[Twix]

I went to the drag strip last night, and while nobody there was running spectacular times, I noticed that compared to last year I was having a hell of a time trying to get traction.

The track was Castrol Raceway in Edmonton, elevation somewhere around 3800 ft. Temp started at ~60 and went down to about 50.

Car was running Shell 91, tires at 22psi.

The problem was obviously traction. It was too cold to hook up. But I did notice that when I got to about 5500 RPM in 2nd, the car felt like it shut off. Didn't do that in 3rd or 4th.

Best time of the night was 13.79 @105. Best 60' was 2.28.

How do you guys with manuals launch?

Last night I found running with the car in sport+ ran the best. I'd hold about 2000 RPM and feather the clutch out, otherwise it was massive wheel spin or wheel hop.

Last year my best et was 13.05 @114, I think my 60' was around 2.1.

[J3STER]

Originally Posted by Twix

I went to the drag strip last night, and while nobody there was running spectacular times, I noticed that compared to last year I was having a hell of a time trying to get traction.

The track was Castrol Raceway in Edmonton, elevation somewhere around 3800 ft. Temp started at ~60 and went down to about 50.

Car was running Shell 91, tires at 22psi.

The problem was obviously traction. It was too cold to hook up. But I did notice that when I got to about 5500 RPM in 2nd, the car felt like it shut off. Didn't do that in 3rd or 4th.

Best time of the night was 13.79 @105. Best 60' was 2.28.

How do you guys with manuals launch?

Last night I found running with the car in sport+ ran the best. I'd hold about 2000 RPM and feather the clutch out, otherwise it was massive wheel spin or wheel hop.

Last year my best et was 13.05 @114, I think my 60' was around 2.1.

Glad to see somebody taking the m2 to the drag strip!

Quick question though, was it the same track both times? Even if traction was a issue the loss in trap speed is what has me a little confused. Losing 9mph in the 1/4 is brutal. Any mods?

[Zippster]

Originally Posted by Twix

I went to the drag strip last night, and while nobody there was running spectacular times, I noticed that compared to last year I was having a hell of a time trying to get traction.

The track was Castrol Raceway in Edmonton, elevation somewhere around 3800 ft. Temp started at ~60 and went down to about 50.

Car was running Shell 91, tires at 22psi.

The problem was obviously traction. It was too cold to hook up. But I did notice that when I got to about 5500 RPM in 2nd, the car felt like it shut off. Didn't do that in 3rd or 4th.

Best time of the night was 13.79 @105. Best 60' was 2.28.

How do you guys with manuals launch?

Last night I found running with the car in sport+ ran the best. I'd hold about 2000 RPM and feather the clutch out, otherwise it was massive wheel spin or wheel hop.

Last year my best et was 13.05 @114, I think my 60' was around 2.1.

That sounds like your problem, I have to wonder what would do this, did you check for any codes? Are you sure you didn't hit the rev limit?

[J3STER]

Originally Posted by Zippster

That sounds like your problem, I have to wonder what would do this, did you check for any codes? Are you sure you didn't hit the rev limit?

It might have been a timing reduction because it might have knocked.

[Twix]

Same track. Only mod is the catless down pipe. I think it has the compressor wheel spinning up too fast, the MAP is probably reading too much boost then wasting.

I don't have this problem on the street, but I'm also not opening up like this in traffic.

I think I need a tune to allow for higher boost/faster spooling. Then I can data log to see what's happening. I've heard a few others talking about the car going into limp mode because of down pipes, maybe mine is just on the verge.

[BAN_M2C]

Are you capturing any type of data right now? With a Performance Analyser or Torque App for example?

I see you are running 91 octane, how good is the gas in your area? I am thinking like someone else mentioned above, might be pulling timing because its sensing knock?

[J3STER]

Originally Posted by Twix

Same track. Only mod is the catless down pipe. I think it has the compressor wheel spinning up too fast, the MAP is probably reading too much boost then wasting.

I don't have this problem on the street, but I'm also not opening up like this in traffic.

I think I need a tune to allow for higher boost/faster spooling. Then I can data log to see what's happening. I've heard a few others talking about the car going into limp mode because of down pipes, maybe mine is just on the verge.

That might be causing small boost spikes but the really big peaks happen in the higher gears due to higher loads. So I would be more suspicious of the fuel quality.

[Twix]

Originally Posted by EL BAN

Are you capturing any type of data right now? With a Performance Analyser or Torque App for example?

I see you are running 91 octane, how good is the gas in your area? I am thinking like someone else mentioned above, might be pulling timing because its sensing knock?

Definitely no knock. Shell 91 fresh from refinery here. It's always consistent.

I didn't have any problems in any other gear, just second

[BAN_M2C]

Well I have done pulls where the car lost traction and I feel like its DSC kicking in to get the rears to hook again. It does happen mostly in 2nd gear while running in Sport+ where DSC is just partially off. But it feels like its just cloaong the throttle or something because the car basically halts the acceleration for a full second.

[J3STER]

Originally Posted by Twix

Definitely no knock. Shell 91 fresh from refinery here. It's always consistent.

I didn't have any problems in any other gear, just second

How do you know its not knock? 91 oct fuel is garbage and its evident that the stock tune on the m2 is aggressive and extremely sensitive to fuel quality.

Something is up for sure though, the loss of mph in the 1/4 is substantial.

People have posted dyno's with a little e85 added and they pick up power and get a cleaner powerband from just the 91oct piss fuel.