very bad bogging on h22 w/ itb

s300 and SManager software questions & answers
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H22ITB
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Joined: Wed Jul 08, 2009 9:47 am

very bad bogging on h22 w/ itb

Post by H22ITB » Wed Jul 08, 2009 9:59 am

The problem happens on the track just about every time. No problems on the street and im not sure why that is. Perhaps the track is too sticky and it bogs me down? but it seems like the engine is not going anywhere whereas on the street, when i shift into 2nd gear, i get nothing but wheel spin so there are no problems. I didn't tune this engine but i was just looking at the map and the problem could be that the tps min and max was something like 6% - 76%
i looked at another itb map and its 0% - 100% that is the default.
could that be the problem? i don't want to change anything and i let my tuner know about the problem long ago. It's just hard to fix because it only happens at the track so when he tunes it on the street and dyno. It doesn't happen.

H22ITB
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Post by H22ITB » Wed Jul 08, 2009 10:07 am

heres the map.
fuel maps might be different but how about the rest of the settings?
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H22ITB
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Post by H22ITB » Wed Jul 08, 2009 6:02 pm

anybody?

megomaniac
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Post by megomaniac » Wed Jul 08, 2009 7:08 pm

does the bogging happen after a bunch of laps when the engine gets hot?
do you think its a heat related problem, cause you probably don't hit those temps doing short blasts on street and dyno,
H22A4
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H22ITB
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Joined: Wed Jul 08, 2009 9:47 am

Post by H22ITB » Wed Jul 08, 2009 9:05 pm

oops, sorry i didn't mention that its a drag strip. I do notice that the motor is very very hot after a run though. Hotter then most other engine bays.

Quade
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Post by Quade » Fri Jul 10, 2009 1:46 pm

I think you're hitting a different area on the map when you're on the strip because it sticky. In other words it's under more load at lower rpms. Those points would need to be logged and tuned at the track.

H22ITB
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Post by H22ITB » Fri Jul 10, 2009 2:04 pm

but that would affect the street driving, no?

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Spunkster
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Post by Spunkster » Fri Jul 10, 2009 2:36 pm

If it is stickier at the track and it is reading form different maps because it is loading up the engine differently then it will have different tuning needs in track conditions than in street driving.

H22ITB
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Post by H22ITB » Fri Jul 10, 2009 4:26 pm

so if i get it tuned at the track, would it have any problems on the street?
i dont get any traction shifting on the street. shifting into 2nd, it spins for awhile and its just at 8k and slowly drops to 7. not much load compared to the track but 2-3 is better.

Quade
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Post by Quade » Fri Jul 10, 2009 6:38 pm

No it wont affect street driving. More than likely you won't be touching/changing the area of the map the car sees during street driving. For example you might end up tuning out the 2000-3000 rpm values around 0map. You might be able to tune out the same area of the map on the street if you move off slowly in 1st gear then select 4th and floor you foot. This will load the engine up at low rpms simulating what is happening at the track. Understand? The object is to try to tune out all the cells possible in the map.

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