Name this TBI :)
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Joined: Aug 2003
Posts: 364
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From: institute, wv
Car: 91 RS
Engine: LO3
Transmission: T-5
Qjet?
come on guys a Qjet dont even come close to resembling a holly of any type that i am aware of and carb are all i know right now. im from wv we know carbs. but im ready for fuel injection! d@#n cant get my smillies to work.
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Junior Member
Joined: Aug 2003
Posts: 63
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From: Forest Grove OR
Car: 91 Firebird
Engine: 305 tbi - 122k
Transmission: 5 speed
The smilies don't show up in the subject line. 
It's just two standard tbi carbs. After much consideration I've deduced that I can't duplicate the idle mixture valve

It's just two standard tbi carbs. After much consideration I've deduced that I can't duplicate the idle mixture valve
Senior Member
Joined: Oct 1999
Posts: 6,621
Likes: 2
Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
I'll give you ALL a big hint.
Try cutting the OTHER side of the TB and butting them up together so that you retain your MAP vacuum, your injector pods, and IAC passage. Put a couple breathers on your valve covers, remove the AIR system and bye bye cruise control.
What you'll have is a 4 barrel TBI with 4 injectors. Now for the tricky part.... getting the throttle blades to open opposite direction to resemble a 4 barrel carb/EFI throttle body.
Try cutting the OTHER side of the TB and butting them up together so that you retain your MAP vacuum, your injector pods, and IAC passage. Put a couple breathers on your valve covers, remove the AIR system and bye bye cruise control.
What you'll have is a 4 barrel TBI with 4 injectors. Now for the tricky part.... getting the throttle blades to open opposite direction to resemble a 4 barrel carb/EFI throttle body.
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Junior Member
Joined: Aug 2003
Posts: 63
Likes: 0
From: Forest Grove OR
Car: 91 Firebird
Engine: 305 tbi - 122k
Transmission: 5 speed
Did it in paint brush
, if you turned it around that may work ok, but I wanted the stock vacuum lines. Also if it was turned around the throttle blades would be turned around. But is that necessary?
I'll hack out another one here shortly, anyone know what the diminsions are for a holley square intake is. I got one off of ebay but it's not here yet.
, if you turned it around that may work ok, but I wanted the stock vacuum lines. Also if it was turned around the throttle blades would be turned around. But is that necessary?I'll hack out another one here shortly, anyone know what the diminsions are for a holley square intake is. I got one off of ebay but it's not here yet.
Member
Joined: Jul 2003
Posts: 251
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From: Alsip, IL (southwest chicago burbs)
Car: The rs is no more :(
Engine: the 2.8L in my LT
Transmission: 700r4
see dumbasses like me don't pay too much attention to things like spray can lines and what not. nice job. I'm dumb as ****. Now that I look at it I can see every little line. You should put together a puzzle book or something of optical illusions. The one thing I did notice right away was the bolt hole locations. I thought, " hmm that's wierd. what kind of intake would that go on?"
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