Higher Exhaust Temps With Dawes and ITG?
14 June 2002, 11:44 AM
#1
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I noticed last night that the exhaust temperature seemed higher than usual and wondered if that might be expected as a consequence of the Dawes (16 psi now) and ITG filter? The colour of the exhaust pipe has lightened from the usual black suggesting a leaner running, which would increase temperatures. No pinking detectable.
Any thoughts?
Thanks, Jon
Any thoughts?
Thanks, Jon
14 June 2002, 01:06 PM
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What car? Do you have a boost gauge and what's the part throttle boost like? What size is the bleed hole in the dawes?
If you're noticing an exhaust colour change (without using octane-booster
), be v.v.v.v.careful......
Richard
If you're noticing an exhaust colour change (without using octane-booster
), be v.v.v.v.careful......Richard
14 June 2002, 02:11 PM
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Richard,
It's UK MY99 with a boost gauge. Dawes hole is 1.5mm. Part throttle boost can get quite high - towards the 16 psi max held at WOT. I use optimax without any octane booster.
Thanks, Jon
It's UK MY99 with a boost gauge. Dawes hole is 1.5mm. Part throttle boost can get quite high - towards the 16 psi max held at WOT. I use optimax without any octane booster.
Thanks, Jon
14 June 2002, 02:51 PM
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Sounds like part throttle *may* be causing it - but I've never come across such problems before. Maybe check that the 1.5mm hole isn't blocked by oil?
Certainly, you should check your AFR - you could use DeltaDash or a dedicated AFR meter..or a digital voltmeter...or even a dealers select monitor. I'd suggest getting it checked ASAP though - tailpipe changing colour doesn't sound good to me.
Richard
Certainly, you should check your AFR - you could use DeltaDash or a dedicated AFR meter..or a digital voltmeter...or even a dealers select monitor. I'd suggest getting it checked ASAP though - tailpipe changing colour doesn't sound good to me.
Richard
14 June 2002, 05:03 PM
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Hmmm... i'm worried too now. just been reading some past threads JB referenced elsewhere, and this part-throttle/high boost/high EGT seems to have been noted before.
Perhaps i should wind the boost down a little or just take off the Dawes and wait for the Tek2?
Perhaps i should wind the boost down a little or just take off the Dawes and wait for the Tek2?
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14 June 2002, 05:31 PM
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I've got a MY99 with a Dawes set at 16.5 PSI on WOT. John set it up for me and we did a number of runs whilst logging the results on DeltaDash - everything looked just fine.
I've got my log files (which can be viewed with the DeltaDash demo software) if anyone wants them - they were taken in mixed driving conditions after the Dawes was set-up.
I've no other mods.
Richard.
I've got my log files (which can be viewed with the DeltaDash demo software) if anyone wants them - they were taken in mixed driving conditions after the Dawes was set-up.
I've no other mods.
Richard.
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