Sport-injected
Senior Member
- First Name
- Scott
- Joined
- Jun 2, 2019
- Threads
- 121
- Messages
- 3,294
- Reaction score
- 4,892
- Location
- Central Jersey
- Website
- www.youtube.com
- Vehicle(s)
- 2019 Civic Si, 2006 Saab 9-3 Aero
- Build Thread
- Link
- Thread starter
- #1
While researching this throttle body I came across many posts saying this is not a good idea, or it will idle/run bad or it's bigger than intake manifold so will decrease performance.
After having this throttle body installed for a month driveability is exactly the same as stock, idle is perfect. Install was straight forward, one nice thing about this throttle body is there is no hot coolant running though it. On previous cars I did this with a Barbed union anyways, the cooler you can keep the air the better as we all know. This is the 58mm throttle body, stock size is 56 at the inlet tapering to 50mm at the outlet. As far as the intake manifold being smaller, the manifold gasket is the same size as the throttle body opening so the 1-2mm lip on the inside of the gasket does make the opening smaller than the throttle body, but since the manifold is teardrop shaped part of the opening is larger than the throttle body. So to me this is not a restriction in the airflow after throttle body.
When upgrading the intercooler piping to larger size the stock throttle body is the next restriction so I upsizing the throttle body is only going to help with airflow, especially if you have bigger turbo which I plan to do in the near future.
As far as performance I installed this at the same time as my prl intercooler kit so I definitely noticed improved performance. How much of that increase was result of the throttle body I do not know.
I just wanted to post this so people know this can be a beneficial upgrade and I did not experience any negatives. The more you can decrease resistance in airflow the more efficient your turbo can run.
Hopefully this is useful information to some of you. Thanks for reading.
After having this throttle body installed for a month driveability is exactly the same as stock, idle is perfect. Install was straight forward, one nice thing about this throttle body is there is no hot coolant running though it. On previous cars I did this with a Barbed union anyways, the cooler you can keep the air the better as we all know. This is the 58mm throttle body, stock size is 56 at the inlet tapering to 50mm at the outlet. As far as the intake manifold being smaller, the manifold gasket is the same size as the throttle body opening so the 1-2mm lip on the inside of the gasket does make the opening smaller than the throttle body, but since the manifold is teardrop shaped part of the opening is larger than the throttle body. So to me this is not a restriction in the airflow after throttle body.
When upgrading the intercooler piping to larger size the stock throttle body is the next restriction so I upsizing the throttle body is only going to help with airflow, especially if you have bigger turbo which I plan to do in the near future.
As far as performance I installed this at the same time as my prl intercooler kit so I definitely noticed improved performance. How much of that increase was result of the throttle body I do not know.
I just wanted to post this so people know this can be a beneficial upgrade and I did not experience any negatives. The more you can decrease resistance in airflow the more efficient your turbo can run.
Hopefully this is useful information to some of you. Thanks for reading.