305 vs. 350 in s10

[jeffronismo]

Hey guys I have been thinking about building a truck for awhile now and have run across something. What are the differences between the 305 and the 350? What are the differences in power and the pros and cons basically of putting a modded 305 into a 86 s-10 vs. a 350. Thanks, JEFF

[corey r.]

305's are boat anchors. Dont waste your time on them.

[TheShow50h]

Originally posted by corey r.
305's are boat anchors. Dont waste your time on them.

+1

Same cost to build a 350 and make a lot more power.

[displacementjunkie]

305s are not good horse power motors invest in a 4.3 or 350 something with a good sized piston

[Just Dave]

If you can get a 305 cheap, use it, just realize it takes the same amount of work and same parts to put a 350 in which will provide you another 50hp.

[Sneakin Deacon]

....305 is a WASTE...nuff said

[jeffronismo]

WHAT IF the 305 was bored .60 over and had some performance parts? Aren't the 305's internals the same as the 350?

[Mars_302]

305=3.78" bore
350=4.00" bore

305s are realyl small bore motors. They make decent torque, thats about it. You will spend a lot of money to make a fast 305 and for what you put in it, if you had a bult a 350, youd be making a lot more power. 305s use really small valves due to the small bore, so they dont get a lot of air in.

[Gunslinger09]

Originally posted by Mars_302
305=3.78" bore
350=4.00" bore

305s are realyl small bore motors. They make decent torque, thats about it. You will spend a lot of money to make a fast 305 and for what you put in it, if you had a bult a 350, youd be making a lot more power. 305s use really small valves due to the small bore, so they dont get a lot of air in.

EXACTLY.

Biggest valve you can put in a 305 cylinder head casting is 1.94" They are limited on what they will flow even with porting due to the limits of valve size. They do however respond nicely to forced induction. So if you go with a 305 slap on a turbo.

[24-7]

Originally posted by corey r.
305's are boat anchors. Dont waste your time on them.



+1

[JimmyHat]

Originally posted by Fordified
If you can get a 305 cheap, use it, just realize it takes the same amount of work and same parts to put a 350 in which will provide you another 50hp.

50 HP? more like 150 to 200 more. if you build it right.

[Just Dave]

I'm talking about a stock engine. Basically, if someone is giving you a running 305, put it in. Get a carb, intake, pulleys, headers etc. All of that stuff will carry over to a 350, then put a 350 in it if you're not happy.

All I'm saying is a 305 only "junk" if you are spending money building it. If you get one for a screaming deal, its still a V8.

[JimmyHat]

if your on a short and I mean REALLY short budget get a 305 because you can find a good running 305 for about $75 hell I gave my 305 away http://www.tamparacing.com/forums/showthread.php?s=&threadid=151592
there almost not worth having as a paper weight.
my 305 put out 175 hp and 255 lbs or torq in a 3500 lb camaro. it was a turd to say the least. civics were spanking me left and right. THEN I built a 355 (350 bored .30 over) and im having a HARD time finding one to beat me. go with a 305 for economy v8 power go 350 for substantial power.

[corey r.]

Originally posted by Fordified

All I'm saying is a 305 only "junk" if you are spending money building it. If you get one for a screaming deal, its still a V8.

Honestly, sometimes I forget that it is a V8... :(

[jeffronismo]

lol, Well , I'm Going to hold off and keep saving some money this year and probably build the truck next year with a 350 then.

[JimmyHat]

I would like to see the current performance that 305 puts out with all the work done to it. where you located?

[boostin97s-10]

Go 350 all day so much more there

[97blkz]

305 the ghetto v8!

[boostin97s-10]

Originally posted by 97blkz
305 the ghetto v8!

Exactly, If your gonna go through the trouble I'm goin through right now, you are gonna be pissed as hell once you put the 305 in and can't tell the difference between that and the 4.3, You'll be fighting to beat 4.3's with minor bolt ons. 305=:monkspk:

[JimmyHat]

I think there alot of ass thrashing about this delema. I have talked to jeff adn I think hes gonna be fine. he is just gonna start with the current 305 and then bump it up later down the road. its a project. but for now I see no reason he cant spray the piss out of the 305 for fun until it blows. What other motor would you rather spray the hell out of and not care if it blows.. if it blows then it just makes for a good excuse to drop in our favorite 350.

[jeffronismo]

Decided to wait on the truck and not do anything. Keep fixing up my car, And maybe buy something and build it next year or just build the hell out of my car.... Thanks guys for the input and suggestions.

[DOHC16CRX]

well i se alot of trash talking.i know a 350 puts down more power(of course) it is a 305 block flat top 0.60 pistons 480 cam with a 350 rotating assembly and 350 heads its feed by a holley 700 dual carb and takes every bit of it.hardly compares to a 4.3

good luck with you car!

[corey r.]

Who's Trash talking? I own a 305, I know how much of a dog it is.

I would rather have the 4.3 V6, at least I would save a little more gas money.

[Half Fast]

As the :mullet: 's would say "That dog don't hunt".

[DOHC16CRX]

corey r.this one is for from a dog.stock 305 and 350 motors are dogs,i agree.this is the quickest 305 ive ever seen.

[corey r.]

if you got a 305 to even run mid 14's N/A I would be impressed.

And if you did all the money from the work and expensive parts would have been better spent on a 350.



Building up a 305 is kinda like if Leonardo da Vinci painted the Mona Lisa on a paper towel.:mullet:

[Ian MMF]

Originally posted by corey r.

Building up a 305 is kinda like if Leonardo da Vinci painted the Mona Lisa on a paper towel.:mullet:

That's too much credit, more like toilet paper. Seems more fitting.

[wayneinclw]

well just go with the 350, hell just a few bolt ons, like the edelbrock performance package and you can get 400 hp easy.

[Just Dave]

Originally posted by corey r.
if you got a 305 to even run mid 14's N/A I would be impressed.


There's a guy that runs NHRA Stock class with a 305 TPI camaro. Remember, these cars can't have any port work, stock lift cams (crazy duration though) and pretty minor mods. His car goes low 11's and does crazy wheelstands at the launch. Granted its an expensive race only car, I just don't want it to seem like fast 305's don't exist.

[boostin97s-10]

Originally posted by Fordified
There's a guy that runs NHRA Stock class with a 305 TPI camaro. Remember, these cars can't have any port work, stock lift cams (crazy duration though) and pretty minor mods. His car goes low 11's and does crazy wheelstands at the launch. Granted its an expensive race only car, I just don't want it to seem like fast 305's don't exist.

That goes with any motor, It just how fast do you want to spend!, Give me enough money and I'll make anything fast;) There a guy in Cali that made a NA 4.3 all alum. motor produce over 500hp, but it was also a 11k motor with insane high compression ration:o . I think everyone just mean the 350 is more practical/cheaper to build;)

Example:

Flagship Marine celebrated its 50th year of manufacturing marine engines by introducing two new engines for 1996. The first addition is a 4.3-liter, throttle-body EFI V-6 rated 240 horsepower. This is a Vortec motor — an upgrade that offers the latest advances in combustion-chamber design. The payoff is substantial improvement in torque, reduced emissions and better fuel economy. This new V-6 generates as much power as the 305-cube V-8, which is the principal reason the old warhorse was retired. Not only does the new 4.3 put out more power, but, relative to other V-6s, it's both smaller and lighter. This means more power can be installed in a smaller compartment.