Installion of Verus Engineering Heat extractors onto hood of my FD
#1
Full Member
Thread Starter
Join Date: May 2020
Location: Babcock Ranch Florida
Posts: 113
Likes: 0
Received 25 Likes
on
15 Posts
Installion of Verus Engineering Heat extractors onto hood of my FD
Under hood heat is a big deal with these cars and I have been looking for a suitable solution and found these heat extractors on Verus Engineering website..
They are for a Honda Civic SI hood but look like they will work on the FD.
I do not care for any of the replacement vented hoods that I have see so far and I am thinking that these extractors will not only work well but may suit the lines of the car very well.
Taking the car to Sebring tomorrow so will be staring this project next week, will take pics of the process and will take temp readings of the hood under different circumstances before and after,
Dave
They are for a Honda Civic SI hood but look like they will work on the FD.
I do not care for any of the replacement vented hoods that I have see so far and I am thinking that these extractors will not only work well but may suit the lines of the car very well.
Taking the car to Sebring tomorrow so will be staring this project next week, will take pics of the process and will take temp readings of the hood under different circumstances before and after,
Dave
The following users liked this post:
estevan62274 (02-19-21)
#2
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,841
Received 2,604 Likes
on
1,847 Posts
temp readings will be interesting, we did these on the Miata race car, and they didn't do anything (although on the one rainy weekend it did scoop the mud up and put it in the drivers lap, which is pretty funny)
#3
Urban Combat Vet
iTrader: (16)
——> https://www.rx7club.com/3rd-generati...-fixes-448589/
@Howard Coleman CPR Were you ever able to get follow up data?
@Howard Coleman CPR Were you ever able to get follow up data?
Last edited by Sgtblue; 02-20-21 at 01:07 PM.
#5
Rotary Enthusiast
I am interested in the results.
#6
Racecar - Formula 2000
IMO, placement will be critical in their effectiveness. Too far forward, and they may not extract the hottest air. Too far rearward, and they may not work because of the higher air pressure caused by the windshield slope.
I will also be interested in the results.
I will also be interested in the results.
#7
Racing Rotary Since 1983
iTrader: (6)
i still run the louvers i had made for my hood. i did testing on them and found the biggest effect was at shutdown when my engine compartment used to bake. temps rose to 200 F and took over 30 minutes to normalise. temps hardly rose on shutdown w the louvers. i noticed little underhood temp change while driving the car and had temp probes in a couple of places.
since i swapped in a 153 F thermostat and and a FullFunctionEngineering water pump idler my coolant has dropped from 87 c to 67 c and opening my hood after a drive is a non event rather than opening the door to a blast furnace.
i suggest the thermostat and idler pulley and skip the louvers/vents
since i swapped in a 153 F thermostat and and a FullFunctionEngineering water pump idler my coolant has dropped from 87 c to 67 c and opening my hood after a drive is a non event rather than opening the door to a blast furnace.
i suggest the thermostat and idler pulley and skip the louvers/vents
The following 2 users liked this post by Howard Coleman:
Sgtblue (02-22-21),
Tim Benton (02-25-21)
Trending Topics
#8
Rotary Enthusiast
[QUOTE=Howard Coleman CPR;12456690]i still run the louvers i had made for my hood. i did testing on them and found the biggest effect was at shutdown when my engine compartment used to bake. temps rose to 200 F and took over 30 minutes to normalise. temps hardly rose on shutdown w the louvers. i noticed little underhood temp change while driving the car and had temp probes in a couple of places.
since i swapped in a 153 F thermostat and and a FullFunctionEngineering water pump idler my coolant has dropped from 87 c to 67 c and opening my hood after a drive is a non event rather than opening the door to a blast furnace.
Howard are you running your car that low? I swapped my oem thermostat back in because my car was running too cold with the mishimoto.
since i swapped in a 153 F thermostat and and a FullFunctionEngineering water pump idler my coolant has dropped from 87 c to 67 c and opening my hood after a drive is a non event rather than opening the door to a blast furnace.
Howard are you running your car that low? I swapped my oem thermostat back in because my car was running too cold with the mishimoto.
#10
Rotary Enthusiast
I was thinking the same but, with all the heat generated I don't see how any form of vents can't help reduce strain on the cooling system. I would not sweat if oem was easily available. I wish someone did actual testing before with different hoods. I did some intake experiments. Just blocking the heat from the turbos in a half *** manner resulted in 10°f difference in air around the intake. A hood has to make a bigger difference than what most think.
Maybe like HC said it is more of an after shutdown thing, but even that is a nice benefit.
#11
RX-7 Bad Ass
iTrader: (55)
Ceramic coated downpipe also makes a massive difference in underwood temps.
Hell, just getting rid of the precat is half the battle .
Dale
Hell, just getting rid of the precat is half the battle .
Dale
#12
Urban Combat Vet
iTrader: (16)
Originally Posted by DaleClark;[url=tel:12456747
12456747]Ceramic coated downpipe also makes a massive difference in underwood temps.
Air movement under the hood also seemed to improve a bit when I removed emissions and things like the air pump and split-air by-pass tubing.
Last edited by Sgtblue; 02-22-21 at 10:01 AM.
#13
gross polluter
iTrader: (2)
i still run the louvers i had made for my hood. i did testing on them and found the biggest effect was at shutdown when my engine compartment used to bake. temps rose to 200 F and took over 30 minutes to normalise. temps hardly rose on shutdown w the louvers. i noticed little underhood temp change while driving the car and had temp probes in a couple of places.
#14
Racecar - Formula 2000
Placement near the outside edges of the hood, would, IMO, be the most efficient in extracting air while moving since the edges of the hood are in the lowest pressure areas available on top of the hood.
#15
Urban Combat Vet
iTrader: (16)
Wouldn’t ‘how’ the opening is shaped make a difference? I’m just thinking of the Mazdaspeed design. In addition to placement toward the front just aft of a SMIC, it also had the leading edge that (presumably) created low pressure at the opening...as opposed to how the OP intends to vent it.
Last edited by Sgtblue; 02-23-21 at 12:10 PM.
#16
Racecar - Formula 2000
Wouldn’t ‘how’ the opening is shaped make a difference? I’m just thinking of the Mazdaspeed design. In addition to placement toward the front just aft of a SMIC, it also had the leading edge that (presumably) created low pressure at the opening...as opposed to how the OP intends to vent it.
#17
Full Member
Thread Starter
Join Date: May 2020
Location: Babcock Ranch Florida
Posts: 113
Likes: 0
Received 25 Likes
on
15 Posts
Well they are on the car and I appreciate everybody's comments.
My car was not over heating, my primary interest in this was heat soak after shut down.
I managed to get them installed with a minimum of butchery and once I get a new sound blanket it will look pretty good.
These extractors were for a Honda and i was not sure how they would look but I am very happy happy with the result, they conform to the contours of the hood and did not require the removal of too much of the structural steel parts under the skin.
I am going to add some more of the bonding adhesive that attaches the skin to the frame tomorrow and after I get it cleaned up will do some more testing.
Unfortunately right now the outside temp is only about 80 degrees and in my initial testing the hood was only about 120 and 10 minutes after shutdown was down to 105, not what I expected.
I do plan on getting the down pipe coated and will add some shielding to the turbos at that time.
Next project is pillow *****.
Dave
This was my placement for the extractors
Paper patterns can move! After cutting the big opening set the extractor on the pattern and check the bolt hole alignment
Some trimming required inside
These vents are very well made.
I have not seen a replacement hood that did it for me, I like how this turned out and I think they will do exactly what I want.
My car was not over heating, my primary interest in this was heat soak after shut down.
I managed to get them installed with a minimum of butchery and once I get a new sound blanket it will look pretty good.
These extractors were for a Honda and i was not sure how they would look but I am very happy happy with the result, they conform to the contours of the hood and did not require the removal of too much of the structural steel parts under the skin.
I am going to add some more of the bonding adhesive that attaches the skin to the frame tomorrow and after I get it cleaned up will do some more testing.
Unfortunately right now the outside temp is only about 80 degrees and in my initial testing the hood was only about 120 and 10 minutes after shutdown was down to 105, not what I expected.
I do plan on getting the down pipe coated and will add some shielding to the turbos at that time.
Next project is pillow *****.
Dave
This was my placement for the extractors
Paper patterns can move! After cutting the big opening set the extractor on the pattern and check the bolt hole alignment
Some trimming required inside
These vents are very well made.
I have not seen a replacement hood that did it for me, I like how this turned out and I think they will do exactly what I want.
The following 3 users liked this post by david93fdr1:
#19
needs more track time
iTrader: (16)
That turned out looking ok.
fwiw, Race Louvers have done some rather interesting wind tunnel testing with their louvers. They have some good blog posts and video on youtube.
https://racelouvers.com/
fwiw, Race Louvers have done some rather interesting wind tunnel testing with their louvers. They have some good blog posts and video on youtube.
https://racelouvers.com/
#20
Rotary Enthusiast
I think it looks badass.... I still wouldn't do it, but I like it.
#23
Racecar - Formula 2000
Increased air pressure at speed due to the windshield angle is greatest in the center. Air-flow around the windshield reduces that pressure and so at some lateral distance from the center, pressure above the hood becomes lower than it is in the engine compartment. But air extraction at speed is not a given, so an air-flow study needs to be done to see if the vents function at speed.
Last edited by DaveW; 02-25-21 at 08:43 AM.
#24
Full Member
Thread Starter
Join Date: May 2020
Location: Babcock Ranch Florida
Posts: 113
Likes: 0
Received 25 Likes
on
15 Posts
I drove the car today and made some further tests. The extractors are pretty far forward of the windshield , don't think that inversion will be a factor. Have to wait for the rainy season to see what happens there. But I did measure the air temps and the airflow thru the extractors while it was idling with the AC on and the 2 Spal fans running.
A piece of paper over the extractors is blown upwards by outgoing air. The temp of the hood around the drivers side was about 120 with air temp coming out of the extractor about 140. Passenger side a little hotter because of the turbos, about 130 on the metal, air temp out is 140-165.
So far they seem to be working as planned with no apparent downside and they look pretty damn cool as well.
Dave
A piece of paper over the extractors is blown upwards by outgoing air. The temp of the hood around the drivers side was about 120 with air temp coming out of the extractor about 140. Passenger side a little hotter because of the turbos, about 130 on the metal, air temp out is 140-165.
So far they seem to be working as planned with no apparent downside and they look pretty damn cool as well.
Dave
The following 3 users liked this post by david93fdr1: