Bring the piston up to TDC - put the cutter in the head - put the head on the block with a used head gasket - let the cutter drop - set the stop - machie the valve relief - take the head off and measure the depth with a dial-caliper and some sort of straight edge across the relief so you have a before and after number. Add 1/8th inch to that and get the proper cutters int & exh. We also offer (2) In-House tuning options.Yes - First Always use a drill motor! Next determine what size valves you have in your engine. A new option will appear below that will allow you to purchase the recommended HP Tuners MPVI3 Hardware. If you want a remote tune and don't own HP Tuners or EFI Live hardware, select the Remote Tune Calibration Package (Requires HP Tuners / EFI Live). Just leave it on the default selection of "No HP Tuners MPVI3 Hardware".Ģ. A new option will appear below that allows you to purchase HP Tuner MPVI3 Hardware. If you already own HP Tuners or EFI Live hardware - you can choose the Remote Tune Calibration Package (Requires HP Tuners / EFI Live). (Click Here to Learn More about Remote Tuning)ġ. (We always encourage measuring PTV clearance when running aftermarket gaskets with an aggressive camshaft.)īuying a GPI Cam, and want it tuned by the team who designed the cam? Considered one of our tuning options. The L99 may require fly cutting intake valve reliefs to run a thinner gasket. 040" Head Gasket is an upgraded quality gasket that is a great choice for a variety of builds (including forced induction/nitrous) that are also wanting a small bump in compression. These are great for most forced induction/nitrous builds that want to maintain stock compression.ģ) The Cometic LS3/L99. These are good for most NA head & cam builds that want to maintain stock compression.Ģ) The LS9 Head Gasket is the factory OEM replacement gasket for the LS9 (.051" thickness) and has more layers than the LS3/L99 gasket. If you have specific questions - feel free to ask!ġ) The LS3/L99 Head Gasket is the factory OEM replacement gasket for your L99 engine (.051" thickness). We will try to answer these questions generally, but please note - these are general answers. If increasing compression have you chosen the correct length pushrod? If increasing compression do you have access to a high octane fuel to run safely? If increasing compression will you have proper piston to valve clearance? Do you intend to (or are you currently running a forced induction/nitrous setup)? Many considerations must be made to determine the correct head gasket for your build. GM repeatedly tested this Johnson lifter past 8,500 RPM, and is currently using them in the COPO Camaro's. If you are after power and reliability - this is your lifter. The Johnson 2110 lifter is built to the highest tolerances and is happy to spin beyond 8,000rpm. Our final option is for the individual who is wanting to spin their motor freely without worrying about lifter failure. (this is our recommended lifter for most customers)īest. We offer the GM Performance Racing Lifter which is built with tighter tolerances than the LS7 lifter, has lighter internal mass and has been tested by GM to be reliable up to 8,000rpm. The next option is to upgrade to a higher quality lifter. We also offer a Cam Motion branded equivalent to the OE LS7 lifters available.īetter. This is a good option up to around 7,000rpm. If you have some miles on your engine, there is also an option to purchase a full set of (16) LS7 lifters. These LS7 lifters are stamped out by the millions and are a very popular option. Our entry-level option would be to just replace the (8) AFM lifters with a set of (8) OEM LS7 lifters. We have several lifter options to choose from.
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