I own a 91 RS with TBI and have a TPI setup from a z28. would it be worth swapping them and if so has anyone done it.

 

To answer your question, Yes, alot of people have done the swap, including myself, but I went from a 4bbl to TPI. You can read all about my adventures on my Website.

www.3rdgenformula.com
After the spash page, on the left side of my main menu about 1/2 way down go to "Modifying my Formula" from there you will find "TPI swap" I is kind of like a journal, so you can see how to do it. doing a TBI will be different, but similar, also I did a Firebird which will differ from a Camaro.

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87 Formula 5.1 converted to TPI Yellow/Black
SLP Dur 206/212, Lift 480/487, Cent Line 112 cam, SLP headers, SLP cat-back exhaust
Modified Stock cold air intake
Ported & polished Stock TPI intake
AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
KYB AGX Adjustable Shocks & struts
Hotchkis strut tower brace
South side machine frame connecters
Custom reinforced control arms and pan hard bar.
Custom Leather interior
CUSTOM Yellow Gauge Faces

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

you need a TPI fuel pump. The TBi runs at a lower PSI than TPI, you have to swap in tank pumps to do so. Tpi is well worth it, torque and fuel milage definetly increase.