How much airflow Stock TMIC??

[88turboii]

i believe the stock tmic gets plenty of flow when you are moving at any reasonable speed. ive logged intake temps and they get pretty hot during boost, but then cool back down extremely quickly, within a couple seconds. I have the heat shield removed on mine though. but this tells me its not a flow problem, but more the stock IC does not have enough surface area to keep cool. im thinking increasing flow through the IC will not help as much as trying to increase the size the the intercooler. look at what REamemiya did with welding two cores together

[RICE RACING]

About 20 years ago I data logged all these sorts of question through my Autronic ECU in the first gen RX7, I was running a S5 motor with a 20B intercooler up front, I tested all kinds of things, and found out what my mate with the outrageous signature size is saying!

I still have the logs and software to see them, I need to take pics and post them up. I increased the efficiency of the intercooler a metric arse load by encasing it in a really sic scoop that hung out the front of the car, ( I have a track photo from 1994 showing the scoop!) this brought down the IC charge temp by over 20 deg C, the theory was the mass flow of air at pressure was being forced through the IC and not over and around it..... math is simple basic mass flow of air is acting to transfer heat from the IC core, higher flow rate of air and greater density = far greater heat exchange between the two.

TO give you an idea I went from 70 deg C charge temp to under 50 deg C (despite running more boost! and running in ambient conditions that were 15 deg C hotter!) at 240kmh in the top of 4th gear.

The stock top mount IC's can work good but you need a good hood scoop and a sealed bonnet at minimum. A water spray system helps no end as well cause at power levels over 400bhp (engine power) the charge temp will always be too hot as its just too small when air is the cooling medium. If you encase it in a water jacket then its a different story but that is a whole nother question and level of complexity.

[RICE RACING]

Originally Posted by 88turboii

i believe the stock tmic gets plenty of flow when you are moving at any reasonable speed. ive logged intake temps and they get pretty hot during boost, but then cool back down extremely quickly, within a couple seconds. I have the heat shield removed on mine though. but this tells me its not a flow problem, but more the stock IC does not have enough surface area to keep cool. im thinking increasing flow through the IC will not help as much as trying to increase the size the the intercooler. look at what REamemiya did with welding two cores together

On my water injection page the silver 1st gen RX7 (440rwhp vid) has an intercooler like that I made personally which consisted of two S5 intercoolers welded end on end and front mounted. It could take 26psi boost not a problem.