Broken block? Check this out

[minivanracer]

so what are you saying. i was gonna do a vortech on 12psi , is that high boost

 

[Wicked97]

so what are you saying. i was gonna do a vortech on 12psi , is that high boost

We broke ours closer to 20 PSI

12 is still pretty low. You should be fine.

Also depends on the tune.

 

[stkjock]

so what are you saying. i was gonna do a vortech on 12psi , is that high boost

nope

 

[19COBRA93]

so what are you saying. i was gonna do a vortech on 12psi , is that high boost

The broken block I have was done at 11 psi, but it ran a bit lean up top on the dyno and let go. Pistons and rings were all fine. We thought it was a blown head gasket until we tore it down. It was an '11 GT with Boss pistons and rods, and a Procharger F1A. It made 706rwh on a pull just before that.

I'm not at all saying that's the limit, I'm just providing an example of what can happen, even at relatively low boost.

 

[Wnt2gofst]

so what are you saying. i was gonna do a vortech on 12psi , is that high boost

I've ran 11-12 for 6 months, drove across country, lots of track/highway pulls. Making a little over 700.

I really think its in the tune. Now also I personally wouldn't go over anymore less I was on race gas.

 

[Germeezy3]

The broken block I have was done at 11 psi, but it ran a bit lean up top on the dyno and let go. Pistons and rings were all fine. We thought it was a blown head gasket until we tore it down. It was an '11 GT with Boss pistons and rods, and a Procharger F1A. It made 706rwh on a pull just before that.

I'm not at all saying that's the limit, I'm just providing an example of what can happen, even at relatively low boost.

Please tell me that this isn't a possibility at 700 rwhp? I know of more than a few 3V builds over 700 rwhp, and even 2V builds over 700 rwhp without block failure issues.

 

[stkjock]

Search and read. It is possible and has happened. Been discussed a number of times here. The Coyote block has a less support in the water jacket area.

 

[Germeezy3]

Search and read. It is possible and has happened. Been discussed a number of times here. The Coyote block has a less support in the water jacket area.

I have heard, and read of the failures but I thought that they were more of an isolated issue blown out of proportion by the internet. I personally know, and have looked at a few cars recently making between 650-700 rwhp, and this changes my thoughts.

 

[19COBRA93]

Please tell me that this isn't a possibility at 700 rwhp? I know of more than a few 3V builds over 700 rwhp, and even 2V builds over 700 rwhp without block failure issues.

It is absolutely a possibility. The block on the prior 4.6L's don't have the same weak area and just don't fail. The Coyote block unfortunately has a weak spot. It's been addressed here with the new block. A lot of time and energy goes into a new block, it wasn't done for nothing.

With a good tune, 650-750rwh is probably fine. Even more. But it's a weak link, that's the hottest spot in the cylinder, and has the least amount of support. At those power levels any type of tune hiccup and it will be the first spot to fail.

 

[beefcake]

I have heard, and read of the failures but I thought that they were more of an isolated issue blown out of proportion by the internet. I personally know, and have looked at a few cars recently making between 650-700 rwhp, and this changes my thoughts.

you shouldn't have any issues at 700 with a decent tune

i made over 120 passes last year (2011) running as quick as 9.99

then, stepped it up to 1003 rwhp at the beginning of the year.

i ran through just over 1/2 a season before the block went there, i have no doubt at the 750 it would have been fine for some time

 

[19COBRA93]

you shouldn't have any issues at 700 with a decent tune

i made over 120 passes last year (2011) running as quick as 9.99

then, stepped it up to 1003 rwhp at the beginning of the year.

i ran through just over 1/2 a season before the block went there, i have no doubt at the 750 it would have been fine for some time

How much time would you say was spent tuning your car? I mean this as a serious question. Most people don't have the luxury of having a world class tuner spend the time with their car that has been spent on yours. It's fair to say your car was dialed in absolutely perfectly over many tuning sessions. Where as most people just don't have that option.

 

[Germeezy3]

I believe that the type of power adder may also play into the length of time before failure. I know of a lot of cars making 700 rwhp, and have never seen a local block failure but it seems that its more prevalent than I thought. With that being said as 19Cobra93 said it does not take much it seems to break a block.

 

[beefcake]

How much time would you say was spent tuning your car? I mean this as a serious question. Most people don't have the luxury of having a world class tuner spend the time with their car that has been spent on yours. It's fair to say your car was dialed in absolutely perfectly over many tuning sessions. Where as most people just don't have that option.

thats not necessarily true,

you have to remember, we spent alot of time testing different stuff and different combo's and constantly had to change the tune,

we went in with a brand new combo beginning of 2011, then swapped intakes after the first race, then swapped heads / cams to the jpcs after the 2nd race,

then added a converter

this year, swapped to blow through, then swapped f/p regulators and changed the fuel around, then changed tire heights,

the car has rarely been the same for more than 2 or 3 races

 

[Wnt2gofst]

How much time would you say was spent tuning your car? I mean this as a serious question. Most people don't have the luxury of having a world class tuner spend the time with their car that has been spent on yours. It's fair to say your car was dialed in absolutely perfectly over many tuning sessions. Where as most people just don't have that option.

There is least 15 hours dialing my car in perfect. From a/f, shift points, etc etc to be safe at 700whp. But a bad day of bad gas could end it all. I'm aware of that. And ready for that day really

I have seen a few hurt their engines/trannies. Then not have the funds to fix it. People need to keep this in mind.

 

[Phuck Phace]

Damn, when can us normal people purchase this block? I need one tomorrow. LOL

 

[keoni1984]

Damn, when can us normal people purchase this block? I need one tomorrow. LOL

They are not available for we serfs. Only for the rulers of the horsepower kingdom.. for now anyway. LOL

 

[SonicGT]

Why is it a race block only?

 

[keoni1984]

Why is it a race block only?

Where did you see that? It's for high horsepower applications, but could just as easily be used on the street from what I understand.

 

[stkjock]

Where did you see that? It's for high horsepower applications, but could just as easily be used on the street from what I understand.

That's the marketing approach FRPP is using.

 

[keoni1984]

That's the marketing approach FRPP is using.

Ohhhh, that would make sense.