i was just stood watching computer with my mouth open thinking that carn't be right,

[pyaap]

Hi Rooster,

Which gear were these runs done in? If its 4th gear, I think the car was running really lean beyond 5400rpm which may explain the curious graph above those revs. The sudden dip in power and torque at around 5700rpm could be detonation (?) but to be honest, the RR operator probably would have been monitoring boost and AFR to be able to tell what was going on. I suspect the car was running lean because the 14T turbo really does start to run out of puff around 5000rpm and the fact that you've still got a rising power graph and then some funny "phenomenon" after that to me indicates that the boost / fuelling / ignition at that point is not quite right. I'm not entirely sure what contribution the decat pipe has in all this but I'd say you really need to be sure that its not running overly lean as there is a real risk of engine damage, given the higher compression the 2.0T runs.

[Rooster]

That was one of the reasons i turned the boost down a couple of weeks ago cos i could feel it pinking top side of 3rd gear and didn't want to run the risk of melting something so turned boost down,

Mates just bought a wideband lamba probe thingy so might borrow that off him to see what its doing, need to check fuel pressure aswell as am convinced my pumps louder than it used to be

Originally Posted by Rooster

That was one of the reasons i turned the boost down a couple of weeks ago cos i could feel it pinking top side of 3rd gear

Seems pretty bad if you could feel/hear it! Could the knock sensor be not working?

Originally Posted by Rooster

Mates just bought a wideband lamba probe thingy so might borrow that off him to see what its doing

Yeah I was kind of doing the same thing with the VOL-FCR as the O2 sensors are wideband ones in these cars, and our survey said uh-uh never goes above 0.06V under high boost/revs/acceleration. Well, this all assumes the lambda and the measuring equipment works ok but it seems alright the rest of the time (alright = meaningful data).

Originally Posted by Rooster

need to check fuel pressure aswell as am convinced my pumps louder than it used to be

Thought you'd done that already and pressures were ok?

I now have 2 fuel pumps the uprated replacement one (which I DID want) and the normal replacement one (from the order I tried to cancel!) so maybe you could buy that one if you want, although pyaap has a nearly new one he could flog you probably ££££ cheaper if needs be.

After I fit mine - hopefully tomorrow - I'll report back on stuff and also on what combination of filters/hoses/wires I used.

Pete

P.S: On the torque (and therefore power) curves that hump at high revs does look like a bit of an odd thing, did the place that did the measurements say anything about it? It looks like something ballsed up somewhere to get that weird shape?.....

[Rooster]

I tried to check fuel pressure but tool at work seem to prefer to leak fuel all over my intake manifold rather than read what pressure it was running at,

wanted to take car up road with it on as running it on ramp with your foot on brakes with fuel leaking everywhere's not the best way of doing it,

went out for a drive last night and running it from idle in 3rd gear to redline you can feel that hump in graph as it hits 5500, could just be a big hole in standard mapping of car