ABC'S of 80's Cooling Part IV - Hood Vents

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

alaskacruiser said:
SUMO- just to clear things up, you do plan to record pre and post modification engine temps in Part V because you are looking to control engine temps in Part V, correct?
Click to expand...

No, he DOES NOT plan to record pre and post modification engine temps in Part V. He wrote it quite clearly:

SUMOTOY said:
Rick, you will get your engine temps in Part V, when I go after electric fans with coolant sensor activation. I won't have any 'before data', but I suspect plenty here can supply that.
Click to expand...

Don't know how much clearer it could be. Though I don't doubt the answer will be something about hood vents not being put in for engine temp.
 
This is like a merry-go-round. So if you now replace the stock fan with electric, you change the complete flow characteristics of air comming through the radiator and our through the vents. So all the data in parts I-IV is no longer valid.

Would it not have made sense to put the electric fans in first?

Also, all this work to cool down the IAT temps. Have you take inlet temps for all the mods? Not just IR measurements of the box. Also what about pre and post supecharger temps. Isn't what comes out of the SC the most inporatant?

You proved you drop the air filter cannister temps, but have you measured post SC temps?

I say, stick a intercooler on that and get us some HP numbers :D
 
alaskacruiser said:
SUMO- just to clear things up, you do plan to record pre and post modification engine temps in Part V because you are looking to control engine temps in Part V, correct?
Click to expand...

I love it when a future mod takes on a present thread bruhaha! :D

I haven't sat down and done Post V, nor have I even been shipped the hardware for it yet. Here's where I sit coming into Post V as givens:
SC installed
hood vents installed
radiator shroud removed without wrenches (sumotoy - tm)
4 radiator fans with clipped blades
a radiator full of 50/50 green coolant
a 10in Aux Fan
a VC full of 10ksst fluid
a radiator with a lot of clipped cores.

What I *won't* do for Part V:
Buy more cst fluid and change it
Buy another radiator fan shroud
Buy another radiator fan
Take my hood vents out
Take my Supercharger out
change from 50/50 green coolant
buy a new radiator (yet)

So, the data in Part V will be compromised to the masses as I see the above issues. The data will include as much information as I feel is necessary to address the null hypothesies I present. I have committed dollars to take the *action* of changing over to dual electrics, as the guinea pig. The best hope I have is that I've followed experience and prior research, continuing to achieve the benefits of the ABC's path I've chosen.

I encourage everyone to wait for Part V, before attacking anything yet to be presented in Part V. Have a few :beer: and :popcorn: , the sharks are already in a feeding frenzy, even I feel the rush to ck the status of my hardware order!

:cheers:

SMT
 
sleeoffroad said:
This is like a merry-go-round. So if you now replace the stock fan with electric, you change the complete flow characteristics of air comming through the radiator and our through the vents. So all the data in parts I-IV is no longer valid.
Click to expand...

Quite possible Christo! In fact, I could end up finding that the aux fan is no longer needed. I don't consider that a bad thing, since I paid nothing for it.

Would it not have made sense to put the electric fans in first?
Click to expand...

Good point. I addressed I-IV by price. I already owned the aux fan and the hood vents. So, I only answer this by saying sure, it would make sense, but we've both done crazier things I'm sure. Worthy of many beers and laughs.

Also, all this work to cool down the IAT temps. Have you take inlet temps for all the mods? Not just IR measurements of the box. Also what about pre and post supecharger temps. Isn't what comes out of the SC the most inporatant?
Click to expand...

Well sure. And isn't compressor efficiency and mapping done assuming ambient pressure at the compressor inlet? If I increase the air density pre compressor closer to ambient, I have effectively increased compressor efficiency. All else equal, those with less negative pressure at the compressor inlet win track or dyno. BTDT. This may prove the biggest irrelevence to the non forced inducted guys. IAT's and Pressures could be much less signficant.

You proved you drop the air filter cannister temps, but have you measured post SC temps?
I say, stick a intercooler on that and get us some HP numbers :D
Click to expand...

Nope, I haven't gone after post charge air temps yet. Give me some time man! I'm getting closer to that part of the equation! Heat management of the SC? OK, but I'll go at that backwards too. I plan on installing a high flow exhaust first.

:cheers:

SJ
 
I'm just goIng to build a big cold can for my whole motor...:hillbilly:
 
cruiserdan said:
I'm just goIng to build a big cold can for my whole motor...:hillbilly:
Click to expand...
I think you should enclose the engine compt and hook up a couple compressors from a 60qt Engel freezer! :D
 
Update on the hood vents

Sitting in downtown stop n go traffic today, ambient temp 78, dew point 63, no a/c (no aux fan either) very calm day. I was watching for the heat ripples out of the vents I installed in post 1. For the what it's worth department, I could see the heat stack trail at least 3 feet over the hood vents on both sides.

Hardly SAE data, just an observation.

ST
94 FZJ80 Supercharged
 
SUMOTOY said:
I could see the heat stack trail at least 3 feet over the hood vents on both sides.

Hardly SAE data, just an observation.

ST
94 FZJ80 Supercharged
Click to expand...



Yeah, but can it cook Polish saussages?.............:D
 
I for one vote you just install a big liquid oxygen tank in the back, it is super cold in gas form and you can hose down the whole block with it and get a denser more oxygen enriched charge that way.
MAKE SURE YOU GET PRE INSTALL TEMPS!!!!
Or I will remove my endorsement from this mod.
Now back to your regularly schedule nitpick fest.
Dave
 
Intake Air Temps

Interesting...
In the FSM, it appears that us non OBDII boys have a IAT sensor as well. I suspect it's not quite as accurate as the OBDII, but it should be able to be tapped. It's inside the flapper AFM has a low value of
-4F and a a high value of 140F based on resistance.

Might be interesting to see what mods do what with these readings in the pre OBDII trucks as well.

Scott Justusson
 
Has anyone been able to identify the vents used? I compared pictures to Grand Prix and Land Rover vents and from what I have seen they are different than the ones used.
 
wearsabrowncoat said:
Has anyone been able to identify the vents used? I compared pictures to Grand Prix and Land Rover vents and from what I have seen they are different than the ones used.
Click to expand...

I'm pretty sure it's a LR Defender application, as someone pointed out in this thread somewhere. I still think the Z34 look the rats, but the install of the ones I have were just too darn quick and easy.

ST
 
Dont be afraid of the jig saw

Been installed for many months and running great!
DSCI1401.webp
 
Just wondering if you guys performing this mod (specifically SUMOTOY) did anything to prep the paint after the cut. Did you prime or clearcoat the bare edges or anything?

And now that you've had it on at least for a little while, any signs of rust or any additional thoughts?
 
NaterGator said:
Just wondering if you guys performing this mod (specifically SUMOTOY) did anything to prep the paint after the cut. Did you prime or clearcoat the bare edges or anything?

And now that you've had it on at least for a little while, any signs of rust or any additional thoughts?
Click to expand...

I did not prime anything, I cut and gobbed the cr*p out of the thing with silicone. I've done this mod a half dozen times on my own cars/trucks over the years, never had a problem with rust using silicone around the cut.

I did this mod last year, and I'm quite pleased with it, especially with the Supercharger, the heat out of these vents is more than I expected. At 10 degrees this morning, you could see the heat ripples rise quite easily.

You can knock around in the thread regarding "measured" benefits, I'm a big fan of hood vents in general, and the 80 took to it as well as any of my turbo cars did. The truck doesn't appear to take any longer to heat up vs without the vents, but I've been too lazy to cover them up for a winter comparison. No question in terms of looks, Citadel's use of the Z34 still makes me drool. I just went for 10 minutes in function, but appreciate the art of those Z34 installed.

HTH

ST
 
treerootCO said:
Thought I should add a link to the hood louver thread to the hood louver thread.
https://forum.ih8mud.com/80-series-tech/238896-hood-louvers-retro-fzj80.html
Click to expand...

Hey that reminds me, didn't we task you to finding out formally if he'll do our other hoods? :D:D:D

Well? I can drop my hood off whenever he wants and I can wait as much as he wants (within reasonable reason) for the finished product. Ohh, I wouldn't be this impatient if you didn't remind me of what I was forgetting! :D :flipoff2: :D

This is just so much better than hacking a hood up and "goobering it with some silicone" you on the other hand took the "ABC's/101's" of this thread to the doctorate level and really did it right! :cheers:
 
You must log in or register to reply here.

Similar threads

TXMeatball
AC cooling woes
Replies
15
Views
1K
Gascan
Gascan
8
80 series coolant related clamps and hose part information
Replies
4
Views
685
Kernal
K
Herrett
Sourcing & shipping hood insulation
Replies
8
Views
811
Herrett
Herrett
FIDO96
Hood rise while driving
Replies
13
Views
895
FIDO96
FIDO96

Users who are viewing this thread

Total: 1 (members: 0, guests: 1)

Share this page

Back
Top Bottom