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Said it before & I'll say it again : http://www.seatcupra.net/forums/showthread.php?t=60742

Try logging MAF x 1.323 then taking the result x 5252 / RPM. Block 120 is useless once chipped/remapped.

The turbo will still be going flat out even if the requested was only 50mbar higher than actual. The main reason I run mine at B4 is to curb the low end torque for better driveability - it makes the same peak power on B4 as it does on B9, just the peak torque (boost) is lower.

Hmmm, mine was a smidge lower than yours when we did that swap-testing....wonder if mine's on the way out? Not bad I suppose, lasted 4 years so far on stock airbox/filter.

Long shot but knock sensors are essentially just microphones, they have to be tightened to a specific torque so that they give correct readings. If there is a noise in the engine bay at the same sort of frequency & amplitude as detonation, it's possible that it could be triggering the sensor...

Borg-Warner spec was 0.17kg/s (170g/s) for K0-3 (not K-03s) and 0.21kg/s for K-04. Max boost & max flow aren't necessarily at the same point. I'd imagine the max flow would be at a very low pressure ratio, maybe even 1, due to turbine size restriction.

MAF alone can be misleading Martyn, you need to correlate with req. v act. boost. Remember that standard RS4 I told you about? Gave a peak MAF number suggesting ~420bhp but when looking at boost log, you could see requested was at atmospheric but delivered had spiked slightly as the driver...

The sensors use 0-5 V as it's the maximum range of the Analogue-Digital convertors on board the ECU processor. There is a register which allows you to set different upper & lower limits within that 0-5V for better resolution when converting a narrow range signal. This is based on an older...

I went to buy some plugs from my local SEAT dealer a few months ago. Parts bloke said they'd have to order them in - made me wonder how they do 40K services without the plugs to hand? Didn't bother ordering them, went to VW dealership instead - same deal.

Maybe pointing out the obvious gents, but peak torque is the point at which detonation is most likely. It's when the most air per revolution is filling the cylinder - hence the dynamic compression ratio is at it's highest.

Just had a look and ETKA seems to agree with you. Run the other way, boost pressure can only push the DV open when there is a pressure differential across the top (manifold vacuum) & bottom (boost) of DV in which case it's supposed to be open and it can overcome the spring preload. If boost...

For reference, I call the top of the DV the bit with the small nipple. If you stick boost in to the side of the DV, then you can't push the DV open with boost pressure because the body of the piston can't move laterally. In that case, why would you need a stiffer spring? All it would do is...

If by "chatter" you mean what I think you do, I've had the same issue on my Ibiza running the green spring. It was reduced by a refitting the DV the right way around - boost goes in the bottom & vents to the side (not sure how mine got reversed?) and all but eliminated by replacing the green...

I've got a Corrado VR6 in addition to my Ibiza so I've got plenty of experience with both engines. My advice based on the assumption that it won't be used as a trackday car is : If you want much more than 200bhp, get the 1.8T. Getting a VR6 to 250bhp+ will cost you £2K onwards using a...

While we're clutching at straws, I had another thought last night - secondary air injection, where does the pipe out of the pump feed into the exhaust? I couldn't see on mine this morning but check it's intact - no hairline cracks, etc. Again, I'd expect to see that at idle or incorrect flow...

I bought mine new and the V5 came with 5 doors on it too, back in 2001. Sent it back to DVLA for correction and is now ok.

It could also be a leak on the exhaust side, pre-lambda probe or as I mentioned to Martyn the other day, the Lambda bung is keeping the probe out of the main flow, like the post-cat spacers - would expect to see idle trim way off as well though? Lean is too much air or not enough fuel - hose...

Sorry Martyn, I'm an idiot - I forgot about this. :lol: That's why it seemed to adapt faster sometimes than at others - depends on how long we've been in closed loop. My MAF in your car was heading the same way as with yours towards +25% and limp until we dropped out of closed loop. Your...

PM'd you, Martyn.

No probs Martyn, it's as much for my own benefit as yours, just to compare with mine : http://www.seatcupra.net/forums/showthread.php?t=74633 I did have a brief look at fuel trims, I think mine was ~16%, may go out later & have a proper check. PM me with time/place details, I'm about...