Thread: chevy 305

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my grand father pass away a few months ago an gave me a chevy 305 in the car but i dont think it ready to hit the street what could i do to add a lil kick to it such as cam headers intake carb get my new heads re works an a bore .30 .40 .60 over an how many horses could i get out of doing this an by the way im new to the motor game... an i know what some people will say jus get you a 350 or better but this is to my grand father

i live in georgia too, i live in gainesville, where are you at?

im on the south side of the atlanta but back to my ? im tryin to bring the inner beast out of this lil mtor an i know it has it in him

well first what kind of car is it going in? also how much money are you looking to spend on this motor? the first thing i would tell you would be to get a 350 but i understand that this was your grandpa's car. would you ever consider pulling out the 305 and sitting it on a shelf, and buying a 350? and building it, that way if it ever broke or blew up it wouldnt be the motor that you grandpa had. but if you are dead set on the 305 we are going to need to know how much money you are looking to spend and what kind of motor you want, are you gonna want to drive it on the street, do you want a motor that is going to rev and make power at high rpms or a motor that makes low end torque, low end torque isnt going to be easily accomplished with a 305, i would build a reving motor
Tyler

i would want to spend that much on the total build the car will be drivin on a daliy bases an i got my other lil side project for my 350 this is jus to let him know i was thinkin about him the 305 is in a 1980 cutlass so i think its light i would like to get about 300-330 horses out of on pump 90 gas

ok i would bore it out, talk to your machine shop about how far over you will be able to go, also you might want to see about getting some heads from GM perfomance, i think summit sells some for $500 i think they are vortec heads but im not sure im a ford man but some of the other guys on here will know. but you could get some headers, just call summit, dont go crazy big, anything with 2 1/2in collectors should be fine. then you will want an intake, prob something with a high rise, you wont be worried about torque with a 305 i would look at edelbrock, as for a cam look at comp cams i would get something with about .480 to .500 lift and .200 to .220 lift @ .50 there should be a measurement @ .50 that is what you want to look for, not advertised duration. i would put in some 10:1 compression pistions, and make sure you get some new valve springs to handle all that valve lift, comp should be able to sell you everything you need

http://www.goingfaster.com/spo/343hp305.html Here is some good info.!!
Speed (rpm) Torque (lb-ft) Power (hp)
3000 324.3 185.2
3250 333.7 206.5
3500 342.0 227.9
3750 347.0 247.8
4000 352.1 268.2
4250 356.2 288.2
4500 351.9 301.5
4750 340.2 307.7
5000 333.8 317.8
5250 324.4 324.3
5500 313.0 327.8
5750 306.2 335.2
6000 297.3 339.6
6250 288.2 343.0
6500 258.4 319.8
http://www.goingfaster.com/spo/modthel03.html

i talked it over with my older brother he said lets jus pull the motor out an store it an i got a 350 block layin around so im talkin it to the shop to get it rebuilt with 9:5:1 with vortec heads tryin to put out about 350 horses an it shouldnt be hard with the heads an the cam im going with an the vortec intake an the holly carb so im cool people thanx for your input an info

here's a nice tech tip on the 305 chevy mtr......joe

yea i seen that so i really cant say what to say about the 305 an the 350's

an to be real i would like to keep this motor that in there right now an see what these upgrades would do to it with the vortec heads an all that with it

Here are some 305 buildups that I have kept as favorites for a while. Maybe you can get some good out of them. http://www.goingfaster.com/spo/325_h...3hp/343hp.html
http://www.goingfaster.com/spo/290hp305.html
http://www.hioutput.com/tech/400hp/400hp.htmlhttp://<br /> <br /> http://www.hi...3hp/343hp.html