Not sure if this is the right forum but.. I'll give it a shot.

Many of the local car enthusiasts think that 402meters is boring and prefer tight tracks and such.
(ok, I know that this is a strong argument to get something else than a thirdgen camaro but.. why be like everyone else?)

So is there any major difference between the 305 and 350 engines in this case?
Is the increased weight of the 350 causing a lot of understeer?
Could you get more rews from the 305 without big modifications?
Anything else?

The gearbox will be a TH700 and for the sake of discussion we can assume stock suspension.

And also, the primary task of my car is to bring me women. This means that complete rollcages, ripping out interior and such will not happen.

 

The 305 has a smaller cylinder bore.

The 305 and 350 are similar in weight, not a lot of difference.

What kind of revs are you talking about?

"Many of the local car enthusiasts think that 402meters is boring and prefer tight tracks and such." I'm lost here!

 

About rews well.. The more revs usually means less gear changes so basically, is it easier to modify one of the engines to rev higher?

"Many of the local car enthusiasts think that 402meters is boring and prefer tight tracks and such." I'm lost here!
402 meters = quarter mile = drag racing
"tight tracks" usually means finding a big parking lot (or simular) and placing gates there, making your private race track. There are some trackdays arranged as well that are popular.

Hope it's clearer now

 

You want the 350. The bottom end of the 305 and 350 weigh the exact same (some 350's weigh less since there is less mass in the block due to larger bore and different water jackets). If you have two identical set-ups (same heads and cam and induction) on a 305 and 350 the 350 will make more average power and make it sooner in the powerband. The 305 may have a similar peak power but it will be at a higher RPM point. Higher rpm's aren't always desirable due to extra wear and stress on valve train components.

Setting up a car for track racing is too vague. Some tracks necessitate low powerbands and others need you to be able to stretch the cars legs. With the 350 you get a wider powerband. You can build both to rev but since it is cheaper to build a 350 than a 305 I wouldn't want to pay more to get less. Also, the more cubes you have the more potential you have to make power.

 

right on the 350 will get you your straight away speeds

the 305 will probably pull out of a corner better because the 305 is a low end torque motor where the 350 can rev to 5500-6000 easy

 

A complete same build 305 VS 350.......... The 350 is going to stomp it in the torque factor beings that it has 45 more cubic inches them the 305. Why do you think people build 383's??? The extra 30 cubes makes more torque....... I have built several 305's and while they were screamers in the top end they had nothing down low. You could get two bigs guys in a 305 car and there goes the whole thing it feels like a dog.

 

Dennis you don't really think you're going to have the first ever 12 second NA 305 do you? And yes a 350 weighs less and will rev higher than a 305, more room for larger valves, more capable of utilizing larger heads, weighs less, it's a win win win but the 305 isn't a bad engine if you already have one, you're just working with a handicap. I certainly would NEVER pull a running 305 to exchange a 350 in it's place, I'de run the little 305 to the grave before that.

 

yes thats right there are no STOCK bottom end 305 fbodys running 12s that are all motor

the 305 is all torque bottom end motor my car damn near jerks the left front tire off the ground but it has no mph in the traps

the 350 pulls harder up top because it doesnt have beer can pistons

small bore big stroke motors like the 305 will launch harder than its big brother the 350 but the 350 will pull away

 

So nothing beats cubic inches?

Intresting info guys, i read somewhere that the 350 was heavier than the 305 wich would cause a lot of understeer.

Anyway, the chase is on for a v8 now. Too bad they are rare here in Europe.

Thanks for the help!

 

dennis myself and others have ran stock bottom end 305s into the 12s, heck i've sprayed mine into the 11.60s mw66nova has a low 12 second 305 as well from these boards N/A. Stop spouting out lies on the boards about 305s having more torque than 350s down low or posting that a 305 is only a low end torque motor. Every motor reacts differently to heads/cam and some super stock guys are spinning 8k RPMs through the traps out of a 305.

 

I was waiting for that to happen.

 

Just what would cause a 350 to be more heavier and have less torque then it's little brother? LOL I think you need to go back to school some more about engines.

 

In a nutshell yes. Basic IC engine principles dictate this.


That is just a misnomer. The external dimensions of all Gen I and II small block chevy's are the same. It is the internal bore and stroke that make up the displacement difference. There are varying factors though that can make one small block weigh more or less than another. Bore, block style, head material (cast iron vs aluminum), material of pistons, rod crank, ect. Induction also can affect weight. A simple carb set-up will likely weigh less than a big LT1 or steathram intake with fuel rails, injectors, ect ect). In the end though we are taking about tens of pounds difference. A big block on the other hand is heavier. In addition, newer Gen III and IV mills are all aluminum and are lighter. A 408ci LS2 will weigh far less than a 283 Gen I small block with iron heads.

 

Rectangular dollars.

 

hmmm, maybe that's why my tbi 350 just hasn't impressed me yet. I can tell it's faster than my 305 but it just doesn't throw me back in the seat much more than the 305 did.

 

Your 350 will make more torque througout the power band period. Tune it up and do the free mods to it. A 350 simply has more power potential all around.

 

This is a thread I made last night trying to get help about this problem..tells my seteup too.

https://www.thirdgen.org/forums/tbi/...-new-post.html

 

He was talking N/A though ...not with giggle gas. heck a stock LG4 here in our club went 10's on the bottle ( just a cam swap) . 12's are easy

 

Regardless he's got a long way to go from a 13.7 at 99 to 12's without a power adder. I'de like to see it happen, but he won't be the first stock bottom end 305 to hit the 12's w/out a power adder, I'm sure someone on here has done it, if they haven't congratulations get to work. As for a 305 being superior to a 350 in some way, it's not true. A 350 will make more off idle torque, has a larger bore so it can sport larger valves providing more revs, and will accept a larger cam without getting all slobbery on you. For that matter a 383 will do the same as long as you use a long rod to keep the piston side loading low.

 

eh hem! i've got an n/a 305 that's been 12.31 @ 108mph, and it's got a 4000 stall converter and is shifted at 6K, so it's not exactly a torque motor, though because the way the car is setup, it will daylight the tires. my 350 that this 305 replaced 60'ed WAY better. AND it had the mph to go well into the 11's. the motor just made more power all the way around, and the ONLY difference between this 305 and the previous 350 was the cubic inch size!

just fyi, the stock eliminator guys that are running low 11's and high 10's on motor with a 305 are running 5500 stall speed converters and 5.30+ gears, and shift at 8500rpms, so if that ain't a high winding motor with NO torque, i don't know what is...

 

i'd go with the 350,possibilities are endless, like previously stated they weigh about the same, the only reason i'm running a 305 is because its what came in the car its still pretty fun with a t-5 behind it and after gears, posi,headers and maybe some 1.6rr's it'll be plenty fun for what i do with it.

 

in short 305 < 350.

Same weight, and more power everywhere with the 350, period.

Nothing wrong with a 305, but i would never replace a 350 with a 305 thatd be backtracking. Nor would i ever build a 305 when a 350 costs the same.

 

hey if ur big on running autox and handling, check this out.

a 300hp 4.3 liter chevy that is light as hell, has great midrange, and would be a great motor with some gear and a 5 speed. high revving sixxes sound sexxxy, and the bitches and hos will be all over ur nuts when ur thirgen sounds like a skyline and whoops on L98 cars and gt mustangs.

http://www.compcams.com/Community/Ar...p?ID=232019365

check this out, this motor was reviewed in car craft back when freiburger was a reporter, and it'd be sick in a handling or drift application, and could be juiced for straight line performance.

 

It took open long-tubes and a dyno tune to hit 300 hp at the crank. I'm pretty sure that a full exhaust, accesories, and drivetrain losses, would only net you about 225-250 at the wheels.

 

yes sir, cause we all want the hoes that get naked for a 13 second truck motor. herpes and krabs, anyone? anyone?