I am planning to do this swap this upcomming weekedn, i have a 91 firebird, 305 tbi, and all the computer stuff, plus chip, but what I am wondering is will the computer handle the lt1, and cause any probs? plus should i go for the vette lt1 or the f-body cam? any help on this is greatly appreciated
--Brian

------------------
"If its in my way-It gets run over"

--'91 firebird
305 TBI
Hypertech chip
Edelbrock performer intake

Crane compucam 2010
B&M shift kit
straight pipe exhaust

 

Okay I want to do the same exact thing. I want an LT1 cam in my car, and I know a bunch of people do too. Will you take several pictures and explain it throroughly so that I can do it as well? You could make a tech article on it, and help us ALL!

Thanks

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1992 Pontiac Firebird
- 305ci V8 TBI / Automatic Trans / Loaded
- MODS: Edelbrock 14x3 Open Element Air Cleaner, Dual outlet exhaust

 

the later LT1 cam had a bit more lift of the exaust side. Chevy cam swaps are well documented. Go by a book.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

[This message has been edited by Tas (edited July 08, 2001).]

 

you want me to buy somehting? you're crazy.

 

im gonna have to second the comment on purchasing, i will trade though. two rocks, one bird.


fair?


and um.... seriously swap LT1 cam in??????
what else has to be done????

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91 FireBird 305 V-8
Edelbrock Catback, Fourth Gen Console. i have six cupholders. all for starbucks!
ghetto rigged cold air intake,
"My G/f Once Wanted To Break Up Because Of Competition With The Car."
GheTTo Riggers INC.
We Make Mcgyver look Like Crap
God Created The Earth, And Then Turned Up The Bass

 

Disconnect battery
Take off tbi
pull intake manifold
take off valve covers
pull push rods and lifters
loosen oil pan
remove timing cover and chain
pull cam
install cam

Repeat in opposite for you Haynes people

Should be a pretty good list. Like everyone says, if you have more than 60k on the clock, you'll wanna change your springs. People on here have recommended either LT4 springs or springs from a 1970 Z28 4bbl. You'll have to get more info from someone whoes done the swap.

------------------
Chuck Kulchar
1991 RS
Open Element w/K&N
3.42 posi disc

 

Um.. don't forget to degree the cam when its in, and adjusting the valves.. He basically summed it up but left out some minor things that could help keep your engine running longer and better..

 

thx chuck,

so what would gain from swapping in that cam for a 305 TBI with only exaust AE.

thnx.

 

so has anyone done this install?, I need to make sure it will still run right afterwords
--Brian

------------------
"If its in my way-It gets run over"

--'91 firebird
305 TBI
Hypertech chip-thermomaster
Edelbrock performer intake
Crane compucam 2010
B&M shift kit
straight pipe exhaust-with resonator tips
160 thermostat
open element

 

Now I see that it's hard to explain stuff like this on here.

Between where Chuck told you to disconect the batt. and remove TBI, you have to take out the distributor.

1.-Remove all plugwires and coil wire. 2.-Remove all weather-proof connectors. 3.-Remove cap. 4.-If you are using the same intake, mark the lower part of the shaft and manifold with a paint line for reference. 5.-Rotate engine so that the rotor points to #1 cylinder. 6.-Mark location of rotor on the outside edge of the dist base. 7.-Remove distributor hold-down clamp. 8.-As you lift the dist. out, the rotor will rotate approx. 20 deg. counter clockwise due to the gears that mesh with the cam. Lift slowly until the rotor stops moving, then mark that spot on the base as well.

9.-DO NOT rotate the crank after removing the dist.

These steps will make it easier to re-install the dist so that it is phase with the engine.

If you are planing to degree the cam and changing the intake, then this method won't work. You will have to rotate the crank to degree a cam. That installation of the dist. requires totally different steps. The marks on the dist will give you a good starting point though, so it may not be a bad idea to use them. You may be able to use the firewall as a reference point if you change intakes.

I'm sure I left something out to. Anyone else?

[This message has been edited by AJ_92RS (edited July 09, 2001).]

 

Ya Stormr, it will work just fine with a stock chip.At least it is for me.While it is quite an improvement,its still pretty mild by my standards.Mine was out of a 96 camaro,and I had to grind the pin down in length to match the LO3 cam's pin.

------------------
92RS LO3 700R4
open air element
ultimate TBI mods
LT1 cam
Edelbrock TBI performer manifold
180 thermostat
Hooker headers
3"cat back
Zexel Torsen posi with 3.42 gears

[This message has been edited by JokerRS (edited July 09, 2001).]

 

Anyone wanna install a cam for me?

 

no

 

hey joker, any guetaments on your power output with the cam?
--Brian

------------------
"If its in my way-It gets run over"

--'91 firebird
305 TBI
Hypertech chip-thermomaster
Edelbrock performer intake
Crane compucam 2010
B&M shift kit
straight pipe exhaust-with resonator tips
160 thermostat
open element

 

Any what?!?!???

 

that was supposed to be "any estaments", not guetaments

------------------
"If its in my way-It gets run over"

--'91 firebird
305 TBI
Hypertech chip-thermomaster
Edelbrock performer intake
Crane compucam 2010
B&M shift kit
straight pipe exhaust-with resonator tips
160 thermostat
open element

 

No guesstiments on power yet.I am looking for a used Gtech priced right.

------------------
92RS LO3 700R4
open air element
ultimate TBI mods
LT1 cam
Edelbrock TBI performer manifold
180 thermostat
Hooker headers
3"cat back
Zexel Torsen posi with 3.42 gears

 

I was trying to help OEJ with this in another forum. My questions and concerns were:

Isn't the cam from an LT1 a roler tappet cam? Did the 305 also have the roller tappets? Basically, a $40 cam is not a bargain if he needs $200 of tappets and pushrods.

Can the 305 handle a 350 cam's higher lift without flycutting? I hear it's "close". Also, any comment on valve springs and binding?

I also suggested a new timing chain set for about $50. Maybe thats just me.

The cam change I can understand but with so many excellent grinds to choose from today, why mess with a used LT1? Is it just because it is a magical "LT1"? Then again, perhaps because its $40!

 

The L03 & LT1 cams are both hydraulic roller cams. The stock lifters will work just fine. Lift problems may only occur if you go with something with more lift than an LT4 camshaft. The LT1 will work just fine.
Why go with an LT1 cam? I am sure you could find a better one, but if you look at, say edelbrock's cam they recommend for our car, it is a flat tappet, and the LT1 has a better profile, as well. You will also pay a lot more for a new roller camshaft.

The stock springs should work, but I plan on getting better ones myself and some self aligning 1.6 roller rockers while I am at it.
As for a new timing chain and gear, it is good to replace while you are there, also think of replacing the harmonic balancer while you are at it.

It is just a great bang for the buck item for our cars.

------------------
Flowmaster 80 series muffler
no cat, straight pipe
K&N Open Element cleaner
Ultimate TBI Mods
Homemade Subframe Connectors
GM Wonderbar
lead pedal foot . See my project rocket turtle @
http://oursportscars.homestead.com/firebird.html

[This message has been edited by 91Firecrow305TBI (edited July 11, 2001).]