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Originally Posted by mike2016
You can buy the Defi EGT sensor seperately, Defi provides it as a repair part and we have it available.
usually you should install the EGT on the No.2 or No.3 Runner, since these 2 are the hottest.
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depends, if u are not using a stand alone computer to individually trim cylinders, id go with it on the exhaust knuckle.
if u are standalone and can spend the cash on a new egt every month than by all means tap 1 in each runner.
1 tubular manifolds after a mountain run are cherry red, shizz even after a dyno run they are glowing. tapping into a tubular manifold will shorten your egt probe life by alot. too much heat and turbulance.
2 basically most ppl here probe a runner and the exhaust knuckjle. take a baseline for about 1400 degrees at the runner and see corresponding temp at knuckle. that way u plug runner up and use knuckle temp to tune/data record. think its about 1280-1340 to attain 1450 at the runner or something. this depends alot on runner design and turbo efficienceys.
personally ive seen way too many cracked manifolds to ever chance tapping into a tubular manifold. drag teams do it, but they dont have to drive the car when it blows something. also if u mean tap as in puncture and run the probe band instead of welding a bung on, do it after turbo, u will lose some ehaust pulse as if u had a small crack if u dont seal it good.