Thread: 305?

Tweet

i have a 305 in my chevy silverado...it has edelbrock 600 cfm carb ,performer intake, and headers/flowmaser...im looking to gain some horsepower , improve gas mileage and run a cleaner truck...i dunno if i should just take everything apart and take it to a machine shop..or just go out and buy a 350 w/400 crank to have fun with..any suggestions on doing this without spending 3+ grand?

Don't know what to tell you. this is a choice you have to make. I had a 85 p/u with 305 new in 85 it didn't have enough power to get out of its own way. If I were looking for pep and power I wouldn't start with a 305.

thats kinda what i was thinking...i might look into a 350 then..i would also like to hear from someone if they have one in texas for sale.

speaking of truck motors mines about ready to take a dump, what are some good truck head casting numbers to look for i was mine has the 1.94's that like to crack and that sucks!

chevyss454
You could check ebay just watch what you buy

The 377 is a decent engine. For pure torque and good hauling/towing power the only thing that will beat a big block is a diesel.

im looking for more of a go fast engine....torque is good thoe

Usually cheaper and a lot more streetable to build big torque vs. big horsepower.....

how far could you bore a 305 out to for that matter?

Hey 454 , I feel for you cuz Im going through the same thing, I have a 1973 Chevy C10 and Im trying to Hot Rod my 305. Its hard but with effort you can manage it, I look at it like , Anyone can make a 350 go fast and especially a BB, But it takes Talent and Skill to Make a 305 Fast. First Off Scrap the EdelBrock Carb They suck, Put on a Holley 650 Street Avenger, Second get some Decent Voltage going through the wires, Get the MSD dist./Wire Combo and then a 6a MSD Tuner. 6AL if you dont have a Built in Rev Limiter on your dist. I would Scrap the FlowMasters too, And get some Glass Packs, Te Breathe Better, Get a Nice Set of 416 Heads with 58cc Combustion chambers, and A Decent Thumper Cam. That should Make some good power. Last But Not least you can get a Nice Blower From Vortech, The S Series. With all that you should be making just about 350-400 HP. Belive me, 305's are more Compatible than everyone thinks. Its taken me 2 Long Years and I am Just getting done with The Ignition. (Moneys Tight) I have to get heads and a Good Cam Next. Consult This site for the best info on these babys:

http://www.jalopyjournal.com/forum/a...hp/t-1494.html

By the Way, Good Luck. You will need it.
Im Moving to WV this Winter and Im planning a Frame off Hot Rodding on my Truck, I hope to achieve 10 seconds when Im done, Wish me luck yall

you could put a 406 sbc in it lots of power and torque. I have one for sale if you know any one the is looking for one

How Much $ ?, Right now Im Building a Dirt Circle Track Car,

Hey 454 , I feel for you cuz Im going through the same thing, I have a 1973 Chevy C10 and Im trying to Hot Rod my 305. Its hard but with effort you can manage it, I look at it like , Anyone can make a 350 go fast and especially a BB, But it takes Talent and Skill to Make a 305 Fast. First Off Scrap the EdelBrock Carb They suck, Put on a Holley 650 Street Avenger, Second get some Decent Voltage going through the wires, Get the MSD dist./Wire Combo and then a 6a MSD Tuner. 6AL if you dont have a Built in Rev Limiter on your dist. I would Scrap the FlowMasters too, And get some Glass Packs, Te Breathe Better, Get a Nice Set of 416 Heads with 58cc Combustion chambers, and A Decent Thumper Cam. That should Make some good power. Last But Not least you can get a Nice Blower From Vortech, The S Series. With all that you should be making just about 350-400 HP. Belive me, 305's are more Compatible than everyone thinks.

Talent and skill?? First off, Edelbrock carbs dont suck, they're a great carb. Nothing wrong with Holley either, but dont blow off the Eddy...it will work fine. The stock HEI ignition is more than adaquate for any application. You dont have to invest in a MSD ignition to go fast...matter of fact, you wont go any faster with MSD unless your current system is failing and on the way out. If it runs without ignition problems now, leave it alone. Flowmaster is not my favorite muffler, but glasspaks are NOT the way to go. There are many straight thru mufflers, or even baffled types that flow great, and sound a lot better than something from the 50's. What's a 'thumper' cam?? You can upgrade your camshaft, but you have to match your cam choice to the rest of your parts. Dont just go throwing any old cam in there. A blower is a good way to make power, but makes the cam choice even more important. Blower cams are a much different grind than normally aspirated cams. Besides, a blower is big bucks, and if you start with a better block to start with, you can make power much more economically. Make sure you do research and get some good info before you go tearing anything apart. Personally, I would build something else, the 305 is OK, but never turned out to be a good performance build. You can pick up a 350 block pretty cheap, or maybe an entire engine, and go from there. John

Talent and skill?? First off, Edelbrock carbs dont suck, they're a great carb.


Amen. Troublefree, work pretty well out of the box, compact for 2 four manifolds, etc. I love 'em.

As for the 305 vs 350 part............. if you and I start out with two engines, you with your bare 305 and me with an identical 350, then we start adding exactly the same parts, the final result will be the 350 is stronger. It has to be due to the old axium "there is no substitute for cubic inches."

I know there is a certain segment of the car hobby who likes to play David vs Goliath by killing the competition with a small cube motor, but generally more is better in relation to cubes.

We sell boats, and very often a person who buys a new one will come back and say " I should have bought the 5.7 instead of the 5.0 because of the dramatic difference in HP and torque."

But the 305 is still a fine engine.


Don

Just saw this 305 thread ,http://www.goingfaster.com/spo/modthel03.html make that 305 a screemer!!Bottom of page has links to more 305 power!!http://www.hioutput.com/tech/400hp/400hp.html