Ok, I just got my apex-i EGT. I have searched and read, install probe on #3. Ok, so how do I drill through that manifold? Will an electric hand drill do the job? My drill has enough trouble drilling through the bumper support to mount my intercooler.

Also, doesnt this 2 inch long probe create sort of a blockade in the exhaust gasses?

Which direction should the probe go? The thing is so damn long.

THanks for the help.

 

you have to get the right kind of drill bits, first, my cordless would do the job, a 12volt, but I had the wrong dril bits, ended up bending them.

 

what kind of bits do I need to buy?

 

I am guessing some sort of carbide tipped bit. Something that is for drilling strong metal. A wood drill isn't going to work.

I would like to know exactly what to use, I am in the same boat as intekragsr.

 

If you are not used to drilling and tapping stuff, i would take it to a shop. I got a local engineering company to do mine, and all they wanted was a box of biscuits for doing it.

I had to fit my autometer probe parallel with the manifold as the thing was too long also, don't know how this affects the readings but i couldn't think of anywhere else to put it (greddy manifold).

[IMG] http://www.marklamond.co.uk/crx-si/t...s/fitting8.jpg [/IMG]

You can see the fitting on the right hand side. This is probably a really crappy place to put the probe, but i was stuck.

 

i think I will do that. I have no idea where to find an engineering shop. What do I look under in the phone book. I really appreciate your replys and help.

 

Some people prefer to drill and tap a hole in the downpipe flange, where it corresponds to the small (~ 3/4") hole in the turbine housing. The hole is there to bleed exhaust gases using an internal wastegate flapper, but since you have a DRAG 3 with external gate, it just gets capped off by the DP flange. The benefit of doing it this way is the probe reads the average of all cylinders instead of just one.
Don't know how powerful your hand drill is, but it's pretty easy on any drill press...

 

yeah i would drill and tap the flange on the downpipe, thats where i have it, works good....i dunno if i would drill the mani

 

heh I think that might be what we call a machine shop. Any machine shop will do it for you, and they will do it right - don't go at it with a hand drill. You cannot really properly drill through metal like that with a hand drill

expect to pay $25 or less

 

I got mine done at a machine shop and paid like 15 bucks. I had mine drilled in the manifold right in the middle where all the collectors meet, not sure how good of a place that is, but I figured that I would get an average on all the cylinders.

 

To obtain an accurate reading, it is advised to install the probe as close to the head as possible on the #3 exhaust manifold port. However, one thing that could screw you over BIGTIME is if the probe were to break, then your turbo will eat the probe for lunch and will ruin your turbo. I decided to install my probe on my downpipe right where it is bolted onto the exhaust housing of the turbo. This is also accurate as as well as precise, some people say the closer the better, but i would rather be off by maybe a few degrees then have the probe break off and ruin my turbo. If you do decide to install the probe before your turbo, then be VERY careful not to have metal shavings get into your manifold because they will get into your turbo and mess the exhaust wheel up. To install the probe, drill the appropriate size hole with a metal drill bit. Then you have to thread the hole so that you can screw in the probe. And that is all there is to it This picture should give you some insight for a nice safe place to install the probe, this is not my car, it is shawn sexton's.




[Modified by GudeH23a, 1:40 AM 4/23/2002]

 

 

i just did mine today. hand drill works just fine, and i used a regular metal drilling bit. it walked alot at first, but once it gets a bite it goes in smooth.

 

Just dont forget the oil when drilling.

 

uh oh.......oil for what.....did i miss something?

 

You can spray oil or any type of lubrication to cool the drill bit down while drilling. Also, please drill with the manifold off of the engine and not attached to the turbo. It's just extra security. You don't want shavings in the engine. After you're done, spray down the inside of the intercooler with some type of cleaner, and spray the rest with compressed air to dry it out. I would just use brake cleaner.


[Modified by iloveracing, 10:45 AM 7/4/2002]

 

In this pic, Is the EGT drilled into #1 exhaust port? If I'm correct, you start counting from the timing belt side over to the transmission side, 1, 2, 3, 4.

If it were me, I would go ahead and drill a hole right where the downpipe bolts on to the turbine housing. Like someone already said, it's just extra security for being off a couple degrees. Granted, those probes are pretty strong and won't break that easily. But whatever you feel is necessary.

 

Just keep putting small drops of oil on the spot that you are going to drill to keep the bit cool. Theres a lot of friction going on.

 

The guys at Road Race Engineering drill the manifold with the thee car runnig so that the metal shavings get blown out while you drill. I figure I would give that a shot.

 

Do they do this with the dp off? If they don't, the shavings would get stuck in the cat(if you're running one).

 

I hope the turbo is unbolted while they do this.

 

Hehe, that's my pic. I put the egt probe there because it was too long to fit it anywhere else. It seems to handle the heat fine when i pulled it out to check a while ago, it just had some carbon dust on it. My egt when cruising is 1400f, at 70mph.

 

On my drag manifold i drilled a hole in the area around the flange and had it go into the #3 runner right around where the collector is. The probe was kinda long but autometer supplied a bung that I had welded on. I'll go take a picture real quick and see if I can post it.

 

Ok...sorry about the shitty quality on these but I couldn't get a good angle to take a picture because its so crowded in there but these might give you an idea.