POISON SPYDER HOOD VENT REVIEW - Does it make your Jeep run cooler? 

I got an 07 JK 2dr with the old 3.8 but those catalytic converters heat up the engine bay stupid hot. I trimmed the fender liners, dropped the thermostat down to 180 F, and the best thing of all so far-Added a thermostatic switch and relay to cycle the low speed fan on when temps get high and it seems to make the most difference after a hot soak. Example-Go into the grocery store on a 95 plus day and come back out in 15-30 minutes and the fan cycles on a few times to evacuate a lot of the heat in that small engine compartment. I'll be doing a clutch in 20Kish miles and those cats will be taken care of so as not to have to worry about that heat source anymore. I might try a hood vent but am kind of concerned about rain water getting on electrical stuff like the TIPM, etc. Thanks for the review.

I absolutely love my Poison Spyder hood louver. You pretty much hit the nail right on the head with everything. I personally didn’t leave that internal X brace on the underside of the hood, I cut right through that too. I feel like it just opens it up a tad more. But that’s neither here nor there. Nice quality simple video. Keep it up!

I installed two hood vents in my 2000 Jeep Cherokee sport. I've noticed since I've added an auxiliary fan, it never gets out over 210. That 4.0 is awesome except for long waits in the drive thru on a warm day.

Hyline offroad hood louvre… Its my fav mod for my JK. Hasn’t faded at all.

I want to complement you on your honesty and accuracy on two accounts: 1. The Hood Vent, as you said, will not have any affect on lowering the coolant/engine temp. But, as you mentioned, it does a great job of allowing all that excessive heat to escape from the engine compartment, thus increasing the life of all the other engine components, wiring and hoses....plus, it does look very BAD ASS! 2. Also, like you, I swapped out the stock thermostat, which, once again resulted in the same results as yours: took longer to heat up, but it never lowered the operating temp of the engine over the stock thermostat, on very hot days. Very disappointing....but it got worse! I lost 3-4 miles per gallon. Why? Because on cooler days, it stayed at about 200 degrees, which the engine management system viewed as cold, so it stayed in run rich mode. So guys, don't be tempted to make this conversation, it's not going to help, only hurt. The one thing I did, that did make a small difference, was converting to the plastic K+N intake, which I further modified by wrapping it with that silver bubble wrap insulation you can find at Home Depot. I have a Super Chip engine monitor, so I can see what the intake air temp is. Following the described changes, the intake air charge temp dropped by10 to 20 degrees, depending on ambient air temperature and vehicle speed, vs the stock set-up. So now, my normal operating temp is at 210 degrees, except for full throttle or long up-hill runs....which, bugs the Hell out of me! Jeep, you need to do better; I expect better from the Beast we call "Jeep." I'm thinking about going to an engine tuner, to see if bringing the fan on sooner and faster can correct this shortcoming. And? Another, don't bother conversion idea: a 2 or 3 row radiator. I tried that too. Didn't help. Stayed with the 2 row, as that was my most recent conversion. Can't say it's any better than a single row. Now, a double pass radiator might be our answer, but I was too chicken to try it, as I was concerned about fitment issues. These radiators are a universal design, leaving it up to you to make it fit. I was already at the point of frustration, and didn't want to tempt fate at this point. Do? Think about Silicone radiator hoses, as they can take the punishment. I expect them to out-last conventional hoses 2:1. Think about it if you do lots of desert trails, miles away from civilization. Side note: Got any Buddies who drive Toyota "FJ's?" Ask them what FJ stands for. Great question at the end of a hot desert day, relaxing with a cold one, next to the campfire. They won't know. But you do. It stands for "Fake Jeep!" Your relaxing, bonding time with your Buddies, just went to Hell. Sorry about that. The truth hurts sometimes. Do you think this was a Freudian slip on the part of Toyota, realizing that they couldn't match the history and toughness of a Jeep? Sorry; I love my Jeep, and I don't think there's anything better....guess it shows.

I like my Poison Spyder louver also. Just a tip, it’s easier to install if you take the hood off the Jeep. I put my hood on saw horses when I installed it.

If you program your engine fans to turn on at a lower temp with your lower temp thermostat jt will hold a lower temp. Just lower the thermostat temp won't do anything. You hVe to program the radiator fan as well. Which you can do with a diablosport tuner.

yep, too many folks think a louver hood will help cool the engine itself. I've had my Poison Spyder hood louver for over a year and have not installed it yet lol. Guess I need to get busy.

I would say that it will not help it run cooler but it will help it from overheating in given situations (like rock crawling on hot day)

Hey Dan, love the channel! Did you notice a reduction in heat in the cab area? Mine feels like a furnace in stock form!

Great video vary informative

Why not just using floor vents at a fraction of the cost

Does the powdercoat have any issue besides fading? If I end up going this route for mine, I may paint over the powder prior to installation. Surely a matte black automotive paint would last longer than the factory finish.

Dear God thank you for your review I was tired of just seeing install video's only

great video yeah I can't stand the watching a person unwrap a product and the say oh I love it it's better than the rest and works great after one day of use

My 93 grand Cherokee also gets hot to

Great video!!

Any issues with rain when the car is parked?

I wonder if this hood louver could cause Alternator issues with water falling into it during stop-and-go traffic during heavy rain ? 🤔

So you’re saying my coolant temp at 220-230 is pretty normal in the jk?

Thanks made my choice easier .

Nascar runs engines with thermostats that are 220 and up. Heat in the engine actually helps it to last longer, cooler thermostats generally are for performance. so Heat is bad for your engine is not exactly accurate, obviously way too much heat is bad. What about rain and carwashes, that water coming in? The benefit to the louvred hood would be coolness factor of its looks. Also if your rock crawling in the desert heat at 1 mph, it would help. It may also help if you were in a snow area in a white out as that heat would be blowing at the windshield maybe helping to melt some snow or ice of the glass.

would totally suck in snow country

The best thing you can do is to reprogram you computer to turn the fan on at a lower temperature that’s what I did my 2014 jk runs around 208-215 much better