Lsx 427 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Sharp406 · 07-14-2015, 10:37 AM

Have a couple of questions, Have a friend wanting to sale a LSX 427 short block with Lunati Crank, rods, and pistons..for 5 grand, short block has 5,000 miles on it assembly has 0 miles. Stock heads and pan should bolt right up right? Also throwing in Arp bolts and T18 melling hv oil pump. Questions are good deal? What else would i need besides better heads and a tune?

Bizaro · 07-14-2015, 10:39 AM

Good deal buy it

Unreal · 07-14-2015, 11:54 AM

Assuming all is good, that is a good deal.

Different cam, and I wouldn't put stock ls3 heads on a 4.125 bore setup. It can work, but I would get some aftermarket heads ASAP, and a cam spec'd for a 427.

Pan bolts right on. Oil pump should go right on assuming it has the correct short crank. Make sure the crank is correct for your application. Same reluctor and snout length or that is a real pain to fix.

USAFS197 · 07-14-2015, 08:22 PM

Even stock LS7 heads would be better, no?

Unreal · 07-14-2015, 08:28 PM

For power, yes, for reliability, no.

christianchevell · 07-14-2015, 09:20 PM

The price is nice if you want to go heavy with a LSX iron block the question is why 5000 miles on the block and not with those parts.... ? just the bare block is like 2200 and can be made into a 500 cube stroker, so maybe someone went Dart block instead and pulled the internals? I bought a 428 stroker from Jerry at SAG performance he is on Ebay selling strokers you should maybe talk to him. I went new g.m. aluminum block as I am a daily driver and the internals I can always use later for a new block if I ever wear the new one out. Our blocks as you know are 1200$ throw away as they can only be honed .020 over and that's if the cast in sleeves are straight.... I thought about going cast iron and could have done it cheaper actually, yet quality is in various upper price range iron blocks, and they can be sleeved later and bored etc for a longer life yet weigh more but are after all stronger.

Just as with my old hot rods though marrying iron and aluminum means re-torque of the head bolts periodically as things expand differently and aluminum intakes would pit eventually also married up to iron mainly probably from the radiator fluid acidity.

On my ls3 stroker I had to get a mast Windage tray, and do not know about the LSX for compatability to ls3 parts, you should talk to a machine shop that knows. Just look UP LSX stroker 427 on ebay and you will find custom engine supply Jerry in Angola Indiana, he was a nice guy just a busy machinist.

Sharp406 · 07-16-2015, 11:25 AM

Well now he said he would take 3grand for it plus my short block, (has 36,000 miles on it) so debating I would still need heads, timing chain, cam and a tune that's all I can think? I'm still on the fence about it would be first time short block swap.

07-14-2015, 10:37 AM	#1
Sharp406 Drives: 2010 SS/RS 6 Speed Join Date: Feb 2015 Location: Oklahoma Posts: 32 View My Garage	Lsx 427 Have a couple of questions, Have a friend wanting to sale a LSX 427 short block with Lunati Crank, rods, and pistons..for 5 grand, short block has 5,000 miles on it assembly has 0 miles. Stock heads and pan should bolt right up right? Also throwing in Arp bolts and T18 melling hv oil pump. Questions are good deal? What else would i need besides better heads and a tune? Attached Images

07-14-2015, 11:54 AM	#3
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,716	Assuming all is good, that is a good deal. Different cam, and I wouldn't put stock ls3 heads on a 4.125 bore setup. It can work, but I would get some aftermarket heads ASAP, and a cam spec'd for a 427. Pan bolts right on. Oil pump should go right on assuming it has the correct short crank. Make sure the crank is correct for your application. Same reluctor and snout length or that is a real pain to fix. __________________ Nick Corvette Z06 -1200ish rwhp

07-14-2015, 08:22 PM	#4
USAFS197 Drives: 2019 Corvette Z06 Join Date: Jan 2014 Location: Navarre, Florida Posts: 1,691	Even stock LS7 heads would be better, no? __________________ 2019 Corvette Z06 3LZ 630whp, 701wtq: Halltech CAI, Corsa Double X-Pipe, AWE Touring Axle Back, LMP LT4 Lid, Pray 93 tune. DSC Sport V4 Controller (street/track alignment), fully lowered on stock bolts, BC Forged EH172's w/ Toyo R888R's.

07-14-2015, 08:28 PM	#5
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,716	For power, yes, for reliability, no. __________________ Nick Corvette Z06 -1200ish rwhp

07-14-2015, 09:20 PM	#6
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,583 View My Garage	The price is nice if you want to go heavy with a LSX iron block the question is why 5000 miles on the block and not with those parts.... ? just the bare block is like 2200 and can be made into a 500 cube stroker, so maybe someone went Dart block instead and pulled the internals? I bought a 428 stroker from Jerry at SAG performance he is on Ebay selling strokers you should maybe talk to him. I went new g.m. aluminum block as I am a daily driver and the internals I can always use later for a new block if I ever wear the new one out. Our blocks as you know are 1200$ throw away as they can only be honed .020 over and that's if the cast in sleeves are straight.... I thought about going cast iron and could have done it cheaper actually, yet quality is in various upper price range iron blocks, and they can be sleeved later and bored etc for a longer life yet weigh more but are after all stronger. Just as with my old hot rods though marrying iron and aluminum means re-torque of the head bolts periodically as things expand differently and aluminum intakes would pit eventually also married up to iron mainly probably from the radiator fluid acidity. On my ls3 stroker I had to get a mast Windage tray, and do not know about the LSX for compatability to ls3 parts, you should talk to a machine shop that knows. Just look UP LSX stroker 427 on ebay and you will find custom engine supply Jerry in Angola Indiana, he was a nice guy just a busy machinist. __________________ 2013 2SS/RS LS3 M6 ,CRT, NPP, Forged 428 ls3 stroker, GMPP ported heads, Katech chain, Mast windage, Cam Motion Cam, trunnion upgrade, Stainless Power headers HFC, CAI w/kit, Vmax PTD, Fluidampr, Powermaster xs 9509 starter, BMR strut brace,trailing arms, toes, bushings, Crossfire wheels & extreme contacts, elite catch can, clutch reservoir, dash/body LED, DRL rewire, Sparks badges, Forza 3way, tint, MRT louvers, ZL1 spoiler, MGW short throw, Monster dual LT1S clutch, bleeder, support, high vol pump, Speed hut shift light, ACC flames stripes, Driven ls30 oil, NGK TR6IX , Granatelli wires.

07-14-2015, 10:39 AM	#2
Bizaro Account Suspended Drives: 2015 Redhot 1LE Join Date: Feb 2013 Location: Westchester NY Posts: 1,409	Good deal buy it

07-16-2015, 11:25 AM	#7
Sharp406 Drives: 2010 SS/RS 6 Speed Join Date: Feb 2015 Location: Oklahoma Posts: 32 View My Garage	Well now he said he would take 3grand for it plus my short block, (has 36,000 miles on it) so debating I would still need heads, timing chain, cam and a tune that's all I can think? I'm still on the fence about it would be first time short block swap.