Technical differences between Magnusson and Edelbrock?

[dcmdon]

This is really just a curiosity. I was going to send PM to DaveCS with this question, but then found that there wasn't really any discussion or description on this topic. So while you can read up on the differences between a Ripp and a Magnusson for days. There isn't much on this topic.

What are the engineering differences between Edelbrock and Magnusson.

How do these differences impact:
1) power
2) reliability
3) serviceability


Its interesting because they both use the same compressor core. So the differences are really in the supporting components.

Lets ignore stuff like
1) the quality of the factory tune
2) warranty
3) ease of installation / quality of instructions

for now.

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[dcmdon]

Not a single response?

Nobody cares or nobody knows? Ha.

 

[DAVECS1]

I don't think they use the same compressor unit. The Edelbrock uses a 1900 and the Magnuson uses a 2300. When I first started doing this, I would of thought the 1900 would be more than plenty, and the 2300 overkill. As I work with this tune. I am finding that not to be the case. While 2300 seems excessive, it actually works extremely well with the VVT the 3.6L has to offer. Having the additional flow at low RPM allows you to dump boost throught the exhaust and actually cool the cylinders. Killing the intake heat at this early stage keeps it level for the rest of the run.

To boot what I am finding is using the additional boost provkes cylinder scavenging at higher RPM. I think this is why the smaller pulley makes a big difference. This engine is extremely happy with 700-1100 grams of air per combustion event. It takes a fair bit of displacement to generate that, and the Magnuson seems to have that.

To boot the water to air intercooler setup is the first one I have not felt the need to upgrade on any kit. With the air throughput and the sizong of the heat exchange with proper VVT tuning it is very plausable to keep the engine in the right temperature range indefinitely while under load. That has been my experience so far.

When I first installed it, the Magnuson it was not set up to operate how I am discussing.

I have not seen but one Edelbrock setup. My guess is they have also set it up conventionally, and it operates better this way because it does not have as much additional flow and as such does not disrupt the boundaries of the original control when it comes to airflow. I would beed to look at additional data logs. Ots cooling core is smaller also, but again it is flowing less air.

 

[dcmdon]

When you say dump boost through the exhaust.

Are you talking about leaving the exhaust valve open a bit to increase overlap so the intake air blows out the exhaust?

Isn't this an air/fuel mixture? (the pentastar is port injected, not direct injected, right?)

If you dump fuel out the exhaust valve can't you overheat the cats, or is this another thing you need to take into account with a tune?

Thanks.

Also - I was under the incorrect impression that they both used the same sized eaton internals.

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