I have a crazy plan. I know I am gonna get a rash of crap.. But it is all good. Just do not tell me to go drive a Mustang....

I may be rebuilding the 305TBI motor in my 92 to be a kick *** little mouse just because I can.

Everybody wants an LS1 or Stroker. I wanted to be different. So with that said, I need manufacturer ideas.

Right now I am planning on:

GM performance Parts L31 Heads
Edelbrock Intake for Vortec heads
Roller Rockers
Forged Internals
New or Blueprinted TBI unit.
Comp Cams Camshaft

I do not have all the individual parts together yet. I am kind of stealing the idea from Chevy High Performance, however I want mine to be badder than what they did.

The trick here is I found that Whipple makes a SuperCharger for the 305 TBI motor. The engine I build will need to handle that... Just in case I decide to put it on.

 

I don't know why, but good luck.

 

What ever works for you

 

Sorry about your bubble, but people want strokers and LS1 for good reason, they make your car go fast. To each their own.

 

I would think it would be cheaper to just get a 350 and have more potential. A 305 is definitly not the best motor to make power with. If you are going to build up that 305 I would get rid of the tbi unit for sure.

 

It can be done. I know a guy over at fbody.com that got his 305 to run 11.47. I believe that was N/A but I could be wrong. I think you're money would could be better spent on a 350 or 383. A 427 small block would be really cool. Anyway if you're serious, heads, cam, intake, & exhaust are a good place to start. Then for serious power you could slap on a supercharger, turbo, or nitrous. Procharger makes a nice supercharger that you might want to check out. I would ditch that TBI unit though.

 

I'm glad to see someone building a 305. I know others have done it. I plan on doing the same thing this summer. So good luck. Long live the 305.

 

i love when someone posts about building a 305, all the smart-stupid people come out (yes smart-stupid, im making a new category of people here)

in exactly what sense would your money be better spent on a 350?
maybe you forget that all this car stuff, is just a hobby, that people blow there money on in the first place, reality check
and if the end result was all people cared about, then yer all stupid for startin out with a 3rd gen to build.... any sort of car out of

good luck with your 305 and merry christmas!

 

Well beside the fact that there is no replacement for displacement, a 350 will have alot more potential than a 305, and always make more power. So in the end you will get more out of the 350. It all depends on what you are looking to do if I was going to put out the money it would not go into a 305.

 

You can get more out of a 400 than a 350, more from a 454 than a 400, a 502 than a 454, a 540 than a 502, a 572 than a 540. See a pattern!!!! When, where, and How MUCH does it stop at? 305s make a great street performance engine and the TBI will keep it reliable and driveable after tuning!

The below combo will pull a 5,300 lbs VAN to a 15.5 @ 88.7 with a 2.2 sec 60 foot time. That is with a 2,800 lockup converter, 700r4, and 3.73 gears out back with P295/50/R17s on Impala SS rims.

My first crazy thing was to swap to TBI from a Carb, my second deviation was to build up a 305!!!(Why not I had a good 4 bolt main block in my garage) along with a set of ported 081s, and the accessories from my broken crank 355. Third was to put it into a 5,300 lbs FULL SIZE VAN, Finally the last was to run it at the track. The reward, Walking away from MOST of the Imports there.

I bet 99% of the people that say screw a 305 get a 350 have never even run a 305. If I started out with a 454, I would say forget a 350. 305 vs. 350 Lets face it, there is not that much difference even when BUILT up. I am running 1-2 tenths longer, but a couple of MPH faster than my old 350 was capable of. Passing from 40-100 is notably better with the 305. Me I'll take the couple of tenths and reap the added fuel mileage on the street. Gas costing 2.00-3.00+ a gallon gets Expensive, QUICK. 3-5 MPG is alot of difference (Per EPA rating and personal experience)

 

Well ya he could get a 400, but It will be more expensive. I built up a 305 a few years ago and I would not do it again. It was OK for a street car, if he is going to the track I would get a bigger motor.

 

I agree with the whole 305...350....400...454....and so on.

the point is, bang for buck, it's tough to beat a chevy 350. especially with vortec heads and extreme cams, there are to many proven combos out there.

I am all for being different, thats why I built a roller 406. I wanted to be different but I wanted to go fast, and no I haven't had all the money for it, thats why it's at the machine shop, that and I put the second ring upside down. yeah i messed up.

my point is if you are wanting to be different, thats fine, but if you are wanting to go fast, and be different, especially with a combo that's gonna cost more money, then you are going to have to pay.

I know for some guys, they want to say, yeah it's fast for what it is, I think that statement aggravates me more than anything. "It's a 2.8 liter V6, it runs 16.7 in the quarter, pretty fast for what it is" arrrrrrrrrrrrggghhh

you can not argue that a 350 for the same dollar amount is gonna whup on a 305. Just like my 406 is going to be faster, and the guy with the 427 small block is gonna kick my ***. You get the point.

People come up with ideas that they want to support on, then they go to the boards seeking approval.

for example, you can have a "built" 305 thats runs 13.7's or a 350 thats runs 12's for the same amount of cash. It's just an example go with it.

so what do you want, a 305 that runs mid 13's or a 350 that runs 12's?

All I know is when I step down on the loud pedal, being different doesn't matter as much as hauling azz.

 

Probably for the same cash that most could have a 350 in the 12s, I could put a 305 into the 11s. DIY helps alot, you don't have to have huge amounts of money, if you have time. Alot of it has to do with how you use the power as well and can put it to the ground.

 

The trick is that whipple s/c won't care if your engine is a 305 or a 350, just that the 350 will be making another 45+ hp (easily) on a 350.

 

I never thought this conversation would go like this....

The only time the car will ever see the track is for pure fun... Maybe once per year.

I know that a 305 with new heads, cam, exhaust, jet chip, hi flo tbi unit, and intake put out about 295rwhp.

Take that and add a SC for an additional 50%. If my math is right that is about 140hp more.... Add that to the 295 and BAM... 435hp... I think that is right...


The next thought is for those that believe the Camaors will be worth money. A numbers matching car should be worth more than one that does not have matching numbers. I will never get rid of this car. I still have every original part that has been upgraded. Just a thought for the matching numbers.

 

I like the WOW factor at shows....

You see an LS1 in a 3rd gen and go ok.. I have seen that before.

You see a 383 polished in a 3rd gen and go WOW... nice

You see a motor and most think it is a 350... they go cool.. You fess up to the 305 and WOW... Really Why... Conversation starts....

 

Here's the math in a nutshell:

Take out the 305, redo it (you'd be stupid not to). Send it to the machine shop, have it re-honed or probably bored. Do the rods with new hardware, blah blah blah, new pistons for blower this that and other.

Versus the 350 where pistons are more easily had, you can reuse the bottom end all the same (if you get a junker motor), the same machining processes will still take place and you will end up with 45 more cubic inches.

Not my engine so I dont really care which route you go with.

 

A 350 would cost less.

 

I personally like your idea. Mine is numbers matching as well, not saying that would be important in my case though. Emissions laws are ever tightening on us! With gas prices rising, I am getting the power I want, good low-midrange torque, from the least amount of cubes, keeping the efficiency high, pumping loses low, fuel mileage high, trying to stay reliable, and emissions low. My van is getting 18-19 MPG average and runs 15.5s @ 88, good enough for me.

 

Where do you'll come up with this.

Lets see!!!

$400.00=Core Long Block(Have yet to see one for less in DFW)
$125.00=Boring
$050.00=Cam Bearings
$100.00=Block Prep
$300.00=Quality Rebuild Kit
$400.00=Cam and Valvetrain
$800.00=Good Set of Heads
$150.00=Good Intake

Go with his existing 305 roller block, (Didn't state mileage)

Maybe a bore?
Cam Bearings?
Block Prep?
$300.00 Good roller cam and springs
$450.00 Vortec Heads (Know a yard that sells them $100.00 a pair)
$200.00 Vortec-TBI intake
$300.00 Good Rebuild Kit

 

Check out Chevy High Performance magazine's web site. They did a build up of a 305 in a 91 rs which they said smoked a cobra mustang. It's your money, so do what you want to with it. I like the dare to be diferent attitude. Keeping the T.B.I. unit will limit your cam choice to around 212 for the intake and 221 for the exhaust dur. figure. That with the fuel injection unit will give you performance with fuel economy, which is becoming important in this day and age. The only reason to build a 350 is if 1/4 mile numbers are the most important thing in the world to you. The magazine article will give you a clear idea as to which parts to use and what kind of results you can expect. I hope that helps you out. Happy Holidays to all.

 

146000 miles, NO LEAKS AT ALL...

No compressions loss anywhere
Synthetic oil
New Intake manafold gasket

All other parts still original

 

I have that magazine. I thought the idea was cool. I do need a machine shop involved to do any of that work. The trick here is to fand a shop worth trusting.... I have had my fair share of bs shops around here.

 

Since your dead set on it.
Like mentined a 305 can be a good performer. remember though the fuel and spark are managed by the computer and the more radical you go prom tuning you will have to do. Do some research in the DIY prom board before you get too carried away with go fast part. Good Luck!

 

One of the best ways to find a good machine shop is to go to the local dragstrip and talk to as many of the drivers as you can. Ask them who did their machine work and who'd they recommend. Sooner or later a pattern should develop as to who does the best work. Then you'll know where to take it. It'll probably cost more, but good machine work is worth every penny.

 

Heck, if all you want is conversation, make up a story
Spread it around but put your money in something worth doing, not a poorly designed "305"
By the way, that 11 second 305 did have a blower.

 

Since when was it POORLY designed. Same design as a 350 that you'll preach. It was designed to give a heavy car with a 2.xx gear, 3 spd automatic, good overall power for the time, better mileage than a 350, and lower emissions. It did all very well. If it wasn't for the 305 and other similar engines you probably wouldn't have a V8 now!!!

 

I'm suprised no-one has linked him to my threads...anyways, click the "HOW???" in my sig.

 

For all the people that come on here wanting to "be different" and build a "badass 305" there must be a ton of different people out there with badass 305 thirdgens.

 

My belief is that you can go to radical very easily. After you build the hot 3xx or 4xx engine you absolutely must consider what is going on in the rest of the drivetrain. A T5 will not hold a well prepared 350 or larger, and the 7.5" differential will not be much more capable. To me there is the constant overiding factor of $$$$.The old proverb still proves true that more dollars = more power =more broke stuff..unless you can afford to beef up the entire drivetrain. Then consider LCAz. SFCz. torque arm etc,etc.you are only getting started with the engine. There is something to be said for sticking with a 305.

 

Also here is a link www.goingfaster.com/spo/modthel03.html

 

LMAO @ Black Echo link

 

I swear that people make these threads just to **** people off. They always talk about this super 400hp tbi 305 there gonna build and never do it. They throw in a couple links, talk about that magazine article they read, and how they heard from a friend of a friend who did it. Just build the damn thing, then come back here defending it. Basically, your just bench racing right now, something most people will not give you respect for. Now go out in the garage, do it, and make all of us nay sayers eat our words

 

shoot, i already did it! 13.03@103mph with an n/a daily driven 305!

 

I know, but this guy makes it seem like hes the only one who has ever thought of getting some decent hp outta a 305. Theres atleast 2 threads a week exactly like this one. I think Karps says it best A lot of his reasoning does not make senese, like wanting to build a blown 305 outta a stock, 100,000+mile engine.

 

So am I. 400 hp 305...............

at 7200rpms with a 244 deg@.050" cam. Yeah, that's streetable. Good luck with your build.

 

Yea that cam would do real well in a TBI 305, should get 20 MPG too.

 

224/224 on a 114.5" lobe sep works very well in a TBI 305.

I have already built it and drive it daily with good fuel mileage and excellent driveability. 280 RWHP through cast iron manifolds says alot.

 

C'mon guys, it would be a BAD *** 305! Imagine going to car shows, and the guy comes to you and asks you whats under the hood. Hes gonna think your g o d when you say a BAD *** 305!

 

So far I have seen only one person brag about his 305. All the shows I go to here. Everybody goes with a crate motor and does nothing else. Not to original. We all have different ideas, but this thread started with help on part and companies to choose. Is Edelbrock better than GM Performance? Is Crane better than MSD? These are things I do not know.

As for the high mileage, this motor will be rebuilt from bottom up. There will be no used parts on it or in it.

How many Camaro owners can say... I will never sell my car. I can! I have had it in my family since it rolled off the lot in 1992. The only way this car will ever leave my family is car accident or the IRS steals it.

As for dude with the 305 bragging... I am going to check that out now.

 

Look this has been done before and COVERED numerous times. As said just look at mw66nova's project for some details. He has gotten some very respectable numbers. And from what I've seen, most people don't go with crate motors hear. They build them themselves, exactly like what you plan on doing. They just use 350's instead of 305's, mostly due to the fact that they want more hp instead of being able to say its a 305, because apparently thats more respectable and bad ***.

 

I am guessing you are talking about mw66nova or myself. His 13.03 is very IMPRESSIVE. Just as I feel that my 15.5 in a VAN is.

 

The only way anyones getting my baby is if its stolen!

Ill sell the other black turd i got after i get the parts i want out of it though...


I was thinking of doing something with the 305 in the turd just for kicks and giggles before i get rid of it though. I was going to try the ghetto roller cam setup in it, no loss if a lifter spins though, its only a piece of junk motor.

 

LOL

 

Yea I'm actually gonna be buried in my car when I die, lol. ITs been stolen once, and that still wasn't enough to make me get rid of her. Blown trannies, motors, and an accident, and I still own it. I gave full credit to nova, but think of the time he would have lost if it was a 350

 

My wife says...
........................bury me in the car
.......................she will divorce me if I sold it
.......................not allowed to will the car to another party

 

It can when the LSA is that high. Whats the lift on that cam grind your running?

 

.450/.461 but I use a 1.6:1 rocker arm. That is about .480/.492". This particular cam (Mellings C-410P or L82 Corvette) idles dead smooth at 700 RPM with 15 in/hg of vacuum on the gauge. It has a slight exhaust note to it with the transmission in Drive, but other than that sounds stock. It is also a little lumpy after a cold start. Power-band is 1,800-6,000.

 

I relate the 305/350 arguement to being in a bar and seeing 2 women at the table across from you. One is pretty hot and any guy in the bar would want to sleep with her, the other well not so much. Now sure you can go ahead and not be like everyone else, spend $50 on drinks, dinner, etc and nail the ugly chic. Heck it might be fun, and you'll definetly be different. But wouldn't you rather do the hot chic even if it costs you only $10 more in drinks?

 

Oh man, karps ta thats sig worthy, can i use that?!!!!