Custom 75mm Throttle Body

[TheBoz]

After my BBK Throttle body took a shit, my brother and I decided that we would build on that could handle the abuse that I was going to dish out. The Body is 6061 Aluminum, and the Butterfly and shaft are both 304 Stainless. The Rotor matches the stock rotor size, and the TPS Sensor is the stock one.

This is just Revision 1, we still have some changes we need to make to it. I need to find a better spring for it. Sometime the spring will bind and the throttle will slowly close. So after we have sourced a new spring this thing should be perfect.

We did some 25psi pulls on it last night and it held up great. We are going to continue beating on it to see if we can get it to break . however I dont think we are going to have any luck breaking it.

Let me know what you guys think.

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[white 90 gsx]

Where can we purchase that exact one u have?

 

[woooop]

i want one`to

 

[TheBoz]

After we have completed all of our testing we will run a batch of them. I want to make sure this thing can take 35+psi runs all day long and not have any issues. I want to beat it up and make sure that it still seals up 100%. I am tired of all the leaky crap out there so that is why we decided to just build our own. This thing love boost so far. Now we just need to get some good daily driving abuse on it.

I will keep everyone posted.

 

[Boosted98gsx]

What's the bolt pattern, and it needs an ISC provision

 

[1FAST2G]

I would machine in a lip on the end of the throttle to help keep IC pipes on. And maybe even make the lip a little wider for people using wide t bolt clamps.

 

[Car Cannibal]

Very nice, another issue to keep track of is the shaft seals leaking under big boost.

Do you have any shaft size comparisons stock vs yours?

Great job on stepping up for those having issues.

Also did you notice any boost creeping issues due to the freeing of any intake backpressure?

 

[gixrman]

Can you also machine it for a O-ring setup?

 

[Savage Talon]

It's a good looking part, can I recommend you machine a bead on the intake so people don't blow the couplers off if they don't run a standoff and brace.

 

[Boosted98gsx]

AND machine in a bung for a standoff / brace system

 

[TheBoz]

This thing is currently oringed, however I think we are gonig to swith to a real seal. This thing hold pressure right now with out any problems. As far as the cuppler staying on, I was running back to back 25psi runs on a t67/37r with a tbolt clamp and it never came off. We had planed to put a bead on it but this is our rev 1 test piece.

Thanks for the feed back, keep it coming.

 

[my98gsx]

Count me in i would buy that in a sec! let me know when you make enouph to sell.

 

[TheBoz]

Also I fogot to mention, this is on an AMS VSR intake Manifold. The specs were taken directly from a BBK 75mm application. This will not fit on a stock intake manifold. I supose we could make one that would bolt up to the stock manifold, I just dont know how big you can go on the bore. Let me know if there are any special requests, as we are in the process of designing rev 2 right now.

 

[JWoodley]

How about a 90mm with provisions for the stock sensors?

 

[Boosted98gsx]

How about a 90mm with provisions for the stock sensors?

+1 I'd be definitely in for this!

 

[bmoha2]

And no FIAV! For stock sized intake manifolds!

 

[Boosted98gsx]

And no FIAV! For stock sized intake manifolds!

Just get a 2g TB and block the FIAV, there is no need to make a completely new throttlebody for this. This is for people who need aftermarket tb's with larger valves for higher volumes of airflow but retain relative bolt-on-ability.

 

[Savage Talon]

As far as the cuppler staying on, I was running back to back 25psi runs on a t67/37r with a tbolt clamp and it never came off.

Thanks for the feed back, keep it coming.

Yeah but on E85 that is nothing, I plan on 30+ lbs of boost on E85 in the near future.

 

[TheBoz]

Yeah but on E85 that is nothing, I plan on 30+ lbs of boost on E85 in the near future.

Awesome, on what size turbo? I was considering running e85 however it is hard to come by out where I live.

The next rev of the TB will have the bead on it, it was in the plan for rev 1 however we had lots of other things to do so we left it for rev 2. Every version of this thing takes a good amount of time to machine, so you should test twice and cut once . WE have to run this thing through all the tests, so high boost is the plan, however I dont want to test at 600+whp on the first run, anything could happen. So start about 400whp and work your way up, that is how I test.

Also we have made a few little changes this week, and we are working on sourcing a new spring and adding the ISC.

 

[Boosted98gsx]

Also we have made a few little changes this week, and we are working on sourcing a new spring and adding the ISC.

WOOOT!

 

[JWoodley]

Any luck on a 90mm version?

 

[DoyoFCT]

looks sweet, i'd be very interested in seeing a final production of it.


hopefully the new spring works out.

and ISC provisions...

 

[TheBoz]

Why would you want a 90mm vs. 75mm? Are you guys running 3.5 inch IC piping?

The current spring is all good, I just want to get one that has a little more umph just to be sure at 35+psi.

I should have another revision in a few weeks.

 

[T9S1i]

Beautiful!!! keep the pics and info coming!

Very interested in one of these if the tests hold up!

 

[Boosted98gsx]

Why would you want a 90mm vs. 75mm? Are you guys running 3.5 inch IC piping?

The current spring is all good, I just want to get one that has a little more umph just to be sure at 35+psi.

I should have another revision in a few weeks.

Because a 90mm TB means no more need to upgrade, and you can bolt a 3.5" GM MAF onto it to laminate flow into the intake manifold, and eliminate the need for more than 1 expansion coupler in the intake system.