Intakes for the Twins...Opinions please...
If possible I would have an intake with separate fresh air paths for the turbo intake and intercooler. That is what Mazda did with the '99+ cars. That was so the turbos sucking huge quantities of air won't pull air backwards through the IC, or at a minimum stop airflow to the IC. Stopping air flow or pulling air backwards through the intercooler turns it into an inter-heater. That is the problem with PFS intakes and the old Racing Beat ducts.
For the original poster, with a hot-air intake and a stock IC, you'll need to get as much airflow through your IC as possible. I would plug that hole in the IC duct and maybe do something to increase IC airflow like adding a bigger scoop onto the end of the IC intake or putting a fan on the back of the IC (or if you can pay the exorbitant prices, get an aftermarket IC and duct).
As far as plugging the battery ducting, I would only do it if your A/C is removed (and therefore the A/C receiver is no longer in there). IMO, it is more important for A/C than for the battery, since heat soaking the receiver will reduce A/C efficiency.
For the original poster, with a hot-air intake and a stock IC, you'll need to get as much airflow through your IC as possible. I would plug that hole in the IC duct and maybe do something to increase IC airflow like adding a bigger scoop onto the end of the IC intake or putting a fan on the back of the IC (or if you can pay the exorbitant prices, get an aftermarket IC and duct).
As far as plugging the battery ducting, I would only do it if your A/C is removed (and therefore the A/C receiver is no longer in there). IMO, it is more important for A/C than for the battery, since heat soaking the receiver will reduce A/C efficiency.
Joined: Jul 2001
Posts: 793
Likes: 1
From: Mascoutah, IL
I had interpreted the intention of your original statement "cooling the air before going to the turbos is pointless" to mean "[feeding the turbos as cool a supply of air as is possible] is pointless". I see that this was not your intended meaning.
-James
-James
AntiSUV - Putting a piece of metal between the intake and the rad is not going to make a noticeable change in either power, or IAT. Between being compressed , and absorbing the residual heat from the exhaust side, it is going to stay a consistent temperature. It's not magic, it's thermodynamics.
Oliv - Again, 1 or 2 degree temp drop is not going to affect the density enough to matter.
FD3Smaniac - A proper heat shield, ducted with fresh air, does make a difference. That is why they're popular.
Anyways, I should have worded it better. Adding anything but a proper box/heatshield with ducted fresh air to those intakes is pointless and a waste of time.
Oliv - Again, 1 or 2 degree temp drop is not going to affect the density enough to matter.
FD3Smaniac - A proper heat shield, ducted with fresh air, does make a difference. That is why they're popular.
Anyways, I should have worded it better. Adding anything but a proper box/heatshield with ducted fresh air to those intakes is pointless and a waste of time.
Last edited by antiSUV; Jul 27, 2008 at 11:35 AM.
AntiSUV - Putting a piece of metal between the intake and the rad is not going to make a noticeable change in either power, or IAT. Between being compressed , and absorbing the residual heat from the exhaust side, it is going to stay a consistent temperature. It's not magic, it's thermodynamics.
Oliv - Again, 1 or 2 degree temp drop is not going to affect the density enough to matter.
FD3Smaniac - A proper heat shield, ducted with fresh air, does make a difference. That is why they're popular.
Anyways, I should have worded it better. Adding anything but a proper box/heatshield with ducted fresh air to those intakes is pointless and a waste of time.
Oliv - Again, 1 or 2 degree temp drop is not going to affect the density enough to matter.
FD3Smaniac - A proper heat shield, ducted with fresh air, does make a difference. That is why they're popular.
Anyways, I should have worded it better. Adding anything but a proper box/heatshield with ducted fresh air to those intakes is pointless and a waste of time.
Thread Starter
Don't speak anymore...
Joined: Jan 2006
Posts: 471
Likes: 0
From: Tally-No, FL
Honestly guys when boost kicks in you hear a massive amount of air being sucked in. I can tell there is a difference in Lag when boosting also. Way different than the stock airbox. True I am still looking at areas that may need to be closed off to get a better airflow to the engine bay. Thanks for the input. I'll try to get some audio for you guys tonight.
a little info and test results on intakes here:
http://www.fd3s.net/intake.html
More from the Archives here:
https://www.rx7club.com/showthread.p...ghlight=intake
http://www.fd3s.net/intake.html
More from the Archives here:
https://www.rx7club.com/showthread.p...ghlight=intake