Quick question for you all with FI. I've searched through the site and haven't really found anyone running EGT gauges. I've been doing research and found that for optimal readings the header/manifold must be tapped if there isn't a preexisting hole. But after a while particles/shavings from the probe might burn off and go through the turbo causing damages. But one could also tap after the turbo on the downpipe or preexisting hole and install the probe there. But temperatures will be 200+ degrees less than accurate.

Just wondering if you FI guys are running these and if so, where did you put your probe. Also, not sure if it is absolutely needed. But have a Defi Link Sytem with a VSDX and two BFs and could run just an EGT sensor when ready. Any help would be appreciated. If this was already answered, sorry I searched and found nothing...

 

IIRC I put my EGT sensor at the top of the APS 3.5 test pipe(where it bolts up to the turbo).

 

at the top of the test pipes...

 

thanks. I appreciate the feedback.

 

What they said.....

 

+1 as far up the test pipe as possible

 

I drilled and tapped the exhaust manifold right before the turbos, this was all done when the built engine was out of the car.

 

This is the proper way to do it. You will get the most accurate reading of whats really going on in there!

 

Yeah. Much easier for you that way. My powerlab kit should be on the way which I don't have to pull out the engine. So maybe the pipe after the turbo.

 

Closer to cylinder will get the most accurate reading.

chefj

 

Can that be done without removing the exhaust manifold?

 

To drill an tap would be next to impossible with the motor in the car...Probably not a good idea.

 

+1, I would remove and do it too. So that way i can clean inside the manifold after drill.

Btw, you can just tap it on after turbo, like other members did.

chefj

 

Thanks. I'd rather tap after the turbo.

 

then why bother? the distance from the manifold plus the fact that the turbo acts as a buffer for the heat changes, means its pretty much worthless. You need it in the manifold to get good reaction time and temp readings.

 

Been a while since I've installed one, but as I recall: search around the net and see if there is a cyl. that burns hotter than the other 5. Cyl 1 on a DSM's 4G63 (I have no clue on a VQ35). This will be the runner you want to install the gauge on. Only other thing to consider is that you want to be between 2"-6" away from the base of the manifold for the most accurate reading. Test pipe location is too far for an accurate reading in my opinion. Good luck.

 

How about instead of tapping something like this can be used so you don't damage the manifold

http://www.glowshiftdirect.com/egt-bracket.aspx

 

??? Doesn't the probe still have to be inserted?

 

yea it does, wtf is that clamp?

 

yes probe still has to be in the exhaust stream. Those clamps were made for thin wall tubing that would normally not have enough material to properly thread. of course the real solution there is to weld an actual bung to the manifold.