How much HP do double hump heads add?
“Double-hump” heads were found on many of its high-performance engines in the 1960s and early 1970s. They were manufactured with larger intake and exhaust port volumes and valves for the period, and engines equipped with them had output ratings of more than 350 horsepower.
What CC is double 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 |
What do double hump heads flow?
Chevy Double Hump Fuelie Heads Stock “double hump” heads flow 202 cfm intake and 141 cfm on the exhaust. If you must maintain a stock looking port, consider our “Undercover Porting”. With our “Undercover Ported” they will flow 220-230 cfm intake and 165 cfm exhaust.
Are camel hump heads good?
Any camel hump head is a candidate for a street engine build. But the key is what you have to spend to make them useable. A lot of them are cracked in the exhaust seat area. If you find a set of original stock heads, you’ll need a valve job, exhaust seats, valve guides – maybe screw in studs/guide plates.
How much horsepower does a double hump head add?
If you must maintain a stock looking port, consider our “ Undercover Porting ”. With our “ Undercover Ported ” they will flow 220-230 cfm intake and 165 cfm exhaust. This flow improvement will add 15 to 25 horsepower to your engine. We may be the only company around with CNC programs for the “double hump” heads.
What is a head with a double hump casting?
Heads with short double-hump casting marks were used in later high-performance SBCs. Most of these heads had accessory bolt holes and were identified with casting numbers ending in 186 or 492. They were used from ’68 through ’72 on 302 CI Z-28 engines as well as ’70 through ’72 in LT-1 350 CI Corvette/Z-28 engines.
How much does it cost to replace a double hump head?
Complete “Double Hump” heads with “ Undercover Porting “. Assembled with 11/32” stainless steel valves, flat tappet springs, spring locators, steel retainers, machined locks, rocker studs and guide plates. Flat surfaced to your specifications. $2,695.00
What are the features of a camel hump cylinder head?
Our all-new cylinder head casting is a modern take with all the old-school looks you desire out of a reproduction camel hump head. Features like fast-burn combustion chambers, high-velocity ports, large diameter valve springs, and positive stop valve seals bring the vaunted camel hump heads into the 21st Century.