What did you do to your P2 Volvo today?

[P80GLT]

Spring has arrived at last...

V70 Cherry Blossom.jpg (329.27 KiB) Viewed 3269 times

850 Cherry Blossom.jpg (354.34 KiB) Viewed 3269 times

[P80GLT]

Winter is officially over even though there is still a ground frost in the mornings putting my Gladioli in danger. The summer Thor wheels and Goodyear tyres are back on in anticipation of warmer times.

Winter Mimas 16"

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Summer Thor 17"

Thor Summer 17.jpg (341.62 KiB) Viewed 3206 times

Never been refurbished and still on the original factory finish

Wheels n Tyres.jpg (323.46 KiB) Viewed 3206 times

[Blacklab467]

Beautiful cars both of them. How much negative camber do you run on the rear? Maybe it’s the photograph but it seems like there is a lot of negative camber on them both.

[P80GLT]

Thanks Blacklab467, the car is standard factory, the 4 wheel alignment I had done last year by the top specialist in Scotland set everything to factory spec. iPhone camera likes to skew the image

Side view.jpeg (256.27 KiB) Viewed 3158 times

[850 LPT]

Beautiful cars P80GLT. I wonder if those mud flaps for the P2 wagon are still available, I have the twin to your car without the turbo engine, but no mud flaps.

[P80GLT]

Thanks 850 LPT, mud flaps no longer available from Volvo but if you search long and hard online there is usually someone who has a set sitting on a shelf somewhere. I managed to get mine from my local dealer, they had been on the shelf for many years and the parts guy who found them said they weren't even on the computer system

[Blacklab467]

Thanks Blacklab467, the car is standard factory, the 4 wheel alignment I had done last year by the top specialist in Scotland set everything to factory spec. iPhone camera likes to skew the image

That looks better, I know how you are with your cars and didn’t expect something like that to be less than perfect!

[dikidera]

I edited the 2.4i's fuel and VVT maps. I shall see what the result will be. I advanced the VVT by 3 degrees more in the 2100-2500 rpm range where I believe I have an intake resonance or intake/exhaust valve overlap that reduces my power.
I also opted to add more advance up the top between 5100-5500, potentially gaining torque and losing some HP. I have decided that I want more torque up in the rpm range, of course how this will affect the power in reality and whether it produces more knock is unknown without a dyno. The reason being when you overtake cars with an auto, you end up in the RPM region where torque starts to fall off sharply after 5000 rpm. The automatic has specific gear ratios that always puts me in a low torque scenario up the top.

For fuel I tried going richer earlier in the RPM range at higher load conditions such as with WOT. I simply noticed that the engine was lean burning too much especially with the spark plugs in the condition they were. This could be a bad oxygen sensor, or something else wrong with the car, but I also noticed more knock. So I tried to compensate with more fuel.

Adding more VVT timing can produce knock as well, but the car has a knock and no knock map, which means if it senses knock it will use the more conservative map.

Today I will also be adding a K&N filter. I know people have mixed feelings and mixed results about these. They don't filter well and for some they dirty the MAF sensor, causing it to fail early or simply cause problems.

I then went into Engine Analyzer Pro and tried to reverse engineer the NA's camshaft duration, overlaps and so forth. I was able to come up with this close enough graph with the simulator. This is the graph without a VVT into the equation.



It correctly predicts the torque dip between 2000 and 3000 rpm.

[P80GLT]

Today I cleaned the Mimas wheels ready for storing until the autumn.

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An elderly neighbour gave me a bottle of Greased Lightning Showroom Shine 5 or 6 years ago and it's been sitting on a garage shelf ever since, so today I decided to try it on the inside of the wheels. I am thoroughly impressed with the results, it removed all the winter salt, tar spots and rust marks caused by the discs and they wheels look great again. No I wouldn't use it on the paintwork but for the inside of the wheels it is perfect

GREASED LIGHTNING SHOWROOM SHINE.png (155.46 KiB) Viewed 2986 times

[dikidera]

Well, a few disappointing things.

The fuel maps I edited, the ones that BSR also modify to potentially increase fuel, seem to do nothing, at least not where I expect them to. Looking at them again with fresh eyes, it could be fuel maps related to startup enrichment. In which case, BSR and others never really managed to increase the fuel delivery beyond the first 60 seconds of startup.
I have another map I did not try to modify. I will see if that one does what I think it does, and yes BSR also modify that one.

The VVT maps took effect but I cannot say I noticed anything, the advancement was very little. And without a dyno I cannot presume to say whether I gained or lost power.

The K&N filter was installed today, I honestly expected a bit more lower end torque simply because it is high flowing AND the old filter was dirty as hell. However it almost felt like I lost power. If I have lost power this is because of only one thing, changes in turbulence. Of course I cannot really tell without a dyno.

This is not the best representation and the data is not correctly aligned but:



Left is old VVT map + old filter. Right is with my VVT modifcations and K&N filter.

The graph is broken however, notice that the RPM grid lines do not correctly reflect the red RPM line, so at first glance things may seem weird.