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How do I get more horsepower out of my 305 Chevy engine?
Bolt-on Upgrades
- Replace the exhaust manifold. The stock exhaust manifold of the 305 engine restricts air flow from the engine increasing back pressure.
- Replace the intake manifold and carburetor.
- Add cold air induction.
- Replace the computer chip.
Is the 305 Chevy a good engine?
Is the 305 Chevy engine a good option? The 305 Chevy engine has a lot of potential as a good engine, with a lot of options and customizations that can help to increase overall power. Though it may not compete as well with larger-displacement engines, it can still deliver plenty of power, despite its smaller bore size.
How much HP can you get out of a Chevy 305?
I completely agree that a 305 can be built to make 450 hp. That’s not too difficult. The engine is limited to smaller heads with 1.94-inch valves because larger 2.02-inch valves won’t clear the cylinder wall.
Will 350 Vortec heads work on a 305?
There’s both 350 and 305 vortecs. Heads from both these engines would physically bolt on to a 305, but bolting a set of 350 heads onto a 305 would hurt performance more than anything. The heads off a 305 vortec are actually pretty decent heads for a 305, and if you’re set on vortec heads, those are the ones you want.
Why is the Chevy 305 bad?
The primary problem with the Chevrolet 305 engine is the narrow 3.736 bore, which results in insufficient airflow compared to a larger block. Upgrade the air filter assembly with a modern unit to let the engine “breathe” more easily on the intake.
How do you change a cylinder head?
Cylinder Head Replacement Procedure
- PART 1: Cylinder head Removal.
- Drain the Coolant and Oil.
- Remove the Engine Intake and Exhaust Manifolds.
- Detach the Rocker Arm.
- Take off the Old Cylinder Head.
- PART 2: Install the New Cylinder Head.
- Replace the Components.
- Refill Coolant and Oil.
What is the best Chevy 305 head?
Imho, the best 305 head is the -601! They have 1.84″/1.50″ valves; hardened seats; a compression chamber that will run from 53 to 58 cc’s SO you HAVE to cc them!! 160 and + cc intake ports and best of all, chambers that are like the old -461 “fuelie” head that are double-quenched!! I have a set of both so know!!
What needs to be changed on a Chevy 305?
Also, early small-blocks must switch to ’87-and-later center-bolt valve covers and late-model guided rocker arms. The heads’ 64cc chambers must be milled to avoid compression loss on a 305, and the larger-diameter chamber outline requires 350 head gaskets, which could also cause reduced compression.
What size head gaskets do I need for a Chevy 305?
The heads’ 64cc chambers must be milled to avoid compression loss on a 305, and the larger-diameter chamber outline requires 350 head gaskets, which could also cause reduced compression. To solve this, we milled the heads 0.045-inch and used thin 0.015-inch head gaskets and got just over 10.0:1 compression.
How much does it cost to replace a 305 cylinder head?
For this type of application, World Products offers 305 S/R Torquer cylinder heads that may save you some bucks. They run about $599 complete from Aerohead-that’s more than the GM Vortec heads, but the price may only be higher if you’re trying to duplicate our 305 engine combo from scratch.