Throttle Body Tapering

[DV8]

Been chatting with a couple of my mates who are mega talented engineers and have access to some serious metal machining equipment about offering this service to people on here.

If we have enough interest they could offer TB tapering for £50 + P&P (to return the TB to you after it's done)

If anyone's keen or has any questions please let me know here.

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This is something that Spoon do to their throttle bodies (basically they buy an OEM TB and then taper/knife edge it for better flow) Here's the blurb from spoon:

Spoon Sports throttle bodies are genuine Honda manufactured assemblies with a difference. Spoon use brand new genuine Honda units and with years of R&D, taper machine the bodies for maximum flow.

The taper design (venturi) is adopted to increase speed of air flow as it enter the inlet manifold causing less restriction, turbulence and thus producing more power, especially in the higher end of the rpm range.

TB Fitted to the Jig:

The TB's are bored in stages to ensure just the right amount of material is taken off:

After Boring:

Next they are thoroughly cleaned and inspected:

Ready to go back on the car:

Definitely notice improved Throttle response but sadly don't have a dyno to re-tune or give any hard numbers.

Pretty much ready to go for EK9 TBs if anyones keen drop me a PM.

 

[tama666]

very nice to offer this service, very good price too.

 

[robbieD]

Is a very good offer!

Do you know how long it would take to get it back? i.e. 1 day for Tapering and a couple for shipping?

 

[DV8]

Is a very good offer!

Do you know how long it would take to get it back? i.e. 1 day for Tapering and a couple for shipping?

Roughly yeh, may need a couple days buffer just in case other jobs are on...

We could also try an exchange program but normally everyone prefers to have their nice clean TB's back that they sent in...

 

[Sid-ek9]

I got a dc2 one which I could possibly send down

 

[robbieD]

That was going to be my next question as I would prefer to have the original TB back.

I guess it would be best to send a bare TB with no senors etc?

When do you think your mates will start to do this?

 

[DV8]

I got a dc2 one which I could possibly send down

Hi Mate, we will need an EK9 one for starters to set up the Jig - once's that's done we can adjust for DC2 ones though (from memory they are slightly bigger arn't they?)

That was going to be my next question as I would prefer to have the original TB back.

I guess it would be best to send a bare TB with no senors etc?

When do you think your mates will start to do this?

Up to you really - if you remove the TPS it will need setting up again when you get it back. The other sensor can come off no worries and should do anyway to protect it.

Start this soon hopefully depending on interest.

 

[TheBooosh...!]

Ahh this is a great idea!

I would be interested in this, seems like a fair price to me

 

[robbieD]

Cool, Well defo interested in this!

 

[Sid-ek9]

Hi Mate, we will need an EK9 one for starters to set up the Jig - once's that's done we can adjust for DC2 ones though (from memory they are slightly bigger arn't they?)

Yep IIRC they're 2mm bigger. Well...whenever you can get it adjusted...gimme a shout. Deffo up for this spesh at that price ;-)

 

[DV8]

Ahh this is a great idea!

I would be interested in this, seems like a fair price to me

Cool, Well defo interested in this!

Yep IIRC they're 2mm bigger. Well...whenever you can get it adjusted...gimme a shout. Deffo up for this spesh at that price ;-)

Cool guys - well prob best bet is to get a list going (I won't hold anyone to it - if we get enough numbers then we'll make up a jig.

Also thinking of the jig we will need an EK9 TB for around a week to make up the jig (after that it should be a 3 day turn around) - anyone got one lying around during a rebuild that is keen to get this done that can leave it with us for longer to make the jig?

1. TheBooosh...!
2. robbieD
3. ek9ctr

 

[fez]

Does the butterfly stay the same size?

 

[seanek3]

1. TheBooosh...!
2. robbieD
3. ek9ctr
4. Seanek3

 

[oscarsayco]

does the butterfly stay the same size?

^^^x2 ?

 

[DV8]

Does the butterfly stay the same size?

Yes, the diameter at the point of the butterfly stays the same.

What we are offering is a taper on the approach to the butterfly for better airflow. At the end of the taper the edge is close to knife edged offering a smoother path for the air where it connects to the inlet system (inlet hose).

 

[ek9jim]

great service where is this going to be done m8

 

[GramsN1]

Im sure you already know, but just incase - seeing as you referenced the Spoon Throttle Body in your first post, the Spoon one's do actually use a bigger butterfly to.

I just sold a new Spoon DC2 Venturi Throttle Body last week, otherwise you could of used it for reference/measurements!

 

[fez]

Yes, the diameter at the point of the butterfly stays the same.

What we are offering is a taper on the approach to the butterfly for better airflow. At the end of the taper the edge is close to knife edged offering a smoother path for the air where it connects to the inlet system (inlet hose).

What sort of gains will be acheived?
I'm guessing better throttle response, will any dyno results be put up?

Thanks

 

[DV8]

Im sure you already know, but just incase - seeing as you referenced the Spoon Throttle Body in your first post, the Spoon one's do actually use a bigger butterfly to.

I just sold a new Spoon DC2 Venturi Throttle Body last week, otherwise you could of used it for reference/measurements!

What was the bore diameter at the exit point on the TB you had then - just out of interest? I always thought they were only taper bored up to the butterfly but have no probs with being proven wrong

 

[DV8]

What sort of gains will be acheived?
I'm guessing better throttle response, will any dyno results be put up?

Thanks

Couple of BHP at best and better throttle response - having such a large ridge really cant help air flow tbh.