MSDS Intake Review

[jungspike]

Santa brought me a MSDS intake and cone filter. When I opened it, it didn't look worth the $150 Santa paid for it. However, I did data runs before and after installing using PerfExpert. The runs were performed at the same location separated only by a couple hours. The MSDS intake and filter seem to give me about 15 HP! Sounds too good to be true, but I'm happy. The stock airbox had a K&N air filter and some holes drilled in it. My car has 3.4L Max Moritz pistons, GT2 Evo cams, Bursch 1-5/8" headers, M&K 2-in 1-out. I did round off the beginning of the MSDS intake as SW suggests. I live at 6,000 MSL. Maybe more exciting than the HP gains is no longer cursing when trying to snap the rear clips on the airbox!

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[gliding_serpent]

Interesting. I am always attracted to 3.4l build numbers as a benchmark to my car. I have yet to dyno (or finish). I should have a similar end result as my specs look superficially similar, although with less aggressive 964 cams.

I am not familiar with the use of dyno apps, or their accuracy, but ballparking it, you have some gains for sure and are in the right neighberhood for power. If your car was very intake limited before, it only makes sense you would see more gains than a stock 3.2 might see with the same intake.

Here is my s&b filter as part of my S-Car MAF. The maf has a near three inch cross section. There should be no real intake restrictions here. My throttle body is 66mm also. Is your tb enlarged?

[gliding_serpent]

More info on expected gains and porting.

Originally Posted by Steve W

You can take a cone air adapter such as this one from MSDS Inc, and port out the the adapter as shown below, and with appropriate software it's good for about 7-10 hp over the stock airbox by itself. The porting part is important. Tested with an unported vs ported adapter was 5 hp at the wheels . Verified from lots of dyno testing on several 3.2s from stock to very modified.

[jungspike]

I haven't enlarged the throttle body, but I do have a honed intake, which might be useless if the most restriction is in the TB or AFM. So, I have been contemplating enlarging the TB, but I have heard that it is kinda like headers: larger diameter gives increase in high RPM HP, but smaller diameter is better for low RPM torque--not sure how true that is. I love the S-car MAF, but I think I am going to just get Sal's chip and injectors.

[gliding_serpent]

I am not sure about the high vs low hp thing. Probably makes sense for engines with stock/euro power. That being said, the 66mm TB has a 10% larger surface area. Your car has more than 10% increase in power from stock (or even euro) so I only see benefits for the larger TB in your case. Your displacement is about 6% higher, and that is more air need that is across the board.

The honed intake is of benefit to balance air flows to each cylinder. They also give extra flow obviously (not sure if they are actually flow limited for most motors however). Some argue (in my case, I spoke with an engineer who focuses on engine design) the honed walls in the intake reduce turbulence and thus air/fuel mixing. Sal's modern injectors will aid in air/fuel mixing (better fuel atomization) at low and medium air/fluel needs, and they should offset this theoretical issue. That being said, who knows if it is a significant (measurable) issue.