Should I go for a vented hood? Anyone got pics or have a vented hood?
12-04-11, 09:24 PM
#23
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Vented hoods are generally to keep the engine compartment cool(er). Most turbocharged cars (i.e., Mitsubishi Evolution) have ventilated hoods to allow the engine heat (and turbo heat) to escape. In the case of the Mitsubishi Evolution, or in any hood that has the vents facing backwards, the outside wind pressure pulls hot (and power soaking) air out from your engine bay allowing cooler air in from the bottom or through the grille. You generally gain some cooling benefits allowing your vehicle to take better advantage of the HP it can achieve.
For those who might think I'm saying it increases your HP -- I'm not. I'm simply saying it will help your engine from heat soaking and ultimately losing HP. In the case of a turbocharged vehicle, it also helps a bit with turbo lag from heat soak. I used to own an Evo 9 MR (425 whp at 23 psi) which had a ventilated hood (stock), and after normal daily driving - if you stop at a stop light, you can see the heat waves billowing out from the hood vents.
For the most part, both the IS250 and 350 shouldn't have ventilated hoods unless your doing it purely for looks. There are hardly any engine modifications that you can do that will drastically increase engine compartment temperatures warranting a hood vent (unless you turbocharge your IS).
Last edited by reset2k; 12-04-11 at 09:31 PM.
12-04-11, 10:44 PM
#26
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Surprised no one answered this yet.
Vented hoods are generally to keep the engine compartment cool(er). Most turbocharged cars (i.e., Mitsubishi Evolution) have ventilated hoods to allow the engine heat (and turbo heat) to escape. In the case of the Mitsubishi Evolution, or in any hood that has the vents facing backwards, the outside wind pressure pulls hot (and power soaking) air out from your engine bay allowing cooler air in from the bottom or through the grille. You generally gain some cooling benefits allowing your vehicle to take better advantage of the HP it can achieve.
For those who might think I'm saying it increases your HP -- I'm not. I'm simply saying it will help your engine from heat soaking and ultimately losing HP. In the case of a turbocharged vehicle, it also helps a bit with turbo lag from heat soak. I used to own an Evo 9 MR (425 whp at 23 psi) which had a ventilated hood (stock), and after normal daily driving - if you stop at a stop light, you can see the heat waves billowing out from the hood vents.
For the most part, both the IS250 and 350 shouldn't have ventilated hoods unless your doing it purely for looks. There are hardly any engine modifications that you can do that will drastically increase engine compartment temperatures warranting a hood vent (unless you turbocharge your IS).
Vented hoods are generally to keep the engine compartment cool(er). Most turbocharged cars (i.e., Mitsubishi Evolution) have ventilated hoods to allow the engine heat (and turbo heat) to escape. In the case of the Mitsubishi Evolution, or in any hood that has the vents facing backwards, the outside wind pressure pulls hot (and power soaking) air out from your engine bay allowing cooler air in from the bottom or through the grille. You generally gain some cooling benefits allowing your vehicle to take better advantage of the HP it can achieve.
For those who might think I'm saying it increases your HP -- I'm not. I'm simply saying it will help your engine from heat soaking and ultimately losing HP. In the case of a turbocharged vehicle, it also helps a bit with turbo lag from heat soak. I used to own an Evo 9 MR (425 whp at 23 psi) which had a ventilated hood (stock), and after normal daily driving - if you stop at a stop light, you can see the heat waves billowing out from the hood vents.
For the most part, both the IS250 and 350 shouldn't have ventilated hoods unless your doing it purely for looks. There are hardly any engine modifications that you can do that will drastically increase engine compartment temperatures warranting a hood vent (unless you turbocharge your IS).
12-05-11, 06:54 AM
#27
Fast & Furious days are over. Keep it stock. Come resale time you will wish you had a stock hood unless you find a teenage buyer and he/she won't have the money for your car. Don't screw up a good thing.
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