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CptActnMan
12-20-2008, 07:18 AM
how hot would you say it is in there?? i know its enuff to destroy my wiring. ....trying to pick out new wire for a new harness. what do you think?

MrWOT
12-20-2008, 08:11 AM
Hot enough. I put about 2" worth of washers and longer bolts in the back of the hood on my 165 to vent it, looked pretty ghetto, but quite effective. Lets just say I was the only one on my block to have one :laugh:

quark
12-20-2008, 08:14 AM
You can just remove the rubberline on the firewall.. :-D That will make the temp go down quite a bit.

ciento44
12-20-2008, 08:47 PM
Hot enough. I put about 2" worth of washers and longer bolts in the back of the hood on my 165 to vent it, looked pretty ghetto, but quite effective. Lets just say I was the only one on my block to have one :laugh:


JDM hood vent!

I'm doing this.

CptActnMan
12-20-2008, 09:10 PM
let me re-phrase the question, i want to order wire, for my engine harness, from a range of max temps. 60c - 200c / 140f - 392f.

if i look harder i can find higher, but lets start here.

my current harness is destroyed, already. and i am fab-ing a new one. but i want it to withstand the heat under the hood.

CptActnMan
12-20-2008, 09:11 PM
JDM hood vent!

I'm doing this.

as will i the st165 looks pretty BA with a vent!

GT4SOM
12-20-2008, 09:34 PM
How is it that hot to destroy your harness?

CptActnMan
12-20-2008, 09:59 PM
just exposure to heat for ~20 years. all the wire is dry and brittle, all the copper is corroded and generally not working very well at all.

http://newunitedracetech.com/images/web%20stuff/dsc01329.jpg

MrWOT
12-20-2008, 10:18 PM
Yeah, the wiring in my 165 was like that and worse :ugh: That what you get from 20 years of HOT underhood temps.... Glad you're just going to yank the whole thing at once though. I patched mine up as it went out until the EMS went in and it would have been so much easier to replace it from the start.

edit:

ps. you should have seen what happened when I upgraded all the grounds. :eek:

on another sidenote, the ma70 suffers from the same thing, and i solved it the same way :laugh: ghetto cowl ftw ;)

T-spoon
12-20-2008, 10:37 PM
on another sidenote, the ma70 suffers from the same thing, and i solved it the same way :laugh: ghetto cowl ftw ;)
Heh, I should have done that.. Oh the heat issues I had in Houston...

wizzards581
12-21-2008, 05:05 AM
yea.. after 20 yrs... unless u plan to keep it for 20 yrs...

RedRkt01
12-21-2008, 06:57 AM
what if he is?

CptActnMan
12-21-2008, 07:06 AM
lets hope, but mostly i would like to compete with this chassis. so a bullet proof harness is paramount to me.

RedRkt01
12-21-2008, 07:29 AM
I've an '88 ST165 as well and I do want to keep mine 20 years. I'm giong to compete with it to boot. So yeah, I hear ya on that.

CptActnMan
12-21-2008, 07:46 AM
so what do you think? lets even say an educated guess.

the thermostat runs at 180f, so maybe 250f

100' spool of 200f = $117.23
100' spool of 300f = $170.00
100' spool of 400f = $176.73

ciento44
12-21-2008, 07:47 PM
I'd just go ahead and err on the side of caution.

I'm not sure that i would trust 200f. And 400f is really no more than 300f.

CptActnMan
12-21-2008, 08:23 PM
OK how about this tidbit, cast iron starts to glow a faint deep red @ 900f.

i got it, 400f with nomex sleeve. Toyota did it for part of the harness (near turbo) and it will be fire retardant

wizzards581
12-22-2008, 08:20 PM
if i were in ur situation, i'd go wireless :bigthumbu

RedRkt01
12-22-2008, 08:37 PM
I'd use a superconducter wrapped in a fire hose. I mean....why fuck around?

anachranerd
12-22-2008, 09:28 PM
Dude, go to gateway electronics. Ask the guy there for some teflon coated wire. It is rated for high temp. I believe 125c or higher.

Also, if you need help, I just did a custom harness. Ill be happy to help out..

Brian

anachranerd
12-22-2008, 09:29 PM
also make sure your wiring is routed AWAY from hot stuff like your exhaust mani...

Brian

CptActnMan
12-27-2008, 05:47 PM
Dude, go to gateway electronics. Ask the guy there for some teflon coated wire. It is rated for high temp. I believe 125c or higher.

Also, if you need help, I just did a custom harness. Ill be happy to help out..

Brian

125c ~ 250f was enough ? i guess that is the question to power this thread??

i prefer the silicone coated wire because its easier to mark and identify with sharpies. all so will be going with nickel plated copper to drastically reduce conductor corrosion. is the Teflon more durable or flexible.

CptActnMan
12-27-2008, 05:49 PM
also make sure your wiring is routed AWAY from hot stuff like your exhaust mani...

Brian


i have been thinking about a "re-route" some of the harness that run tween the head and intake manifold and the small run over the valve cover.