Question: How Can You Tell If A 350 Head Is A Vortec?

What is so special about a Vortec engine?

The redesigned cylinder heads of a Vortec engine provides for improved combustion efficiency.

The intake ports (reshaped) of the engine provides for better cylinder filling and fuel atomization by promoting higher air flow velocities to the combustion chambers via the ports..

How do I know if I have Vortec heads?

The easiest way to identify a Vortec head is by the sawtooth pattern cast into the front. Look for casting number 12558062, but avoid casting number 10239906, which has a modified exhaust seat and loses 20 percent of its flow at 0.120-inch lift.

What year is the best Chevy 350 engine?

L31 (2002) From a purely technical standpoint, the most recent version of the Chevy 350 would naturally be the best of the bunch. Marketed as the “Vortec 5700” engine, but known internally by the moniker of L31, this engine was used primarily in GM vans and trucks until 2002.

How many miles will a 350 Chevy last?

229k miles is not unheard of for a properly maintained 350. You could do a compression test and leak down test to analyze the health of the motor.

How much horsepower do heads add?

Depending on your cam, you can gain anywhere from 40-70hp. Cam and heads can gain you 100+hp.

Can you put 400 heads on a 350?

The only difference is that 400 heads have steam holes drilled in them for the 400 block. You can put 400 heads on a 350 but you should not put 350 heads on a 400 without drilling the steam holes.

Can you put Vortec heads on a 350?

night rider Veteran Member. Yes the 1996-02 L31 350 vortec heads will bolt to ANY gen 1 350 engine.

Are Vortec heads any good?

Vortecs are said to be the best flowing out of box iron heads that Chevy ever produced. I have a set on my T-Bucket and they work well. You will need to also get a Vortec bolt pattern Intake manifold also.

What’s the difference between a 350 and a 350 Vortec?

Vortec Means Power Vortec heads instantly added 55 or more horsepower to a regular 350 head with the same displacement. Automotive enthusiasts are quick to note that the 350 and the 5.7 Vortec are essentially the same engine with the same displacement.

What is the difference between Vortec heads and regular 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. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062).

What vehicles have Vortec heads?

Re: Which vehicles came with Vortec heads? ( 96 thru 99 Chevy and GMC pickups, Suburbans, Tahoe, and Blazers. There were two types of Vortec heads, small heads were used on the small V-8 truck engine, the larger L31 heads were used on all 5.7 V-8s. The ones you want are L31, 5.7 heads.

Why are Vortec heads so good?

The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older 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.

Will 327 heads fit on a 350?

They are perfect for a 350. Both the 327 and the 350 have a 4″ bore so they like the same heads. Old heads like that will have softer valve seats, so if you want them to last a long time, you should either replace the seats or run leaded gas in the engine.

What are the best stock small block Chevy heads?

Peak Torque and HorsepowerCylinder HeadPeak HorsepowerPeak TorqueEdelbrock395 at 5,900 rpm409 at 4,200 rpm (5)Speedway381 at 5,400 rpm409 at 4,200 rpm (5)Vortec378 at 5,300 rpm408 at 4,300 rpm (7)Stock Iron358 at 5,800 rpm379 at 4,300 rpm (8)4 more rows•Jul 12, 2012

Are Vortec heads straight plug?

I thought all vortecs are straight plug. Straight. Most all headers will fit fine but you’ll get better luck with plug clearance by buying the short plugs instead of specific headers.

How much HP does Vortec heads add?

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.

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 do headers add to a 350?

The length of the primary tubing determines the effective rpm range, but headers can be worth 15-20 hp on the right application. Run on our restrictive two-barrel 350, the headers improved the power output to 248 hp and 365 lb-ft of torque, with consistent gains through the rev range.