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Author Topic: Underhood temps are RIDICULOUS!  (Read 833 times)

AJ

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Underhood temps are RIDICULOUS!
« on: July 27, 2009, 03:09:50 PM »





 
OK - So now that a lot of my heep is back together, working properly and most everything is good I have to get back to the motor...
 
I have a very bad under hood temp issue...I don't know what the temp is under the hood but my carb is just about always very very warm and on hot days the carb is just about HOT to the touch...the air cleaner even was!
 
I put on a 1" carb spacer to see if it would help...it did but not enough.  The carb itself still gets pretty damn warm.
 
I put some large custom fender vents in also which makes a HUGE difference because all the heat was getting trapped in the corners of the inner fenders with nowhere to go...
 
Now...the temp gauge reads perfectly fine but i know i am having a heat issue because i go thru a lot of fuel pretty quick...the fuel was even evaporating in the filter...
 
I have an AMC360 in my CJ with about 300hp and 350tq...360s were never in CJ7s - hell no V8 CJ7s were even made in the US last year of a V8 CJ was 83 which had a 304 in it...lots less heat I am sure.
 
I have considered modifying my hood and give it a cowl induction style hood so it can bring cool air into the motor along with additional vents in the front 'corners' of the hood so that when in motion it circulates the air.  I was going to run louvers but no one close enough can punch them out and at $1.50-$3.00\\louver that is way too steep for me (more than a few would be needed, methinks).
 
Please help...you guys have been dealing with this stuff for a lot longer than I have.
 
EVERYONES WISDOM IS WELCOMED!  I don't care how crazy of an idea it sounds like - I would love to hear it!  BTW - Fuel line was custom bent by me and is more out of the way of the engine than it was from the factory.
 
THANKS IN ADVANCE!
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Stan Paralikis

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Underhood temps are RIDICULOUS!
« Reply #1 on: July 27, 2009, 04:06:22 PM »


 
You gotta give the hot engine air a way to escape:
 

Commando12009-07-27 21:08:18

AJ

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Underhood temps are RIDICULOUS!
« Reply #2 on: July 27, 2009, 04:52:39 PM »

That's pretty much what i was thinking...
 
Except follow the natural body line of the CJ hood but not making it quite that tall...
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Steve

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Underhood temps are RIDICULOUS!
« Reply #3 on: July 27, 2009, 07:45:43 PM »

Burn it  
 
Maybe a continous running Rad fan will do the trick.  Can you get one between the rad and the grill?  I forget the space there.
 
It would have to be full size for the rad, but you'd be changing more air in the compartment.
 
Come on man. . .Think 25+
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Jason Goldsack

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Underhood temps are RIDICULOUS!
« Reply #4 on: August 30, 2009, 04:53:01 AM »

Are you using a phenolic spacer or an aluminum spacer. The aluminum would transfer heat.

You should insulated the fuel line to the carb. I you can even run you fuel through a tranny cooler type rad to lower the fuel temperature to the carb. 

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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

AJ

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Underhood temps are RIDICULOUS!
« Reply #5 on: August 31, 2009, 04:09:23 AM »



You're funny, Steve...haha...I put in fender vents they are rather large and occupy just about all the possible space on the side of the fenders.  With a fan continuously running will not do much of anything except burn out the brushes\\bearings in the fan.  This happened to a buddy of mine running an electric fan.  I actually run the fan as a pusher and it fits snugly within the height of the core - wedged in even (fan is about 1/16" taller).
 
The fan is rated at around 2200CFM and I run an HD 3-Core Steel Tank radiator that is meant for a Grand Wagoneer.  I had to modify my Grille to accept it because it is bigger.  My truck weighs ~3500lbs the Waggy it was meant for weighs in at ~5,000lbs.  The temp gauge is NEVER in the danger zone.
 
The issue is engine compartment temps...the fender vents allow the release of hot air in the engine compartments 'heat trap' (bottom corners at the firewall where it would normally just swirl).
 
I think my issue is coming from my exhaust configuration as it wraps in front of the oil pan and then down the driver side.  I have it wrapped to limit the heat in the engine bay which also helped a good deal and it is also as far away from the oil pan as I could go without hitting my differential or drive shaft on suspension compression.  There has not been an exhaust system run this way on any of the AMC V8 vehicles AFAIK...maybe a fellow AMC'er can chime in on this? (*cough*Commando1*cough*)
 
---
 
I am running a 1" phenolic spacer...which helped a good amount. 
 
Something I noticed within the past two weeks is this - when it is decent whether (mid 80s with low humidity and lower) it runs fine and the heat issue is not an issue...when its above than and almost unbearable for us humanoids is when she tends to act up.
 
So...I know we're close...I am thinking the hood modification would be the best option for the purpose of heat evacuation.  Then later on I can add my own custom RAM-AIR to top it off - MMMM an extra 15hp or so for cruising would me nice.  Also calculated my MPG this weekend and it appears I am getting between 15-18MPG (waiting till the tank is empty to confirm my findings).  Of course, that is me driving it nicely - when I am 'on her' I can almost literally watch the gauge dropping - of course the feel of being planted pretty hard in the seat is NICE, though.
 
evulution2009-08-31 09:17:37
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Jason Goldsack

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Underhood temps are RIDICULOUS!
« Reply #6 on: August 31, 2009, 04:12:08 AM »

Maybe you could use a header wrap to help with the underhood temps.. it's a pain to install but lowers the temps quite a bit

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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

AJ

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Underhood temps are RIDICULOUS!
« Reply #7 on: August 31, 2009, 04:27:00 AM »

Quote from: 1965Windsor361
Maybe you could use a header wrap to help with the underhood temps.. it's a pain to install but lowers the temps quite a bit
 
evulution2009-08-31 09:27:31
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Jason Goldsack

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Underhood temps are RIDICULOUS!
« Reply #8 on: August 31, 2009, 05:37:43 AM »

It shouldn't be that bad... you just need to be patient since you have to pull the material through as you wrap.  It would be easy on a bench because you can wrap all the way around very easily.

Make sure you pull it VERY tight as you wrap.


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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

AJ

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Underhood temps are RIDICULOUS!
« Reply #9 on: August 31, 2009, 06:11:02 AM »

[/QUOTE]



 
Excellent...same way i did the pass head pipe...except not on the bench...itll be 'fun' I'm sure.  I think im gonna pull the fenders off so I can just sit on the tire and work :-P
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Jason Goldsack

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Underhood temps are RIDICULOUS!
« Reply #10 on: August 31, 2009, 08:30:44 AM »

That would be a good idea.. I cursed even wrapping the headers on my V-twin lawn mower racer..

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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

AJ

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Underhood temps are RIDICULOUS!
« Reply #11 on: August 31, 2009, 05:37:00 PM »

Quote from: 1965Windsor361
That would be a good idea.. I cursed even wrapping the headers on my V-twin lawn mower racer..


 

 
The headers are definitely going to get wrapped but due to low funds I will be holding off for now.  I have enough steel and welding wire to do the hood so I think I will do that next...even if it doesn't help it'll give some attitude at the least...
 
evulution2009-08-31 22:37:30
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Jason Goldsack

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Underhood temps are RIDICULOUS!
« Reply #12 on: September 01, 2009, 01:41:53 PM »

Hey.. don't knock the lawnmower racing until you tried it..

These were the fun ones to wrap.. 




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Jason

(Eileen)1965 Chrysler Windsor, 361/727/2.76 16.49 @ 86 mph

AJ

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Underhood temps are RIDICULOUS!
« Reply #13 on: September 01, 2009, 02:33:49 PM »

Not knocking the lawn mower racing...just laughing about how fun it is to wrap exhaust - even with the head pipe on the bench it was a PITA because of having to keep tension...

Tell you the truth I want to try it one of these days...probably a blast to get liquored up and race on a riding mower. :)  How hurt could you get?



 
Actually...how fast do those things go when they are setup for racing???
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1982 Jeep CJ7 :: AMC360 Edelbrock 4bbl :: TF999 Built :: Dana300 Twin Stick :: D30 \\ AMC20 :: 7" Lift :: 35" Xterrains on ARE 15x10s :: Plenty of Fab Work.  And stiil a DAMNED KID!

Rich

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Underhood temps are RIDICULOUS!
« Reply #14 on: September 01, 2009, 08:13:05 PM »

I have been told NOT to wrap headers because it will make them rust very quickly. TTI says not to wrap their headers either....

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