LFX "Bore and Hone"??? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

robmol1 · 05-28-2014, 09:23 AM

Has anyone attempted going oversize on their pistons? if so what other modifications did you have to do to get the engine running properly?

does it decrease my compression ratio?

or just keep it the same?

i understand that my CI changes but what will it actually affect

i also can seem to find oversized pistons for the LFX im assuming i would have to get custom one

thanks!

i might just be talking crazy

KaBoom1701 · 05-28-2014, 09:30 AM

Haven't heard of anyone doing this to an LFX yet.....

DSX_Camaro · 05-28-2014, 09:39 AM

Compression ratio is determined by the pistons themselves, so you buy 10:1 11:1 etc CR pistons. We had a thread about this going... Mr Jacfab has theoretical knowledge on this actually. However yes, I believe you would need custom pistons.

robmol1 · 05-28-2014, 12:09 PM

what if i just went same piston design just a bigger boresize of piston?

GretchenGotGrowl · 05-28-2014, 12:16 PM

We've been discussing boring/stroking the LFX in this thread. http://www.camaro5.com/forums/showthread.php?t=347964

There is some interesting information there.

Jason@JacFab · 05-28-2014, 01:15 PM

I don't know how thick the stock sleeves are on the LFX, if it's anything like the LS1 you can't bore them out very far at all without resleeving. Darton Sleev makes a set of sleeves that would work with the LFX, which would allow a max bore of 98mm which would take you up to a 3.9L...

Either way you go about doing something internally to gain displacement it's going to be expensive... The darton sleeves are ~$1800 not including installing them. If you want to do any kind of stroker affair via offset grinding, etc plan on custom rods, I was quoted ~1350 for 6 rods... Custom pistons either way. Going to a bigger piston would increase the compression ratio...

There is some good discussion in the link that GretchenGotGrowl posted above, but in the end, you'd have to REALLY be a dedicated 6 cylinder fan to drop that kind of money on doing anything major like this. I'd love to see someone do it, but I think I will just be going down the forced induction route myself.

Airmaster · 05-29-2014, 08:44 PM

Quote:

Originally Posted by Jason@JacFab

I don't know how thick the stock sleeves are on the LFX, if it's anything like the LS1 you can't bore them out very far at all without resleeving. Darton Sleev makes a set of sleeves that would work with the LFX, which would allow a max bore of 98mm which would take you up to a 3.8L...

Either way you go about doing something internally to gain displacement it's going to be expensive... The darton sleeves are ~$1800 not including installing them. If you want to do any kind of stroker affair via offset grinding, etc plan on custom rods, I was quoted ~1350 for 6 rods... Custom pistons either way. Going to a bigger piston would increase the compression ratio...

There is some good discussion in the link that GretchenGotGrowl posted above, but in the end, you'd have to REALLY be a dedicated 6 cylinder fan to drop that kind of money on doing anything major like this. I'd love to see someone do it, but I think I will just be going down the forced induction route myself.

I thought you were going to go Dr Evil on that engine you picked up? Are you instead going to throw forced induction on it?

Jason@JacFab · 05-29-2014, 10:15 PM

Quote:

Originally Posted by Airmaster

I thought you were going to go Dr Evil on that engine you picked up? Are you instead going to throw forced induction on it?

I'm currently collecting LF3 parts to do some sort of forced induction setup...

I'm still researching random routes I could take, but if you do the math hp per $$ a guy would most likely to be better of to just go forced induction.

Rough guess, a guy would be looking at appx $3500 +-500 to sleeve the block, bore it to 98mm and have custom pistons made assuming no labor cost for engine disassembly, or reassembly.

How much of a power gain could a guy really expect for spending all that $ just to gain .3 of displacement. You'd get a little compression ratio bump from the bigger bore (could get more or less if the dome on the pistons were changed of course), but I think the hp diff would be negligible just from that.

KMPrenger · 05-30-2014, 02:37 PM

A bit off topic, but still on the topic of n/a power.....a guy called LMR and they claimed 40rwhp with just a ported head job on an LFX

http://www.camaro5.com/forums/showthread.php?t=322763

But we haven't heard anything out of them in a long time so its likely the project died. Would still be an expensive project....except possible for someone like Jacfab here who could maybe do the whole thing themselves lol.

Jason@JacFab · 05-30-2014, 09:13 PM

Thanks for the vote of confidence... However, I lack necessary machinery to install sleeves, bore, offset grind cranks, regrind cams, etc etc... Figure in another 2-3k for these magical unicorn heads that will pick up 40hp, on top of the sleeves, custom pistons, rods, etc etc etc... I bet a guy could easily wrap up 10k on this kick ass v6... Not a place where I want to allocate that kind of coin at the moment.

05-28-2014, 09:23 AM	#1
robmol1 Drives: 2012 Camaro 3.6L 2LT Join Date: Apr 2013 Location: ONTARIO,CA Posts: 16	LFX "Bore and Hone"??? Has anyone attempted going oversize on their pistons? if so what other modifications did you have to do to get the engine running properly? does it decrease my compression ratio? or just keep it the same? i understand that my CI changes but what will it actually affect i also can seem to find oversized pistons for the LFX im assuming i would have to get custom one thanks! i might just be talking crazy

05-28-2014, 09:30 AM	#2
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,631	Haven't heard of anyone doing this to an LFX yet..... __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

05-28-2014, 09:39 AM	#3
DSX_Camaro Drives: 2013 SW 2LT/RS LFX/AY6 Join Date: Feb 2013 Location: Orlando, FL Posts: 1,741	Compression ratio is determined by the pistons themselves, so you buy 10:1 11:1 etc CR pistons. We had a thread about this going... Mr Jacfab has theoretical knowledge on this actually. However yes, I believe you would need custom pistons. __________________ K&N CAI, 1LE Strut Tower Brace, Elite Engineering Catch Can and Clean Side Separator, Apex Scoop w/ Washer Relocation Kit, CTS Front Calipers and Rotors, JacFab Ported Intake Manifold, JacFab Intake Manifold Spacer, 80mm Overkill Throttle Body, SS Brake Lines, Ideal Garage Master Cylinder, Monster Twin Disc Clutch, NPP Retrofit w/ Magnaflow Resonated X, ARH Catless Downpipes, JRE Built 3.45 Diff, 1LE Axles, 1LE Hubs, Overkill Tuned, BMR Anti Wheel-hop Kit Stage I, ACS TL1 Hood Insert, ZL1 Spoiler

05-28-2014, 12:16 PM	#5
GretchenGotGrowl Drives: 11 F150 EB/13 Sonic RS/15 Z06 Join Date: Sep 2010 Location: Little Rock, AR Posts: 7,127 View My Garage	We've been discussing boring/stroking the LFX in this thread. http://www.camaro5.com/forums/showthread.php?t=347964 There is some interesting information there. __________________ New Ride -- 2015 Z06 2LZ (stock) -- Journal Old Ride -- 2012 Camaro 2LT/RS (647 RWHP & 726 RWTQ) -- Build Thread

05-28-2014, 01:15 PM	#6
Jason@JacFab Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008 Location: Central Point, OR Posts: 5,685 View My Garage	I don't know how thick the stock sleeves are on the LFX, if it's anything like the LS1 you can't bore them out very far at all without resleeving. Darton Sleev makes a set of sleeves that would work with the LFX, which would allow a max bore of 98mm which would take you up to a 3.9L... Either way you go about doing something internally to gain displacement it's going to be expensive... The darton sleeves are ~$1800 not including installing them. If you want to do any kind of stroker affair via offset grinding, etc plan on custom rods, I was quoted ~1350 for 6 rods... Custom pistons either way. Going to a bigger piston would increase the compression ratio... There is some good discussion in the link that GretchenGotGrowl posted above, but in the end, you'd have to REALLY be a dedicated 6 cylinder fan to drop that kind of money on doing anything major like this. I'd love to see someone do it, but I think I will just be going down the forced induction route myself. Last edited by Jason@JacFab; 05-29-2014 at 09:56 PM.

05-28-2014, 12:09 PM	#4
robmol1 Drives: 2012 Camaro 3.6L 2LT Join Date: Apr 2013 Location: ONTARIO,CA Posts: 16	what if i just went same piston design just a bigger boresize of piston?

05-30-2014, 02:37 PM	#9
KMPrenger Drives: 16 Camaro SS, 15 Colorado Join Date: May 2009 Location: Jefferson City, Missouri Posts: 13,967	A bit off topic, but still on the topic of n/a power.....a guy called LMR and they claimed 40rwhp with just a ported head job on an LFX http://www.camaro5.com/forums/showthread.php?t=322763 But we haven't heard anything out of them in a long time so its likely the project died. Would still be an expensive project....except possible for someone like Jacfab here who could maybe do the whole thing themselves lol. __________________ 2016 Camaro 1SS - 8-speed - NPP - Black bowties 2010 Camaro 1LT V6 (Sold. I will miss her!)

05-30-2014, 09:13 PM	#10
Jason@JacFab Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008 Location: Central Point, OR Posts: 5,685 View My Garage	Thanks for the vote of confidence... However, I lack necessary machinery to install sleeves, bore, offset grind cranks, regrind cams, etc etc... Figure in another 2-3k for these magical unicorn heads that will pick up 40hp, on top of the sleeves, custom pistons, rods, etc etc etc... I bet a guy could easily wrap up 10k on this kick ass v6... Not a place where I want to allocate that kind of coin at the moment.