Motordyne M370 installed.

[UTAMAV]

I had the Motordyne Plenum installed today at Scarab Performance in Mansfield, TX. As always, thanks to Dan for doing quality work on a car that deserves it. Onto the install.....It is definitely bigger as it sits higher than the stock box, and the mods seem to be on the inside of the air box. Also to note, Motordyne is not using, or seems to not be using the stock Plenum for this mod, their box is slightly different than the OEM box. So here we go, just a few notes about the install....

1. There is a vacuum hose that runs from the back of the box to the front.....I should have snapped a picture but it was too short to run under the throttle body. We had to place it on top and hide it with the engine cover.

2. Also, there is an intake baffle on the right hand side of the car that will not bolt back on the the plenum. The bolt holes are not the same as OEM for intake baffles. It just kinda hangs there, a simple hose mod will fix the issue. Maybe Motordyne will consider this too.

Gains: I decided to let the ECU make fine adjustments for about a week before we take it back to the same mustang dyno. Also, I am trying to find a day that had about the same temperatures, air quality, blah blah, etc....I will dyno her next Tuesday or Friday to see what we get. I will post on this same thread my original dyno and the post motordyne install dyno.

Butt Dyno: I think I have gained around what is to be expected 15-20whp. You definitely feel the difference and it seems to pull harder and faster to redline. I did a 2nd gear "pull" at 4000rpm to get around a slow farm truck on the way home and broke her loose (TCS on). I definitely think, just by the feel of it....this mod was surely worth the bones I spend on it.

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[Motordyne]

The hose does not have to go over the plenum or around the TB.

They are assembled here with a zip tie on the hose to properly route the hose under the plenum. Its there to eliminate any confusion on how or where to route the hose.

NOTE: I can see from the picture the zip tie was removed and the hose is not routed under the plenum.

And yes, the small plastic piece you referred to in #2 is left unattached. It just moves to the side upon installation. Its not a problem.

[UTAMAV]

Thanks for the input motordyne. Just for schlitz and giggles, I decided to dyno the Z on a Dyno jet.....it was very interesting....I actually pulled the same numbers on it that I did on the Mustang dyno. (+5 whp, but +20 torque). So two questions

1. I know it's dumb to speculate, but doesn't that mean when I go dyno the car on the mustang dyno, I may show the exact same numbers as before the plenum install? Being that the dyno jet usually shows ~15% higher whp, of course.

2. Will a tune fix these possible low numbers? As it is possible with all these breathing mods, I could be running lean?

I understand it wasn't the same dyno, but generally speaking my concerns are legitimate. What do you guys think?

[DarkZide]

It can depend. Different weather conditions can really throw off one dyno from another. Also dynos can accept correction factors...so its possible the Mustang dyno was set to correct to "dynojet" numbers. I'd kinda doubt you are running too lean from this stuff. The ECUs in modern cars are pretty good about compensating for most N/A mods. You should have gotten A/F readings along with your dynos though, did they not do that?

[Glokwork]

It could be that, it's important to stay consistent by using the same dyno. To be honest I've heard there are really no gains with this mod, but possible gains with FI. A tune is worth a try and it's the best mod you can do anyway. I did all my breather mods and actually was running very rich before the tune and picked up 31whp on a mustang dyno from the tune alone.

[Methodical4u]

i've been on the fence about this mod on several occasions. I read some people pick up good mid range power, but then lose some of the top end. Tony makes truly excellent parts and the ART pipes should go down in history as one of the greatest things ever. The gains with the M370 just seem to be so iffy though.

[Motordyne]

Originally Posted by UTAMAV

Thanks for the input motordyne. Just for schlitz and giggles, I decided to dyno the Z on a Dyno jet.....it was very interesting....I actually pulled the same numbers on it that I did on the Mustang dyno. (+5 whp, but +20 torque). So two questions

1. I know it's dumb to speculate, but doesn't that mean when I go dyno the car on the mustang dyno, I may show the exact same numbers as before the plenum install? Being that the dyno jet usually shows ~15% higher whp, of course.

2. Will a tune fix these possible low numbers? As it is possible with all these breathing mods, I could be running lean?

I understand it wasn't the same dyno, but generally speaking my concerns are legitimate. What do you guys think?

1) Doing comparative dynos on different machines has very little comparative value.

You could drive to every dyno machine all across the country and they will all yield different numbers. Even if they were all Mustang dynos or all Dynapack dynos. They will all have a spread of numbers even if the car produces the exact same results every time.

Two different dynos will never have the same calibration. The best way to know your pre/post results is to test on the same dyno machine.

2) The dyno shop you went to may have (should have) measured your A/F ratio. You probably have the numbers on your last dyno sheet.

[Vapiano]

Is the second pic after the mod? I didn't realize that the stock engine cover would still fit?

V

[Motordyne]

Yes, the engine cover fits over the M370.

[UTAMAV]

Hey folks, just thought I would update this thread and give my impressions after having had the M370 Plenum installed for almost a week.

First, thanks to everyone for your input, it helped me understand exactly what was going on. I know that comparing dyno numbers to different dynos is almost worthless...going to the Dynojet was simply due to my impatience and perhaps impulsiveness . My overall impression of the Motordyne Plenum is this: I am very happy with the gains that I feel. The Z feels more "torqey" and passing on the highway is much more fun with it installed . The fit and finish was flawless.

At the end of the day I am happy with this modification for two reasons:

1. It feels good on the Butt dyno, and yes mine was recently calibrated. It makes passing on the freeway and burning extra gas that much more fun >.

2. The most important one: Customer Service with Tony. He spent nearly an hour today answering questions that I had about my install, explaining torque/hp gains on the dyno chart's, and other general performance aspects of my Z. He never made me feel as if I were wasting his time. Awesome company, awesome product. Thanks Tony for all the help with my install! You'll have my business again when it comes time to upgrade again.

[TypeOne]

Originally Posted by UTAMAV

2. The most important one: Customer Service with Tony. He spent nearly an hour today answering questions that I had about my install, explaining torque/hp gains on the dyno chart's, and other general performance aspects of my Z. He never made me feel as if I were wasting his time. Awesome company, awesome product. Thanks Tony for all the help with my install! You'll have my business again when it comes time to upgrade again.

You are a customer... that is how you should feel. You get what you pay for and customer service and support is by far the most important part IMO.

Good to hear!

[Methodical4u]

Originally Posted by UTAMAV

Hey folks, just thought I would update this thread and give my impressions after having had the M370 Plenum installed for almost a week.

First, thanks to everyone for your input, it helped me understand exactly what was going on. I know that comparing dyno numbers to different dynos is almost worthless...going to the Dynojet was simply due to my impatience and perhaps impulsiveness . My overall impression of the Motordyne Plenum is this: I am very happy with the gains that I feel. The Z feels more "torqey" and passing on the highway is much more fun with it installed . The fit and finish was flawless.

At the end of the day I am happy with this modification for two reasons:

1. It feels good on the Butt dyno, and yes mine was recently calibrated. It makes passing on the freeway and burning extra gas that much more fun >.

2. The most important one: Customer Service with Tony. He spent nearly an hour today answering questions that I had about my install, explaining torque/hp gains on the dyno chart's, and other general performance aspects of my Z. He never made me feel as if I were wasting his time. Awesome company, awesome product. Thanks Tony for all the help with my install! You'll have my business again when it comes time to upgrade again.

So your mustang dyno numbers are with the intake correct?

[Motordyne]

Originally Posted by UTAMAV

.. Thanks Tony for all the help with my install! You'll have my business again when it comes time to upgrade again.

Thank you David!

It was good talking with you. Always happy to help.

Tony

[TypeOne]

Originally Posted by Motordyne

Thank you David!

It was good talking with you. Always happy to help.

Tony

Tony,

Have you looked into over boring the throttle body inlets on one of the M370s? Do you think it is possible?

Check out my thread here:

Larger Throttle bodies...?

[Motordyne]

Yes. It is possible but there is very little material that can be removed before cutting into the manifold inlet gasket groove.

The more likely place where pressure drop can be eliminated is at the TB itself and even more at the MAF sensor choke point.