I bought a Holley TBI this weekend which has the same size bores as my intake manifold. Does anyone know what this unit is supposed to flow? How does that compare to my stock TBI? Should I use the Holley or not? Also what size fuel injectors should I use?

------------------
Black 1989 RS Convertible w/46,000 mi.
Excellent Condition
LO3 305 w/TBI
15 PSI Fuel Pressure
10* Timing Advance
MSD Coil And Wires
Open Element 14x3 K&N
Hypertech Thermomaster
160 Degree Thermostat
Low Temp Fan Switch
Hedman Headers & Y Pipe
Eddlebrock RPM Muffler
High Flow Cat
No AIR Injection
B&M Stage 2 Shift Kit
17"x8.5" ATP 5 Spoke Alloys
P 245/45 Goodyear Eagle
HP Ultra Plus Tires
Lakewood Control Arms
Lakewood Pan Hard Rod
Coming Soon:

1.6 to 1 Roller Rockers

 

That sounds like the unit for the 4.3 liter V6. On the 1.6 rockers be sure to check the pushrod clearance to the head. The ratio change moves the pushrod closer to the stud and this may cause a clearance problem. Maybe someone who has done this will insert some info here. I am fixing to change cams instead of doing the rockers. Good luck!

------------------
91 RS 5.0 TBI....Edel. TES headers .. 3" exhaust ...Dynomax muffler...5spd... 3.08...underdrive pulleys...cold air K&N flat bottom breather...strut tower brace...6-point rollbar...sub-frame connectors...Koni shocks and struts...16" Black GTA wheels...Autometer guages...custom chip...Grant steering wheel...a/c delete...smog delete...rear seat delete...ultimate TBI mods...afpr...36mm front and 25mm rear swaybars with poly bushings...

 

It seems to make sense. I understand that the Holley TBI for the 4.3L is only rated at 400 CFM. I think I'm going to return it and stick with my stock unit. Eventualy I'm going to a carb any way. As soon as I can afford to get all of the necessary components together.

Also, I think your right about getting the cam instead of the 1.6 rockers. I'm thinking about the crane powermax 2020.