timmyg789

I recently traded my 14 mustang gt on a new vette. The widely accepted safe limit of hp to the wheels for my stang is around 600. I see many people on here pushing their vette's closer to 700 with meth. I will be putting a SC on in the spring soon as I get mine out of storage. Just wondering if its really safe to push this engine up to 650-700 with a good tune?

C7-Beast

Many tuners are saying 700 is safe. Anything more and you may granade the pistons which are the weak link in the LT1. Rods and pistons are forged.

I'm guessing you have a manual? If not, 700 is not going to happen with just a blower, Meth and Headers. Probably top out at about 650.

I made 696 RWHP with just 3 mods and an ECS tune.

timmyg789

Yeah I do have a M7. I was just curious because a lot of people on here seemed to be staying around 600...when adding meth doesn't cost all that much more to acheive 650-700. Seems like a no brainer to me if that power range is safe I will definitly add meth to my kit.

robert miller

Mike look at your statement here. Pistons are the weak link they are not forged. The crank is the best part in the motor then the rods. To the OP here still with what is said the motor will hold some what save to that with the meth. But still some weak parts in the car at the 700 rwhp..

0ProChargerTech

They both have their limits, and are pretty equal.

The Ford will have the Oil Pump Gear/Rod Bearing issue.
The GM will have the limits of the Pistons/Rod Bearings.

Safe tune on both and your goals are good.
But they are right at the end limits. (700 that is)

Do some get away with more...sure.
Do they last forever...not really.

jdarc1

Well being in the business, what do you feel would be a safe range for the LT1. If 700m is pushing it what would be a firm safe range for this motor in your opinion? Just curious .

C7-Beast

I would try to respond directly to this Robert but it makes no sense. Maybe writing it in English would help?

Since I have no idea what you are actually trying to say I'll take a few guesses...

If you are saying the LT1 can handle a lot more than 700 RWHP you're right. LMR has a C7 running around with ~900 RWHP horsepower on that STOCK internals. So what? The odds are the longevity of that engine will be affected and the piston will most likely be what kills the motor at some point. If people are willing to swap an engine in the first 20k miles, good for them. Most of us don't have that kind of cash.Many will take our tuner's recommendation not to exceed ~700 RWHP on stock internals.

If you are trying to say there are other weak spots in the engine, site your examples please. My tuner is arguably one the best on the east coast and he has said the M7 LT1 motor can handle a lot more than 700 but suggested new pistons and a clutch when you start getting towards 800 RWHP. Once you get in the 800 range, the half shafts may have issues and despite what is claimed, I think the auto would have trouble at 800 RWHP.

The other thing people need to consider is any car that gets over ~800 RWHP may spend a lot more time in the shop due to other broken parts. Whether a Mustang or a C7. I have a buddy that has 1000 RWHP on his C7 and it's at the shop more than on the road. Just food for thought....

Blackdevil77

If you don't mind me asking, who's your tuner on the east coast?

C7-Beast

Doug from East Coast Supercharging (ECS)

0ProChargerTech

600 wheel on strait pump
700 wheel on pump + meth

I wouldn't go past that, personally.

FYREANT

To confirm, these are Dynojet number recommendations correct? Or are we talking mustang Dyno numbers? (since there is about a 10% difference between them)

jdarc1

Its a dyno pack

0ProChargerTech

When set up correctly, I have not seen that difference in % before.
It seems some people play with the "weather" settings a bit in the DynoJets to get higher then expected numbers.

But here in KC, we tested the same car on the same day on three different brand dynos. (mustang, dynojet, dynocom) and it ended up within 2hp on all runs.

Weather is a factory, the way people set their stuff up is a factor, what smoothing they use, and STD/SAE etc.

FYREANT

ok then so for these numbers I assume to be on the same page we are using Smoothing 5 and SAE correct?

Quicktime_GT

S550 Coyote engines are impressive - the move to forged rods opens some new doors. There are multiple 15+ cars catting around at 800-1000hp with stock bottom end.

jdarc1

What about the boost , is 11.2 to much for the LT1 engine?

BooSSted

I'm curious, do any of the 3 mod 700hp C7's have some track times with trap speed? And boost numbers don't blow motors. Some of the other tuners touched on it. The Pistons aren't the weak link. (Granted the rods and crank are forged) If pistons are going you're experiencing detonation. A timing thing, too much power you'll see rod failure.