2130# car, on 24.5's, builds 12-14# on 2 step. I've tried leaving at different rpms anywhere from 6000-7000rpms. Last night it bogged from 7000 and broke the bell housing so I didn't get to try any changes. I do my burnout in 2nd using the 2 step and it does fine. I can't figure out why it's bogged four times in a row. Any ideas?

 

I'm running on 23" m&h and @ 7.5psi-8psi in the slicks I leave at 8100-8200rpm @ about 8psi from the turbo

 

I don't think it's a matter of not enough boost or rpm. I think there's something going on with the antilag not coming off soon enough. That's why I posted the screenshot of the two step and antilag. Anyone that's familiar with setting that up see anything wrong with it?

 

I had 10# in the slicks also so there's no reason the car should be bogging.

 

If you're datalogging 12-14 lbs, then I'd say it's working. Try leaving higher.

 

You could try bringing the mph down, but we normally leave it around 10mph and let the car ride out on it, how do the logs look, anything strange, what system is that dies it not have an activation and caut point

 

Looks like neptune.

 

Yes it's Neptune. I haven't logged it at the track. Internal logging never seems to work for me and I didn't want the laptop sliding around in there.

 

The reason I don't think it's rpm related is because the first time I took it I the track, it blew the tires off leaving around 6000. I'm not sure what changed.

 

Just a theory, possible ignition problem in the dash, kills the car, IV seen it happen, with the car running beat on the steering column

 

Log timing and fuel. Very possible you are reaching a section of the tune upon unloading which needs to be adjusted.

I have seen loose harness pins at the ecu cause problems as well which is why I typically run hot glue on the back side to keep the pins secure. Not saying that's the fix but launching at 7000 is a pretty big jolt.

Let the engine idle, pick up the ecu and lightly shake it. If the idle stumbles then you know it's at least possible.

 

Okay cool. Both good points. The car did have an issue on the dyno where it lost all power. We found the problem and fixed it but maybe it's giving a problem again. I'll check that out.

 

what was the problem you had the dyno if you care to share I also had a prob when on the dyno with my alternator, and I seem to be having the same issues with the launch control.

 

Whoever had the car before me relocated the fuse box under the dash and the terminals on the power wire they used had corroded and was barely connected.

 

my off speed is 2mph if that helps

 

Are you transitioning into the high speed cam table and the car is going lean in an area of the map that you hadn't been hitting?

 

That's a good question. I figure once I get the bell housing swapped out, I'll datalog it on the two step and launch it a few times.