Heat management

[gs14racer]

So just wondering what you guys with VH swaps do for heat management.

After driving the car for 20 minutes, and i pop the hood the intake manifold is so hot i can even touch it. Although i know my intake mani is only about 4 mm from the hood anyways i still dont think it should be getting that hot

I did some experimintation today since my hood has been busted for the past two years, i decided to cut it up a little to see if vents would help since i had to purchase a new one anyway.

They did help a little before if i was in stop and go traffic i would water temps of 200-205, and cruising temps of 195-200, its about 95-98 degrees here in miami, after the venting im seeing stop and go 195-200 and cruising would be 180-190.

I feel it did make some what of a difference however the intake manifold still gets pretty hot, and you guys have any brighter ideas.

Heres some pics, since this did help im gonna buy a hood with the vents in it already carbon or fiberglass makes no difference since im gonna paint it.

[thatcarguy350]

Is your air intake isolated from the heat of the engine bay? You can try making an air box collecting fresh air from a duct in the hood of your car. You'll have to make sure there is a proper seal between the hood and the air box, though. Think, NACA duct. It'll give you a cooler intake charge, somewhat decreasing the internal temps of the intake manifold.

[elwesso]

Ive noticed the same thing to a certain degree on my Q. the intake gets pretty warm.

[David Steele]

High pressure follows only low pressure.

It's a law that you cant defy.

[gs14racer]

Ok what are you trying to say.

[mtcookson]

A popular thing now is intake spacers made out of delrin or something similar. It is supposed to drop the actual intake temps a decent amount. The way out intakes are design I would think it would be easy to make some but with a lot of swaps going on, thickness would definitely be a concern.

[Mettler]

Not delrin, tufnol. Tufnol is material specifically designed to be temperature resistant and transfer no heat through it. It should be reasonably available from any major plastics supplier.

[Jeff Taylor]

Some ideas, maybe...

Bigger radiator -- one with the cooling capacity to handle a V8Radiator shrouding - Helps a lot.Wrap your exhaust manifolds - keep some of the heat inConstruct heat shields around the manifolds

[gs14racer]

I guess i didnt post what i already had.

I already have a koyo almuinum radiator which is twice as thick as the stock vh radiator.

I have 2500cfm flexalite fans.

I also have my manifolds heat wrapped.

I was thinking of the heat sheilds around the manifolds but i was worried that it would trap to much of the heat in the heads, any thoughts
Modified by gs14racer at 9:01 AM 8/24/2007

[mtcookson]

Not delrin, tufnol. Tufnol is material specifically designed to be temperature resistant and transfer no heat through it. It should be reasonably available from any major plastics supplier.

You're right. I don't know why I was thinking Delrin.

[DeXteR]

water injection

the manifold spacer is something honda guys have been doing for a while... i've been seeing them for DSMs too... good idea.

[defrag010]

shrouding your radiator is very important for "heat management". If there is any air that is going through the front of your car that doesn't go through the radiator, then that's less cooling you will get. Completely block off the flow of air through the front of your car on anything but the radiator, and I will be money you won't have cooling problems.

[David Steele]

Ok what are you trying to say.

Positive pressure (front of the car)

Low pressure (trailing fender edge, front of front tires, front portion of hood & rear of the car)

When high pressure is ducted to low pressure = Air movement.

[T45]

GS, are you running coolant through your throttle body or did you bypass it? I was thinking about running it through a valve so I could close it during summer and open in cold temps. Otherwise it's just heating the TB all the time. I have the TCS model so plumbing may be different but I think all TB's have the coolant lines.

Just a thought.

[gs14racer]

Im only running coolant thru the engine, nothing else.

My vh is pretty bare bones, no idle air control valve, no egr, no fast idle, i think it was like 5 lbs of junk from the top of the engine.Theres so little that i can remove the intake manifold in under 5 minutes lol.

[T45]

My vh is pretty bare bones, no idle air control valve, no egr, no fast idle...

No wonder it stalled in your youtube vid. haha

I am removing a lot of stuff from the VH too. This thing has way too many hard lines and "orifices". I'm deleting EGR and TCS. I pulled the TCS butta-fly and filled in the shaft holes with Belzona. I need to make a plate for the missing motor and also the missing EGR intake port. I would venture to say that I pulled 10-15 lbs of crap off at least.

[gs14racer]

Actualy it stalled because the maf was held on by duct tape haha.

Once you adjust the idle its fine my car idles at a rock steady 800 rpms.

[Q45tech]

Some method to increase the coolant volume from 10 to 14 quarts should surfice.

[NOR*CAL 916]

my q45 heat range is about the same as your engine, i noticed a good improvement installing the plastic cover under the engine. i have an HKS fan controller so i can monitor temps accurately