I was washing my car today, and it dawned across me that my hood is vented right overtop of the exhaust manifold,,,, when it rains or I wash it, the manifold gets very very soaked, doesnt seem to be a problem for n/a

But when I install my ramhorn manifold and a lot more exhaust is coming out and heating the piping to even higher temps and this mani has some stress from having a turbo and downpipe hanging off of it

Will it crack

The car is a DD and rain obviously happens

Just wonderring what has to be done or should be done

Maybe Ill have to bang out a heat shield or some sort of shield where the hood vents where the water could roll off to the side?

Need some help, dont know how serious it is

 

Get rid of the ricer hood

Seriously thou, I don't think it will crack. . . . But a heatshield couldn't hurt (well performance, but it will hurt the cosmetic aspect )

 

Im not huge for how its gonna look, its a DIY ramhorn, not a $2000 FullRace

Hood is fiberglass, she aint going know where

 

Extreme heat and the sudden cooling from cold water can't be good for a manifold. Alot of them crack from no water at all so i'm sure adding some can't be the best thing. I would go with a OEM hood if I were you.

 

Naw this fiberglass one is defientely staying, looks great and weighs under 6lbs

if I have to Ill bang up a little drain system under that vent and make it drain further up

 

I would try and rig up some ducting on the udnerside of the hood vents so if water does go in, the water will run through the ducting and drizzle down away from the ram horn. I jsut don't like the idea of freezing rain touching a 1200+ degree manifold. Sudden temperature changes are never a good thing for anything.

 

get the manifold coated if it bothers u that much.

fyi oem exhaust systems get water on them from rain all the time too

given the thick piping most ramhorn manifolds use it shouldn't really matter

 

I thought the manis only got to like 300 degrees, thats why JL weld could be used to patch some holes

I think I might rig up a little thing underneath just to keep it away from the distro /mani

 

manifolds for sure get hotter then 300. i dont even think my EGT gauge reads that low.

platinum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by W O T &raquo;</TD></TR><TR><TD CLASS="quote">I thought the manis only got to like 300 degrees</TD></TR></TABLE>

yeah.. maybe after 10 mintues..

 

Well considering exhaust gase can reach even 1500*, Alot of that heat will transfer and heat up the actual manifold as well.

 

Anybody in here have a vented hood

Maybe Ill grab a pics off the net to show an example of mine

 

yea, get some pics... id like to see your car.

 

yeah i have a vented hood also...i did it to let heat out and the vent is huge and right above the turbo manifold

however, i do not ever drive the car in the rain

i would say that getting water on a hot manifold would be very bad for the manifold

you should make a shield to put in there when it rains to seal the hole or redirect the water away from the manifold...you could probably take a piece of stainless sheet and cut it to the size of the hole in your hood and then have a few clips on the underside of the hood to hold it in place, then you can take it off when its dry out

or you could make an actual shield that attached to the manifold itself to cover the runners, kinda like the stock heatsheild over the headers, but that would kinda **** up the coolness of the manifold

for washing the car, if you wash it at home, you could just put a towel over the manifold (as long as it is not hot) and that would keep it dry so when you started it up there wouldn't be water all over the turbo parts

anyway good luck

 

an EGT of 1300 F is normal..hehe.

 

I've had our vented hood on my car for like 2 years with no problems.

 

^^ daily driven?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Short Round &raquo;</TD></TR><TR><TD CLASS="quote">get the manifold coated if it bothers u that much.

fyi oem exhaust systems get water on them from rain all the time too

given the thick piping most ramhorn manifolds use it shouldn't really matter</TD></TR></TABLE>

 

 

Why not just make some nuematic covers that when it rain's you can hit a switch and they will slide into place and close off the vents.

 

Yea i have a CF vented hood also. I was woundering the same thing. But I haven't had any problems in the past 2 years. And it is daily driven to school and back. I do like to paint the manifold with high heat paint everyonce in a while. And at 1300F the water doesn't effect the metal of the manifold unless you drive into a lake. It is a drip or 2 getting on the manifold. When I wash my car I spray the water away from the vent, so it doesn't flow down there. That just my 2cents

 

Small drops of water wont do **** to cool the maniflod down fast enough to crack it.

You would have to submerge the thing to do that.