Quad throttle body (EFI) setup

15psi · rice boy Joined: 23 Jun 2003 Posts: 45

Has n e body done this before? Im sourcing 4AGE 20-valve quad throttles, Im trying to get a custom inlet manifold made up to fit the quads, Im thinking of getting 550cc (13bt) injectors for it as well as a VL turbo fuel pump and malpassi fuel reggie!! Its all going on my g200w! I know i am going to have to match port them (port and polish head, reground cams, sports exhaust and extractors) but other than that it should be a sweeet lil street setup!

FLYINLoW · backyard mechanic Joined: 08 Oct 2001 Posts: 924

if u get this setup finished can u let me know and how much cause i might hit u up for one for my g200w

Adam · Site Admin Joined: 04 Oct 2001 Posts: 682

I would have thought that 550cc injectors would have been complete overkill on a NA G200... As far as injectors are concerned bigger isn't better

15psi · rice boy Joined: 23 Jun 2003 Posts: 45

I was thinking injectors out of a 4ZE1, but i was told to go some 13bt injectors. I think they are way to much for a 2L n/a as well. Or i could go normal injectors...

15psi · rice boy Joined: 23 Jun 2003 Posts: 45

Actually while i think about it. FLYINlow, how much did u get ur engine for? Did it come with a 5speed as well?? I just gotta wait for sum replies to get this quad throttley thing happenin!!!

Sparrow · tinkerer Joined: 08 Oct 2001 Posts: 171

where's the best place to measure Air Flow or Manifold Air Pressure from across four throttle bodies ??

Tex · tinkerer Joined: 13 Feb 2003 Posts: 163

If you search E-Bay you can pick up quad throttle bodies to suit the 4AGE-16 valve for around $1600, you could cut and weld an old 4A intake manifold as its the same as the 4AGE.
would be a sweet set up!

S N 3 A K Y · tinkerer Joined: 18 Jul 2003 Posts: 153

If the set-up is injected with a plenum, then a M.A.P sensor can be tapped into it to read absolute pressure.
On the other hand, an M.A.F meter can be wired and instaled into the plumbing tract leading to the plenum encased throttle bodies (but before a turbo if fitted).
If the set-up doesn't utilize a plenum and simply has four sock type air-filters fitted, then i'm not sure what the dealio would be there. I'd assume the computer would be reading in an open loop style configuration leaving out the reading for air flow &/or absolute pressure, but i'd highly doubt it. I'd imagine that some sort of 'hot-wire' air flow sensor would be fabricated to suit. I couldn't see the computer adding fuel according to only T.P.S, revs, and an O2 sensor.
Me thinks there is an area just aft the throttle bodies like the inlet runners or so-forth that a M.A.P sensored set up can be configured.
On the other hand an easier approch would have it so that the wires for air flow readings could be positioned right B4 the butterflies of each TB.
Interesting querey, could someone with experience please shed some light ??

S N 3 A K Y

Ben Wight · backyard mechanic Joined: 04 Oct 2001 Posts: 946

550cc injectors, thats crazy on an NA engine, they support about 400hp, whereas a decent G200W would make 150-200hp. 300-350cc injectors would be more the size that you should chase, easier to tune at idle/low load/low rpm.

philmelvin · rice boy Joined: 22 Jan 2003 Posts: 13

go to www.toymods.org.au to find quad throttles,
u can get them for like $200-$300 not $1600, does that $1600 come with free 20V as well