towsey956

Well-Known Member

• May 16, 2016

• #1

hi all

I've searched for an answer but got sick of looking before I found what I was looking for

I've got my self an egt gauge for my disco because I've been having a bit of a play around with things and I don't want to go too far, but my question is what is a known or recommended safe max temp for the 300 please?

Any advice gratefully received

Towsey

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #2

I was told that the max temp for the Ali head on a 300 is 720 degrees C. But as we are not measuring the temp of the head, but rather the EGT, I limit myself to 600. I find that this, even in a fairly high state of tune takes some getting to - only leathering it up long steep hills.

As you will see if you watch the gauge, the temp keeps rising for a short time after you have reduced the throttle, so you might like to bear this in mind - so, IOW, approaching 550, its time to slow down a bit.....

You might also like to make absolutely sure your alternator heat shield is in place, and in good condition. Ask me how I know this.

 

towsey956

Well-Known Member

• May 16, 2016

• #3

Thanks for that, just the sort of info I was after

Heat shield hmm can't remember if there is one, but there soon will be

Thanks

Towsey

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #4

if you space it out from the alternator, to get some more airflow, you might find this advantageous, I used studding couplers - I will try to post a pic later. Don't forget the other heat shield at the rear of the inlet plenum too !!

Plenty of smoke inside a Disco, which a very hot engine might want to let out....

 

towsey956

Well-Known Member

• May 16, 2016

• #5

Good plan cheers. The one at the rear is defo there ta. I always think there's quite a bit of heat under the bonnet but it was like this at standard power, I've taken the fan off tho and keep it in the back but I can't remember how warm it got under there with it on. I might re fit it now tho and get some more flow back under there

Thanks

Towsey

 

towsey956

Well-Known Member

• May 16, 2016

• #6

Disco1BFG...Are ya there

There's no heat shield on the alternator that I can see, apart from a silver insulated sleeve around the wires! If it's not too much trouble would you be able to dig a pic out of yours please. I'd put a pic of mine up but I've no idea how to do such things ha

Thanks

Towsey

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #7

I'm here.... I'll get a pic up in a bit....its this work, you know, it gets in the blinking way!

 

towsey956

Well-Known Member

• May 16, 2016

• #8

Haha, I'm hearing ya.....thank you

Towsey

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #9

Just waiting for the server to get it from me phone to the laptop.... (yawn ).......

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #10

ere it is !!!' !

(flippin technology )

Hope it helps....

 

towsey956

Well-Known Member

• May 16, 2016

• #11

Ey have I done it right? (If ya can see it then it will be a poo photo, it's gettin dark out there)

Yeah that's a nice new lookin piece of kit there mate, with a nice lookin heat shield aswell. Rite I need to be on to that

Cheers

Towsey

 

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Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #12

Aye, you did that right. Alternator Heat shields are on the bay of fleas...ERR4859 - Plenum heat shield ESR2422

As for new, it ain't new - I just look after it (!!), sad, I know, but i intend it lasting me out. not interested in modern 'lectronical s**t.

 

towsey956

Well-Known Member

• May 16, 2016

• #13

Ooof, think il make one instead, thems dear for wot they are, cheaper than an alternator but still dear

Well at least I got the pic up ok, and your absolutely right to be like that!

Where your egt display mounted by the way

Cheers

Towsey

 

Disco1BFG

Well-Known Member

Full Member

• May 16, 2016

• #14

towsey956 said:

Ooof, think il make one instead, thems dear for wot they are, cheaper than an alternator but still dear

Well at least I got the pic up ok, and your absolutely right to be like that!

Where your egt display mounted by the way

Cheers

Towsey

Click to expand...

IMHO, cheaper than my time to make a dual layer shield worth having. Tis your alternator tho...

My EGT gauge is mounted in a pod on the top of the dash with a boost gauge and transmission oil temp. Pod was about £8 off the bay. ( there's a pic on here somwhere )