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post #1 of (permalink) Old 03-14-2006, 05:16 PM Thread Starter
 
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305 or 350?

So i'd say that 80% of the trucks I've seen during my search for the perfect one (in my eyes anyway) have had a 305 and not a 350. I've heard from a couple of people that a 350 is the way to go (for obvious size reasons, and the fact that it's a great motor), but what is it that makes the 305 not likeable?

Just curios...
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post #2 of (permalink) Old 03-14-2006, 07:55 PM
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Re: 305 or 350?

the 305 is an all around weaker motor. no form was ever a power maker. there is nothing really "wrong" with them, just they are a small displacement motor with 8.5:1 pistons and no real cam.

if you don't need tons of power, you will not have a problem. i'd never rebuild one to put back in a truck, but if it has a 305 that runs strong i'd buy it.

a 350 swap is very easy, if you so desire.
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post #3 of (permalink) Old 03-16-2006, 10:07 PM Thread Starter
 
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Re: 305 or 350?

It's not that I need tons of power, but that's one of the reasons that I want this particular truck (or style of truck rather). I want something big and powerful.

Just how easy and costly would a 350 swap cost? What can be used off of the 305 for the swap? What parts in addition to the actual engine would be needed?
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post #4 of (permalink) Old 03-19-2006, 09:18 AM
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Re: 305 or 350?

Well, a 350 long block will bolt in place of a 305. All 305 blocks, heads, carbs/tbi, exhaust manifolds exc are basically junk when it comes to making HP.

Cost depends on how new you want stuff, and how much power. I've put together small blocks making 375 HP at the crank for $3500. That is 030 over, top shelf guts. At the other end, a used motor from you pull it runs you $300.

To make the 350 really work, the parts needed are basically everything. Your alt, water pump, all that stuff bolts up. Your gonna want a new long block, intake, carb/tbi.

A middle of the road way out is to find a good bottom end. The tbi motor 350 bottom ends are a good start. Slap some summit racing brand 2.02 1.60 heads on that along with a good intake and carb. Put in a new cam, nothing to hot. That should make you good HP at a good price. Later on, a totally new bottom end can go under the new heads.
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post #5 of (permalink) Old 03-20-2006, 11:05 AM
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Re: 305 or 350?

I put a GM Goodwrench 350 crate motor into mine. It originally had a 305 in it. The 350 cost me $1500 to be put in my garage. I am very happy with it as it is a new motor and has good warranty. 3yrs/50k miles I believe. All you need is distributor, waterpump, intake, carb, flexplate or flywheel, and starter. I am assuming you have the other basic stuff.


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post #6 of (permalink) Old 03-20-2006, 04:02 PM
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Re: 305 or 350?

I've had them both, in K5's, and a 350 will get my vote every time. My 89 TBI 350 would burn circles around my 84 carbed 305.

Hold out for a 350, or plan to swap one into the vehicle you like. You will be glad you did.
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post #7 of (permalink) Old 03-20-2006, 11:01 PM
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Re: 305 or 350?

the tbi is a strong motor. i'm not sure what is more powerful, a tbi motor or the last of the 350's with carbs. given the choice tho, i'd go with the tbi. older carbs lead to problems, and you end up replacing them or going crazy trying to find out why they don't quite work right.
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post #8 of (permalink) Old 03-20-2006, 11:27 PM
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Re: 305 or 350?

The last year for a carbed 350 was 1986:

OHV Eight-cylinder 350 cid. (185hp) @ 4000 rpm

And in stock form, it's still a little behind a stock TBI 350:

OHV Eight-cylinder 350 cid. (210hp) @ 4000 rpm

I agree on going with a TBI over a carb. My 89 K5 get's great mileage, for those who are looking for that, and still makes very respectable HP. The 89's TBI 350 in my K5 feels about the same (seat of the pants measure) as my 255 HP 350 vortec, in my 97. The idle also stays nice and smooth when off camber, or climbing.

Also as a comparison,

OHV Eight-cylinder 305 cid. (155hp) @ 4000 rpm (*carbed*), if GM made a TBI 305, I don't know about it, or it's hp ratings.
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post #9 of (permalink) Old 03-21-2006, 07:10 AM
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Re: 305 or 350?

There might have been a TBI 305 in the last of the gen 3 camaros. The years right up to 1992. There was a "High Output" 305 used in the last camaros, but i don't know the HP. It was a multi port fuel injection system similar to that of the LS1 motor.
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post #10 of (permalink) Old 03-21-2006, 11:01 AM Thread Starter
 
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Re: 305 or 350?

I'm trying to hold out, but I may not be able to pass on this one with a 305. A swap would definitely be in the plans (I want it for a project anyway, so what better to do than put a new motor in it???). I'd just have to find someone with the tools and the knowledge to help...

Anyway, here are a couple of pics of the truck I'm hoping to get (gotta talk the guy down a little more) -



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