OK guys... I know the L03s are the lower end v8s, but can anyone tell me there pro's and con's?

Sence im ripping the engine out, any addvice on what i should upgrade? im planning on a cam, and im getting the heads shaved. thats all tho... remeber im a very poor person. thanks.

 

Pros eh? I can't think of one
Maybe dump those heads and get a pair of TPI 305 heads (very cheap) port them and do a 3 way cut on the valves. Those TBI heads are crap

 

lmao. thanks! i have tbi L03

i just finished my audio system, and i am saving up for my motor work now. i can't wait

oh, and 777ZLLL, don't worry i have a 180k miles on my car too

-fly

 

Only pro is it's a V8.

cons: sucky cam/ crap swirl port heads/tbi induction, exhaust.

 

i am going to put headers with true dual 2.5" exhaust on flowmasters, no cats probably.
-fly

 

good luck with clearance for one, and 2.5" is overkill for a 305 TBI. I'd go with 2.25" duals at most.

 

If you want my honest opinion, there are no pro's. Dump the TBI and look for a TPI motor. You can spend alot on a TBI and make it fast but a TPI with the same stuff will always be faster. For this reason I dont even waste time on my L03. The L03 was a good motor for getting me to point B and sounding good on the way, thats about it. I will be swapping the L03 out of my 90 RS pretty soon and a TPI motor is going in.

 

The 305 itself TPI or TBI is a boat anchor. Waste of money. But if u have to keep it. Might as well ditch those heads, swirl port design sucks and is a waste to work on, ditch the intake and ditch the cam. If ya gotta keep the tbi, go do the ultimate tbi mods, they are good and free up some sh*t. They make heads for the 305 from World Products. Grab a Edelbrcok Performer intake and an LT1 cam or hotter (don't go hotter then an LT1 though if ur gonna have stock heads, modified or not) and hope for the best. I know Holley makes aftemarket TBI's but u gotta make sure u don't flood your engine and over do it.

Go to my Modeval site in my sig. if u have any other questions. I got pics, part numbers, descriptions and do's and don'ts.
Your in for a long haul though if u want this to be a fast 305. Fastest 305 I have seen on here was a 12.1 and that was a 305 TPI that was decked out from head to toe (including the rear,tranny and suspension). and he had a S/C and a 75 shot. A lot to go thru to a run a 12.1 if u ask me.

 

you could always try dropping in a Vortec 305 long vlock and bolt up the TBI...just a thought

 

Well...uhh.. for appearance the casting #s on the 350 look better. What was that web site with the dude that had all the suggestions about upgrading the tbi, hang on....

 

oh I know the 350's better- on other message boards my username is 305fan! Gotta speard the word!

 

<font color=red size=8>HERE!!!</font>
http://www.goingfaster.com/spo/modthel03.html

 

If you want to keep the TBI i would sugges the following route cause it's the best way to go IMO, also it seems to stay together for a long time.....

• Gears & Posi
• LT1 Cam
• Exhaust & Cat
• Open Element Intake
• Intake Manifold
• Headers
• Ultimate TBI

That is a good start

 

And if u want detail information about those following listed, go to the second site in my signature.

 

Look at http://www.goingfaster.com/spo/spo_t...y_central.html
There is a lot of really good info on the L03 TBI.
Also check out http://www.firebirdmania.com/
under 3rd gen,1991 Formula, entry #200.

Good luck,
Don