How much does it cost to port and polish LS1 heads?

Registered. $200-300. You may be able to get it cheaper if you work a deal.

Which heads are best for LS1?

LS1, 215 cc. The 215-cc Mongoose was designed specifically to maximize the 4-inch bore, and is an excellent choice for street-based applications. However, the 215-cc head can also be a good choice for aggressive or forced-induction 346-ci combinations.

What did LS 243 heads come on?

The 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.

Are 243 heads good for LS1?

I got about 50 hp on my LS1 Corvette with unported 243 heads and a modest cam swap with a tune. The 243 heads flowed plenty well.

Is there a CNC port for an LS3 cylinder head?

Our Budget CNC porting for LS3’s alleviates the primary restrictions in the head. Typical gains are 15-30rwhp, along with the benefit of a complete professional rebuild. Our Full CNC porting for GM 821 LS3’s is available in several port sizes.

What is the output of a 346cid LS head?

Typical 346cid output with daily drivable HR’s is 440-480rwhp SAE. Our Performance Rebuild option includes our high end CNC’d valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly. Our most powerful GM casting based LS head.

How much compression does a GM 241 cylinder head generate?

The only GM 241 porting option on the market capable of generating high compression while retaining the P2V necessary to run large cams. Generates 11:1 on 346’s at stock P2V; up to 12:1 CR on stock 346cid LS1’s.

How many horsepower does a short block LS7 have?

Typical stock short block LS7’s manage 590-640rwhp SAE with daily drivable hydraulic cam grinds. Proven capable of supporting 700-800hp NA with readily available manifolds, including the OEM GM LS7 manifold.