Guest Enzo Posted October 22, 2007 Share Posted October 22, 2007 ive started my build on the ep and im looking to by an acurate af gauge and egt gauge, do any of you guys know who makes good brands for them as i dont know where to start looking.also would i need an extra bung in my downpipe for the egt gauge aswell as another for my a/f??thanx in advance if anyone can help me out Quote Link to post Share on other sites
RobSR Posted October 23, 2007 Share Posted October 23, 2007 I would say anything like GReddy, HKS, Defi, i would defo. go with one of the big names IMOAEM also make very good a/f ones aswell....As for a/f i would definately go with the AEM, seen them in action, very nice and accurate....GReddy EGTHKS EGTDefi EGTRob Quote Link to post Share on other sites
Guest Enzo Posted October 23, 2007 Share Posted October 23, 2007 thats been an abundance of help thanx for that rob i really apreaceate it,i just have one more question for anyone that might know out there,when i get these two gauges should i need a bung in the decat for both of them aswell aas the lambda sensor?? Quote Link to post Share on other sites
RobSR Posted October 23, 2007 Share Posted October 23, 2007 the aem a/f gauge comes with a bosch sensor, (which you can see in the picture also) so i imagine you will use that one, none other.....as for the egt....i think quite alot of people plumb them directly into the manifold before the turbo, so its more accurate ?!?! Im sure someone more in the know can confimr/correct this.Rob Quote Link to post Share on other sites
Glanza_Ragger Posted October 23, 2007 Share Posted October 23, 2007 the aem a/f gauge comes with a bosch sensor, (which you can see in the picture also) so i imagine you will use that one, none other.....as for the egt....i think quite alot of people plumb them directly into the manifold before the turbo, so its more accurate ?!?! Im sure someone more in the know can confimr/correct this.RobEgt temp gauges usually go into the manifold cone.Where all the runners join on the square ct9 adaptor flange...A/F should go at least a foot away from the turbo downstream..Allthough i have fitted mine in the decat inplace of the cat overheat sensor (lowest)So you will end up having a sensor in the manifold cone for the egt.sensor at the top of the downpipe like usual for the stock lambda sensor..and a sensor at the bottom of the downpipe next to the flange or slightly further back.I'm running an AEM wideband uego gauge.Dead accurate and uber fast response.I would either go for aem, or innovate...Innovate youre just paying for the name really.Both have datalogging capabilities..both are super accurate and both run on a bosch sensor which should last many years as long as its not in the route of moisture,oil ect.As for egt, either AEM, greddy,defi,sard etc... they all do the same job...I just prefer digital gauges because most of the time there more accurate readings and easier to read on the fly...I used my mates aem egt when i was setting my pfc up. I still need to purchase one when my forged engine is finished and i can waste some more cash Quote Link to post Share on other sites
Guest Enzo Posted October 23, 2007 Share Posted October 23, 2007 thanx for the clear and consice information bud, im picking up a milled steal mani tomorrow,so am i right in saying that il need to tap that somehow for the egt gauge?will that weeken it in any way? Quote Link to post Share on other sites
Glanza_Ragger Posted October 24, 2007 Share Posted October 24, 2007 Tap it on the runned for cylinder 1. Thats what i was told. And if you look at the cruise manifold keith is selling, its on the 1st cylinder aswell. Dont really see hw you would need both wideband + egt though? Some manifolds come with a bung in runner #1..Some people prefer to take the reading from the cone where the runners join.This is copy'ed from a site i found, as i cant be assed to explain it in my own words, too ill and need sleep EGT Gauges ExplainedAn Exhaust GasTemperature (EGT) gauge is a great compliment to an air fuel ratio (AFR) gauge. Some folk tune cars based just on EGT and some just on AFR but combining both measurements is a much better way to tune.EGT is used for tuning and also as a warning indicator. The EGT suggests whether the AFR is relatively rich or lean. This information is most useful during wide open throttle (WOT) engine operation. At WOT, values between 850ºC (1562ºF) and 900ºC (1652ºF) are often considered ideal; temperatures below 800ºC (1472ºF) are considered too rich; temperatures above 925ºC (1697ºF) and approaching 1000ºC (1832ºF) are considered dangerously lean and can result in excessive engine detonation (knock) and possibly burnt or melted components (valves, spark plugs, pistons, rings).The placement of the EGT probe affects the measurement (the further the probe is from the head exhaust port the cooler the temperature can be) as does the amount of ignition timing advance (more advance can mean cooler temperatures). To get useful temperatures, the probe must be installed in the exhaust manifold (and if on a turbo car before the turbocharger). Most people install the probe near where the individual exhaust manifold branches have joined and the temperatures from each cylinder have combined.Of course, EGT measurements will vary from car to car and also depend on probe placement. Once you have installed a Dynotune digital EGT gauge on your particular car and used it in conjunction with an AFR gauge you will soon be able to develop an 'EGT signature' of your particular vehicle and be able to tell just whats going on with your engine based on the two gauges!As for the probe fitment, wether you decide to weld the lug in the runner#1 or the cone.. it shouldnt weaken it if its wedled properly..Just make sure its all nice and smooth inside after its been welded.get a dremel inside to smooth off any rough bits of weld. Quote Link to post Share on other sites
StarletRick Posted October 24, 2007 Share Posted October 24, 2007 geo, i have a defi egt gauge, i like it, takes about 5 mins to get going, but they all take a while to 'warm up' (no pun intended) and as for AFR. i have the NGK one, its a bit bulky, but i know youre one for function not looks. it works well and only needs calibrating about once a month and it only takes 5 mins. hit me up on msn if you want to chat about it matey. Quote Link to post Share on other sites
Glanza_Ragger Posted October 25, 2007 Share Posted October 25, 2007 geo, i have a defi egt gauge, i like it, takes about 5 mins to get going, but they all take a while to 'warm up' (no pun intended) and as for AFR. i have the NGK one, its a bit bulky, but i know youre one for function not looks. it works well and only needs calibrating about once a month and it only takes 5 mins. hit me up on msn if you want to chat about it matey.I was looking at the NGK items, sposed to be quite accurate units..I opted for an AEM as its self calibrating.Saves me a bit of hassle having to remember to check it now and again..Im lazy like that Quote Link to post Share on other sites
Bean Posted October 25, 2007 Share Posted October 25, 2007 wheres the cheapest place to get the AEM wideband with sensor? Quote Link to post Share on other sites
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