lunchbox
1/2 ton status
My engine is on its last couple of months, and latley ive been trying to figure out a good combination of parts to make my tbi 305 a little monster i was going to do a rebuild already but does anyone have a good 305 combo?
CK5
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what can i do to build power on a tbi 305
- Thread starter lunchbox
- Start date
Uncle Fester
1/2 ton status
contact tbichips.com that guy has some killer combos to make power with tbi motors.
theperfectgarage
1/2 ton status
Check out World Products 305 heads.
beater_k20
Banned
replace it with a 350, and dont tell anyone. the smog nazis will be none the wiser.
beastofablaze
1/2 ton status
350 swap is gonna give you more tq as well as hp but like everything else it'll cost money. Tbi kind of sucks for mods... I suggest you do EVERYTHING you want to do to it and then go get your computer flashed and reburned. What kind of numbers are you hoping for? You'll probably need a bigger tbi, manifold, fuel pump, better heads, and about 45 more cubes to get to anything significant.
Its been said on here thousands of times but I'll say it anyway... you can't polish a turd.
Its been said on here thousands of times but I'll say it anyway... you can't polish a turd.
berserker
1/2 ton status
here ya are
you wont make good power with a 305 sorry unless you want to put 10,000 into it. get a 350 with 2.02/1.60 valve heads from some one or a junk yard and if your already planning on doing a rebuild get a 383 stroker kit from PAW performance automotive warehouse like 1,500 go, .30 over, 10.1:1 compression, edelbrock airgap intake, 750cfm carb, long tube headers 3" exhaust, rework the heads, windage tray, get a cam to match your set up talk to PAW or other engine shop.
if done right you should be around 500 hp-500 ft.lbs
any questions let me know
you wont make good power with a 305 sorry unless you want to put 10,000 into it. get a 350 with 2.02/1.60 valve heads from some one or a junk yard and if your already planning on doing a rebuild get a 383 stroker kit from PAW performance automotive warehouse like 1,500 go, .30 over, 10.1:1 compression, edelbrock airgap intake, 750cfm carb, long tube headers 3" exhaust, rework the heads, windage tray, get a cam to match your set up talk to PAW or other engine shop.
if done right you should be around 500 hp-500 ft.lbs
any questions let me know
MattK
1/2 ton status
for the money for a most worthwhile mods you can probably pick up a tbi 350 and probably have it in.
Don't be hatin'
Don't just dismiss the 305 right away. My 305 has decent power, (DirtyJim knows) granted all the emissions devices have been removed. So what I have done is Weiand intake, Holley 600cfm carb (tuned correctly), open element air filter, duel exhaust, and ignition upgrades. I can break the tires loose with this setup. I will soon put in some headers and do 1.6 rocker arms so hopefully this will really open it up and I will see some tire smoke.
Upgrades I recomend to you:
Ignition
cold air kit
headers
exhaust
fuel pump
Holley throttle body
intake manifold
1.6 rocker arms
performance chip tune
If you want to go in further:
cam
heads
305 Stroker kit to 331 or 345
Don't just dismiss the 305 right away. My 305 has decent power, (DirtyJim knows) granted all the emissions devices have been removed. So what I have done is Weiand intake, Holley 600cfm carb (tuned correctly), open element air filter, duel exhaust, and ignition upgrades. I can break the tires loose with this setup. I will soon put in some headers and do 1.6 rocker arms so hopefully this will really open it up and I will see some tire smoke.
Upgrades I recomend to you:
Ignition
cold air kit
headers
exhaust
fuel pump
Holley throttle body
intake manifold
1.6 rocker arms
performance chip tune
If you want to go in further:
cam
heads
305 Stroker kit to 331 or 345
beater_k20
Banned
Chevy305 said:Don't just dismiss the 305 right away. My 305 has decent power, (DirtyJim knows) granted all the emissions devices have been removed. So what I have done is Weiand intake, Holley 600cfm carb (tuned correctly), open element air filter, duel exhaust, and ignition upgrades. I can break the tires loose with this setup. I will soon put in some headers and do 1.6 rocker arms so hopefully this will really open it up and I will see some tire smoke.
If you want to go in further:
cam
heads
305 Stroker kit to 331 or 345
tire smoke isnt a sign of power. my 230K 305 would smoke the tires, but it was no powerhouse.
as for the 331, for the same money, you could have a 383, yet you're still 50+ cubes away. way to budget.
lunchbox
1/2 ton status
wow, thanks for all your suggestions but, today in my high school auto shop class i was talking to my teacher about makeing power with a 305 he told me that i should just find a 350 and do a rebuild on that, it just happens that as he said that one of my freinds was walking by and he overheard our conversation, his dad has a 1992 silverado 350 tbi engine from a crashed truck. the engine's just sitting around at his dads shop and he said i could have it. so thats the direction i think im gonna take. would all this work?
berserker
1/2 ton status
switching it to a carb would be the easiest way to go if not, get the computer and try to get all the wiring not exactly sure what all needs to be done with tbi, but i would look into it first.
G
goldwing2000
Guest
NAWS!! 
beater_k20
Banned
lunchbox said:
should be a direct bolt in, swap the computer and the throttle body and i would upgrade to 350 exhaust. IIRC the 305 uses 2 1/2" single, where the 350 uses 3". 3" single is plenty for a 350hp or less small block.
beastofablaze
1/2 ton status
how bad was it crashed? might want to look it over real hard before you make a decision...
lunchbox
1/2 ton status
regarding the crash, the engine was yanked and it has been sitting under a tarp for a yearbeastofablaze said:
