1.9L VW/Audi/Skoda/SEAT Diesel Mod alert! :) - Fuel Economy, Hypermiling, EcoModding News and Forum

ConnClark · 01-25-2011, 01:30 PM

Autospeed has a new series on modding the 1.9L TDI. The first part covers taking base measurements.

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They tend to be performance oriented, but if you do everything they do to a diesel except turn up the fuel you'll get better economy and power too

Julian Edgar · 01-25-2011, 06:20 PM

It actually turned out in the end to be a lot more complex than just power vs fuel economy but the end result is good in both.

ConnClark · 01-25-2011, 08:45 PM

Julian,

I'm sure it did turn out to be more. I was just noting that for people here in this forum, they might want to avoid the turning up the fuel step to maximize economy. (I know you can get the same economy if you keep your foot out of it but if the temptation isn't there ... )

Thanks for the great articles.

Julian Edgar · 01-25-2011, 08:53 PM

As the series will (eventually) reveal, fuel economy improved after the remap.

Arragonis · 01-26-2011, 05:17 AM

Looking forward to the next part on making your own intake. Did you look at the PD 160 intake as this can be a direct drop-in replacement and it has much less of a change in diameter from the intake panel to the pipe.

I'm also looking forward to seeing if this improves performance. Some people on Briskoda have claimed all sorts of benefits from the PD160 one including increased power, more responsiveness and greater sexual attractiveness - but with no hard data.

Piwoslaw · 01-26-2011, 06:21 AM

Nice article

Waiting for more to see what I can try on my HDi.

Julian Edgar · 01-26-2011, 04:07 PM

Quote:

Did you look at the PD 160 intake as this can be a direct drop-in replacement and it has much less of a change in diameter from the intake panel to the pipe.

Yes looked a this. Very expensive locally.

Without giving away too much, I can say that the new intake flows very well and the impact on car performance was interesting!

Arragonis · 01-27-2011, 06:53 AM

Quote:

Originally Posted by Julian Edgar

Yes looked a this. Very expensive locally.

Without giving away too much, I can say that the new intake flows very well and the impact on car performance was interesting!

Looking forward to seeing that one then. The intake is spendy, over £90 here including VAT. It was under 50 until SEAT dealers realised they could make extra money.

Julian Edgar · 01-27-2011, 04:28 PM

New intake cost very little - maybe AUD$30

ConnClark · 02-09-2011, 01:23 PM

Julian,

Very strange results from your latest installment. It goes contrary to everything I have ever read and experienced with a diesel. Numerous papers and test stand experiments show that a diesel with a leaner mixture ( more air and using the same amount of fuel ) produces more power.

With the lower pressure drop on the intake there will be a higher pressure in the rest of the intake. This would reduce the amount of EGR that can be used. I'm betting that the emissions computer is restricting fuel to limit NOx.