Do vented hoods actually work? - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Kingtal0n · 08-24-2023, 01:19 AM

Hey I remember this thread

Heres my engine bay currently

Plastic intake is an insulator, it runs 135*F
Exhaust Downpipe is wrapped and double shielded
Radiator ducted with shields and flow separated from intake plumbing
Stock hood closes tightly with OEM rubber seal at the back
Heat shield separates exhaust crossover and downpipe from exhaust manifolds

I have a couple shields that aren't shown in the pictures because I'm just being lazy. But the idea is basically reflect as much of the radiant heat back into the exhaust while insulating as much heat as possible into the engine while keeping the components such as coil packs, injectors, electrical stuff cool. You measure their temps with the infrared temp gun, the coils should not really exceed the temperature of the valve covers and the valve covers should not exceed the temperature of the oil and if you have done your job correctly the oil should not exceed the temperature of roughly boiling water at atmospheric pressure- near 210 to 220*F max temp oil is ideal for daily drivers. The coolant needs to stay near the temp of the oil as well, I run 195 to 205*F coolant and 200 to 215*F oil temps almost all day everywhere no matter what the situation is.

This car sits in daily driver traffic bumper to bumper high noon, it sits in drive through, it cruises highway for 200 miles, it does stoplight stuff, the fans kick on and off sitting in traffic.

Have some video fun

Tire chirps video
https://www.youtube.com/watch?v=RswyLY1kqac

Un-cut un-edited drive
https://www.youtube.com/watch?v=1y09lYL4Now

0:05 get on highway cruise note 16's
3:38 note 15.8 to 16.0:1 still cleaning plugs @ 65mph in traffic
5:18 kick out of lockup and small boost in 4th to move up in traffic
6:29 step down lightly into lockup for some boost in 4th
7:18 get off highway
8:23 downshift rip the tires loose at 50mph
9:12 slowing down for stoplight
9:20 Showing A/F Stopped at stoplight note 14.7 to 15.0 open loop steady
10:51 leave light, turbine whistle
11:30 cruising 15.6 to 16.0 housekeeping plugs
12:18 rip tires loose at 50mph 'spool character'
13:05 stopping for traffic light
13:10 show a/f for traffic light stop 15.5 walking into 14.7 to 15.0 open loop
13:52 2nd gear chirp coming leave light

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08-24-2023, 01:19 AM	#31
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 42 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	Hey I remember this thread Heres my engine bay currently Plastic intake is an insulator, it runs 135F Exhaust Downpipe is wrapped and double shielded Radiator ducted with shields and flow separated from intake plumbing Stock hood closes tightly with OEM rubber seal at the back Heat shield separates exhaust crossover and downpipe from exhaust manifolds I have a couple shields that aren't shown in the pictures because I'm just being lazy. But the idea is basically reflect as much of the radiant heat back into the exhaust while insulating as much heat as possible into the engine while keeping the components such as coil packs, injectors, electrical stuff cool. You measure their temps with the infrared temp gun, the coils should not really exceed the temperature of the valve covers and the valve covers should not exceed the temperature of the oil and if you have done your job correctly the oil should not exceed the temperature of roughly boiling water at atmospheric pressure- near 210 to 220F max temp oil is ideal for daily drivers. The coolant needs to stay near the temp of the oil as well, I run 195 to 205F coolant and 200 to 215F oil temps almost all day everywhere no matter what the situation is. This car sits in daily driver traffic bumper to bumper high noon, it sits in drive through, it cruises highway for 200 miles, it does stoplight stuff, the fans kick on and off sitting in traffic. Have some video fun Tire chirps video https://www.youtube.com/watch?v=RswyLY1kqac Un-cut un-edited drive https://www.youtube.com/watch?v=1y09lYL4Now 0:05 get on highway cruise note 16's 3:38 note 15.8 to 16.0:1 still cleaning plugs @ 65mph in traffic 5:18 kick out of lockup and small boost in 4th to move up in traffic 6:29 step down lightly into lockup for some boost in 4th 7:18 get off highway 8:23 downshift rip the tires loose at 50mph 9:12 slowing down for stoplight 9:20 Showing A/F Stopped at stoplight note 14.7 to 15.0 open loop steady 10:51 leave light, turbine whistle 11:30 cruising 15.6 to 16.0 housekeeping plugs 12:18 rip tires loose at 50mph 'spool character' 13:05 stopping for traffic light 13:10 show a/f for traffic light stop 15.5 walking into 14.7 to 15.0 open loop 13:52 2nd gear chirp coming leave light