Prospeed Big Bore Throttle Body Service

[Prospeed]

PROSPEED BIG BORE THROTTLE BODY SERVICE!


Hi Guys,

We are proud to offer another item for the NSX. We've offered throttle body services for Civic, Integras, Preludes and S2000's for over 8 years. We now offer the big bore service for the NSX. All our throttle bodies are cleaned TPS sensors removed and bored with a taper. We can taper the throttle body and bore it out up to 4-5mm. We than replace the factory plate with a precision machined brass plate. This helps prevent the common sticking of the thottle plate that most big bore throttle bodies have. After machining the sensors are recalibrated to insure proper sensor readings. The service takes 3 to 5 business days plus shipping time back to you. You will need to ship your throttle body for the service or if you are local to the Southern California area you can drop it off to us.

We recommend port matching your manifold to any throttle body size increase to maximize gains. We also offer that service. PM me for details.

The extra flow makes this is a great mod for naturally aspirated NSX's and especially for forced induction (Turbo/Supercharged) NSX's.

Years:
91-94 NSX $239 shipped (Cable)
95-05 NSX $259 Shipped (Drive by wire)

Free shipping to anywhere in the US.
International shipping available.

PM me for information and orders!

Below are pics of our throttle body for the B-series engine.

NSX C-series engine throttle body

Stock TB below

 

[Semnos_NSX]

Re: Prospeed Big Bore Throttle Body Service!

Looks like a good product.... do you have any dyno proven gains for a FI NSX?

 

[Dhalsim]

Re: Prospeed Big Bore Throttle Body Service!

Interested but also would like to see some dyno info for non FI......

 

[KooLaid]

Re: Prospeed Big Bore Throttle Body Service!

Interested but also would like to see some dyno info for non FI......

In the past from other venders, there's negligible gain for NA in terms of hp, gains were in throttle response.

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

We will post up FI Dyno graphs soon. The test vehicle has our Prospeed Turbo Kit. We planned to do a before and after with the manifold being properly port matched to the Prospeed Big Bore Throttle Body.

I agree there hasn't been much gain but I believe it has to do with most NSX owners not port matching their manifold to the larger diameter throttle body. We've tested a big bore throttle body 10 years ago on a b18c gsr engine and saw no gains until we opened up the gasket and port matched the manifold. We saw 4-6 hp throughout the powerband with the increased throttle response. The most gain will be realized on a forced induction application.

 

[baynsac]

Re: Prospeed Big Bore Throttle Body Service!

How much would it be to port match the throttle body?

 

[baynsac]

Re: Prospeed Big Bore Throttle Body Service!

Is this thread dead? How much for the throttle body port matching service?

 

[evof575gtc]

Re: Prospeed Big Bore Throttle Body Service!

I need one for sure!
maybe 2 or 3 for the 3.8L guys too.

the stock throttle and intake manifold stinks.
it's always been the bottleneck robbing power.
the NSX motor starves for air and this is perfect.

 

[ediddynsx]

Re: Prospeed Big Bore Throttle Body Service!

To get your intake manifold extrude honed it runs about 600 with you bringing it in. Don't forget the port and polish job on the heads....after everything said and done its gonna cost a pretty penny.

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

If you wish to have the gasket and intake manifold port matched for the big bore throttle body it will be $225. It will be perfectly port matched to your throttle body. I will have pics up of the service in a few weeks.

As far as a full port and polish we offer Portflow Design cylinder head service. We have it for $1399 for both heads

Service includes:

disassemble/ clean/ inspection
port & polish
multi-angle valve job
deshroud valve area in chamber
polish chambers
surface deck
assembly

We will have our updated website up soon with more NSX products we offer and will be offering in the near future!

 

[lightguy]

Re: Prospeed Big Bore Throttle Body Service!

With AIM engine management would it have to be remapped to get any gains or would just the act of opening up the air supply take care of itself ?
Very good offer BTW. Dont see how you make $ at this price but who asked me :wink:

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

With AIM engine management would it have to be remapped to get any gains or would just the act of opening up the air supply take care of itself ?
Very good offer BTW. Dont see how you make $ at this price but who asked me :wink:

Yes, anytime you doing anything such as port and polish, cams, compression increase/displacement increase and even bolt ons it's recommended to make fuel and ignition timing adjustments. An AEM system would be able to make the proper adjustments. I plan to do a custom rom tune for bolt-ons and the big bore throttle body. I will have a before and after dyno up for all to see soon.

I want to offer reasonable prices for everyone. I'm not making a lot of money but I love this car and the community. So I guess it's worth it! :smile: Oh BTW the service isn't done in China! :biggrin:

 

[Frank Spano]

Re: Prospeed Big Bore Throttle Body Service!

Brian, will be contacting you in the fall for the throttle body and the head service. Frank

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

Let me know whenever you are ready Frank. Thanks!

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

UPDATE

Here is a throttle body we did for a fellow primer.

 

[enkrypt3d]

Re: Prospeed Big Bore Throttle Body Service!

Brian, do you have any cores for a 95 that I can swap with you? :biggrin:

And how tough is the install / removal? Thx!

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

Sorry, No 95+ cores available. I can have your throttle body done is less than a week.

The throttle body removal is pretty straight forward. Most novice wrenchers should be able to remove their air box, unplug sensors, disconnect vacuum lines and a few bolts. If you need help I can always help remove it for you.


Orders have been shipped out today!

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

Updated pics showing stock vs the Prospeed Throttle Body Service in first thread!

 

[stevenlee]

Re: Prospeed Big Bore Throttle Body Service!

What are the HP gains for a match ported turbo application?

 

[L_RAO]

Re: Prospeed Big Bore Throttle Body Service!

Any updates on this product/program?

Thanks.

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

I still offer this service but never really pushed it. It is a nice upgrade but port matching is highly recommended to maximizing horsepower.

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

A great mod if you're looking to maximize your N/A or Forced Induction build.

 

[Nero Tenebre]

Re: Prospeed Big Bore Throttle Body Service!

Bumpy this thread up to go along with the RDX injector discoveries and lets see some mild NA builds around prime :smile:

 

[Semnos_NSX]

Re: Prospeed Big Bore Throttle Body Service!

Have you encountered any issues with the Drive by wire cars? I was talking to SOS recently and they said they no longer offer Throttle body porting services on drive by wire cars because they were experiencing too many issues with the sensors.

thanks,

Steve

 

[Prospeed]

Re: Prospeed Big Bore Throttle Body Service!

Have you encountered any issues with the Drive by wire cars? I was talking to SOS recently and they said they no longer offer Throttle body porting services on drive by wire cars because they were experiencing too many issues with the sensors.

thanks,

Steve

Hi Steve,

We haven't had any issues with them yet on the NSX or on the K-series throttle bodies we do.