86yellowirocz

I'm going to build up my 305 and get great numbers out of it just to show people that you do not always need a bigger motor to go fast. If you have ideas for the 305 project put them out there. Now I don't mean to be an *** but every time I see someone talking about fixing up there 305 with in the first 5 post someone says put a 5.3 or 350.

Fallen2603

http://www.superchevy.com/technical/...et_system.html

http://www.popularhotrodding.com/eng...cks/index.html

Don't know if you consider these "great numbers", but I think they're plenty healthy for a street car. Good luck with your quest!

86yellowirocz

I think in the 400-450 range in good target. Not the fastest but faster then most

Guest

TGO and 305 rebels. Like peanut butter and bacon.
You're not the first to want to prove the 305 ability, and you won't be the last. But as of July 30, 2011, the 350 will still give more bang per buck, even with the extra $150 to get the 350. And most of us don't see this changing in the near future.
Have fun, good luck, yadda yadda yadda.

jkrustchinsky

you prbably dont have enough money,

86yellowirocz

You don't know me. So until you do, don't talk ****.

Benjam88

Yeah, the 305 can be made into a fire spitting little motor. But most people don't want to dump a lot of money into the motor. You see the words "Budget Build" thrown around here a LOT. Its easier to squeeze more power out of a larger displacement motor or motor with more technology, with less money.

Guest

You boast to us about how you're going to show us how to build a king god of engines from a 305, but over in Tech / General Engine you're asking us which heads are best? Maybe I'm too tired from work today, but that seems a bit incongruous to me.
How are you gonna show us if you don't already know every detail of your entire build? This is looking like what everyone else does.
Google the "Hate Me" 305.
LG4, EQ Vortec heads, Comp XE268H10 cam, RPM AirGap, long tube headers, 372 HP at 6100 RPM, 350 TQ at 4500 RPM. 320 TQ @ 3000-6100 RPM.

NathanLewis

You can build a 305 to a decent street engine, but in the end, a guy(or girl) with a 350 putting out the same numbers will still stomp your *** everytime.

You aren't proving anything but just another rebel trying to act like the 305 is a good engine. It was made for what it is, a gas saving, low performance engine.


I'm a complete noob in engines but even I know 350 > 305.

torque_is_good

you are absolutely correct. There are engines today that are in family sedans and coupes for $21,000 that you can drive all day with the A/C on, they will sit in stop and go traffic and make 1.3 to 1.36 HP per cubic inch. One company, Honda has been doing it for years. They can get 190 HP from a 146 cubic inch engine, transport 5 people and get 32 mpg.

The new 5.0 from Ford makes 1.36 HP per cubic inch and the new 6 banger is 1.35 HP per cubic inch and those are all without mods and are factory.

So, what's their secret? Well, Ford learned form the Japanese and as much as people like to poke fun at VTec that is the secret sauce. You need 4 valves per cylinder, overhead cams, and variable cam timing using the pressure of oil. Direct injection is not always needed but does help. Much science goes into the combustion chamber as well.

So, with the older OHV design and off the shelf parts available, there is no replacement for displacement. But who knows, maybe you are the next Felix Wankel who has a radical design and can get over 200 streetable HP from 1300 cc's

87_305

Put a 335 forged stroker kit in it with the TFS 305 heads and first intake with a turbo.
Edit: fixed spelling of stroker. Damn auto correct blows

Guest

Not to get far off topic here, but this isn't very impressive when you consider that the bigger, heavier '98-'02 Z28 w/ T56 could do 31 MPG highway ( real world, not EPA rating ) with 346 ci, and cary 4 people, and unlike the flyweight Honda, put down over 300 HP at the tires, and run high 12s right off the showroom floor.

torque_is_good

but we're not talking a 5.7 liter. The OP wants to do it with less displacement thus why I showed how it has been done by other companies.

We can't mention anything above 5 liters

freaky

i'm gonna build mine with vortec heads a better cam an then throw a blow thru carb on it an a mp t70 turbo . i'm guessing sumwhere around 400-450 hp . then comes a better tranny an rearend to support this . everyone is telling me also to jus go 350 or even big block . but i figure if a 50 trim turbo on a 2.4 liter 4 cylinder got me close to 400 hp then a 5.0 should be no problem . 400-450 is all i need personaly ,that makes for a fun toy .lol good luck with your build ...

rusty vango

excuse me, but its time for a geezer to speak up.once upon a time there was a little chevy small block, it was a 283 and even tho ancient technology was used, BIG swinging ***** it had. AND we didnt have any roller nothing! no aluminum heads, no synthetic oil, no fuel injection, no modern power adders. AND we were getting a healthy 400 horses way back then. SO why do these bozos think just because its small its no good to build?? take a lesson from the past

LS4GXP

iTrader: (2)

From experience, I also went H/C/I on a 305 and could barely hang with my friends 350 with a mild cam. If you have money to waste, go for it, no one is stopping you. If you want 400-450hp, i would start thinking turbo, S/C, or NOS, N/A will be hard, but do able. And if you achieve the N/A imagine how much power you could have got with a 350 with the amount of money spent.

How about this....Build a 350 and just tell people its a 305....lol

SKELITOR117

iTrader: (3)

For starters, New highflow headers, y pipe, cat (if you have one) and the rest. Ultamate TBI is a good idea to. Look it up in the tech articles.

Fallen2603

And to all the other 305 haters...what about that little SBC 302? Yeah, that was a terrible motor. Yeah, it has a bigger bore giving a wider combustion chamber giving you more room for bigger valves. He may not make a "God-305", but he can make one sweet street engine if it stays naturally aspirated. Throw boost into the equation, and he could have a Demi-god 305.

And on a side-note, why is it that all you guys feel you have to voice your damn opinions, anyways? Especially, when he already knows what you're going to say and choose to not listen to it, anyways? It really annoys me when you try and act like someone's father on a ****ing forum. Let him learn for himself if he is wrong in making hot 305 motor.

Guest

First off, you need to understand what you're up against, and why. Know thy enemy, revel in it's successes.
When I was a teen, finding 350s wasn't so easy. But now, when I go to the salvage yards, it's 305s that are NOT there. Every Chevy pickup there has a 350 under the hood. And there are usually a dozen or more to choose from.
And finding a third gen or Nova or Malibu or Caprice or Monte C with a 305, those seem to be gone as well. Most of the 350s may already be 30 over, but most of the 305s have been scrapped.
Your third gen may have come with a 305, and it may be 5 liters like the Ford 302, but spending $200 for a 350 is mighty appealing. It's not just another 15% more displacement, either. It's also greatly reduced valve shrouding. And room for larger valves.
Compared to any of the successful 3, 4, or 5-valves-per-cylinder heads on any of the more modern engines, even a 1.94" valve in a 305 is still far short on relative window area.
The Ford 5.0 has the 4" bore. It breathes better. Even the 283 had a 3.875" bore, and for serious performance builds, those could and did get bored to 4.00", making 301 ci. My uncle was one of the many guys who did that.
Study the old threads of this forum. Lots of V6 cars have had 350s swapped, and many 305s have been scrapped for 350s. So building the 305 isn't just building the underdog, it has become building the rare underdog. 350s are easier to get.

86yellowirocz

Thank you

Guest

Hypocrite. Look at you, venting your opinion, trying to be all fatherly.

88gta3508

the 283 can wind up 6K - 7K RPM all day long!!! the 305 1.88 1.5 TPI smog heads are never gonna support that power or flow... the TPI low RPM system is a killer for power... the small lil cam for the TPI 305 will be lucky support 300HP... bottom line it's gonna take serious money to build a 400HP TPI 305
it's not the 305 it's the TPI & heads that are the major setback

PS the 302 has a 4.00 bore and 3.25 stroke that loves to windup to 7K

Fallen2603

ronnjonn,

Not sure that was an opinion. Pretty sure it was a what I would do in your sitaution. I think that's a statement of fact or purpose. Either way, I've removed said questionable material because it could be construed as an opinion.

Trying to be fatherly? Pish! I'm pretty sure you're doing enough hot air moving to accomplish that task.

88gta3508,

The Chevy 302 has a 4.00" bore with a 3.00" stroke.
The Chevy 327 has a 4.00" bore with a 3.25" stroke.

86yellowirocz,

Good luck with your 305 build, and don't expect to get much help here. PEACE.

SKELITOR117

iTrader: (3)

Ok ok. Let’s just get this straight. THE 305 IS NOT A HIGH HP MOTOR! IT WAS NEVER MEANT TO BE! That is not an opinion that is a FACT! If you want 250-300hp and 345-385lb tq, that’s fine. But 450hp is hard to achieve in a naturally aspirated 350, and still be street able. You will have to have a turbo or two, maybe a nice expensive supercharger if you want that kind of power in a 305. Even though a lot of these 350 guys are a bunch of total high and mighty A**H***S (I'm just saying in general, I am not talking in specific, nor is this a reply to any posts made by 350 supporters here), they are still right. These guys know what they are talking about, and to deny their wisdom would be foolish. I mean this not to insult you but to inform you and help you. You should not attempt to get that much hp out of that motor. You will be wasting money and time. Best of luck to you.

torque_is_good

it all depends on how radical he wants to get. With enough money, quite a bit is possible. Of course if the OP had that kind of money then he/she would not be posting in this forum, he/she would be paying someone to build a potent 5 liter

88gta3508

YEAH yeah yeah @ work in a rush never the less 302 327 are performance 2.02 heads compared to 80's smog

odecca

I was just loggin in to find out why the ford 302 is such a great engine (had one in a truck in the 90s), and why the 305 is not. Great timing on this post.

For me, I am looking to do a few things to get a little pep out of my 305 while I wait on my 350. Don't know how long that will be but if I tear up my 305 it is not as big a loss. Great practice in the meantime.

I agree with all of you guys on this topic. The 350 is a much better option, one thing that was not mentioned was parts availability. However, I also agree with the poster, let him try it. Yes he could save a lot of money by not going there, but hey, it's good for the economy. And if the things blows up, hopefully no one gets hurt and it was only a 305 anyway.

torque_is_good

it depends what criteria you use for

302 being a great little engine

305 not being a good engine


if you mean getting power from one then you do realize that you can get power from a 305. The reason people go to the 350 block is for the same price of upgrade parts you stat with 45 cid more.

Interchangable parts make it a possibility and keep costs down

personally i have no issues with the 305. They can run for a long time and give you years of service.

If I had an old 302 and an old 351 then I'm going to use the 351 ford because I'd be starting with 49 cid more.

But, forget the nonsense of 30 and 40 year old technology. I like dual overhead cams with variable cam timing and direct injection. You can't beat modern technology