Background:
Lately, I’ve been making steady progress with the MGM7 intake for use with the IS48 turbocharger. I’m interested in getting the GTI over for a dyno session with the IS48, but I’d like to see how the intake design performs before doing so, hence I have some extra motivation to get this version of the intake completed.
Due to the version of turbo I am using having a ported shroud, I’ve also had to develop a turbo inlet elbow. This has slowed progress on the intake a bit, but on the upside, there’s a chance to try and make a well-performing elbow that departs slightly from the conventional designs.
Testing the intake fit has been a focus lately, ensuring it clears the components in the engine compartment and that the hood can close without pressing down on the intake.
I’ve narrowed the intake diameter a bit, making it easier to fit and helping push towards a functioning product sooner.
For now, I am repurposing a Racingline intake housing to use with the MGM7 intake. This is also driving some of the design changes.
The intake is just about to a point I can be happy with for now, and the elbow is almost complete, with the PCV port needing a little more work.
Flow Test:
I checked the flow rate using the latest version and several previous versions that were made to work with the IS48 turbo inlet elbow.
The Beta-6 has some imperfections on the inside that I left in place, which might reduce airflow slightly compared to the other Beta versions.
The Beta-6 flows similarly to the prior versions.
Next:
I’m going to lower the air filter approximately 30 mm to increase the clearance with the hood, and I’m also going to try maintaining the inlet diameter further back along the airflow direction.
The larger diameter should help reduce pressure losses, but the inevitable convergence to the inlet diameter of the TIP could offset this due to the momentum changes that result from changing the direction of the airstreams.