Air Temp Discussion
11-22-19, 07:34 PM
#26
flip your radiator around and your air temps will drop tremendously. we did a v mount radiator on a friends fd and his air temps dropped by ~30c. he averaged 60-65c. now he can even get them down to ambient if he drives fast enough lol
11-23-19, 02:38 AM
#27
It's a little worrying that @jonahau's setup is still reaching such high temperatures since it's essentially what I'm moving to, to try and combat high IATs (HKS RS intake and M2 medium IC).
11-24-19, 10:26 AM
#28
With a M2 large and CF intake box, I’m used to seeing air temp in the 60s in slow moving traffic, and it takes forever to come back down. I’m always forced to stay out of boost throughout a 20 miles commute, and watch the commander like a hawk which is not fun. After a couple summer I just bite the bullet and go V-Mount, now I’ll see low-mid 40s in the same driving condition, drop to high 30s once I start moving. You won’t be able to stop the heat soak with SMIC unfortunately, with the radiator right below it and the fans constantly blowing hot air up to the IC in traffic. You can try to extend the IC duct or modify the intake to bring in more fresh air, which might help bring the temp down quicker once you are in motion.
11-25-19, 08:49 AM
#29
It's a little worrying that @jonahau's setup is still reaching such high temperatures since it's essentially what I'm moving to, to try and combat high IATs (HKS RS intake and M2 medium IC).
Current setup:
Stock IC
Stock Intake
AEM AI (water only) cold side
Triumph fast reacting IAT sensor
Average cruising temperatures (out of boost and after a cold start) around town are low to mid 50C, this is Bay Area so very temperate, ambient temps around 24C.
AI isn't setup to come on until 5 PSI, so unless I'm pushing the car, I won't get any benefits of AI BUT at the sametime, I am afraid to boost when the car was sitting at 76C (!!!) after a hot start. Once I got going, it started coming down but was still in the 60s until I got on the highway.
Any other people running the AEM AI kit have different settings that may help with my situation? Mine are 5 PSI start, 22 PSI max.
Current setup:
Stock IC
Stock Intake
AEM AI (water only) cold side
Triumph fast reacting IAT sensor
Average cruising temperatures (out of boost and after a cold start) around town are low to mid 50C, this is Bay Area so very temperate, ambient temps around 24C.
AI isn't setup to come on until 5 PSI, so unless I'm pushing the car, I won't get any benefits of AI BUT at the sametime, I am afraid to boost when the car was sitting at 76C (!!!) after a hot start. Once I got going, it started coming down but was still in the 60s until I got on the highway.
Any other people running the AEM AI kit have different settings that may help with my situation? Mine are 5 PSI start, 22 PSI max.
I am usually somewhere in the 40's during hard driving sessions. Pretty close to ambient... Especially considering I am adding another atmosphere of pressure to the air.
With a SMIC a duct extension is required to get any real performance gain. The reason V-mounts work so well is because they share the air coming in the bumper opening 50/50 with the radiator.
Look at the bumper opening with any SMIC. Why would the air enter that duct? It's tucked up in there and doesn't even interact with the air flow. Make the air go up in there!
Take a look at my results modifying the duct with the stock IC: https://www.rx7club.com/3rd-generati...temps-1070765/
11-25-19, 11:53 AM
#30
^ Yup, you have to modify the duct to help bring more fresh air in. It will help cool the IAT once you are in motion, but it can't help with heat soak. The configuration of a V-mount definitely help maximize the efficiency of the IC core to cool things once you are in motion, but IMO it is the position of the radiator and fans that made the most difference on heat soak. The fans are pushing hot air out from underneath instead of up to the IC and pipes, there are also more room for heat to escape when the car is not moving. In moderate traffic, I see about 10° bump in IAT with V-mount compare to 20° with the M2 setup.
No I didn't run a fan, I understand it might help battle heat soak, but to me that's just a bandit. With the M2 Large there isn't a whole lot of room left between the IC and the engine, adding a fan will basically fill the only open space in the already crowded engine bay, plus I have to add more wiring to trigger the fan. With the GReddy V-mount being few hundred bucks more than what I can get out of the M2 setup, it was a no brainer to switch.
Where you running a fan on the M2 large intercooler? Meaning, a small electric fan mounted to the rear of the IC to "pull" air through it just like the radiator fans do for the radiator? For SMIC setups, the duct is really only functional when the car is moving. Otherwise, it doesn't have enough exposed surface area to really get the job done. I think the fan helps a good bit with that when the car is stopped or moving slowly.
11-25-19, 12:47 PM
#31
^ Yup, you have to modify the duct to help bring more fresh air in. It will help cool the IAT once you are in motion, but it can't help with heat soak. The configuration of a V-mount definitely help maximize the efficiency of the IC core to cool things once you are in motion, but IMO it is the position of the radiator and fans that made the most difference on heat soak. The fans are pushing hot air out from underneath instead of up to the IC and pipes, there are also more room for heat to escape when the car is not moving. In moderate traffic, I see about 10° bump in IAT with V-mount compare to 20° with the M2 setup.
No I didn't run a fan, I understand it might help battle heat soak, but to me that's just a bandit. With the M2 Large there isn't a whole lot of room left between the IC and the engine, adding a fan will basically fill the only open space in the already crowded engine bay, plus I have to add more wiring to trigger the fan. With the GReddy V-mount being few hundred bucks more than what I can get out of the M2 setup, it was a no brainer to switch.
No I didn't run a fan, I understand it might help battle heat soak, but to me that's just a bandit. With the M2 Large there isn't a whole lot of room left between the IC and the engine, adding a fan will basically fill the only open space in the already crowded engine bay, plus I have to add more wiring to trigger the fan. With the GReddy V-mount being few hundred bucks more than what I can get out of the M2 setup, it was a no brainer to switch.
I don't know about you, but I spent about 1/2 to 1/4 the cost of a v-mount setup on my M2. There is also the value of your time. V-mount looks much more involved to install, especially while retaining A/C.
11-25-19, 01:47 PM
#32
No I didn't run a fan, I understand it might help battle heat soak, but to me that's just a bandit. With the M2 Large there isn't a whole lot of room left between the IC and the engine, adding a fan will basically fill the only open space in the already crowded engine bay, plus I have to add more wiring to trigger the fan. With the GReddy V-mount being few hundred bucks more than what I can get out of the M2 setup, it was a no brainer to switch.
PS: I'll be running a setup like that here in the next week or so. I live in Texas so I'm familiar with the heat.
11-25-19, 01:56 PM
#33
^ Not sure if there's more than one way to mount it, they are just pushed together with the IC rest on the x-bar like how M2 intended, I even have the TurboJeff x-bar.
Yes a slim fan will fit, there's enough room for a fan for sure. I didn't mean to say there's no room, just very packed. Hopefully your setup works out better for you than it did for me.
Yeah, I usually plan my route to avoid as much traffic as possible. I was able to recuperate 60% of the V-mount cost from the M2 setup sale, I did have the M2 large and CF intake, so that probably helped, plus I got the V-mount when they were on sale few years ago. Can't comment on the effort of the install as I did other maintenance item at the same time, and I'm not running A/C with either setup.
Yes a slim fan will fit, there's enough room for a fan for sure. I didn't mean to say there's no room, just very packed. Hopefully your setup works out better for you than it did for me.
Totally agree the layout of a v-mount is superior for the reasons you state. Fortunately I don't have to drive my FD in traffic... I feel like that would be soul crushing for so many reasons.
I don't know about you, but I spent about 1/2 to 1/4 the cost of a v-mount setup on my M2. There is also the value of your time. V-mount looks much more involved to install, especially while retaining A/C.
I don't know about you, but I spent about 1/2 to 1/4 the cost of a v-mount setup on my M2. There is also the value of your time. V-mount looks much more involved to install, especially while retaining A/C.
Last edited by ZE Power MX6; 11-25-19 at 02:06 PM.
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