[ender2664]

Has anyone blown a lt1 running under 10psi?

[MiamiBlueCamaro]

Like this?

[ender2664]

Originally Posted by MiamiBlueCamaro

Like this?

Considering that doesn't answer my question, no.

[Richie Carbone]

If the tune is way off it can happen.

Just remember, if it's man made it can break!!

[HumanWiki]

It can get blown even w/o the tune being way off.. The kid that bought my old Gen5 blew the motor up in less than 2 months by abusing it.. I ran that car hard, but always with respect and with proper gas... I even had a "safe" 91 tune on 8-9 PSI.

When you FI a motor, even a safe tune can end up with a blown motor.. Hell, you can pop one even w/o putting FI on it in the right circumstances.

[Modshack]

Go over to the Corvette forum...2+ more years experience on the LT1 there..

[ender2664]

I want to FI the motor but I'd hate myself if it blew :(
Partially because of the money and partially because she is my baby.

[Tr6]

You can always toss on a Maggy and run the 6 psi stock boost.

Humanwiki is correct though and even without FI people will still blow up their engines and cars up... Seen some people add the cheapest gas possible when the car should be running premium... or no oil changes in ages / too many miles...

[ender2664]

Always 91 and kaylee tells me when she wants an oil change

[hammdo]

Originally Posted by ender2664

I want to FI the motor but I'd hate myself if it blew :(
Partially because of the money and partially because she is my baby.

I think you answered your own question. While the tune is key, you have to pay to play. If you're ok with the risk, go for it...

-Don

[ender2664]

Originally Posted by hammdo

I think you answered your own question. While the tune is key, you have to pay to play. If you're ok with the risk, go for it...

-Don

No you do not
Lots of playing is free

[toohighpsi]

A "safe" tune is about 6-6.5 psi which is the sweet spot on 91 octane fuel, additional boost will not yield any additional power on straight pump gas. With 11.5:1 compression ratio you quickly hit a point of diminishing power returns due to the timing retard needed to run more boost.

Using better fuel (100 octane or so) you can run up to about 7.5-8 psi at which point you run out of capacity with the stock High Pressure DI fuel pump (the stock in-tank is fine).

Water/meth injection can add margin to this, but it is not without concern. First and foremost - once the car is tuned for running with meth injection, any failure of the meth system (electrical, pump, nozzle, or simply running out of meth) without warning almost guarantees failure of the engine. Good systems should have failsafe controls to prevent this.
Fuel added before the throttle body (and being relied on for fueling) raises the issue of distribution in the manifold, air has the ability to change direction faster than a liquid. This can cause some cylinders to have a different AF ratio than others and potentially could cause failure in a lean cylinder with an otherwise good working meth injection system.

There are systems with a powertrain warranty (Magnuson 3yr/36K included with 5yr/60K available and Edelbrock with included 3y/36K), these are a great options to add power if you have concerns about durability.

[1KillerSS]

Originally Posted by hammdo

I think you answered your own question. While the tune is key, you have to pay to play. If you're ok with the risk, go for it...

-Don

Don is 100 percent correct, you do have to pay to play, unless your on a test drive.....One way or the other, you have paid for your power, its up to you if you want more.

FI by itself does not mean a sure ticket to engine failure. HOWEVER, horsepower always finds a weak link....So do like others have suggested, make sure you have a competent tuner, someone who has tons of gm experience. Finding one that has hundreds if not thousands without a failure is going to be hard, not impossible, considering what people do to their cars once there out of the shop that builds them.

Originally Posted by toohighpsi

A "safe" tune is about 6-6.5 psi which is the sweet spot on 91 octane fuel, additional boost will not yield any additional power on straight pump gas. With 11.5:1 compression ratio you quickly hit a point of diminishing power returns due to the timing retard needed to run more boost.

Using better fuel (100 octane or so) you can run up to about 7.5-8 psi at which point you run out of capacity with the stock High Pressure DI fuel pump (the stock in-tank is fine).

Water/meth injection can add margin to this, but it is not without concern. First and foremost - once the car is tuned for running with meth injection, any failure of the meth system (electrical, pump, nozzle, or simply running out of meth) without warning almost guarantees failure of the engine. Good systems should have failsafe controls to prevent this.
Fuel added before the throttle body (and being relied on for fueling) raises the issue of distribution in the manifold, air has the ability to change direction faster than a liquid. This can cause some cylinders to have a different AF ratio than others and potentially could cause failure in a lean cylinder with an otherwise good working meth injection system.

There are systems with a powertrain warranty (Magnuson 3yr/36K included with 5yr/60K available and Edelbrock with included 3y/36K), these are a great options to add power if you have concerns about durability.

Again, while I don't have a 6th gen, and have not had the chance to look over the new PCM and all of its parameters. There are many ways to implement fail safes for meth injection. One feature of mine, for example, uses the MAF temp reading, and if the meth fails, it pulls timing and the car will fall flat on its face.

One generic way, that will work on all cars no matter the manufacturer or FI system, is from AEM, they have a fail safe that monitors the flow rate. It can be wired a few different ways to kill the engine, or protect it from catastrophic failure.

OP be aware, that your engine could implode just while driving down the street NA. Just going FI by itself does not mean your at greater risk either. If you install all the supporting mods, and the work is done by a competent professional, you should have an enjoyable system that will last many miles. Like others have said, this engine does not need a whole lot of boost to respond. So go with a low amount (which is what all the FI manufacturers are recommending) of boost, and start burning gas and killing bugs!

[toohighpsi]

Originally Posted by 1KillerSS

There are many ways to implement fail safes for meth injection. One feature of mine, for example, uses the MAF temp reading, and if the meth fails, it pulls timing and the car will fall flat on its face.

One generic way, that will work on all cars no matter the manufacturer or FI system, is from AEM, they have a fail safe that monitors the flow rate. It can be wired a few different ways to kill the engine, or protect it from catastrophic failure.

Completely agree, just pointing out the potential pitfalls that exist out there. I have just picked up the AEM system for some testing, good to hear that they have incorporated some failsafe options in their design. I'll be sure to post my experiences with the AEM system.