Are 706 heads good for boost?
After running the same setup with the 706 heads, the 5.3L produced 706 hp at 6,500 rpm and 641 lb-ft of torque at 5,000 rpm. The gains offered by the extra compression of the 706 heads remained (and even increased slightly) under boost.
Are 706 or 799 heads better?
The 799 heads offered the most flow, bettering the 706 heads by as much as 20 cfm at some lift points. The chamber volume on the 799 heads was within 2.5 cc’s of the 706 heads, but the dyno indicated this did not translate into power on our test engine. The peak numbers were certainly close (473 hp vs.
Which heads are better 706 or 317?
The 317 heads flowed more than the 706 heads by as much as 20 cfm at some lift points. The peak flow numbers differed by just 7 cfm at 0.700 lift. What made the 317 heads both kissed and cursed was the combustion chamber size. The massive chamber volume of 71.5 cc’s put them a full 10 cc’s over the 706 heads.
What heads are on LQ4?
The 1999-2000 LQ4 had cast iron cylinder heads. All others had aluminum heads.
Are LS 706 heads good?
Chevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. They are the most affordable and most effective remanufactured cylinder heads that can be used for a 4.8L, 5.3L, and even 6.0L LS engine build.
How much HP can a LQ4 handle?
1,000 hp
The LQ4 and LQ9 have very strong blocks. They can handle over 1,000 hp.
What LS engine has 706 heads?
The LS 706 Heads wound up on different models of the Chevy family and fit with the high-performing LM7, LR4, and LM4 5.3 engines. The engine specialists have remanufactured these high-geared cylinder heads at a much more affordable cost and make them the best-performing, cathedral-port factory heads out in the market.
Are 706 heads better than 317 heads?
What LS motor comes with 706 heads?
How much HP can a stock LQ4 handle?
Are Chevy 706 Vortec LS heads any good?
Are Chevy 706 Vortec LS heads any good? Hell yes they are! GM’s 706 Vortec heads are the cheapest and most effective heads you can use for your 5.3L, or 4.8L, or even some 6.0L LS engine build. Bold statement?
Although the 706 heads do have smaller valves compared to 317 heads, they are still solid performers that will keep your compression ratio in the sweet spot. 706 heads can be upgraded with larger valves for even more performance if you have the spare cash laying around.
How much power does an LQ4 engine make?
That was quite a jump from the 400 hp produced by your average LQ4 under the same conditions. After a few break-in cycles and tuning, our LQ4 on the floor produced peak numbers of 549 hp at 6,700 rpm and 481 lb-ft of torque at 4,900 rpm.
What is the difference between the LQ9 and LQ4?
Our build started out life as most 6.0Ls, with the base workhorse LQ4. Rated by the factory in the low 300-hp range (depending on application and year), the LQ4 featured reduced static compression (compared to the LQ9) thanks to a combination of dished pistons and sizable 71cc chambers on the 317 cylinder heads.