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also like skunk said they have less ptv vs a cath port..about .050 less valve drop on the intake thats why youll see a ly6 (ieon block l92)cam combo around 7.5-8ivo vs a cath youll see cams in the 11.0ivo range..ls3 being all alum can go .5 more do to the extra growth of the block..this isnt a exact number for ivo because different lobes an spring pressure also come into play.but it gives you ...Nov 24, 2021 · Chevy 706 Heads come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. The heads are washed, disassembled, pressure tested, and all valve stems have been replaced as per requirements. Scroll down to learn more about 706 heads. Chevy 706 Heads- …Great 799/243 heads all the surfaces were true and the valve job was perfect. Read more. One person found this helpful. Helpful. Report. Ron R. 5.0 out of 5 stars Perfect fit. Reviewed in the United States on February 2, 2023. Verified Purchase. Exactly what I was looking for. Read more. One person found this helpful. Helpful.243 heads are 243 heads (different hardware for different short blocks though, i.e. LS6, LS2). 806, 853 and 241 all share the same ports. They are cast in different manners so the surface finishes are different which may slightly influence turbulence at certain lifts. The 853 and 241 heads have the same chamber size.LT engines were producing an output of 275 horsepower, and its successor, LS1 243 heads came with a whopping power of 345 horsepower. ... LS1 engines come with reduced proportions, and this makes it much easier to swap into vehicles even with a small engine base. They get this compact size due to the old-school pushrod design that is …It means there’s a drop in compression of about 0.70 when proceeding with the head swap. 706 Vs. 799 Heads. When testing these two types: 799 vs. 706 heads on the 5.3L engine, I discovered that the 799 made the most flow, but it couldn’t translate into power. In this case, the 706 did a better job. 706 Vs. 862 HeadsThe 243 heads are factory cylinder heads that were used on the LS6 engine found in the 2001-2004 Chevrolet Corvette Z06. They are made of aluminum and have a small combustion chamber, which can result in high compression ratios.The LS 243 Cathedral Port cylinder heads are renowned for their exceptional performance capabilities over the other cathedral port offerings. These heads are designed to maximize airflow and combustion efficiency, taking advantage of the LS6 engine's power potential. With their cathedral port design, larger valves, and improved airflow ...45 posts · Joined 2006. #4 · Apr 12, 2010. I'll recommend TFS 215 heads and a 224/228 comp cam. A friend of mine has this package and I was really impressed. With a ported fast he made 450 rwhp and the car idled and drove great. It was actually a little tame for my taste, but sounds like what you're looking for.The two types of heads, 241s and 243s are found in many vehicles. The combustion chambers for each of these types differ slightly: 243 heads have an internal volume of 65cc while 241s have a 67cc size. Due to this difference in size, the compression ratio for 243 heads is higher than that of 241s, meaning that more power can be generated from ...243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications*** 862 99 and up 4.8-5.3 Truck heads 706 99 and up 4.8-5.3 Truck heads 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6.0 Iron center bolt headsIdentical heads would be the 799s. They don't have the cult following of the 243s, so they're often found cheaper but they're the same head, just cast at a different plant. The only difference in the "regular" 243 from the LS6 243 is that the LS6 version had lightweight valves and special springs.St. Jude Donor '03. 853 and 241 are basically identical. 853 was used on 99-00 LS1 engines. 241 was used on 01-04 LS1 engines. They both have a 66.67 cc combustion chamber (10.1 CR), 200cc intake runners, and 70cc (round) exhaust ports. The 243 head is the 01+ LS6/LS2 head.I would think a 243 head is a 243 head, I think I read that the 243 was used on the LS6 Z and all LS2 motors had the 243 heads. Mr.Bill Reply Like. 09-27-2011, 08:43 PM #3 Eddie 70. Race Director . Member Since: Feb 1999. Location: Lenoir City Tennessee. Posts: 19,658 Likes: 59 Received 29 ...Equipped with the 317 heads, the turbo 6.2L produced 807 hp at 6,800 rpm and 747 lb-ft of torque at 4,900 rpm. The boost pressure peaked at 7.6 psi, before dropping to 6.9 psi at 7,000 rpm. The ...You can find 243 heads on a Vette or on a Chevy Tahoe, or even a Silverado. Same for 799 heads. It depends on the year your Chevy was manufactured – be it a sports car, a truck, or an SUV. Back in the …1582 posts · Joined 2005. #1 · Oct 15, 2005. What year explorers did the GT40 come on, I think they started in 96 right?? and the GT40 P's were 98 right?? Im going to the local yard to do some hunting for some heads, is there a big difference in the GT40p's vs. the regular ones?? Im just trying to put together a real cheap setup, for a daily ...Beautiful set of 243’s are on the shelf and ready to ship. The heads are assembled and complete, no core exchange necessary. Orders placed before 3PM ship same day. FED .700 Lift Dual Spring Kit; FED Custom stainless Intake and Exhaust Valves, 2.040 / 1.575; Titanium RetainersThe LS2 is a 6.0L, Gen. 4, aluminum small block engine that came in both cars and trucks. The engine specs and information we're sharing here are for the LS 2 that was used in GM trucks and SUVs between 2005 and 2009. The information listed here is for a stock LS2 truck engine. Mechanically similar, General Motors' LS and LS-based Vortec ...The LS4 is a 4th gen, 5.3 l aluminum small block engine that was used in GM cars between 2005 and 2009. They had cathedral port cylinder heads and used Active Fuel Management (AFM). The LS4 cylinder heads came with two casting series numbers - 799 and 243. The combustion chamber volume is 65cc.823 vs 243 heads The popular L6 243 heads have a smaller capacity (64cc), whereas the 823’s larger intake valve has a 70cc cylinder, promoting better overall flow within the combustion chamber. In addition, there’s some controversy among gearheads about whether the “swirl” ramp added to the 243 to improve fuel and air mix in the ...C5 Tech - LS6 valves vs stainless aftermarket in 243 heads - Curious if you guys running 243 heads keep the stock valves or replace them with aftermarket that might help flow. Looking to pick up a set of 243 heads needing hardware and work them over myself. I imagine the LS6 valves are not undercut like the stainless...Oct 13, 2006 · chevymastermind said: I have a set of Chevy heads with a casting number of 333882, with 1.94 Heads, i am hoping to make 350-375HP with them. the engine is a 350 Steel crank, 4 bolt main, 9.5:1 compression ratio with these heads, comp cams .480/.480 lift with 230/230 Duration at 0.50, 600cfm edelbrock carb, Performer RPM intake, headers …

Let's celebrate a hunting round that is aging well. Prior to the 243 Winchester's arrival, America's most versatile, light-recoil, "dual-purpose" cartridges for hunting varmints and deer were the 250-3000 Savage and 257 Roberts. Both pushed .257 caliber bullets of 87- to 120-grains in the neighborhood of 2,600 to 3,200 fps.In any event, although the dyno did not show a huge gain, the SOP feel with the heads is serious. The Goat pulls much, much harder, especially above 2600 rpms or so. Ron at Vengeance told me that the as cast typically dyno about 10-12 HP less than the CNCs. 2018 Camaro ZL1 1LE: 649 HP 689 Trq.Add a fast intake and another 10-15. N/a as you prolly know doesn't yield a lot of hp per $. I agree. I had a small Crane cam in mine and then added Dart 205 heads that were as cast. They were roughly equivalent to the 243's and I picked up 20 hp with just the head swap.Phoenix Discussion starter. 6208 posts · Joined 2004. #1 · Sep 14, 2007. My dad just got a brand new Silverado with a 4.8l as a rental. I popped the hood to see what engine it had, and I noticed that the head were 243 castings. Are these the same that are used on the LS2?

What did 243 heads come on? To begin, the LS6 engine was first introduced in 2001 and used until 2006. It came equipped with 243 cylinder heads which were initially designed for C5 Corvettes. However, the popularity of the LS6 spread to other applications such as trucks with the LQ4 and LQ9 engines.Off the shelf VN heads outperform B-Cast heads in flow rates. VN heads on an early motor will yield higher horsepower with a narrower torque band vs less HP with early heads and a wider torque band.. Can you stroke a 253? To get the right deck height with a 253 mini stroker you need to use the 305 piston which neccesitates the 0.110″ to 0.140″ overbore.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The LC9 engine is a 5.3L, Gen. 4, aluminum small block e. Possible cause: I am debating on either upgrading my 2004 Goat with either 243 heads or upping my ca.