Dual hood vents
09-23-2002, 03:28 PM
#1
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Dual hood vents
I was wondering if anyone could answer this stupid question.
I just got a 78 with dual hood vents and the left one has a cover panel bolted to the bottom of it, the right one is free flowing. i was wondering why this is being that the left side of the engine compartment with the intake/exhaust manifolds would stand to have a greater need for improved cooling then the right side where the vent sits over the spark plugs and fusible links, whcih doesnt make sense with water dripping down on them.
I was curious if maybe both sides came covered from the factory and the right one was removed for some reason, and also is it a good idea to remove the panel from the left side for improved air flow or is the cover panel there for a good reason?
BlaZed
I just got a 78 with dual hood vents and the left one has a cover panel bolted to the bottom of it, the right one is free flowing. i was wondering why this is being that the left side of the engine compartment with the intake/exhaust manifolds would stand to have a greater need for improved cooling then the right side where the vent sits over the spark plugs and fusible links, whcih doesnt make sense with water dripping down on them.
I was curious if maybe both sides came covered from the factory and the right one was removed for some reason, and also is it a good idea to remove the panel from the left side for improved air flow or is the cover panel there for a good reason?
BlaZed
09-24-2002, 09:44 AM
#3
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
Re: Dual hood vents
Air box? The 280Z has an aluminum intake manifold, and that doesn't usually rust. I think they came both un covered from the factory and someone put a cover on one side for some reason. Maybe for winter driving. I would take it off and leave both sides open. If you think any of the electronics on the right side are getting wet, you can put the cover on that side or try to fabricate a plastic cover for your electrical components.
09-24-2002, 01:54 PM
#6
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
Re: Dual hood vents
That's what he was saying. The driver's side (left side) has a plate underneather the vent that prevents air from cooling that side. That is why I suggested he remove that plate.
Also, this is not a turbo ZX or a 240Z. It is a 280Z. Please read what the buy posted originally.
Also, this is not a turbo ZX or a 240Z. It is a 280Z. Please read what the buy posted originally.
09-24-2002, 03:29 PM
#7
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Re: Dual hood vents
Wrong..... all vented cars come i with the cover on that side ...... and one reson is to stop water around the induction area .... im thinking 260Z though .... in '76 on we got 260Z 2+2's with vented bonnets, so thats what i was talking about when i said airbox....injectors then i suppose .. not much else under there ...
72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver
72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver
09-24-2002, 03:44 PM
#8
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Posts: n/a
Re: Dual hood vents
The dual vents were added to combat overheating probs/fuel perculation in the FI Z's (north america)
The drivers side is originally covered.. to protect electronics, and to have a matched look (cosmetics)
Remove it.. I did.. funny part is on hot days in stop and go traffic,. the heat distorts the drivers vision.hehe
No worrys about taking it off..
The drivers side is originally covered.. to protect electronics, and to have a matched look (cosmetics)
Remove it.. I did.. funny part is on hot days in stop and go traffic,. the heat distorts the drivers vision.hehe
No worrys about taking it off..
09-25-2002, 09:58 AM
#12
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
Re: Dual hood vents
Ok, so you got the vents in 1976, while in the US and Canada it was the 77+ Z's. I'm not sure on the early 280zx, but my 1982 280zx (turbo style hoods) has a very large air duct on the left side that is completly open. No shields. There is a shield inside the engine compartment that deflects air away from the brake cylinders and down toward the exhaust. That makes good sense though, to help draw the air down around the exahust and out under the car. The right side has the smaller vent as you know. It is open underneath (no plates) but doesn't look like it has much use. The only thing that gets a little wet is one side of the battery. The ZX engine compartment is wider, and therefore the electroncis along the side are pretty far away from any openings.
My triangular strut tower bar is right below the large vent. You can see it easily there when the hood is closed. It probably blocks some of the air flow, but I'm running an N/A motor.
My triangular strut tower bar is right below the large vent. You can see it easily there when the hood is closed. It probably blocks some of the air flow, but I'm running an N/A motor.
09-25-2002, 10:13 AM
#13
Guest
Posts: n/a
Re: Dual hood vents
in our cars battery and brake cylinders are swapped around .. along with stearing etc ... lot more room on out cars .. dont have the steering right near exhaust and everything ..
72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver
72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver
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