well after having alot of fun with the LDK Pistons they finally gave out at 43k miles.

MODS: zzp upper and lower

-Hahn Catback with muffler delete
-Hahn Catless Downpipe
-Gm 3 bar map sensors
- K&N SRI
-Forge BPV
-Vaccum Tank Delete
E47 tune by James Rakes Haggerman. (25psi)


Ran a 12.36 @ 113 on this setup, an most of all. IT SURVIVED THE BEATING I GATE IT AT TXK16


I Knew that this time since my funds where up to par that i wanted to finally do a forged bottom end and upgraded valvetrain. so i went to town ordering parts.


Parts List:
-ZZP 4340 Connecting rods with arp 2000 rod bolts
-86MM Wiseco Forged Pistons
-ZZP 82# valvesprings
-ZZP Titanium Retainers
-ZZP Valve Locks
-Viton Valve Seals
-New intake and exhaust valves
-ZZP intake cam with upgrade Fuel Lobe
- Opel Injectors From Jeffrey Nelson Reiland
-Oem rod bearings
- All OEM gaskets (timing cover,head gasket, turbo line gaskets etc)







all fo the parts!






Cylinder #3 Carnage








More Photo's Coming Soon


























cleaned as much cokng off as i could before bringing to machine shop to wash. glad i made the extra effort









Ended up Stopping there for the night. the following day i put the turbo on, topped off all fluids, and started her up and went for a break in drive!!!







Catch can came in. Nice quality product!!



ZZP 50mm bov came in, should do for now

 

I don't see a thing wrong with that piston. Nothing some job weld wouldn't fix.
You got your miles out of that motor!
Hope the snail gives you want you want.

 

[QUOTE=SS_Bananna;7628448]well after having alot of fun with the LDK Pistons they finally gave out at 43k miles.

MODS: zzp upper and lower

-Hahn Catback with muffler delete
-Hahn Catless Downpipe
-Gm 3 bar map sensors
- K&N SRI
-Forge BPV
-Vaccum Tank Delete
E47 tune by James Rakes Haggerman. (25psi)


Bolded the problem.

Also, did you hone your block before dropping those pistons in?

 

Add a new tune to your rebuild. Im sure when you mentioned this to james he said it was your fault but hey his tune didnt melt a hole in your piston. Ldk is supposed to be sturdy, tuned LNF last longer than 43k

 

[QUOTE=leemanfor;7628451]

Nah thats not the problem lol. Im not an RPT nutswinger, but i beat the **** out of this car for those 40k miles. alot of track racing, drag racing, an air strip event, tx2k. and it was my daily that i drove out of town ALOT.

i'd say it held up fine for how much i did with the car.

 

This was an LNF Block with LDK pistons and rods. LDK pistons are weaker than LNF pistons.

this STOCK motor seen alot of agressive driving. The difference between a "longer Lasting" tuned lnf probably was ***** footing around and didnt drive the car nearly as hard as i did.

 

I've beat the **** out of my car for over 40k tuned and my piston doesnt look like that...

 

Right, But how agressive where you?

 

Sounds like rakes nuthugger at this point

 

28psi spike holds 26-27 on a KO4+, ran e47 at 24* for a year, WOT multiple times everyday. Went through a set of Continential DWS tires in less than 10k miles. It's a lot more aggressive than an KO4 can be.

I've driven a rakes tuned car, I'm not surprised to see a piston with ringland damage. I'd almost put money you had knock to blow a ringland like that, which on e47 is a tuning issue.

 

i have a shade room for you to take a seat in.... talk to me when your car run's the ET that i have on the stock turbo.

 

sounds like alot of spinning. my car was alway's on a slick dead hooking. thats alot more load strain on the engine than spinning.

 

keep all of that shade on the cobaltssgang facebook group with all of the NOOBS and stance guy. ecotec veteran right here. lol

 

bullshit, you blew a ringland. Thats knock. END of story.

 

It's a lot of aggressive mountain driving, wears tires way faster.

 

Thank you Ecaulk! Rakes tuning is garbage!

 

Brush up on your knowledge then. I wouldnt say im noob.

Thats more load on transmission not engine, stop sugar coating, accept the fact. Rakes tune did your car in, and excuse you about ET but i have a safe tune and my car runs, it looks like your car is going nowhere fast! Congrats.

 

My old cobalt lasted 100k+ beating the **** out of it with an EFR turbo on ethanol, and still runs to this day.

Your problem was tune related, not ldk piston related. That hole in the piston is due to knock. But hey, keep telling yourself that your tune wasn't the problem.

 

RIP engine

 

im not sugar coating anything lol. There are level's to this ****. Ive been around the ecotec world since late 2005. The tune that i was on when the ringland failed had no knock at all. the dyno graph was nice and smooth all throughout with no detonation in sight.

 

was down for only a month. New 1/4 mile times coming this sunday! should run some 12.0's this time out

 

I call bullshit, I run 22° on the R at 26psi safely on E47, i dont see you being able to do pull after pull at 24° without knocking like crazy, sorry but not sorry, accept that it was the tune. And idc how long youve been around ecotecs, there are plenty of techs out there that have been around cars for years and are still low grade techs just because they csnt fully grasp the concept.

 

nah tune was not nocking one bit

Knock is not nearly the Ringland fail when the ring gap is to tight for the amount of cylinder pressure,and heat in the cylinder. The Piston ring expands so much that the ring end gap completely closes, causing stress on that ringland to either crack it, or completely break off the top of the piston.

Stock pistons and stock Ring end gap is the cause of ALOT of lnf and LDK ringland failure.

Ive Built 4 LNF bottom ends for guys along the gulf coast in the pass two years, its the same case everytime. one guy was only on a GMSTG1 tune and had ringland failure after 10k miles on the tune.


Knowledge comes with experience.

 

Its funny how everyone and there mom will chime in with these exagerated mystery Stock motors lasting 100k+ miles. Be for real, probably drive it like a paw paw.

Just like when i post my 1/4 times . i get the "i did that on street tires" reply's.

 

Enter the Shade room then buddy.