In a valant effort to show how utterly stupid I am I would like to ask the forum trolls :) where is all the heat coming from that ends up in the engine bay anyay? Yep probably the engine.
Ok more specific-- is it the the engine----is it the exhaust header---is it a combo of both--or is it secret infra red rays beamed at every rotory engine in the world from the other car manufactors?

Yall know I am drunk--right? :lol:

IF--most of the heat is coming from the header(As I suspect) or even if its just a good bit of heat from the header then why dont we have someone talanted(this excludes me) :dunce: to fabricate a heat shield for the !@#(*&^) thing.
Header wrap has been discussed somewhat I know with mixed feelings but what about a heat shield? Yall have seen the survival blankets things places like summit sales or maybe I can get GranMA to quilt one for us. :lach:
Thoughts before I sober up.
olddragger

lol Denny

haha, drunk threads make the weekend grand

haha, drunk threads make the weekend grand hehe, yay for drunk entertainment!

The heat is from the exhaust manifold and exhaust system. The engine is only going to heat up slightly above thermostat temp preset. That exhaust is the hottest I know of on a production car. I don't see why the Kevlar header wrap would not work to keep the engine compartment cooler. I was considering doing all the way back to the Y-Pipe. This would keep the underside of the car a bit cooler (and the cup holder).It's also suppose to help scavenge the exhaust down the pipe a bit better keeping the exhaust from cooling to soon and keeping the velocity of it up thus evacuating the exhaust faster and more efficiently. When I get the new exhaust system I think I will do that.

I bought header wrap for my RX7 and never put it on. I was told that it trapped moisture and caused corrosion. This may not be a problem on a street car which is run regularly.

it's mostly from the radiator/fan discharge

I bought header wrap for my RX7 and never put it on. I was told that it trapped moisture and caused corrosion. This may not be a problem on a street car which is run regularly.

I have heard of that also but I live in Arizona and we don't have humidity and when it does rain it is dry in an hour. I don't think I would worry about rust. Also the exhaust is Stainless Steel. Plus the temp this exhaust obtains would dry it out in a very short time(seconds) lol, if it could even get wet,,kinda like drops of water on red hot steel,water will just bounce off.
You could always paint the exhaust with High Heat Paint to seal it up.
I personaly won't worry about moisture.

It would be an interesting idea to fabricate headers with a seperate radiator... haha, ya right... or is that a stupid idea?

It would be an interesting idea to fabricate headers with a seperate radiator... haha, ya right... or is that a stupid idea?
That wouldn't work well. The heat in the header isn't the problem and is accually good. It's the fact that it radiates into the engine bay is what isn't desireable.

Dang---I spel better when I am Drunk:) :scratchhe

OK-- on the wraps --if anyone does that make sure you dont get too close to the o2 sensors--they get too hot and there goes your beer money.
I think I will take a roll of aluminum foil and isolate the header from the engine bay(short term) drive a little and just see what happens. Hell if that deosnt do anything then i just may leave it their and cook lunch on it. May as well get some use out of it. After that i will make a pyramid out of it and put it on my head to get egyptian rays to help with this moonshine hangover :beer05:
olddragger :bash:

it's mostly from the radiator/fan discharge


what we really need is one of these - I'm sure it will solve the problem.


http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=35

what we really need is one of these - I'm sure it will solve the problem.


http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=35


mmmmm i love asbestos

Can anyone explain how the side vents work? I dont see under the hood any place they hook to.

the side vents are for show.. they do nothing

no there is actually a little flow there. From the oil coolers back I think. BUT you mentioned one thing I am thinking about--making them more useful --shouldnt be hard to do? Team says the rad/fans give out a lot--probably very correct,--so shielding the exhaust header(with blanket not wrap) and making the side vents more functional in moving the heat out of the engine bay? Maybe some glowing red lights behind the side vents also that activate when you race your motor at the stop light? :ylsuper:
HMMMMMMM!

Maybe some glowing red lights behind the side vents also that activate when you race your motor at the stop light? :ylsuper:
HMMMMMMM!

PFfftttttttttttttttt!!! Thats so noob. You gotta go get a NOS kit and dont hook it to the motor. just shoot leet smoke out of the side vents!

Woohoo rain finally stopped.. for about 2min... anyways the side vents do work! and its not working off the oil coolers. I wanna try to cut those holes bigger/

http://i25.photobucket.com/albums/c58/tablets_/HPIM0085.jpg


and this is what i did to my oil coolers.

http://i25.photobucket.com/albums/c58/tablets_/HPIM0074.jpg

Search the !@#$ forum!!!!
http://www.rx8club.com/showthread.php?t=83423

Hehe, eh just kidden dude. But those pictures should be able to help you pinpoint *exactly* where the heat comes from.

And as for insulation. I have been dying to find an application for this: www.aspenaerogel.com . Best insulation around.

I can vouch that the header pipe insulation works!

At least on my '64 Stingray it does. I used to have vapor lock because of the underhood temps, and since I wrapped the headers there has been no further issues.

That was back in 1990, and still have the same headers, so I doubt the corrosion factor is an issue.

I had header wrap on a set of DC headers for about 2 years. I took it off to sell them and all the had was sort of a burn mark of cloth pattern, but other then that they were in great shape.

Trekk it looks like you have reversed the problem for oil screens.

Now your going to get rocks from the tires making a hole in the cooler.

Ever thought about putting a black plastic screen mesh on the inside of the well?

I'm so damn hot, my car feels it!

:p:

Trekk it looks like you have reversed the problem for oil screens.

Now your going to get rocks from the tires making a hole in the cooler.

Ever thought about putting a black plastic screen mesh on the inside of the well?


Rocks dont fly that way.. unless your going backwords.. Anyways, you might not see it all that well but those cuts are still under the plastic edge that pops out.
Even if a rock did manage to fly off it would hit the over hang.

And yes I plan on making a full screan back side soon.

what we really need is one of these - I'm sure it will solve the problem.


http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=35

I believe these guys also sell refrigerator heaters, keeps that cold refridgerator nice and warm.

why not a vented hood? nothing like the evo but a little more refind like BMW and some european cars

I would rather want the heat to go out the bottom of the car, then the manifold heat doesnt get to the intake to warm the intake up more.

A friend of mine told me of some other type wool blanket, it is called:
INSOWOOL - HP Blanket, it is a ceramic fiber wool that can handle more than 1400 deg celcius, its about an inch thick

Philip

My one friend who studied aerodynamics in engineering told me this.

The way to get a cooler / radiator to work at its best and the best aerodynamics at the same time is to have radiator or the oil cooler sealed of on the sides to create a channel (forcing the air through the radiator for cooling instead of creating swirls arounmd it) that makes a high pressure point just in front of the radiator. Then right behind it the air must be able to escape easy to create the low pressure that actually sucks the air through, then the cooling works much better.
the air must go through the radiator / instead of a bit past it, this create swirling action that disturbs the airflow a lot and pushes up the heat, less cooling.

A way to see the airflow on the car is, (this is a bit messy but it creates a windtunnel effect for cheap) take old oil, its cheaper and darker to see it better.
Now put it on the front of all panel, top to bottom or left to right at the hood.
Put a lot on.
Now go and drive the car as fast as possible for a long time.
When you stop you will see all the wavey streaks made by the oil and then you can also see how the airflow is at and past ducts if its working properly.
This sound stupid, but I used to race the 250cc GP bikes and we did that with mine, getting the flow and sealing perfect at the radiator---it ran very cool.
I will start to work on the oil cooler idea and give feedback some time


Philip

I want a vented hood, but noone makes it the way I'd like. If you run the car hard and park it you can feel lots of heat comming up from the left and right side of the engine cover near the shock towers.It would let alot of heat out and it wouldnt matter if water got in because nothing is really in those spots. I'd like to have vents in those spots only. I've seen one hood with those vents but it also has a ton other vents all over and I dont car to much for that.
Would also be nice to have a hood like a camaro and rams air in and down on the motor.
Most the hoods I see have vents over the airbox and engine cover. Unless you remove the cover heat isn't gonna go out that way so much.

I want a vented hood, but noone makes it the way I'd like. If you run the car hard and park it you can feel lots of heat comming up from the left and right side of the engine cover near the shock towers.It would let alot of heat out and it wouldnt matter if water got in because nothing is really in those spots. I'd like to have vents in those spots only. I've seen one hood with those vents but it also has a ton other vents all over and I dont car to much for that.
Would also be nice to have a hood like a camaro and rams air in and down on the motor.
Most the hoods I see have vents over the airbox and engine cover. Unless you remove the cover heat isn't gonna go out that way so much.

Agree, the hood that I would like should have 2 small vents on the sides, nothing too big or rice out, just to get the hot air out of the engine bay

Agree, the hood that I would like should have 2 small vents on the sides, nothing too big or rice out, just to get the hot air out of the engine bay

I would also go for this. Basically something that looks factory, very subtle and functional.

I think these would look very nice on both sides of the car.

http://i25.photobucket.com/albums/c58/tablets_/hoodvents.jpg

I would have the hood cut and put these in, but they are in the 7"x17-20" area so the might be way to long. 4"x8" would look really nice.

what we really need is one of these - I'm sure it will solve the problem.

http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=35
Heat doesn't worry me as much as braking performance. I really like their cross-drilled brakes lines.
http://kalecoauto.com/index.php?main_page=product_info&cPath=1&products_id=1