I read an article, I think it was Turbo magazine. Saying that vented hoods can reduce intake temperatures by 200F. IS this true? If it is, wouldnt it justify buying a vented hood for the fd? Cheers

 

No

 

i wish

 

maybe to A MAX actualy with intake temps no, but maybe temp of the turbos themselvs... if that were true some days my car would be freezing. Vented hoods to make a noticeable differnece but not 200degrees noticeable

 

i do not think so........

 

Complete fabrication, like most of the crap printed in those mags.

It's pretty easy to mount a thermosensor in the engine bay and get a REAL temp delta, but no one seems to do it or publish the info if they do. Makes you wonder just how effective a vented hood really is, no?

 

Yeah, I thought it was pretty bullshit. But I had to question it because I kind of respect turbo magazine since they tend to leave the ricer gayness out of their pages. Does anyone know what the intake temp difference would be with, say, a mazda speed hood on your fd? Just curious as to how effective they really are

 

I suspect the underhood temps would drop much faster after sitting. As well, might expect better cooling with appropriate ducting from an IC, or RAD.

 

Unfortunately as part of the Primedia conglomerate I think its taken a serious slide, rumor has it it may even be cancelled in the near future due to lack of sales. I'm sure worthless rice rags like Stupid Street will still get published though.

 

I think the only way that would work is if it was a "scoop stlye" and you were in alaska during the winter...duringg a snowstorm...THEN I could see that woking...but other wise I dont see it droping the temp by that much, ture it may drop the temp by letting the heat out and let the airflow in to the engine bay better but thats about it... after all let us not forget if that does work then VINYL MUST ADD HORSEPOWER! OFF TO THE STICKER SHOP!!!

 

Well vented hoods do work, but...

- when it's hot and the air is stagnant the UIM and other metal parts get hot. Since the air intake thermosensor is in the UIM, the *reading* will read higher. The intake air gets a little warmer, but not as warm as the reading suggests. The ECU will richen the mixture and cost some power if the reading gets high enough.

- the vents clearly help let out much hot air circulating above the block and turbos. Judging by how the solenoids and stuff embrittle and malfunction due to heat and time, the cooler bay temps will certainly help reliability in the long run.

- if you're running a hot air intake, the vented hood may help some because it's pulling from a somewhat cooler source. However, IMO the sensible fix is to make it a cold-air intake instead, not install a vented hood.

All in all, I can assure you the 200F figure is crap. Venting a hood helps, but not that much.

Dave

 

What if they meant 20F not 200F, or if there was a typo in the first post? 20F is believable. But not IATs, more of a Underhood temp believeable.