The ’96-’00 350ci Vortec 5700 engines enjoy lots of aftermarket support to help improve the
255 hp
and 330 lb-ft of torque they’re rated for at the crank. An engine swap can be quite costly, so putting even a quarter of those funds into your Vortec 350 engine could get you where you want to be.
What is the max lift on Vortec heads?
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
.
How much horsepower can you get out of a Vortec 350?
The ’96-’00 350ci Vortec 5700 engines enjoy lots of aftermarket support to help improve the
255 hp
and 330 lb-ft of torque they’re rated for at the crank. An engine swap can be quite costly, so putting even a quarter of those funds into your Vortec 350 engine could get you where you want to be.
How much lift does a stock 350 cam have?
The Chevy 350 has a hydraulic camshaft and hydraulic lifters. The intake and exhaust valves have a duration of 218 seconds a 0.5 rpm each. Both have a
valve lift of 0.457 inches
and a total duration of 268 seconds.
How much horsepower does a cam add to a 350?
It holds the valves, valve springs and the intake and exhaust runners. A new cylinder head comes with bigger valves, intake and exhaust runners with smoother sides for better airflow. It should be matched to a new camshaft. This fix will immediately add
100 horsepower
.
How do I get more power out of my 350 Vortec?
- Modify your air intake. …
- Modify your exhaust. …
- Change your camshafts and valve train. …
- Purchase new cylinder heads, or have yours ported and polished. …
- Have your motor rebuilt and blueprinted.
Is the 350 Vortec a good engine?
The
350 Vortec is a great motor
. It’s a shame they only offered it in the trucks for 2.5 years.
How much horsepower can Vortec heads handle?
The original answer was related to modifying the heads to accept more valve lift. Our original answer combined the Chevrolet Hot cam with a set of these Vortec heads. Our estimate then and now is
around 350-375 horsepower
. Your question relates to porting the Vortec heads to improve the flow, which is a great idea.
Are Vortec heads worth it?
The vortec heads
make good power
– if you are running upwards of . 500 lift- yes you will need some machine work – but they work good. Not sure who makes the Speedway heads or if they are imported of not.
Are Vortec heads better than double hump 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 a Thumpr cam add?
The Thumpr made the highest peak torque, the highest average torque, the highest overall average power, the best average numbers between 2,500 and 4,500 rpm, and the best numbers from 4,500 to 6,500 rpm. It made
396 hp at 5,900 and 418 lb-ft at 4,200
with the Vortec heads.
How much horsepower does a Stage 3 cam add?
Summit 8710 Stage Three Cam:
549 HP and 492 LB-FT
.
What does cam duration mean?
DURATION: Duration is
how long the cam holds the valves open
. It’s expressed in degrees of crankshaft rotation (remember, the cam rotates at half the speed of the crank). A 280-degree-duration cam holds the valves open longer than a 260-degree-duration cam.
How hard is it to put a cam in a 350?
Changing the camshaft on a small block Chevrolet 350 engine is a project that requires methodical disassembly, inspection and reassembly of many parts on the engine. Since the camshaft and lifters are internal components, several external parts will need to be removed first in order to complete this task.
Does a cam increase horsepower?
Performance cams increase the duration and timing of the valve openings during the engine stroke,
increasing horsepower
and making your car accelerate more quickly. You’ll idle slightly rougher with a performance cam, but get a throaty rumble that’s desirable for some gearheads, depending on your vehicle.
How much horsepower does a cam add to a 302?
With 35 degrees of total ignition lead and 70 jets in the primary metering block, the little 302 produced a jaw-dropping 382 hp at 6,000 rpm and 368 lb-ft of torque at 4,200, a gain of
104 hp and 53 lb-ft
solely from the heads and headers.
