Nelag

I have never driven a 300 or the 350 hp. I guess I should just never drive the 350 h p. lol. But seriously if the engine needed some work for some reason and it was out or open up is it possible to bump the hp ?


Thanks.

3154tm

Stroke it!

silver837

You could use oem parts and go upto 365 HP with the solid lifter 30-30 cam or 350 HP with the l-79 hydraulic cam and the 11:1 pistons .

427Hotrod

Cubes...and better heads. The power is in the heads.....then cam it to match.


JIM

silver837

The amount of performance you want is easy to find. It's just money.
If your wrenching ability is limited the blueprint engines are the way to go .

C2CorvetteBob

For the money, a Blueprint 350 or 383 is the way to go. I wanted to keep my original 327-300HP engine so I put in a 350 crank rods and pistons ported the heads and intake manifold and an Isky 262/270 which is a little milder than a 350HP cam. A better street cam in my opinion.

silver837

Another way to go . The possibilities are close to endless.

anyChevy

Easiest and cheapest is probably just top end, if the bottom end is still good, compression wise.
Then swap Intake, cam, heads, carb, add headers and recurve distributor.
Get the combination right and it'll make an easy 350 + HP
Edelbrock have compete kits.
I would use the intake that retains the oil fill tube and paint it all orange, or leave the intake natural and add finned alloy valve covers.

https://www.edelbrock.com/e-street-t...hevy-2022.html

69L88

What are you starting with? If you have a matching numbers, unmolested engine C1 or C2, you need to think carefully about ANY modifications as they will detract significantly from the value of the car. However, if you have a non-matching numbers car, then as other have said, the options are virtually unlimited.

Keep in mind that the more power you put under the hood, the more stress and strain you will put on the drivetrain south of the flywheel so know what shape those components are in.

Restrictive exhaust will choke down any engine so consider beginning with a set of headers and freer flowing exhaust. Better heads are the next logical area of improvement. Aluminum is a good choice. A higher performance cam is obvious but will need to be carefully selected, depending on other modifications you are contemplating.

ChrisBlair

If I recall correctly, aren't the rods in a 300hp engine different from those in the 350hp example?

Bluestripe67

Answer some questions first. Is the engine original to the car, how do you enjoy/drive the car, what are your mechanical skills and does money concern you? Dennis

dcamick

Great questions.....If yes to originality: Replace the 327 with a higher HP replacement. Save the Original..... JMHO!

Nowhere Man

another option is to change the rear gear to a 4:11 it will make it feel like it has more power but can negative impact on other aspects of driving. haven driven both they both have their pros and cons. but I doubt the L79 of 50 more horsepower will make you happy.

Nelag

OK. Thanks for all the replies.

I get the picture now. I was/am considering a purchase with a 300 hp.

Yes, money can solve/give me more power, just have to have/spend it. lol.

OC-1

Change the rear gears for seat of the pants feel.
Aluminum intake to reduce weight and some efficiency
pocket port the heads
recurve distributor
L82 cam advanced for 327 displacement..equivalent to the 350 cam

otherwise any of the suggested strategies will do along with eagle or some other aftermarket rods,. go blueprint

jim lockwood

Early 327 rods are known to be weak. Late 327 rods (1966-ish?) incorporated an engineering change which made them stronger. It wasn't a horsepower thing.

jforb

Drive the car for a while, and see how you like it. I'm always pleasantly surprised how fast my 250hp 62 feels....even though it's almost 5 seconds slower in the quarter mile than my other 62 Chevy!

ChrisBlair

I understand that rods don't make hp. But adding power to an engine with less than satisfactory con rods....well, my philosophy has always been- make the engine support the hp you're looking for before you break it

jim lockwood

We are in violent agreement but I think you missed my point.

My point was that once Chevrolet made the engineering change which beefed up the rods, ALL engines got the stronger rods. They didn't put the strong rods in only the higher HP engines.

Westlotorn

The 300 HP 327 is no slouch engine, they run strong and are pretty tame to drive. A simple late model aluminum head swap is a bolt on 30-40 HP. As mentioned exhaust improvements also help. Keep in mind improvements to the stock 300 HP engine will move the satisfaction curve some, If you are always putting around town at less than 4,000 RPM putting in a cam that pulls hard from 3,500 RPM up would not feel stronger. If you are racing 1/4 mile races you want a cam that pulls hard all the way to 6,500 RPM or more. Have a clear picture of your actual desire before making changes.