L99 cam with stock lifters - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

StingrayblueSS · 03-20-2018, 11:22 AM

https://youtu.be/vyhklcPglWs
From what I've read this is a bad idea.
Just wanted to see what others think.

Russell James · 03-20-2018, 04:37 PM

Yeah, I sure wouldn't put a cam in with the stock AFM lifters. Not only is there that lifter issue.... but one advantage of a cam is now you can rev higher. L99's have heavy stock intake valves. Not a great idea to be revving heavy intake valves higher than the stock limit.

I think it would be much better to just do a VVT cam (non AFM), get new lifters, LS3 intake valves, and springs to match the cam.

StingrayblueSS · 03-20-2018, 05:19 PM

Quote:

Originally Posted by Russell James

Yeah, I sure wouldn't put a cam in with the stock AFM lifters. Not only is there that lifter issue.... but one advantage of a cam is now you can rev higher. L99's have heavy stock intake valves. Not a great idea to be revving heavy intake valves higher than the stock limit.

I think it would be much better to just do a VVT cam (non AFM), get new lifters, LS3 intake valves, and springs to match the cam.

The GPI vvt cam package doesn't include valves, so that would be another expense I wasn't thinking of.

JLGO · 03-20-2018, 07:44 PM

They are a little heavier and much stronger tgan the ls3 valve.

jergarr · 03-20-2018, 07:58 PM

Quote:

Originally Posted by StingrayblueSS

The GPI vvt cam package doesn't include valves, so that would be another expense I wasn't thinking of.

Its my understanding you do not have to replace the intake valves. Im having the gpi vvt 3 kit installed next week and the only part outside of the kit provided that im having put on is a fluidampr balancer. Maybe GPI or someone more experienced than me can confirm this. I guess it could also depend on your mileage im at 33k.

Missile Man · 03-22-2018, 06:27 AM

I have a L99 and I wouldn't replace the cam without replacing the valve train parts. I'm in the process of getting the top half rebuilt to get rid of the crap L99 lifters.

03-20-2018, 11:22 AM	#1
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	L99 cam with stock lifters https://youtu.be/vyhklcPglWs From what I've read this is a bad idea. Just wanted to see what others think.

03-22-2018, 06:27 AM	#6
Missile Man Drives: 2010 2SS/Black Join Date: Mar 2009 Location: Tucson, AZ Posts: 608	I have a L99 and I wouldn't replace the cam without replacing the valve train parts. I'm in the process of getting the top half rebuilt to get rid of the crap L99 lifters. __________________ 2010 Black 2SS L99 Mods: * CAI Intake * Magnuson MP2300 TVS Supercharger/RDS Spacer * Vector Motorsports Tune * Stainless Power LT/Hi Flow Cats/Tru X-* Pipe/36" J-Pipes/40 Series * R1 Concepts ceramic pads and slotted/drilled rotors

03-20-2018, 04:37 PM	#2
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Yeah, I sure wouldn't put a cam in with the stock AFM lifters. Not only is there that lifter issue.... but one advantage of a cam is now you can rev higher. L99's have heavy stock intake valves. Not a great idea to be revving heavy intake valves higher than the stock limit. I think it would be much better to just do a VVT cam (non AFM), get new lifters, LS3 intake valves, and springs to match the cam.

03-20-2018, 07:44 PM	#4
JLGO Drives: 2015 Camaro SS convertible L99 Join Date: Nov 2016 Location: Orlando, FL Posts: 245	They are a little heavier and much stronger tgan the ls3 valve.