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Author Topic: Throttle bodies.  (Read 13485 times)
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tauruck
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« on: February 18, 2015, 11:00:41 PM »

I've been looking at throttle bodies.

Nothing available here in 101mm.

To import one at our current exchange (11.8:1) rate plus shipping is crazy. 4,500 bucks in our money.

I don't know much about them but they seem pretty simple to machine.

I have someone with CAD and CNC who could machine one from billet.

He's done a few already.

You all say the only dumb question...........

Go or no go?.


* Throttle body..jpg (45.28 KB, 1024x768 - viewed 149 times.)
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Peter Jack
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« Reply #1 on: February 18, 2015, 11:09:56 PM »

We built a 4" throttle body 30 years ago for an alcohol big block and it worked well. Forge ahead Mike.  grin grin cool

Pete
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kiwi belly tank
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« Reply #2 on: February 18, 2015, 11:45:55 PM »

Why do you want 4" throttle bodies on 351 cubes? A couple of GM or Ford bodies should be plenty big enough for your application.
  Sid.
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jl222
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« Reply #3 on: February 19, 2015, 12:18:20 AM »

I've been looking at throttle bodies.

Nothing available here in 101mm.

To import one at our current exchange (11.8:1) rate plus shipping is crazy. 4,500 bucks in our money.

I don't know much about them but they seem pretty simple to machine.

I have someone with CAD and CNC who could machine one from billet.

He's done a few already.

You all say the only dumb question...........

Go or no go?.

  I've got 2  of them packed away some where in the shop. Tried to use in front of centrifugal blowers but caused oil
to get sucked through seals.
 Their 4 inch and I have to look up how much I paid for a price. More to them than meets the eye,

 Could you explain that exchange rate? If something cost $100 U.S. it cost you $1180? If you made 11.8 times an hour
I guess it would be all right. How much is a beer grin

                 JL222

    
« Last Edit: February 19, 2015, 12:34:51 AM by jl222 » Logged
tauruck
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« Reply #4 on: February 19, 2015, 12:50:41 AM »

jl222, a beer would cost you less than $1.
All the tourists rate our beer as awesome.

 
A bottle of J&B would be $12.

A MT 30" LSR tire would cost me about 12 grand landed.
The importer charges about double the product value depending on weight vs volume.

Sid, I'' email you on that advice you gave.

Pete, as always you always put a positive spin on things and every time I heed your advice
I come out a winner. cheers
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Kiwi Paul
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« Reply #5 on: February 19, 2015, 01:02:24 AM »

Mike...Rich Fox (on here) has used T Bird Throttle bodies on his Four Bangers for years, and swears by them. He might be worth asking a few questions to as well. Although Sid`s head is so full of useful (less?) mechanical Knowledge, he`ll probably know where there is a free example of the setup you need, and he`ll know a cheap way to mail it to you.... grin
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kiwi belly tank
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« Reply #6 on: February 19, 2015, 02:05:16 AM »

LOL, I guess I've taken dumpster diving to a new level!  rolleyes
I have common rail Cummins throttle bodies on my liner with 130mm Garrett's & 600+ cubes. Removed the stepper motors & made a throttle arm for them.
Cadillac Northstar will be plenty big for ya Mike. Look at what you have in the junkyards down there, no need to be any bigger than the plumbing.
   Sid.
« Last Edit: February 19, 2015, 02:20:09 AM by kiwi belly tank » Logged
RichFox
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« Reply #7 on: February 19, 2015, 07:08:12 PM »

Ron's Racing makes a 4 inch TB and a 4.100. Around $1900 US at the factory. Largest stock TB I have ever seen is the Ford Lighting. But I don't remember how big. I bought and sold one for $100. I don't see why you couldn't make your own. I made a rectangular TB for the Nissan V6 we had in Jacks 788 car. Fit under the shell Easy to make. Jack makes TBs all the time.   
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tauruck
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« Reply #8 on: February 19, 2015, 09:50:54 PM »

We have a scrap yard here called Denver Truck.
I'll go have a look and take photos as well.
You guys will be shocked at the amount of wrecks.
You'll think to yourselves that there can't even be that many trucks in SA!.

If I had Sid to go with me it would be easy to locate said TB.
Sid I know you're a Dodge recluse as well but you need to come down to the
Southern Hemisphere again. We'll really look after you here. grin

I don't even know what to ask for. Sid, give me a starting point please?.
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kiwi belly tank
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« Reply #9 on: February 20, 2015, 12:18:04 AM »

First off, what size tubing are you using for your cold pipes? So long as the TB's are that size or a little larger they will be good. Anything V6 or V8 should be a prospect, some of the older Volvo & Saab turbo's had a big muther on them too. If the cold pipes aren't any bigger than 2 1/4" id, you might want to look at an EFI 460 Ford. They have a two barrel TB that would be as slick as snot & you wouldn't have to phuck with linkages plus they have a TPS & IAC built in. You don't really need an IAC, you can set up idle on the stop adjuster for a race application.
What are you doing for the manifold, you doing a 4 barrel & a transition or the bottom of a tunnel ram or WTF? grin huh
  Sid.
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tauruck
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« Reply #10 on: February 20, 2015, 12:45:28 AM »

We don't have any big block EFI Fords here. This is Africa.
The only V8s here in quantity are Bavarian Murder Weapons and MB.

My cold pipes are 92mm ID and the manifold is a custom unit we're
busy on that runs 16 x 2200cc Bosch injectors. Don't ask. rolleyes shocked

My turbo guys are supplying the shopping list and I'm having stuff machined according to the
requirements.
I was thinking a collector going into a single TB.

Buying spares here from wrecking yards these days is a joke.
They want to sell the whole motor so getting a TB on its own won't happen.

I'm going to ask my mate Kyle about TBs, maybe he's got a solution.

Thanks Sid. cheers cheers cheers
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kiwi belly tank
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« Reply #11 on: February 20, 2015, 01:26:23 AM »

A problem you "might" run into with twins feeding a single TB & tall gears in a liner, is compressor surge creating a cold pipe pulse. This can stall one compressor then the drive pressure will bring it to life again & stall the other one & now they are fighting each other& the engine becomes a pig. Running two seperate systems to the pressure box prevents this. If you're running small turbos & gating them off early, it probably won't be a problem for you.
It's not an issue with drag racing or boats where thay go right to the top end of the rev range & stay there.
  Sid.
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tauruck
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« Reply #12 on: February 20, 2015, 01:58:51 AM »

OK, two TBs it is. I'll find something and show you before I buy (build).

Thanks Sid. cheers
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Peter Jack
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« Reply #13 on: February 20, 2015, 08:39:14 AM »

Two throttle bodies with effectively one into four for each one should give you easier availability and fabrication and better distribution of the mixture into the engine. Sounds like a win, win ,win to me!  grin grin grin

Pete
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tauruck
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« Reply #14 on: February 22, 2015, 10:09:39 AM »

Pete, I can be a very funny guy sometimes!!!.
In this case I'm A CLOWN. Barnum & Bailey certified. grin grin grin

I was measuring the turbo inlet........  huh

The side I should have measured is 80mm and there are TBs available here.

I started fabricating a plug for the top of the plenum.
If I get this right the SCTA/landracing.com will have to give me a cap of some kind.
Maybe Black and Blue?Huh?.

The tie in between the manifold runners, venturis, plenum base and fuel rail will
boggle the minds of all those European designers with no respect for the poor
fool that has to work on the stuff.

I'm up against it here.
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