#356, can you please comment on my theory in my posting to chesterc?

Thanks in advance!

ZoranC

 

not totally sure what you mean there Zoran, cuz its kind of wordy but if its cooling that you want of the entire engine bay, and not the intake air temps, and you are deciding between a non function ram air hood, or non functional cowl hood (non functional referring to having opened holes, but not directly hooked up to the airbox) you best bet would be a ram air hood. The openings in the front of the hood allow more air to flow in and over the top of the engine bay and around. the cowl would allow a little less air and slow air speed i'd image because its got a longer path to travel, and a smaller opening to enter the engine bay. Either way, i really doubt you'd notice any performance gains at all with either type of hood. All its gonna do it let the engine cool a little faster when you shut it off, especially since you have a stock airbox and its pulling hte air from the fender and not the engine bay anyway.
If you have an open filter intake, such as mine or any others, the cool air coming into the engine bay will help get a little more cool air into there for lower intake temps quicker, but i couldn't tell any difference with the hood as comparted to without it.

but when i do shut off the eninge after a good distance drive, and i put my hand infront of a scoop, i can feel the air rushing out cuz hot air rises and it just allows the air to escape faster.

So not sure exactly what you are after with getting a cowl or ram air hood, but since its not going to be functional other than just to help cool the engine a little bit, you best bet would be to get the hood that looks best to you. You really aren't gonna notice anything performance wise, so this is more a mod for appearance

hope this helps some

 

Yes, being wordy is in my nature, ShowYa can confirm that

I don't expect any performance gains from them, nor is that reason why I am looking into them. Cooling of whole engine bay is what I am after.

However, I don't think they will help only when engine is shut off. I feel there is also benefit when engine is running. Only question is which one will help more to engine bay. My feeling is cowl design because it would improve airflow in complete cross section of engine bay (while I suspect that ram air improves just top). What I was looking for is does someone have facts that would prove me as right or wrong.

Thanks again!

ZoranC

 

i really doubt you'd notice a difference over cowl vs ram air intake, because the both SUCK the air into the engine compartment. You'd probably get more air flow and circulation from the ram air though because its coming in from the front with the most direct and fastest air flow, and would push down through the engine compartment when it hits the engine and back wall. the cowl has a longer path for the air to come in, more curves, and alot smaller inlet, which would slow the air down alot more in comparison and less air would get in there. but like i said, you probably won't notice any or such a small difference between the two, since they both suck air into the engine compartment from the top of the engine compartment and it blows down somewhat down. So your best bet would be get something that looks the best to you. I can tell you don't race your truck cuz you are stock in the engine stuff, so its not like the engine will be generating more heat from bigger pullies or other mods and racing down the track. Heck, the stock hood might allow for cooler engine compartment temps being thin aluminum, rather than that really thick fiberglass that would more likely hold the heat in better. so just pick whichever one looks teh best to ya. this is an appearance mod more than anything else.

why do ya think the cowl hood would be better? just curious

 

Because from everything I know about dynamics of liquids (and air is a liquid) my gut feeling tells me cowl would generate better airflow (better path, less heat pockets, less turbulence) accross complete bay, especially if I change grilles to let even more air in.

Thanks again!

ZoranC

 

how would you consider air flowing further and through more curves and in a big hole and back through 2 little holes less turbulant and a better path than directly in through the front of the hood through 2 unobstructed scoops?

not sure if you realize that the cowl hood just isn't a big opening at the back, but rather a screened hole, then 2 smaller oval shaped holes

i've got pics of cobra's hood from when i was riding on the inside that i took facing out of the back of the hood that i can upload if you want.

here's a pic of the front side




i still think a ram air is you best bet if its the most airflow possible to cool the enigne, although i don't think its that big of an issue to worry about for spending almost a grand on a hood for since its not for looks. Maybe its just me, but i think you're looking into this a little too much especially since you don't race and your engine isn't modded and making more heat than a stock one

 

just thought of something,...why not louver the stock hood?

 

You are right, didn't know this, now you know why I asked you, you know everything

I thought (wished?) it is completely open in the back. Do you know of any that are like that? If not then yes, ram air would provide better cooling.

Thanks again!

ZoranC

 

i guess thats what the hang up was there. LoL. Don't know of any that are open fully in the back. Only other cowl hood that i know of is Reflexon's, Harwood, and Proglass. proglass is functional though, so you wouldn't want that, and harwood isn't as good as quality as cervini's, and reflexon's is steel and megga heavy.
i'll check into it tomorrow for ya though

 

Thanks in advance! Can you also, please, give me a pointer on questions I asked under my infamous 'no whine' thread?

Thanks again!

ZoranC

 

you want me to read that WHOLE thread? i've been kind of keeping tabs on your problems. I don't really know much that would help you though in that area, so thats why i haven't posted much in that thread. Still learning alot about s/c engines

I'll get on the hood thing tomorrow. I"m gonna make up a new thread for newbies and have pics of every hood i can find and all that

 

No, not the WHOLE thread Just last question about boost and air/fuel measurement and gauges.

Thanks in advance!

ZoranC

 

thats not so much my area. hopefully eventually i'll get to learn more about that stuff, but i posted in that gauge pod thread. not sure if that'll help you out or not

 

I thought you know everything!

Thanks! ZoranC

 

very entertaining......and educational at the same time...