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Toymods » Track Talk » Why quads should be boxed (Lessons learnt at Mallala)

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takai
Forums Junkie


Location:
Adelaide
Registered:
May 2003
 
Re: Why quads should be boxed (Lessons learnt at Mallala) Tue, 03 May 2005 11:40 Go to previous messageGo to previous message
Ok, i pulled apart the intake manifold yesterday, and pulled some data from the minimal datalogging which was stored.

From the scorch marks in the intake manifold (and small amount of soot) the fire started in cylinder 4, which seems to make sense seeing as it had the least amount of air flowing into it (filter sandwiched against brake booster and clutch master), and therefore probably the highest intake temp let alone propensity to backfire.

In addition the fire was going for a mere 1s (according to the change in temp recorded by the temp sensor, so maybe slightly more due to sampling speed) before the engine stalled (can see the voltage drop). However, the ECU was still getting a CAS signal just after the engine stopped (for 4-5 seconds) so im guessing that it may have been a complete lack of spark. I havnt had a chance to find the culprit of this yet, but im betting on either a dodgy connector, or the coil failing (again). Ive already had one coil fail, while we were dyno tuning the car, so that is high up on the agenda to check.

I think thats about all i could figure out from the 10s of onboard logging i could get off the Haltech. Wish i had had the laptop hooked up so it could store it all, just glad that there seemed to be that much in the memory buffer.
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Read Message   Why quads should be boxed (Lessons learnt at Mallala) takaiMon, 25 April 2005 12:51
Read Message   Re: Why quads should be boxed (Lessons learnt at Mallala) 4ageezaMon, 25 April 2005 13:25
Read Message   Re: Why quads should be boxed (Lessons learnt at Mallala) ArchMon, 25 April 2005 13:31
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Read Message   Re: Why quads should be boxed (Lessons learnt at Mallala) Simon-AE86Tue, 26 April 2005 07:25
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