What CC chamber are Vortec heads?
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What CC chamber are Vortec heads?
In essence, the Vortec head uses the iron LT1 chamber intake and exhaust ports in a standard-water-flow iron head. These production Vortec heads were used in the new Vortec 350ci engine intended for -, -, and 1-ton Chevy pickups.
What year 350 has Vortec heads?
The Debut. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads.
How much HP do 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.
What is the max lift on Vortec heads?
around 0.420 inch
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.
What CC are 906 Mopar heads?
Though factory chamber volume is 79 cc’s, the CNC ported 906 chamber volume is increased to 86 cc’s. Hardened valve seats are available at the customer’s request, and the heads can be further milled to reduce chamber volume if needed.
What are the best flowing SBC heads?
Peak Torque and Horsepower
| Cylinder Head | Peak Horsepower | Peak Torque |
|---|---|---|
| Dart | 419 at 6,200 rpm | 417 at 4,200 rpm (2) |
| Jeg’s | 408 at 5,900 rpm | 421 at 4,300 rpm (1) |
| Summit | 405 at 5,900 rpm | 416 at 4,400 rpm (4) |
| Edelbrock | 395 at 5,900 rpm | 409 at 4,200 rpm (5) |
What CC are camel hump heads?
Circle Track Takes A Closer Look At Chevrolet’s Famous ‘Double Hump’ Cylinder Heads
| 462 | ||
|---|---|---|
| Seat Angle | 45 | 45 |
| Port Volume (cc’s) | 171 | 75 |
| Avg. Port Width | 1.074 | 1.303 |
| Avg. Port Height | 1.927 | 1.405 |
How much horsepower does Vortec heads add to a 350?
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.
Are Mopar 906 heads any good?
While 906 heads do perform well when ported, the labor involved with hand-porting these heads, combined with the cost of new valves, springs, etc, has made it more economical in most cases to simply buy a new set of aluminum aftermarket cylinder heads.
What are Mopar 915 heads?
For a Mopar big-block, the ’67-only 915 head is the most desirable of all junkyard and swap-meet finds because of its good port design, larger valves, and closed combustion chambers. Earlier heads had the quench-friendly closed chambers, but small valves and ports, and later heads went to an open-chamber design.
Are 462 heads good?
They’re not a bad head, probably comparable to the L98 heads used on ZZ3’s & 4’s, but not as good as what’s available now. 462’s were one of the best flowing production heads. They were used between 1962-1968 on various HP versions of the 302, 327 and 350.
