- Joined
- Oct 2, 2015
- Messages
- 3,565
- Reaction score
- 770
- Points
- 113
I know the main reason for the FMIC is to keep the Air Intake Temps low for performance improvements and engine safety, but these questions are more related to picking the right one?
Okay so I know from the threads that for my S3 when I get my FMIC that it's important the inlet and outlet are the same as the current 63mm I think.
In my simple mind I feel that if they are 51mm then it will generate extra heat on the inlet and I have expect loss of pressure on the outlet and if they are 76mm then it will cause loss of pressure on the inlet and extra head on the outlet? This might not be accurate but just feels right in my head, if you watch water in a river etc.
Say I get a 63mm 300/550/65 intercooler, when the forced induction starts it has to first fill this entire space up before exiting the outlet to go to the throttle body, so I assume this causes lag? Or is the often referred to lag, simply the fact if you are accelerating from 2k the turbo doesn't spin up until 3k so you have to drive 1k rpm on NA?
People say the turbo spins up quicker?
1. How can the air intake flow speed up when the turbo can start as that is initiated from the exhaust flow? Or is the fact there is less restriction than the dual SMIC the turbo has less work to do to push the air through the pipe work.
2. If it does spin up quicker you still have to wait for it to fill up the larger intercooler, before that air can get into the throttle body.
Maybe the above questions are simply nonsense and a turbo would fill this intercooler up in less than 200 milli-seconds
My only real concern is:
I am worried that with the current more restrictive airflow setup of the dual SMIC the torque is limited purely by the pipework and if I add a free flowing FMIC this might mean that the engine would be in danger (connecting rod wise) because more cold air can be delivered in a shorter period. Especially as I have a dubious map on a purchased ECU.
Thanks for any thoughts?
Okay so I know from the threads that for my S3 when I get my FMIC that it's important the inlet and outlet are the same as the current 63mm I think.
In my simple mind I feel that if they are 51mm then it will generate extra heat on the inlet and I have expect loss of pressure on the outlet and if they are 76mm then it will cause loss of pressure on the inlet and extra head on the outlet? This might not be accurate but just feels right in my head, if you watch water in a river etc.
Say I get a 63mm 300/550/65 intercooler, when the forced induction starts it has to first fill this entire space up before exiting the outlet to go to the throttle body, so I assume this causes lag? Or is the often referred to lag, simply the fact if you are accelerating from 2k the turbo doesn't spin up until 3k so you have to drive 1k rpm on NA?
People say the turbo spins up quicker?
1. How can the air intake flow speed up when the turbo can start as that is initiated from the exhaust flow? Or is the fact there is less restriction than the dual SMIC the turbo has less work to do to push the air through the pipe work.
2. If it does spin up quicker you still have to wait for it to fill up the larger intercooler, before that air can get into the throttle body.
Maybe the above questions are simply nonsense and a turbo would fill this intercooler up in less than 200 milli-seconds
My only real concern is:
I am worried that with the current more restrictive airflow setup of the dual SMIC the torque is limited purely by the pipework and if I add a free flowing FMIC this might mean that the engine would be in danger (connecting rod wise) because more cold air can be delivered in a shorter period. Especially as I have a dubious map on a purchased ECU.
Thanks for any thoughts?