PROSPEED NSX Cold Air Intake System

Prospeed Cold Air Intake System

Hi Primers,

We are proud to introduce a new and exciting product for the NSX.... The Prospeed Cold Air Intake System. Lately we have been testing a lot of NSX's and we noticed that the NSX pulls a considerable amount of vacuum and that is a sure sign of a restriction on the intake side. Since you guys know that we like to dyno test and improve on everything =) we decided to build a proper intake system and dispel some of the myths that the OEM intake box is the best out there.

One of the first things we wanted to do was to relocate the air filter away from the engine compartment. We thought about about relocated the filter to the intake duct in front of the rear driver side tire however the intake length was a little too short for our liking. We decided to go the opposite direction and relocate the air filter to the back rear fender. This was a great location because it allowed us to run a larger air filter while being protected from water and heat. By relocating the air filter away in the rear fender it allowed us to properly tune the inlet pipe length and diameter (Resonance Tuning). This produced some excellent results.


The Prospeed CAI made approximately 8-10whp from 5600 rpm to 7800 rpm. It also picked up approximately 5-6 ft lbs of torque at the same rpm.

The power is noticeable as you hit VTEC and pull to redline. Torque is felt instantly from the beginning.

Dyno: Dynapak
Car: 1991 NSX 5 speed with 183,XXX miles
Temperature was approximately 6-9 degrees warmer than the previous dyno session.

We dyno tested the NSX on the same day and within 30 minutes of each other to eliminate variables. We didn't do any tuning to the ecu. Just bolt on and dyno. We made 3 passes with the stock airbox and 3 passes with the Prospeed CAI.

-Stock Air Box is uneven dotted line
-Prospeed CAI is even dotted line


RESULTS:

Power and Torque


AFR's (No tuning was done and AFR's are nearly identical)


Vacuum readings (The Prospeed CAI is clearing less restrictive as it pulls less vacuum)



Why choose the Prospeed Cold Air Intake System?

-High quality grade 6061 aluminum for all piping (Carbon fiber is an option)
-Made in the USA 4 ply silicone hose connectors
-Made in use clamp connectors normally used for turbo piping
-Tuned length and larger 3.5" diameter piping
-Oil free high filtration and flow filter for maximum breathing.
-Improved sound
-Dyno tested and proven innovative design
-No extreme air fuel ratio changes to insure proper AFR's
-Performance ceramic coating as an upgrade (great for cooler temps)
-Carbon Fiber Top engine bay piping as an upgrade (great for nice engine bay)
-Completely bolt on and fully reversible
-Fender liner can be reattached
-Designed and made in the USA

Price:

For 91-05 NSX

MSRP $325 Intro Price is $295 for first 5 customers

Upgrades:

-Ceramic Coating $60
-Carbon Fiber Intake bay top piping $50


Here are the pics. Sorry for the picture quality, we will have high res pics up soon.

Top View


Bottom View

Interesting.....

Moses said:

Interesting.....

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That's it Moses? Hehe

an intake with proper dyno results??? hmm, sorry, i prefer pretty intakes with empty promises. :biggrin:

Congratulations on the fabulous dyno results.

This folks, is a GAME CHANGER.

There is room for improvement over the stock air-box. It just took the right design. Kudos to thinking about running the piping THAT way.

What filter was used in the oem airbox and was the oem intake scoop used for the test of the oem airbox?

Thanks L_Rao.... The OEM air filter was used. A fairly brand new one. I've swapped over k&n and UNI filters in the past in my airbox and noticed negligible gains.

I like to see new products for our old classic. Not to be party pooper but seeing the angle of the intake in the "top view" pic make me like i could do this myself. The b-Line and the dali python intakes have offset the tubing to make it a little better on the eyes.:smile: Just an opinion.

http://daliracing.com/v666-5/catalog/x-images/dali-python-intake.image.jpg

http://blinemotorsports.com/images/intake/nsx_intake2_site.jpg

Nice to have another CAI option. I like the fact that you still utilize the OEM coupler & your 3.5" pipe should increase flow rate, however, the air filter should have been position right on the side scoop so that you have a ram air affect. If you consider having this option later, make sure the air filter is slim so that it fits well in between that tight fender well & liner.
I will buy in a heartbeat if you opt for this too. :wink:

Timeless: there are 2 problems with the behind-the-scoop design:

1. (Very important) - this design only allows for about 21-23" total of pipe length (from filter to throttle body). I think the engine wants at least 32" of pipe length.

2. There is a very small selection of air filters that will fit in there, and it is questionable as to whether the ones that do fit in there have enough surface area. Plus, the small air filters definitely don't allow for a velocity stack to be integrated.

Ko-nsx said:

I like to see new products for our old classic. Not to be party pooper but seeing the angle of the intake in the "top view" pic make me like i could do this myself. The b-Line and the dali python intakes have offset the tubing to make it a little better on the eyes.:smile: Just an opinion.

http://daliracing.com/v666-5/catalog/x-images/dali-python-intake.image.jpg

http://blinemotorsports.com/images/intake/nsx_intake2_site.jpg

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I thought about that but I prefer to reduce the amount of welds, bends and materials used. In it's current form (length and diameter) it produces great proven power on an NA NSX. I would love to see this intake on a supercharged NSX... =)

L_RAO said:

Timeless: there are 2 problems with the behind-the-scoop design:

1. (Very important) - this design only allows for about 21-23" total of pipe length (from filter to throttle body). I think the engine wants at least 32" of pipe length.

2. There is a very small selection of air filters that will fit in there, and it is questionable as to whether the ones that do fit in there have enough surface area. Plus, the small air filters definitely don't allow for a velocity stack to be integrated.

Click to expand...

You are correct... Ram air is overrated IMO... With the fender liner attached the air goes through the duct and through the fender. Most importantly the filter is not getting hot air from the engine bay.

Prospeed said:

I thought about that but I prefer to reduce the amount of welds, bends and materials used. In it's current form (length and diameter) it produces great proven power on an NA NSX. I would love to see this intake on a supercharged NSX... =)

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Get me a 58psi RDX NA tune on your chip and let's make this happen! :biggrin:

RYU said:

Get me a 58psi RDX NA tune on your chip and let's make this happen! :biggrin:

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lol, It's not in the cards anytime soon right now. We went there and won't revisit it for awhile. We have other projects in the works like this intake system.

Prospeed said:

lol, It's not in the cards anytime soon right now. We went there and won't revisit it for awhile. We have other projects in the works like this intake system.

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bummer.. well CTSC NSXs are a dime a dozen here in Socal. I'm sure someone else will raise their hand.

I'd like to see a big bore TB and a port matched CTSC intake snout paired up with this intake to be honest..

RYU said:

bummer.. well CTSC NSXs are a dime a dozen here in Socal. I'm sure someone else will raise their hand.

I'd like to see a big bore TB and a port matched CTSC intake snout paired up with this intake to be honest..

Click to expand...

Don't worry bud... we will get there soon. =)

I would too and it will be in the works shortly!

I don't think ram air works. Cl65 captain has posted several times on the topic and you have to be at much higher speeds than cars travel to get any benefit. Looks promising though, Ross has valid points regarding practicality as does KO regarding aesthetics, IMHO. Glad to see your dyno results!

The last piece of the puzzle!

It is now possible to go PROSPEED Intake -> PROSPEE headers -> PROSPEED cats -> PROSPEED exhaust with RDX injectors and a custom tune.

Now there's a fast NA car. Who will be the first to put it together and show us the numbers?

Nero Tenebre said:

I don't think ram air works. Cl65 captain has posted several times on the topic and you have to be at much higher speeds than cars travel to get any benefit. Looks promising though, Ross has valid points regarding practicality as does KO regarding aesthetics, IMHO. Glad to see your dyno results!

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Once I get the high res pics and coating on it you guys will see how nice it looks. =) remember this pics above are the prototype for testing purposes. The ultimate goal in the end is to make more hp and to make it bolt on within the confined spaces of the fender. We believe we achieved that with this design. This is the first dyno I have seen yet that shows conclusive results. I have tested other filters and designs years ago and never showed more then a couple of hp tops.

Ross, Hey bud I know what you mean... and actually thought about that.... as far as wheel well issues the stock fender liner can fit in place to prevent rocks or excessive filter changes with minor modification the the fender liner. The piping is tucked up nicely in the fender =)

bngl3rt said:

The last piece of the puzzle!

It is now possible to go PROSPEED Intake -> PROSPEE headers -> PROSPEED cats -> PROSPEED exhaust with RDX injectors and a custom tune.

Now there's a fast NA car. Who will be the first to put it together and show us the numbers?

Click to expand...

Thanks, I don't offer headers but I am working hard to offer a complete package for the NSX that produces power.

Prospeed said:

Thanks, I don't offer headers but I am working hard to offer a complete package for the NSX that produces power.

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My bad, I thought you did. Let me check the settings on my time machine :wink:

Prospeed said:

Ross, Hey bud I know what you mean... and actually thought about that.... as far as wheel well issues the stock fender liner can fit in place to prevent rocks or excessive filter changes with minor modification the the fender liner. The piping is tucked up nicely in the fender =)

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What are the "minor modifications" required to the fender liner?

Prospeed said:

Don't worry bud... we will get there soon. =)

I would too and it will be in the works shortly!

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Waiting to see this one. Lots of CTSC owners here.

TURBO2GO said:

Waiting to see this one. Lots of CTSC owners here.

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Dave, if these types of modifications are made to the stock CTSC and if this frees up the flow as much on an NA as it will on the SC... you'll likely need to retune the RRFPR on the stock CTSC or just upgrade to some kind of piggyback or EMS. That's the only caveat I see for CTSC owners.

kuni said:

What are the "minor modifications" required to the fender liner?

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We are actually modified the piping so there are no longer any modifications. You can reattach the OEM fender liner with no modification now. Running the fender liner will prevent rocks,dirt and water from getting to the filter. :smile: