305ci V8 questions???

[cmyc5575]

I have the orginial 305 in my 82 lwb gmc sierra, and was wondering if anyone has done anything to their 305's that gave them more power??? I hear alot of people that rebuild the 350 or swap the 305 for a 350 to race like quarter mile. Are our 305's worth the quarter mile to put money in them and beef them up???

[Pop's C-10]

nope...*coming from a 305 lover*

It you wanna build a nice lil street motor..then jus add a lil cam with good lope..intake..headers & drive tha wheels off it..

[cmyc5575]

Originally Posted by Pop's C-10

nope...*coming from a 305 lover*

It you wanna build a nice lil street motor..then jus add a lil cam with good lope..intake..headers & drive tha wheels off it..

Ok well i was thinking of doing more of a street motor that allows me to have some get up and go! So i think that i will do that. What do you think of buying a posi for my truck to???

[stepside-mitch]

are you running auto or stick? I have a mildly built 305 thats backed by a sm465. I could have 1000hp and still go nowhere with that trans. good luck and try not to let the hurtful comments get to you.

[cmyc5575]

Originally Posted by stepside-mitch

are you running auto or stick? I have a mildly built 305 thats backed by a sm465. I could have 1000hp and still go nowhere with that trans. good luck and try not to let the hurtful comments get to you.

its an automatic trans 3 speed i believe! no worries or feelings hurt Im just wanting to put a lil money into the motor bc needs some tlc along with that thought i would try to do it all at the same time

[Goldfinger]

When it comes to the 305 gearing can really help or hinder. Throw in a 3:73 rear and it will accelerate much quicker. with 2:73 acceleration is nothing.

[cmyc5575]

Originally Posted by Goldfinger

When it comes to the 305 gearing can really help or hinder. Throw in a 3:73 rear and it will accelerate much quicker. with 2:73 acceleration is nothing.

i figure that the rear end gearing could also help to change. Im thinking about getting posi lock for it, would this cause me to have to buy new axels or rear end???

[Goldfinger]

Most people i know will buy a used rear with similar dimensions and bolt it in then do whatever is needed for the drive shaft to be connected

[motornut]

look for ..............RPOs
i have a 79 305 -1LG9
with a rear of 3.4 -1HE4
and it's got a locker-1G80
seems real good so far

[cmyc5575]

Originally Posted by motornut

look for ..............RPOs
i have a 79 305 -1LG9
with a rear of 3.4 -1HE4
and it's got a locker-1G80
seems real good so far

rpo??? Lol im not down with all the new hip lingo!

[Goldfinger]

They are build codes for the trucks found on your build sheet. under the seat usually.

[cmyc5575]

Originally Posted by Goldfinger

They are build codes for the trucks found on your build sheet. under the seat usually.

well i assume when he said locker means posi lock??? im pretty sure mine didnt come with it bc when i floor it coming of the line only one wheel spins!

[Goldfinger]

Gotta love 1 tire fire. you would know if you had posi. you can feel it when you turn and both tire spin at the same rate. also your turning turns from 6 lanes and the shoulder to earths orbit

[cmyc5575]

Originally Posted by Goldfinger

Gotta love 1 tire fire. you would know if you had posi. you can feel it when you turn and both tire spin at the same rate. also your turning turns from 6 lanes and the shoulder to earths orbit

Lol thats so true! I use to own a Buick Riveria that had posi and could tell! i want to buy one for this truck so bad, could you possibly tell me where to buy one and what all parts i would have to buy to get my rear end done!!!

[motornut]

Originally Posted by cmyc5575

rpo??? Lol im not down with all the new hip lingo!

mine was in the glove box
I think i got the rpos right
regular prduction order
no prob turning because of the rear ,short wheel base too

one wheel wonders,had to get the guys out and lift the back to get the 250 to spin (72 Ventura)lol

and i think the pumpkin (rear end) had a number (looking front to back)on the right side tube

[Goldfinger]

For the Posi You need to identify your rear spline count and what type it is(10,12,14 bolt etc) I've heard good things about e lockers. they can be turn on and off on demand. As for a rear end i personally would just buy a complete one that still has tight tolerances. for the ratio it's based on preference. 3:42's are good for everyday. If you have overdrive 3:73 is liveable. The Lower the gear the more acceleration but also higher rpms at speed.

[cmyc5575]

Originally Posted by Goldfinger

For the Posi You need to identify your rear spline count and what type it is(10,12,14 bolt etc) I've heard good things about e lockers. they can be turn on and off on demand. As for a rear end i personally would just buy a complete one that still has tight tolerances. for the ratio it's based on preference. 3:42's are good for everyday. If you have overdrive 3:73 is liveable. The Lower the gear the more acceleration but also higher rpms at speed.

ok ill look at it in the morning and get back to you! i want something that just locks up both wheels so they both spin.

[motornut]

what i was warned about is that the locker can spin you sideways easier
the one wheel "loose" keeps you more centered or "on the road,not across it" lol

[cmyc5575]

Originally Posted by motornut

what i was warned about is that the locker can spin you sideways easier
the one wheel "loose" keeps you more centered or "on the road,not across it" lol

well im not totally mechanically inclined and know parts like most people on here do. but i do and know i can drive anything! as long as you dont get to heavy footed on the gas youll b fine.

[motornut]

Originally Posted by cmyc5575

well im not totally mechanically inclined and know parts like most people on here do. but i do and know i can drive anything! as long as you dont get to heavy footed on the gas youll b fine.

thats what i said

[cmyc5575]

Originally Posted by motornut

thats what i said

[Goldfinger]

think of a skid steer how you have one wheel braked so that you can turn. wet conditions it can get sketchy.

[turbo350]

I still have my old 305 sitting in the garage. Cant bring myself to part with. It was originally in my old boat. Yes you can build them up to have fun but if you are serious about going fast you need more cubes. What the 305 can provide is reasonable fuel mileage if you build it right-google is your friend.