NRL

Talking about the square one in the middle, ignition transformer.
How hot does yours get?

Weird how even swapping a new one in, still quite hot and seems to take forever for it to cool down with the hood open, since it's close the V of the engine..absorbing heat..

Want to isolate it near the bolts and add a heat shrink but I'm not sure if a heat shrink with a small fan will be ok.

radride

Is it possible to extend the harness and maybe move it by the fuse box behind the motor?

R.K.

NRL

I don't think the harness is long enough. I'll check it out.
Is it supposed to get hot, but how hot, I'd like to find out.

What's curious is, it's still hotter then anything when the engine is off for a while, intercooler, etc.. is it absorbing heat from the rail it sits on? or does it just need to get that hot to cool off.

lookin for my RF Temp gun, gonna measure it up.

cjcalo

Here's what I found with the Fluke IR temp gun after immediately after a 1/2 hour drive. Ambient temp was 66 degrees.

IC temps about 76 degrees
Ignition transformer temps about 110-112

My ic temps stay around that temp for at least 5 mins after shut down. But I didn't time them for when they start to heat up. With the hood open the transformer temps drop to 95-100 pretty fast and from there they slowly cool down. I did notice that with the engine covers on things were much hotter. But I haven't had them on since the first few days I got the car so this test was done without them on. Hope that helps

Edit: And since we're talking about statistics I'll share some other findings from about a month ago. My mods are speedriven ecu/tcu and johnson cm30 ic pump everything else is stock. Last night it was 62 degrees ambient and while cruising 70-75 mph I would see anywhere from 84-95 intake air temps while most of the time it would stay around the 91 area. When I came to a stop iat would be from 115-130 depending on how long I was stopped but as soon as I moved the iat's would start dropping instantly. It sure gets hot fast while stopped I would hate to see what the iat's would be if I was stopped in 100 degree weather. I would guess that it would be completely heat soaked. I heard that heat soak is 159 degrees? I didn't get a chance to log them during a pull because I get coil pack misfires at wot.

NRL

Thanks, I'll measure mine tomorrow and report up. Having a blast driving around after putting it back together (coil packs and spark plug). It's like a new car.

I guess the transformer gets hot naturally, and needs to radiate as it does and not mainly from engine heat soak..

Did you mod your ic pump to run continuously? I want to do that mod next.. And or get a new pump.

driveability

I noticed the same thing ! I am going to move mine. I think in front of the radiator sounds good. I trust the guys from AMG for sure but since I'm an auto electrical specialist the wiring quality will be as good as factory. I don't mind being a ginney pig I'll surely share my findings.

cjcalo

I thought that the pump runs as long as the ignition is on? When I key on the ignition it activates the relay to the pump. I just spliced in the johnson pump to the original pump wires.

I have no idea why they would put the transformer there. Most other cars don't put their igniters on top of the engine they are usually on the fender well or somewhere away from the engine. Heat can't be good for it. If you make a plug in harness extension for the transformer I'm sure a lot of people would be interested in buying them from you. Please keep us posted.

driveability

Since I have converted my small secondary radiator to the IC system and set up the fan to turn on when the IC pump does ( the pump up dated unit, turns on at a temp set up by AMG and at this point i don't what that is). I've decided to mount the module in front of that small radiator inside the shroud so it get a good breeze when its needed most. I really think cooling it after shut down would be best but I don't have a timer handy. I do think the engine acts as a heat sink for the module, sounds nuts but it does get hotter than the surrounding areas. here is a picture of my IC reservoir

driveability

I have decided to run it in front of the radiator for now. The unit so far hasn't created much heat at all by it self. There was a lot of soldering done but at least I know the connections are good. I also used a wire one gauge thicker so as to help handle the extra span. I just have a problem leaving anything alone

NRL

Very Nice!

Let us know where your gonna mount or did mount it..

Did you cut and solder extend it?

So, it doesn't get hot by itself as much? I thought it got hot by itself, need to confirm that, which means it's picking up heat from somewhere, that rail brace where it mounts too.


also, very nice on the intercooler coolant split.. So the intercoolers uses that other smaller reservoir?

driveability

The intercoolers use the smaller one and use the secondary radiator mounted in the passenger side fender well connected to the original factory IC in front of the radiator. Here is a pic of where I have the unit mounted.
again, the transformer doesn't get hot alone at all, the heat came from the engine so maybe it could have been left there in the first place. At this point I can't make a determination. I'll leave it there for now, I may move it away from the air flow to other coolers as it again doesn't seem to make much or any of its own heat.

NRL

Nice!

You should do a DIY writeup on spliting the coolant intercooler mod for the V12TT.. I plan on doing that mod.

So it still might be possible to isolate the transformer by some kind heat resistive washers, grommets or something at where it sits..

I saw someone on the forum with a pic who did that but I can't find it or figured out what he used to isolate the heat in place..

But your method of relocating it is probably the best yet.

driveability

5174970]Nice!

You should do a DIY writeup on spliting the coolant intercooler mod for the V12TT.. I plan on doing that mod.

So it still might be possible to isolate the transformer by some kind heat resistive washers, grommets or something at where it sits..

I saw someone on the forum with a pic who did that but I can't find it or figured out what he used to isolate the heat in place..

But your method of relocating it is probably the best yet.[/quote]



Below is a link to a picture( wouldn't post direct for some reason) where I just installed 4 rubber isolators,(metric) from a junk car a friend had. the unit still got real hot so I spliced (soldered) the 10 wires to a longer string. ****The unit itself seems to make very little heat on its own.**** So moving it into the air flow may not be necessary. Anywhere away from the heat my guess is fine. Here it stays cold but could be damaged by rain or snow. Something to keep in mind.

http://imageshack.us/photo/my-images/29/dscn2892a.jpg/

cjcalo

hmmm since it doesn't create much heat by itself I may try some heat shield underneath it to see if that helps.

stockC43

Just curious why you are doing this? The metal hosing voltage converters very rarely fail. The plastic topped ones are more prone to failing. Don't you think the extra exposure to rain/water would cause it to fail sooner from corrosion? All this box is is a step up voltage converter for the coils, it's not the control module

NRL

I was going to do that also with the DEI heat shield stuff.

I think the heat is being transferred from the mount points. I'm not 100% sure.

Need a neat way to isolate it.

driveability

all good points,sometimes I just get bored. Maybe a better explanation is often I just think of something and can't help myself I am used to building cars, doing conversions withing conversions. Locating it somewhere less exposed is a good idea, maybe the head light fender well area.

nola_penguin

Depends if I buy it dinner first...

1995E320Cab

Bored, creative ? One of the biggest issues we have is keeping our V12TT cool so .......

How about doing a Brabus style quad IC set up ? While your at it make a kit so the rest of us can do it also !

Or

Why not make up some fresh air intake kits ?

I'm sure others would be interested in these also.

NRL

See if you could McGyver one of this either in the front intake or just before the intercooler:

http://www.designengineering.com/cat...yo2-air-intake
It chills the intake further..

That should cool down the intercooler along with the split coolant install..