What do lq9 come in

That is the route I would go. And if you want to save a few more hp, an electric water pump is good for a few more ponies. Pingback: LQ4 6. Has anyone ever installed head on the LQ4. I have a set I can install.

But my plan is cam swap with truck cam , comp springs ,lifters tray, chain ,pump. And I fear above a 93 octane. Even though I have HP tuner. Any advice greatly appreciated. I suggest starting there. Will sense i will be diving into motor what can I do for a little more power and still pass smog. Thanks for your question.

I have a Sierra LQ4 with k miles and a knock. A rotating LS assembly kit from Summit Racing would be my recommendation. Build a stroked version of what you have now and it will be bullet proof using forged internals.

A good cam that stays below 0. Pingback: Extra Stuffing! These stroked solutions recommended do not seem to be conducive to proper ring pack distancing from the crown of the piston. Please point me in the right direction if I am wrong. Have a Yukon xl Denali with the LQ4 6.

Like what factory gm heads, intake, etc will swap directly over with very little no modifications? Your email address will not be published. Your Website. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Summit Racing Equipment. III, 6. These engines are some of the most popular GM LS engines for several reasons: With iron block strength, they are the first choice for boost or nitrous applications.

GM made a bazillion of them which helps keep prices down. The heads flow similarly to LS6 heads, but have bigger chambers making them boost friendly. Displacement— cubic inches to be exact. Below are more upgrades that will improve the performance of the LQ4 and LQ9 engines.

Intake Duration 0. Still can drive daily. Engine Size Bore Dia. Piston Comp. Author: Brian Nutter After a stint in the U. The early part of his automotive career included working for engine builders Scott Shafiroff and C.

Batten, followed by several years developing performance pistons at Wiseco Piston Co. Jason Brenton says: December 13, at am. Joe Sanford says: March 16, at pm. Jason Powell says: December 3, at pm. Rob says: September 10, at pm. Danial Miller says: December 21, at pm.

BigDaddyRabbit says: February 7, at pm. Eric S Vaughn says: December 24, at am. Brian Nutter says: February 18, at am. Jeff Mann says: March 3, at pm. Plato says: March 29, at pm. Simon Barrow says: May 31, at pm. Their customer service was very knowledgeable and a big help.

Devon Thomas says: May 13, at pm. Tom says: June 1, at pm. Steve bradford says: July 8, at pm. Can a SS Lq9 6. Ken Strait says: July 23, at pm. Chad says: August 8, at pm. Danial Miller says: August 22, at pm. Tim Pedigo says: August 23, at pm. I'll give you guys permission to trust Ben on this one. Sorry to burst your bubble Ben, but I think the gas fumes are getting to you.

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What's the diff between LQ4 and LQ9 heads? Share More sharing options Followers 0. Reply to this topic Start new topic. Prev 1 2 Next Page 1 of 2. Recommended Posts. TurbochargedBerserker Posted August 26, Posted August 26, The early LQ4 engines and were the only LS based engines to come with an iron cylinder head cylinder head casting numbers and Starting in , the LQ4 switched to an aluminum cylinder head like the rest of the LS family and switched to a shorter crankshaft as well.

The newer heads were or casting numbers, which featured larger valves like the and heads, but also larger combustion chambers, which means the static compression ratio will be lower unless the heads are milled to increase the compression ratio. In , Chevy released a high output version of the 6. This engine can be identified by a letter N in the 8th digit of the VIN.

The LQ9 was still an iron block, aluminum headed engine and was rated at HP. Like the rest of the Gen 3 truck engines, the early models of the LQ4 and LQ9 were drive by cable and had return style fuel systems.

That changed to drive by wire with returnless fuel systems in , with the exception of the van lineup. The LQ4 and LQ9 engines were produced until In , Chevy transitioned the 6. The LY6 had an iron block but used a rectangular port aluminum head with a casting number of The head also had valves that were larger than both the heads used on earlier 6. The LY6 was used in trucks until the model year.

GM also released an aluminum blocked counterpart known as the L The L76 6. The L76 also made use of the casting rectangular port heads. The L76 truck engine was used from to , and it was also installed in some cars. In , Chevy introduced the L96 version of the 6. This was an iron block engine that was used up until It continued to use the rectangular port aluminum head. Chevy also used an aluminum blocked, cathedral port version of the 6. From to , they changed this engine to an LZ1 RPO code but it was still mainly only used in hybrid vehicles.

There were a few other LS-based truck engines such as the 6. I would also stay away from the and LQ4 6. If you plan on pushing the power levels beyond that, you should either look for a Gen 4 engine, or think about at least using Gen 4 rods in your Gen 3 engine, or installing some stronger aftermarket rods or a whole rotating assembly. For Gen 4 engines, the LY2 and L20 4. If you want a 5. For a 6. Any suggestions would be appreciated. Thx Randy. Save my name, email, and website in this browser for the next time I comment.

The most significant improvement is the strength of the bottom end. Due to the Y-block design and the six-bolt main caps with a cross-bolted design 4 bolts go through the cap vertically, and two bolts go horizontally through the block wall into the bearing cap , the LS blocks keep the crankshaft rigid and stable even at high power levels.

The iron-block truck engines are even stronger than the aluminum engines, but you have to live with a block that is about pounds heavier than its aluminum counterpart. Chevy also moved the cam further away from the crankshaft to allow a crankshaft with a 4.