Alaska SS

Okay, I'm finally going to forge my motor. After almost three years of making 734whp and 8 months of 940 whp, all on the stock rotating assembly and with no issues at all, its time for some piece of mind.

I'm currently running a small 150 shot and a Si trim head unit on 6lbs. I want to turn the boost up and spray quite a bit more. I know what I want but what do I need?

It's hard to find anyone pushing one this hard without a complete new motor, block and all. Has anyone broke stock rods, crank, pistons, block? If so, why...detination, fatigue? What are the limits on factory parts?

I'm thinking keep the block but simply replace the entire rotating assembly. The $5M question is do I need too? Pistons are a must! The titanium rods scare me...brittle. The crank though????

Can anyone attest to parts failures at certain levels and cause of failure? Thanks for the info!!!

Unreal

For 1300 everything will need to be replaced. Sell the stock motor and start with a new block/setup.

Hib Halverson

The production block will fail if run at that power level for any length of time.

atljar

I would call ERL and discuss

stefuel

I'm sure you have your reasons but just curious, what's the application for 1,300 HP?

Alaska SS

I've looked everywhere and can't find anything where folks have broke them. Can you point me in the right direction? At what power level can i expect the stock block to fail? Is 1000 safe?

Alaska SS

Merica, drag strip and half mile. Mainly Merica! LOL

Michael_D

You would have to get the OE block converted to wet M.I.D. sleeves for that power level. As mentioned above, EAR would be a good place to start. Crank might hold up, but not for long. Rods and pistons will not.

It's not just detonation and/or pre-ignition. At 1300 hp, cylinder pressure is extreme.

0Anthony @ LGMotorsports

I don't know if I would push the stock one that hard, at least not without having a budget set aside for a new engine. I know of some guys with blowers in the 900 range on stock LS7 short blocks but even they said time was limited on how long it would go.

The highest I can remember that we went was 1086 rwhp on a twin turbo LS7. Engine was stock save for Mahle pistons with hellfire rings and one of our cam's. The rest was 100% stock but it only did dyno work and a weekend at the Texas Mile before removing it for a built engine.

Alaska SS

Makes sense...thanks. It's pushing 940 at the wheels now on the bottle and 720ish every day. I'm amazed we havent had any issues. It's been doing this for almost three years now. GM did good with this motor for sure. I want to get the car in the 8s but don't want to build the stock block if it's just going to break. Thanks again for the input.

BRING IT

I will be pushing the limits with the stock block. Hoping it will be finished up in a couple of weeks.

Alaska SS

What kind of power are you planning to make? It's hard to find anyone that has truly went for it. A lot if speculation but no hard data.

Mine won't be done until March but I'll keep you posted for sure.

BRING IT

I'm not sure where we will leaving it but I'm running twins with spray. I basically just refresh the motor and changed out the pistons to drop the compression. I will be running E85 as well.

Alaska SS

So awesome!!! Gonna be NASTY!!! I think we can make 1300 with my set up but I'm worried about the block. We'll set it somewhere around 1000-1100whp and leave it there unless we get a call out that requires a little more. LOL Keep me posted and I'll do the same. :-)

Unreal

Plenty of people have cracked the blocks at ~1000-1100rwhp. If you can build a 1300hp vette, the cost of a block is so small it shouldn't even be considered to be skimped on.

Based

Why the hell does anyone need 1300hp? If the z can do 10s with just a cam... What the hell does it do at 1300hp with the proper tires?

Unreal

Different types of racing. My car makes over 1300hp, and when racing I wish it had 300-600 more. 1/2 mile and mile racing need big power. When you are running 1500-2000awhp GTRs and Lambos, a 1300hp vettes gets left in the dust.

Based

Oh ok I see.

Mike44665

The only thing that separates men from boys is the length of their, er ah, price of their ah, horsepower, yea, yea, thats it horsepower. I knew it was something like that.

usmcpony

Im in Amelia, Ohio and I just went with the ERL block.