Webnow i installed slp 1.85 rockers, the 243 heads unported just slightly milled with dual springs & valve job, and updated tuning done by frost using email tunes with HPTuners. still stock cam. the new numbers are: 362hp and 364ft-lbs SAE so overall with those two mods and the updated tuning I picked up 30hp and 28ft-lbs of torque. Share this post on Web12 okt. 2024 · Swapping an upgraded set of heads onto your LS1 is a great way to pick up solid horsepower. “Swapping the heads starts with being prepared by making sure you have all the parts and tools needed. It’s also a great time to swap a cam, add headers, upgrade the intake manifold, and go through the valvetrain if needed.
Port and Polish for the 243 LS heads! 500 hp lsx build!
Web21 jan. 2011 · Re: Milling heads for more compression (I have 243) « Reply #13 on: January 20, 2011, 10:31:05 PM ». If you're using the stock cam, deck the heads and run some .040 cometics. That should put your quench in the mid .040's and add a cunt hair of comp. Much better than milling .010+ and running stock gaskets. Web8 aug. 2024 · The 243 heads are definitely the right choice if your looking for more usable power. Having the heads milled to bring you to 11:1+ Compression will give you a nice bump in power as well. 500 rwhp is around 570-590 Hp at the crank. painting the roses red alice
241 to 243 head swap LS1GTO Forums
WebThe 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6's 243 heads, but had 6 cc larger combustion chambers. Basic Differences There are three basic differences between the LS1 and LS6 heads. WebSee my Signature for full the mods. I have comp cam 222/224 566/568 112lsa. Yes 05 has 6.0L motor vs 5.7L. If you are just make a swap from stock 241's to stock 243's then 15-20rwhp would be a "safe" expectation..... maybe use a cometic gasket set to get the CR up a bit and the quench better for some extra power. Web8 aug. 2024 · Received 1,792 Likes on 1,125 Posts. 243 heads and cam basically makes it a factory LS6. So 405 at the crank. You can go quite far NA. Depends on what you're wanting to spend. Easiest to just put the LS6 hardware in a boost it to 500. If you truly want 500 rear wheel NA, it's both difficult and expensive on a 5.7L. painting the roses red midi