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So I am starting with these:
($125, including the TPS and the injectors, they flow enough for a 165hp bike....)



The fit is amazingly close:



Here is a mockup of the bracket to help hold the TBs to the plate, hose and clamps will also be used, pretty much just like how it's done on the bike:

The injector spray pattern will work better if you could attach directly to the heads...
Hows the spacing to the ports directly?

Looks like a righteous combo. with some long injector stacks/runner plenum setup?

Piledriver wrote:The injector spray pattern will work better if you could bolt them to the heads...
Hows the spacing to the ports directly?

yes it would, however, not enough room in my 914 for that

I still might weld new injector bungs to the manifolds to get the spray closer to the valves....the centerline spacing is off by 1mm or less than 3/64s of an inch....not too bad....I can easily make them line up perfectly if I want due to the individual design of the TB's.....

Slick... How big are they each?
Thinking of a 1-3/2-4 dual plenum, setup, pair of 35-40mm would be about right.

The injectors on the T4 need to go in just about horizontal...

Too bad they don't fit, the 914 has plenty of room in that area, kinda surprising.

Piledriver wrote:Slick... How big are they each?
Thinking of a 1-3/2-4 dual plenum, setup, pair of 35-40mm would be about right.

The injectors on the T4 need to go in just about horizontal...

Too bad they don't fit, the 914 has plenty of room in that area, kinda surprising.

these are 45mm bores...recommended size by Jake for my new motor

I "could" just about bolt the TB's directly to the head, but getting decent aircleaners on them would be difficult....for a street car, the additional hp gained from it wouldn't be worth it.....I'm betting same for the location of the injectors, unless I throw it on a dyno I would never notice the difference for a daily driver

i have used this set up a lot .DO not put the throttle body on with that bracket use the rubber hose it come with this cut down on heat on the throttle body when it come time to tune the car you will not be unhappy with that set up
i use it for ford/ honda /nissan/ air and water cooled v dubs the secret is out
for air filters use trumpet socks
also good for turbo

That actually looks like a pretty good idea for TB setup. especially it it already has the tps.

what manifolds were you using?

Do you think there is a type 1 manifold that might work as well.

bug man nrg wrote:i have used this set up a lot .DO not put the throttle body on with that bracket use the rubber hose it come with this cut down on heat on the throttle body when it come time to tune the car you will not be unhappy with that set up
i use it for ford/ honda /nissan/ air and water cooled v dubs the secret is out
for air filters use trumpet socks
also good for turbo

I planned on running the phenolic spacers that are usually between the head and the stock runners....as for heat transfer I figure it should be no different than running Jeveys or TWM throttle bodies.

what manifolds were you using?

Do you think there is a type 1 manifold that might work as wel

not sure what brand, but i believe they are for weber IDF's???

CB Performance should have them for the type I

Looks like you can maybe use the fuel rails also. Just cut them down and tap the end for the fuel to pass through to the next rail.

hey there mueller

im in australia and i have just purchased the same T/B's, how are u goin with the linkages?

wot capacity si ur t4 motor?

I like Piledrivers dual plenum idea.
Throttle size would be determined by engine displacememt and HP.

Piledriver wrote: Thinking of a 1-3/2-4 dual plenum, setup, pair of 35-40mm would be about right.

Mueller,
Do you have any updates or additional pictures of this setup?
It looks great and I'd love to know more about it.

I ended up taking the easy way out on this project.....I milled off the top of the manifold and will simply clamp the throttle bodies directly to the manifold. I will have a bracket to align the t/b's to each other and will make another small bracket that'll go from the t/b's to the manifold to offer a little bit more support...and yes, the milled area is offset on purpose to match the inside profile of the throttle body...the injector will spray right on the backside of the valve

2 questions for you.

1) Why couldn't you just use a FI injected manifold?

2) What are you drilling?