EGT values

[A80Avant]

In speed density systems you have VE table for providing adequate fuelling at all RPM's.
If you have issues with not enough fuelling, it is likely your IAT and VE compensations are off

That's why at least in theory mass-flow systems are much more accurate - they don't need to guess VE.
However, because a MAP sensor is much, much more reliable than a MAF sensor and both systems can use WBO2 feedback all this is very circumstantial.

there is a IAT compensation but not a VE compensation. There is a basic VE fueling map. That gets compensated for TPS and IAT on a different table. There are no issues with fueling but a dyno will allow for more accurate tune on these areas.

[Rocco]

this is what i have read :

the EGT sensor is in the higher part of the downpipe,just by the turbo hotside

this values are always with my shorter 5th gear

rpm----------km/h----bar----ºF
3.500--------125.......-0,4....1300 = 704ºC
4000............140.......-0,4....1340 = 726ºC
3000............110.......-0,3....1250 = 676ºC
3500/5000.WOT.........2........1450 = 787ºC

oil temp: the wider signal between 60º and 120º in oour oil temp gauge
water temp: 85/87ºC driving in the motorway

exterior temp 9ºC

[butchone]

realy you dont want egt to go over 850*c in hi gears and long periods if the motor is to last, higher temps will kill most engine componants. you could try 5% meth mix but keep you eye on afr

[Rocco]

a higher AFR values ( leaner mixture) will gives more power but EGTs will increase a lot true? leaner AFR values are only nice with +100 fuel Octanes true?

[prj]

No.
Read a book Rocco

Timing and boost is what gives power, fuel is just a tool to combat temperature.
Of course if you go too rich or too lean you will hurt power, but there is no point in doing that.
You will make more power by backing off timing or boost than running stupid rich.

[Rocco]

No.
Read a book Rocco

Timing and boost is what gives power, fuel is just a tool to combat temperature.
Of course if you go too rich or too lean you will hurt power, but there is no point in doing that.
You will make more power by backing off timing or boost than running stupid rich.

thank you very much Dmitri like always

[Dan]

Read a book Rocco

http://www.youtube.com/watch?v=GlKL_EpnSp8

Sorry, had to.

[butchone]

rocco hi octain fuel allows you to exploit the timing giving you more advance adjustment because its more det resistant = more power. meth, bioethenol etc are very hi det resisting fuels but havent got as much energy as petrol so you need a lot more of it for the same bang. they also run a lot cooler than petrol. running lean on hard accelleration will kill the motor, never go leaner than 13/1. also cooling the egt with fuel is limited, as prj says it will at some point sap power. retarding timing also increases egt, so it is a lot of complications (these are just basic ones) to get the best out of a motor, thats why it realy will pay off to use a good mapper

[Rocco]

rocco hi octain fuel allows you to exploit the timing giving you more advance adjustment because its more det resistant = more power. meth, bioethenol etc are very hi det resisting fuels but havent got as much energy as petrol so you need a lot more of it for the same bang. they also run a lot cooler than petrol. running lean on hard accelleration will kill the motor, never go leaner than 13/1. also cooling the egt with fuel is limited, as prj says it will at some point sap power. retarding timing also increases egt, so it is a lot of complications (these are just basic ones) to get the best out of a motor, thats why it realy will pay off to use a good mapper

thanks for the explanation

[Jonnybravo]

I was just about to start a thread along the lines of this one so I'll just post in here.

I'd like to know where I shoudl fit my probe, the exhaust elbow pre turbo has a boss in their for a probe for when it was raced, due to be slightly concerned about a probe falling to bits I don't know if I want to fit one there so if its in the downpipe how far from the turbo would you mount it.

Are Inconel probes as indesructable as people say and if so does anyone know of a supplier ? Failing that can anyone advise a good normal probe to use in the downpipe.

Cheers

[A80Avant]

i have been using a probe ever since i fitted the 3071r before the turbo and never had a failure with the probe falling to bits. If manufacturers say they can widthstand 1200C+ then there shouldnt be a problem. I know it is a risk, but most tuners suggest to fit it on the turbo or before the turbo(EM) to get the most accurate readings. They should have more experience than me in making their suggestions. If they were seeing broken elements that often, the would suggest otherwise.

[Jonnybravo]

I totally agree, do you know what sensor it is that your using ?

[Rocco]

i have this :

http://auberins.com/images/Manual/AUBER1813-instruction1-0.pdf

http://www.auberins.com/index.php?main_page=product_info&cPath=5&products_id=19

[Thuppu]

I have this setup with wideband and egt-sensor: http://shop.vems.hu/catalog/roundwbo2egt-p-101.html Works like a clock.

[A80Avant]

i use the vems sensor as well, only bought from Marc at efiexpress