Given the choice, would it be better to be able to measure EGTs or AFRs? Or is the best option really to be able to monitor both? I've had an extra lambda boss welded into the bottom of my downpipe but was wondering whether I should also have an EGT boss put in at the top.
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'93 S4 Avant now back on the road complete with new shiny go faster bits. -
i
would deffo say both..japanischer industriabfall nein danke!!
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Wideband definitely...
An EGT meter is really only needed by tuners on large turbo setups when they are ensuring EGT values are safe. On a monster turbo install where its mapped to be close to the limit then it would make sense to install an EGT guage.
As to an EGT boss - there is a point on the factory exhaust where you can install a probe - it was provided there to hook up gas analysing equipment on the 3B engines, but then removed later on... A bolt blanks it off when not in use and its a pretty good location for measuring EGT shortly after exit from turbo.Paul Nugent
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Ermm. Go for both, there are units that have both in same gauge. EGT is really needed when playing with "small" restricting turbos, because of backpressure caused by those. With Monster sizes you normally see EGT dropping radically, because engine can breath through those monsters quite well
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I think the opposite ...
WB is usefull when you tune your car .
But when you drive it ?
Is it important to know that you're running 11.0 A/F ? Or 12.0 ? Or what you want ?
It's more important to know that you're casting your turbo ...
You can running very safe A/F , but having some HIGH egt .
This is my point of view , as young engine tuner ...
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i opted for an EGT rather than a wideband,because it is more easily looked at and after a good map,you only need to pay attention to it every once and a while.Wideband wont tell you much unless you are tuning and mofiying your car frequently.
Only now that im going the VEMS route,did i install a wideband bung to use.Comment
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I think the opposite ...
WB is usefull when you tune your car .
But when you drive it ?
Is it important to know that you're running 11.0 A/F ? Or 12.0 ? Or what you want ?
It's more important to know that you're casting your turbo ...
You can running very safe A/F , but having some HIGH egt .
This is my point of view , as young engine tuner ...
AFR is critical, especially on a turbo car. A dying fuelpump, a clogged filter, clogged injectors, etc can cause a dangerously lean condition and melt pistons or detonate an engine in seconds. EGT is nice to know, but compared to AFR, it is next to worthless if you run a sound setup. On E85, EGT drops by approx 100 degrees C, so it really doesn't come into play much.1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on AlcoholComment
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i have already mounted and installed the innovatec motorsport wideband
runs perfect¡¡ and it is very sensible¡¡
go first for it... or for both¡¡
I´ve destroyed one 3b head..because one RS2 injectors did not work 100% well and after 50kms my head was holes between the cylinders hole...
with a ARR gauge surelly may this kind of problem never goes to destroy the head....RED Mitsubishi Lancer Evolution VI TME nº 16 of 250
BLACK Mitsubishi Lancer Evolution VI TME nº 189 of 250
LWB Audi Sport Quattro projectComment
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Audi S2 -1994 | 480 Hp 650 Nm | FlexFuel | MaxxECU | 3" Stainless | Porsche GT3 Front Brakes
http://www.garaget.org/?car=52877Comment
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