10 replies to this topic

[Jardon]

lookforjoe, on 08 June 2011 - 12:33 PM, said:

Do you have any actual timing logs to share? I'm curious to see exactly how much timing you are getting in similar load ranges.

I'd be curious to see what kind of 60-120 times you could make, 60-100 is always easier to reach than the extra 20 up top. My AWD 60-100 is 5sec or less.

Datalogged 100-100kmh a few times (softloader logs canbus data is spot on with my GPS) and got 12.4 secs average. That is a huge come down from 10.5 secs on my speedo - P2 gauges can be VERY badly calibrated. I upchanged at 6000 rpm and the "through gears" 60-100 mph is 6.3 secs which I am pleased with. I still can't get below 5.6 secs with a 3rd gear only pull. 12.4 secs is same as an E46 M3 which I guess is pretty quick for 3800lbs. IAT's were <20C and boost peaking at 1.35 bar with an ambient of 15C.

Logged some 4th gear pulls and got peak MAF of 275g/s (peaks ~265 in 3rd so I guess more load = more MAF?). 275g/s is 990kg/hr.

WOT 4th gear advance logs - AFR 11 all the way:

rpm degrees Boost

3360 13.5
3650 15.0 18psi
3900 15.0
4100 17.0 19psi
4300 18.0
4370 18.0
4550 18.5 21psi
4640 18.5
4760 19.5
4900 19.5
4960 20.0 21psi
5160 21.5
5300 22.5
5500 23.0 19psi
5700 24.0
5800 24.5
5940 25.5 18psi
6100 26.0
7000 30.0 16psi
7500 33.0 16psi

[dublin14]

Jardon, on 09 January 2012 - 08:23 PM, said:

Datalogged 100-100kmh a few times (softloader logs canbus data is spot on with my GPS) and got 12.4 secs average. That is a huge come down from 10.5 secs on my speedo - P2 gauges can be VERY badly calibrated. I upchanged at 6000 rpm and the "through gears" 60-100 mph is 6.3 secs which I am pleased with. I still can't get below 5.6 secs with a 3rd gear only pull. 12.4 secs is same as an E46 M3 which I guess is pretty quick for 3800lbs. IAT's were <20C and boost peaking at 1.35 bar with an ambient of 15C.

Logged some 4th gear pulls and got peak MAF of 275g/s (peaks ~265 in 3rd so I guess more load = more MAF?). 275g/s is 990kg/hr.

WOT 4th gear advance logs - AFR 11 all the way:

rpm degrees Boost

3360 13.5
3650 15.0 18psi
3900 15.0
4100 17.0 19psi
4300 18.0
4370 18.0
4550 18.5 21psi
4640 18.5
4760 19.5
4900 19.5
4960 20.0 21psi
5160 21.5
5300 22.5
5500 23.0 19psi
5700 24.0
5800 24.5
5940 25.5 18psi
6100 26.0
7000 30.0 16psi
7500 33.0 16psi

Thats not bad for a station wagen. Nobody in an M3 is expecting not to be able to pass a Volvo family wagen Be nice to see a K24 on there and then compare.

Edited by dublin14, 10 January 2012 - 01:09 AM.

[URO_S60]

Jardim besides tune is your head stock to be able to run up to 7500? I see you've done injectors and and a tune to support fuel and ignition that high but curious to see what else you have done to reach those RPMs. I'm on a Rica stg 3 tune white's and a 16T I haven't tried to reach the rev limiter but I assume there is now way my war would go another 1000rpm over stock.

[Jardon]

URO_S60, on 10 January 2012 - 09:38 AM, said:

Jardim besides tune is your head stock to be able to run up to 7500? I see you've done injectors and and a tune to support fuel and ignition that high but curious to see what else you have done to reach those RPMs. I'm on a Rica stg 3 tune white's and a 16T I haven't tried to reach the rev limiter but I assume there is now way my war would go another 1000rpm over stock.

My head is stock. Speaking to people who know more than me they felt 7500rpm was "safe" as the ME7 heads flow better than the 4.3/4.4 and the exhaust VVT helps too.

I change up well before that 99% of the time as torque has dropped like a stone in higher gears - usually by 6000-6500 rpm in 3rd and 5500-6000 in 4th. However, at low load when flow is less of an issue it is nice to be able use it ie: first or second gear - mostly first. If I'm in a hurry changing up before 7000rpm in first gear "feels" too soon as there is still plenty of go. It also means I can change up at 7000 rpm in 2nd without accidentally hitting the limiter - I don't have to use the extra 500 rpm to get a benefit from it.

[Jardon]

How do I edit my posts?

Wanted to add that it is also quite useful on track to be able to rev out to 7000-7200 rpm if changing up from 3rd to 4th isn't worth it - the torque may have dropped off but it's still quicker than slotting in a gearchange in with a corner approaching (for my driving at least).

[URO_S60]

Thank you, and I didn't mean to go on a tangent OP (I often forget about PM's).

That info is enlighting I wish I knew more about it when I was back at the 1/8th because I was shifting both 1st and 2nd @ 6k and knowing that now I probably could have only shifted first to second and wind them both out and save even a split second for one less shift (clearly 1/4 miles tracks you will need 3rd reguardless).

One last question is will the automatic tranny tolerate going as high as 7-7200rpms?

[lookforjoe]

You have healthy amounts of timing in that log - but AFR's in the 11's really is too rich - what happens if you lean it out?

You also seem to have significant boost pressure drop, and generally poorly regulated over the rpm range - what are you using to govern it?

[Jardon]

lookforjoe, on 13 January 2012 - 03:46 PM, said:

You have healthy amounts of timing in that log - but AFR's in the 11's really is too rich - what happens if you lean it out?

You also seem to have significant boost pressure drop, and generally poorly regulated over the rpm range - what are you using to govern it?

I have run leaner and consequently less advance but with disappointing results.

More boost up top isn't an option with such a small turbo - they will support ~1 bar at the stock redline so mine is doing well. Running ~1.3 bar to 5500 is spot on for a 19t too. The stock BCS - why the poor control comment? It's very stable indeed!!

[lookforjoe]

Jardon, on 15 January 2012 - 07:29 PM, said:

The stock BCS - why the poor control comment? It's very stable indeed!!

You're going from 18 - to 21- then down to 16. I would have expected a K24 to be making max boost before 3600

I'm just used to boost being within 1 psi across the range, but that's with an ebc.

[Jardon]

lookforjoe, on 17 January 2012 - 02:54 AM, said:

You're going from 18 - to 21- then down to 16. I would have expected a K24 to be making max boost before 3600

I'm just used to boost being within 1 psi across the range, but that's with an ebc.

It's a 19t and would make max boost much lower but for driveability in a fwd car we fed the boost in progressively. it's also a stock block and rods so I didn't want full boost too low down.
Boost doesn't waver at all and drops as a 19t will. Even with conservative boost at low rpm traction is an issue - that's with a plate diff and sticky tyres.

[lookforjoe]

Jardon, on 17 January 2012 - 07:26 AM, said:

It's a 19t and would make max boost much lower but for driveability in a fwd car we fed the boost in progressively. it's also a stock block and rods so I didn't want full boost too low down.
Boost doesn't waver at all and drops as a 19t will. Even with conservative boost at low rpm traction is an issue - that's with a plate diff and sticky tyres.

Makes sense.