I'm eagerly following this. Is there anything new to report on using the throttle bodies?

Is anyone doing custom work with individual throttle bodies?

If you do a google search, you might find the few sites showing adapting motorcycle t/b's to a 911 (not sure if completed or not), a few Hondas and at least one Neon

no progress to report on mine....

Hehe, first time I saw this thread.

Mike - Love the vintage, circa 1988 radio headphones

mike - you give up on this?

nope, still going to do it, just other projects ahead of this one....1st priority is getting my car running better, then the brakes , then ???? and then the throttle bodies

been a while since I've touched these parts...so this weekend* I'll be machining the manifolds by removing the material in red and cutting 2 pockets for the T/Bs to slip/rest into

once placed inside, I shall weld the T/Bs to the manifold, only negative things I can think of is that due to the manifold design, long studs will have to be used and installation of the T/B-manifold assembly to a motor already in the car might be a PITA

*(unless someone can give me a good proven reason not to )

why weld them on? bolt on or clamp on would be THE hot tip....

I have heard that the original motorcycle mounting is the same bolt spacing as an IDF? I mate has used a set of Suzuki Hyabusa bodies on his Alfa 2.0ltr powered sports car with great success.

no real reason for bolt-on or clamp on....usually attachment methods like that are for "universal" or more than one type of application (the manifold accepts a weber, a dell(?) or off the shelf throttle bodies such as Jenvey or TWM's)

doing it this way will just means that this assembly will only work with a Type IV motor (1.7/1.8 or 2.0 heads)

The TB's shouldn't need to be removed from the manifold, wrong size TB?? Well, sell these and buy new ones...manifolds are $50 to $80 per pair, not that big of a deal....

Even "if" the TB's need rebuilding down the line, they can still be taken apart..........

could be...it seems there is a "standard" 90mm bore to bore spacing for a lot of the throttle bodies

progress today...I decided no welding or brazing and no adapter plate....

I simply machined the top of the manifold and will attach the throttle body directly to it with a hose and clamp...this is a similar method to how the t/bs are held on on the motorcycle

with hose section

nicely done mike!

why did you choose the "shorty manifolds" over CB talls etc???

the hose clamp is a special clamp which is used in turbocharger applications, it has a true 360° hold on the hose....it's on there pretty darn tight, I'll still add a bracket to align each t/b to on another on a common manifold.

These are what I had, didn't know there are different options for the manifolds...oh yea, the cut is offset from the inlet on purpose, this matches the throttle body and allows the fuel injector to spray directly at the intake valve like the factory setup....it's a little further away, but I think it'll be fine...

Very cool Mike. That sure looks like fun.

Dave

Very cool Mike! Were watching you..

thanks....hard part is not tracking the "chips" back into the house

Hey Mike - is your CNC mill up and running now or are you still just jogging around with the keyboard?

full CNC operation(old PC running DOS program .....TurboCNC)....my G-code programming sucks, I have BobCAD which is kicking my tail trying to learn it...these cuts made with SimpleCNC

Glad to see this project coming back to life !

Just out of curiosity, what is that little hole in the outer side of the manifold ?

the plug is for a vac. fitting

Sweet, was waiting on a update for this, looks good.

Can't wait to see how it turns out!

Mike,

since the TB's are not rigid mounted, how do you plan to do a linkage between them? seems it will be pretty hard to sync if they are free to move up and down a little.....

I think he's going to add a bracket. Plus he's using a hose but it's so short there's only one clamp so I can see it being pretty tight. Hey Mike, is there enough material on the TB and manifold to machine it down for a V-band clamp? Then you wouldn't need to use the short hose at all.

I had the demo version of Bobcad - that thing is a bear to learn. More like a learning cliff than curve.

looked into it....I already bought the hose ($16 per ft), and don't want to spend too much time and effort on these...

here is them mounted on one side of the motor....

I screwed up, these manifolds are for 2.0 3-bolt heads...my motor is a 1.8 with 4-bolt heads, anyone want to buy these??

(2.0 head in picture is thrashed beyond repair and for mock up use)

ugly, but it'll work.....

mike, surely those manifolds have what looks like the bosses for the 4 stud 1.7/1.8 heads. You just have to drill them.

YES!!!
I have got to get those.
I am in the middle of working on the injectors on my 2.0
and have been debating making an attempt at this for a few days.
I will be the the 1st to say "Deal or no deal?"

mike if you dont sell these to Leo let me know what you will charge for the whole system

Bernie

I'm going to have 2 complete systems for sale since I doubt I'm going to use 1 due to my turbo install which would be easier with a conventional plenum/single T/B design.....

Mike,
Pardon me, I am going to show my total ignorance here. These are a great idea....but what FI system are you going to be using them with?
Would this setup work with a stock injection?

Nomex is now on....

imguessing MS or SDS

how about a set of those?

and to plug myself shamelessly, i do have a set for sale in the classifieds ...
Andy

They won't even fit on a 914!

hahaha


M

It almost certainly won't work with stock injection since the MAP (Manifold Absolute Pressure) profile will almost certainly be different due to the short intake runner and lack of intake plenum.

Sorry! It ought to work well with a megasquirt though - although might require some cleverness to get it to work well....

Mike,

Found an engineer/fabricator in Alviso, maybe time for lunch again...

Check out his turboed bug:
2110 Turbo VW engine
New fully prep VW race case
Cima Pistons
Straight cut gears
MSD Ignition
Forged 82mm stroker crank
T3 RayJay Turbo Charger
Bugpack Stroker Rods
Street Eliminator Heads 42X37
Camshaft 298X515
Kennedy 2500lb clutch W/4 puc Feramic disc
Large Oil Cooler
Doghouse Fan Shroud
Horsepower 300 @ 18 psi boost
42mm Dellorto side draft

Dan, to be used with aftermarket FI such as Megasquirt or Link FI/ignition* or Electromotive..........

*this is what I have on the car right now

A big thank you to non-member SpunOne

He made these spun aluminum velocity stacks for my throttle bodies...

As you can see there is some overlap which is okay, I'll mill off the offending material and butt weld the 2 together. For my applications, I doubt I'd be able to tell or notice any negative effects from doing this.

Oh yea....one stack tried to "escape"...and got "squished" underneath my Hyundia ...luckly Paul made 9

Click to view attachment
Click to view attachment
Click to view attachment

WHOOOOAAAAA glad ya got the extra one .Hope they work for ya

WOW those are some really nice lookin stacks if I must say so myself. Can't wait to see it all togeather good luck

That's what I thought , too. Just like the CB Performance manifolds that Andy shows in his photo. Those work with both three and four bolt heads.

there was an aluminum plug that popped right out with a little

Umm. Mike, you used a some rair Solex manifolds.

Looks cool. How many hours are in it right now?


B

overlapping stacks are very cool. Some 356 had them.

Michel