Totally standard turbo, atm

Very odd results from the powergraph today.

I'll let you all know more when I do :confused:

And also could someone please explain what an 'N75' is/was/does etc.

Sorry don't have time to search.

N75 is the solenoid which controls boost as requested by the ECU.

Some of these "spike" and produce more boost than desired.

Bill

N75 valve - all is revealed in this link. It's an Audi forum, but it's the same N75 and wastegate they're talking about.

Just remember that not all VAG turbo cars have wastegates. TT engines and PD engines (130 bhp upwards) have varible vane turbos which the N75 valve controls the vane opening inside the turbo.

Difference is the N75 for VV turbos works on positive pressure not vacuum.

OK. So here's the story so far.

I got my RS 'Superchips' chipped, I didn't have a choice as it's leased and the owner is a Superchips agent. I knew I wasn't going to get the power gains you Jabba types are on about but anything extra would be nice. So initially I was suprised, no massive difference in performance other than more top end, a little smoother, a little more economical. As you all know, me and engines don't really mix so I just thought 'Well that must be what a chip is about then. Pleased but not chuffed. Shame I couldn't go to Jabba.'

After a couple of weeks driving around I noticed that occasionally the engine would 'miss' slightly when accelerating strongly in third or fourth and sometimes when I lifted off the pedal. At low speeds I experienced the occasional flat spot. So I popped back to the garage and had a word. David reckoned it was overboosting (whatever that means) and a little fine tuning was required so it went in this morning for that. On picking the car up he said the adjustment would make for a more progressive delivery and on the run over to Chesterfield to Noble Motorsport the problem seemed to have been cured.

Now for what we all want to know. A very disappointing 170 bhp @ 5654 rpm and 188.9 lb/ft @ 3326 rpm. Also from what I can make of the graph, plus what they were saying at Nobles, boost is showing a maximum of just over 13 psi at around 3000 rpm. (Does that make sense?) Unfortunately they did not have another stock 1.8T 180bhp car on their system to compare with but the general consensus was 'That ain't good'.

Basically, what the hell is going on? Apart from the tweeking this morning does this explain my lukewarm welcome into the world of performance enhancements?

Any thoughts would be most welcome.

By the way, I don't have a scanner but even I can see that the bhp/torque/psi curves are rather erratic.

Sorry to hear that Rich, those figures are, for want of a better word..Pathetic.

I'd be asking for a return to standard, and a full refund if i were you.

shout scream and as MH says get your money back and the car returned to standard

Hold on a minute..

Are those figures at the road wheels, or "engine power" figures?

If they're engine figures, you're way down on a standard RS !

If theyre "at the wheels" figures, they're still decidedly poor

I'm not going for the money back thing straight away. He's obviously not doing something right and/or something isn't right. I'll let him have a go at getting it right. The downside is that unless a correction is made that pins me into my seat while I career wildly all over the road trying to control the beast that has been unleashed, I have to keep booking into Nobles in Chesterfield to test the results :(

Plus, I know it's pathetic. Don't rub it in.

More feed back required Briskoda brothers.

it is your call at the end of the day rich personally i wouldnt let them near my car again

Rich,

the intention was not to "Rub it in", its just that pathetic is the most suitable word for it.

However this does highlight perfectly the risks of "generic" plug & pray re-maps.

Even though REVO & APR appear to be relatively consistant, Superchips seem to be a bit hit & miss.

As for the recurring RR costs, you know where to send the bill

Bit of a disappointing day today :(

Rich,

the "drop off" in power feeling is definately htting overboost and then dropping back to normal boost levels.

Many of us have this even with Jabba. Can be tuned out and although it doesn't effect the final figures car won't have that "rush" feeling during acceleration.

If the figures you got are at the fly wheel......not so good. At the wheels, giving transmission losses, it still only slightly better than standard.

Jon had a Superchips and was getting around 200bhp. Chris also had Superchip giving around the same although he did complain is wasn't giving as much as claimed.

Were you running Optimax or unleaded? If is was UL and the figures were taken at the wheels then it's probably about right. Using Optimax gives approx. 10bhp on average. I got this from comparing those who had Jabba remaps with UL in mind and those who had the "Optimax" programme.

So, using my very rough calculations...taking a 10% transmission loss (probably incorrect) would give you around 190bhp at flywheel plus 10bhp for Optimax would give 200bhp.

You also have to figure in the accuracy of the rolling road plus bay temp and ambient pressure.

Well that's my explanation.........anyone want to come up with a wackier one?

Seriously I'm sure one of the Jedi Masters wil lahve a definitive answer for you.

Cheers.

Adrian.

Adrian,

Even 190 @ the flywheel is dubious, bearing in mind my supposedly "tight" 4000 mile 180 Bhp RS showed around 185 pre Jabba.

Geoff,

true enough!

Just suppositioning and trying to make Rich feel a bit better as he can't get Jabba-ed.

Even I got 214bhp with the temp being 39deg, low pressure and a tank of dodgy Opitmax.......sorry Rich.

Personally I have always heard uncomplimentary things about Superchips although as I said Jon was happy with his.

Just about all VAG cars are quoted under actual power I think due to German insurance restrictions.

Originally posted by SkodiRS in this post

Geoff,

true enough!

Just suppositioning and trying to make Rich feel a bit better as he can't get Jabba-ed.

Fair enough mate, though i'd rather the guy got what he paid for than see him feel better with what he currently has

Yep...agree with you totally.

I'd be pretty p*ssed if I had the chip changed on my car and it produced less than standard.

More info here ( might cheer you up a bit, your not the first person who didn't get expected results, and probably wont be the last )

Seat cupra thread

Unless a standard car was run on the rollers just after yours, its impossible to say yours is worse than standard, only worse than standard 'quoted' figures.

My APR chipped car is going to Well Lane on Sunday, and will be run just after my brothers Vento VR6 (standard 170ish bhp), as well as other cars ( Club GTI day ). If other cars dont make expected bhp, and neither does mine, then i wont be too bothered.

Probably not as bad as you think rich, dont be to down about the figures.

Phil.

Originally posted by SkodiRS in this post

Yep...agree with you totally.

I'd be pretty p*ssed if I had the chip changed on my car and it produced less than standard.

It does rather defeat the object of a re-map doesn't it ???

Rich, if this guy tries to question the Rolling Road you used, tell him he's welcome to take it somewhere else (with you present of course) and prove everything is OK.

I strongly suspect that will not be the case though.

Rich,

You mention in this post that the torque, psi, and BHP figures are erratic.

Could it be the dreaded "surging"?

Just found this with Google - it explains surging cause and cure better than I can.

Good point Mike...

Rich, did they plug any diagnostic kit into your car, to check for fault codes ?

If not, maybe a quick visit to your dealer is in order

Rich, I am pretty sure that everyone who has their 180bhp engines Jabba remapped has seen immediate and very noticeable improvements in performance. (And those of us with the 150bhp engine get relatively awesome performance improvements!) I would ask for your money back and think again if a check by a dealer reveals no fault codes.