Can I put Vortec heads 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.

How much HP does a 305 Vortec have?

The Chevy 305 Vortec engine uses a sequential electronic fuel-injection (SEFI) system. The engine runs on regular gasoline. The fuel tank has a capacity of 25 gallons. It has a peak horsepower of 230 hp at 4,600 rpm.

Are Vortec heads better than double hump heads?

Types of GM Vortec Heads The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

How much horsepower does Vortec heads add?

Most of these small block Chevy heads offer a power increase of around 40 hp, and even the iron Vortec heads were worth 20 hp over stock. The two best small block Chevy heads in terms of peak horsepower were worth more than 60 hp.

Will a 350 intake fit a 305?

Everything fits the same it’s the same block you can’t tell the difference except the 350 sticker on the valve covers. I did the same swap but put a performer manifold on. The 305 /350 bolt holes are identical to the thread.

How much lift can Vortec heads handle?

The factory Vortec heads use a light, single-wire valvespring with a damper that generates between 70 and 80 pounds of load on the seat. Because these heads are meant to work with a 1.5:1 rocker, their tall valve guides can only handle maximum valve lifts of around 0.420 inch.

Is it worth it to port Vortec heads?

Your question relates to porting the Vortec heads to improve the flow, which is a great idea. The Vortec heads offer great intake port flow despite the rather small 1.94-inch valves. Where you can gain substantially more power is by concentrating on the exhaust side of the head.

What is the bore and stroke of a Chevy 305?

The stroker 305 is popular because the 305 small-block is probably the most easily accessible small block Chevy engine on the planet. As you mentioned, you bought this motor for almost nothing-that’s the lure. The 305 uses a tiny 3.736-inch bore and the same 3.48-inch stroke as the 350ci motor.

Can you stroke a Chevy 305?

Also, all 305’s have two bolt mains. It is possible to use a 400 crank in a 305 to stroke it, I’m pretty sure it comes out to a 331, somebody sells the kit. However the small cylinder of the 305 limits the valve size you can run and shrouds the valves much more than a four inch bore.

What are vortec heads?

1 Answer. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Originally, the stock #906 casting head was available in two versions.

How much horsepower does a 305 chevt TPI have?

Run with a Holley HP ECU, the modified LB9 305 produced 372 hp at 5,900 rpm and 353 lb-ft of torque at 5,000 rpm. The 305 was already off to a good start. Boost for the modified TPI 305 engine came courtesy of the gang at TorqStorm.