Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
TireRack
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons


Reply
 
Thread Tools
Old 04-28-2018, 01:12 PM   #43
Royal Tiger
Sd Kfz 182
 
Royal Tiger's Avatar
 
Drives: 2013 2SS/RS L99 GFX Convertible
Join Date: Apr 2016
Location: Lehigh Valley, PA
Posts: 3,044
Wait until the new Silverado motors go to crap with 1-7 cylinder deactivation.

So back to my question, is for example a BTR Stage 2 cam, needing new springs every 25k miles as opposed to a Stage 3?
Royal Tiger is offline   Reply With Quote
Old 04-30-2018, 02:10 PM   #44
Moto-Mojo
Fast Cars and Old Guitars
 
Moto-Mojo's Avatar
 
Drives: 2015 2SS RS (L99, baby!)
Join Date: Apr 2012
Location: N. CA
Posts: 2,228
I’m not disputing this because it seems the OP has done the homework but makes this statement; “From my research, you cant just shut off AFM and ride with the stock cam and stock AFM lifters. Its best, in a reliability standpoint, to take it all off the engine.”

Since many of us either have a Range Device or tune AFM out, are you suggesting this has some sort of damaging effect on the valvetrain? Or are you just saying that over time, with AFM ALWAYS off, there is a reliability issue? What about someone who ALWAYS uses the paddles? Did GM not account for a paddle shifting owner? Hell, I always figured the back and forth of on and off did more harm than one or the other.
__________________
"I don't want to belong to any club that would accept me as a member" - G. Marx
Moto-Mojo is offline   Reply With Quote
Old 05-26-2018, 05:53 PM   #45
Tran2la
 
Drives: 2013 Camaro with a Nova body
Join Date: Apr 2018
Location: San Diego
Posts: 45
I will share this info. This is what I received from Gwatney Performance Innovations.
Its the lobes specifications of the L99 STOCK Camshaft. I requested this info since they were going to use the Non AFM lobes for the new camshaft I was having custom made.

Its funny how GM advertised LSA as being 115 degrees and GPI states that the LSA is different not only from what GM stated but also between the AFM and NON AFM lobes.
Still waiting for the custom grind Stock cam.

AFM lobes



NON AFM Lobes



I will see what the end result would be once I get the cam card that is supposed to come with the new cam.
Tran2la is offline   Reply With Quote
Old 05-26-2018, 06:15 PM   #46
qcman

 
Drives: 2013 Camaro 2SS RDP Tuned L99
Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,751
Quote:
Originally Posted by Moto-Mojo View Post
I’m not disputing this because it seems the OP has done the homework but makes this statement; “From my research, you cant just shut off AFM and ride with the stock cam and stock AFM lifters. Its best, in a reliability standpoint, to take it all off the engine.”

Since many of us either have a Range Device or tune AFM out, are you suggesting this has some sort of damaging effect on the valvetrain? Or are you just saying that over time, with AFM ALWAYS off, there is a reliability issue? What about someone who ALWAYS uses the paddles? Did GM not account for a paddle shifting owner? Hell, I always figured the back and forth of on and off did more harm than one or the other.

I've read here its better they are tuned out than not. The lifters don't collapse in that situation & the engaging and disengaging puts some wear on the Cam lobes I believe. Jertm who is a GM mechanic commented to that effect I can't recall exactly what he said. in other words nothing bad about disabling AFM in a tune or with a Range.
__________________
qcman is offline   Reply With Quote
Old 05-27-2018, 01:47 AM   #47
KTMracing09
 
KTMracing09's Avatar
 
Drives: 2SS/RS L99 ABM
Join Date: Aug 2009
Location: Mechanicsville, Maryland
Posts: 220
Aside from more wear engaging and disengaging. I felt I got better gas mileage with afm tuned out than I did with it constantly kicking on and off.
__________________
Rotofab CAI, 2" LT Headers/non catted, 3" Straight Pipe w/ X-Pipe, Elite Catch Can, GPI SS3 VVT, 9" 3800 Triple Disc, Yella Terra Ultralite Rocker Arms, MSD Super Conductor wires
KTMracing09 is offline   Reply With Quote
Old 05-27-2018, 10:23 AM   #48
qcman

 
Drives: 2013 Camaro 2SS RDP Tuned L99
Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,751
Quote:
Originally Posted by KTMracing09 View Post
Aside from more wear engaging and disengaging. I felt I got better gas mileage with afm tuned out than I did with it constantly kicking on and off.

For sure especially in the city where I drive 90% of the time with this car. The in and out was brutal on gas around town it was constantly switching. AFM was a bit better on the highway than after tuning out but its pretty minimal and I don't drive in that situation enough to matter anyways. Its a curse of a "feature".
__________________
qcman is offline   Reply With Quote
Old 05-27-2018, 12:21 PM   #49
Moto-Mojo
Fast Cars and Old Guitars
 
Moto-Mojo's Avatar
 
Drives: 2015 2SS RS (L99, baby!)
Join Date: Apr 2012
Location: N. CA
Posts: 2,228
What a gawd-awful invention to feign better gas mileage to some gov't committee. We chase the silliest crap in this country all in the name of some useless, feel-good notion promoted by lobbyists with grant money. But don't get me started!
__________________
"I don't want to belong to any club that would accept me as a member" - G. Marx
Moto-Mojo is offline   Reply With Quote
Old 06-16-2018, 12:29 AM   #50
Tran2la
 
Drives: 2013 Camaro with a Nova body
Join Date: Apr 2018
Location: San Diego
Posts: 45
Camshaft is in. Heres the results. A bit more than stock.

Duration 200/209 Lift .528/.528 115+7 LSA


Last edited by Tran2la; 06-21-2018 at 02:33 PM.
Tran2la is offline   Reply With Quote
Old 06-21-2018, 02:06 PM   #51
WoodBoss
"Old School"
 
WoodBoss's Avatar
 
Drives: 2010 2SS L99
Join Date: Apr 2015
Location: Sherrills Ford, NC
Posts: 1,295
How do you like it? So for this do you just change the lifters and leave the valve springs stock?
__________________
Back In The Saddle - Earley 2010 2SS IBM A6 #10244 Built - Roto-Fab CAI, Muffler/CAT Delete, 17" Mickey Thompson ET DRs, RDP Tune, ZL1 Fuel Pump, BW Stage II Ported TB, Speed Engineering 1-7/8" Longtubes, ZEX Nitrous 150HP Shot, Lingenfelter 160* Stat, NGK TR6IX Spark Plugs & Elite Catch Can, TCI Line Lock, JRE Trans Dipstick, BMR Trailing Arms & Toe Rods, 11.6 sec @ 120 mph - 1.59 sec 60' - 1/4 mile pass Check Out My Youtube Channel For 5th Gen Camaro Drag Racing & How To Mods https://www.youtube.com/channel/UCyG...GR9gDm6PO-27rg
WoodBoss is offline   Reply With Quote
Old 06-21-2018, 02:32 PM   #52
Tran2la
 
Drives: 2013 Camaro with a Nova body
Join Date: Apr 2018
Location: San Diego
Posts: 45
It will be a while before I will be able to "feel" it. But as for other questions...
Yes just changing lifters to LS7 and springs stay the same. Also cam phasing is not altered. Full phasing of the cam can happen.
Tran2la is offline   Reply With Quote
Old 09-07-2018, 07:29 PM   #53
pir4te
Moonshiner
 
pir4te's Avatar
 
Drives: Holden SS-V L77 flex fuel
Join Date: May 2012
Location: Sydney, Australia
Posts: 166
Another way to retain full movement authority / longer duration / greater overlap is to swap the 52° full advance on park phaser for the 46° full retard on park, and grind using the pre-2009 VVT core.
Softer cranking, more dynamic compression, a win overall given you are going to be retuning anyways.
I previously had 26.2° authority using a 224/230 115+4 .555 AFM cam (.500 on 1.7)
Thing is to reduce pumping losses or tip the combustion phasing to more expansion than compression (Atkinson) you don’t need anywhere near that authority.
The way I use 46° authority is managing dynamic compression, scaling from 8 for startup, high RPM and low octane; to 10.8 at idle, high load and ethanol. My static CR is 14:1.
__________________
Compression is King.
Naturally as-pirated, all-motor, all alcohol.
pir4te is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 06:26 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.