has anyone ever put a 350 tbi in a 91 firebird . i got a 94 350 tbi for 650.00 intake and all motor too. tbi also. ive been doing the tbi mods and paying ataention. jusst want to know will my ecm know whats going on ive also got headers. too. stock truck cam. motor only had 84000 my lo3 had 215000. seemed like a good deal. help if you can.

 

If you're sure it runs OK, then drop it in man!!!

IF you've got everything still on the block, including the TB, injectors, and the knock sensor, then you're set.

If not, then you need to change/add those. You'll need higher flowing injectors (JPrevost knows which), and the knock sensor.

Later on you should change the chip to a custom burnt one. That'll make sure you get the most HP outta the swap, but it's not a requirement.

Oh. Just so you know, keep the roller cam stuff outta the Firebird. Like the lifters, the 'spider', the retainers, etc. That'll make it much easier (in other words "cheaper") for you to change the LO5 to a roller cam motor later on.

AJ

 

i beleive the stock l05 uses 55 pph injectors. I have a set in my tbi for my 350.

 

i didnt know the trucks had reg cams and not roller cams done got rid of old motor. i read somewhere that after 88 or 89 all gm sbc had roller cams. that figures oh well.

 

I thought it was 87, and it does not apply to trucks.

My L05, for example, uses a roller cam (and 68lb/hr injectors - trucks got 55lb/hr I think).

 

trucks got Flat Tappets through 95

 

My RS was a stock LO3, so when I blew it up(128,000mi) I decided to put in a 350 out of a 93 1500series Chevy pickup. I had the whole motor, even all the sensors. The main things that differ from the 305 are
- injectors
- ESC(electronic spark control module(located by the fuel pump relay in the engine compartment))
- Knock sensor
- computer chip

You can get away without changing your computer chip, however the car will only run like a 305. The chip regulates the fuel and you will only get enough fuel to make the 305 run well. That 350 will starve for fuel. I got Brain Harris to make me a chip with the program that they used in the LO5 police package caprices. That chip will work great for you as long as you have the TH700R4 tranny. If you have any questions on this swap that I haven't covered feel free to email me RSCamaroGuy92@yahoo.com I have just done this swap a month ago.

------------------------------------------------------------------------------
Mods on engine
- self ported & polished heads.
- Edelbrock TES headers.
- Custom 2 1/2" y-pipe
- Complete 2 1/2" Cat-delete flomaster 80 series exhaust/muffler
- MSD blaster Coil, Cap, Rotor
- New Taylor 8mm wires
- Splitfire plugs
- Cop Car computer chip
- Hypertech 180 fan switch & themostat.
- Melling High Volume Oil pump
- Ported Stock intake with ultimate TBI mods

Soon to come:
- Either Edelbrock Performer Multi-point EFI unit for TBI
or
- (sorry guys) Performance TPI setup(less likely)

 

yeah but my car has the 5 speed, and later it is getting the t56 speed.who can i get a chip burned from. and i didnt get the esc relays, or whatever they were. all i got was the motor , tbi ,intake, motor mounts, oil cooler, distributor. ove got everything down in and ready to fire up except need the oil lines and oil cooler so it can start with out pouring oil everywhere. the motor had everything on it still.it even had performance wires and bosche 4 plugs. just need to know where to get chip.

 

i got a 94 subarban 350 in my 89... what is that, l05???

 

Brian said that he just started making the changes to the chips to accomedate manual tranny's. You'll have to ask him about that future swap though.

If you run into any problems at all, feel free to email me, RSCamaroGuy92@yahoo.com

 

jlbolin:

Concerning your oil cooler, Why not buy oil filter adapter GM#3952301 and bolts #3951644 and do away with it.