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The mkiv Supra Owners Club

Warning Light at High Speed


AndyG

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Any ideas..

 

Same bit of road (tested for consistency, varies on other roads), pretty 'new', very even, slight rise, then long long straight at the following leptons:

 

90 + in strong wind

105 + in medium to slight wind

110 + in no wind

 

The red warning triangle light in the centre of the driver's dash flickers on and off (mostly staying on, but flickering very fast). Don't think any other lights, in fact I'm positive that no other lights in direct or peripheral vision come on.

 

This doesn't need to be hard acceleration either, can be gradual trundle up in 5th gear, and as soon as those speeds are hit on comes the light. Reduce it by a few leptons and it's off, increase and it's back on.

 

Supra, N/A, no engine mods, only body mods are skirts and spats, 18inch alloys, and rear visor thingy.

 

I'm suspecting perhaps the boot catch being a bit iffy and getting lift at those speeds?

 

Anyone else had something similar?

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You'd hope that you'd be getting some downforce from the rear wing, not uplift... or am I being stupid??

 

I would say it has something to do with vibration as it is obviously not RPM related. maybe the bonnet trying to lift???

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Originally posted by dannyspeed

the same thing happened to me, warning light coming on at high speeds. check your bonnet is down right. open it and slam it down shut and see if that sorts it. it done it for me.

 

Exact same thing happened to me - mechanic hadn't fully closed bonnet, didn't warn me until I hit 100! :eek:

 

:looney:

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Originally posted by AndyG

Yeah I'd hope to get downforce! I recall reading somewhere that the standard rear supra wing is only good for downforce to 110. Dunno if this is accurate or not.

 

Having had a good look at the profile of the rear wing, I would be surprised if it made much odds at all. Maybe a little but nothing significant. Here's an easy way to check. Next time it rains rub a little food colour across the front of the wing. Go out for a spanking, and then check the flow vis. If it's all nicely streaked backwards then your producing downforce. If it's just dripped off the middle it aint doing diddly squat.

 

Also, if it's producing lift at 80, it will produce more lift at 110, and even more at 140. Thing is though, if it's not particularly efficient, then the drag increase will be v. large. Remember drag squares with speed. I doubt very much if it makes the 3:1 lift/drag ratio we aim for in F1.

 

Sorry to hi-jack the thread. I don't know what's causing the warning light. :conf:

 

Regards

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