Crimson's 2013 Boy Racer GT

[Grandpa]

Originally Posted by Crimson600+HP Yeah, this time blowing the engine was my fault. I ran it on the track, was flirting the line with the cylinder dead temps trying to balance the performance/overheating line. Moments later, I saw the gauge pegged and I immediately started to cool down. Too late, smoke coming out the rear. I am hoping the last time too. If I didn't have so much money in this car I probably would have fixed it and traded it in on a Camaro 1LE and called it a day. Replace the oil pump with some billet gears and that LS is good to go.

Sorry to hear about your luck. Unfortunately, these Coyote motors just don't like a lot of power. Anyone making over 550rw should be planning for a motor build. It's not IF it breaks, but when. And even with a built motor, the blocks are still very questionable at best. For big power, these cars need a very expensive full build up.

[DirtyD]

Originally Posted by Grandpa Sorry to hear about your luck. Unfortunately, these Coyote motors just don't like a lot of power. Anyone making over 550rw should be planning for a motor build. It's not IF it breaks, but when. And even with a built motor, the blocks are still very questionable at best. For big power, these cars need a very expensive full build up.

People have held the blocks to 1000hp levels without much issue.

[Grandpa]

Originally Posted by DirtyD People have held the blocks to 1000hp levels without much issue.

Just because a few people have made 1xxxhp for a couple of dyno pulls and then turn them back down for normal driving conditions doesn't prove anything. Kevin and I spoke with a couple of Ford engineers at SEMA about this and they admit the factory block isn't up to the task over anything 550rw+.

The fact is, the blocks are not up to the task of that much power on a regular basis and many, many people breaking them at 600rw on a normal basis only further proves that point. And honestly, it shouldn't be up to that because it wasn't designed for that, it's just that us car guys push the limits of our factory set ups beyond their designed for limits.

The motors are very light, very efficient, making great power for only 302 cubic inches. They are great for N/A sub 550rw power, no doubt about that. But anything more than that you are asking for a blown motor.

[DirtyD]

Originally Posted by Grandpa Just because a few people have made 1xxxhp for a couple of dyno pulls and then turn them back down for normal driving conditions doesn't prove anything. Kevin and I spoke with a couple of Ford engineers at SEMA about this and they admit the factory block isn't up to the task over anything 550rw+. The fact is, the blocks are not up to the task of that much power on a regular basis and many, many people breaking them at 600rw on a normal basis only further proves that point. And honestly, it shouldn't be up to that because it wasn't designed for that, it's just that us car guys push the limits of our factory set ups beyond their designed for limits. The motors are very light, very efficient, making great power for only 302 cubic inches. They are great for N/A sub 550rw power, no doubt about that. But anything more than that you are asking for a blown motor.

Are we talking the actual block or the internals? The internals are the weak spot that I have seen.

[Grandpa]

Originally Posted by DirtyD Are we talking the actual block or the internals? The internals are the weak spot that I have seen.

Both are weak really. Well, I mean that relatively. Don't get me wrong, it's a great high winding lil motor. I just mean that it's not the best choice if you're wanting to make big power. If you're happy with 550rw or less for a toy, then a stock motor'd 5.0 is fine. But, if you're wanting to go fast, a motor build is in your future with a sleeved block at the minimum. Hopefully at some point someone makes an aftermarket block that is able to handle big power because what is out there now is still breaking the same way factory blocks are.

[DirtyD]

Originally Posted by Grandpa Both are weak really. Well, I mean that relatively. Don't get me wrong, it's a great high winding lil motor. I just mean that it's not the best choice if you're wanting to make big power. If you're happy with 550rw or less for a toy, then a stock motor'd 5.0 is fine. But, if you're wanting to go fast, a motor build is in your future with a sleeved block at the minimum. Hopefully at some point someone makes an aftermarket block that is able to handle big power because what is out there now is still breaking the same way factory blocks are.

I guess I haven't really seen to block failures, just when people throw a rod, melt or shatter a piston. I completely agree with it eventually being on borrowed time, but I guess it seems you are exaggerating (from my view point) that time period to be rather quick, when in fact people have been running those high horsepower (500-600) applications for years now. VMP with their Boss, for example. 7xx whp and it's been through multiple track days in Texas and Florida heat.

I know the only true aftermarket option out there for a "high" power motor is MMR's Promod block, of which some people are still skeptical of their stuff sometimes. But it's been filled, sleeved, and decked completely, so I'd hope it holds. lol

[Grandpa]

Originally Posted by DirtyD I guess I haven't really seen to block failures, just when people throw a rod, melt or shatter a piston. I completely agree with it eventually being on borrowed time, but I guess it seems you are exaggerating (from my view point) that time period to be rather quick, when in fact people have been running those high horsepower (500-600) applications for years now. VMP with their Boss, for example. 7xx whp and it's been through multiple track days in Texas and Florida heat. I know the only true aftermarket option out there for a "high" power motor is MMR's Promod block, of which some people are still skeptical of their stuff sometimes. But it's been filled, sleeved, and decked completely, so I'd hope it holds. lol

I'm not exaggerating. I guess in your world, if you don't see it, it doesn't happen? I've seen several failures, but then again I'm around a lot of cars making real power and you're not.

Your viewpoint comes from a slow stock car, you don't race, never had a fast car and take everything you read online as facts. Before you do your usual kneejerk sensitive reaction, that's not a dig at you, just the facts. Get out and do some racing, you will see the failures happening. Most people only post the positives online to brag, but the failures rarely make it because of all the bashing that takes place. Failures happen, it's part of racing. Not a big deal.

Again, just because a car "can" make 600-700rw, doesn't mean it's going to last. Any Coyote out there making 550rw+, especially in power adder applications, are on borrowed time. Hell, that's normal tactic of some companies out there - turn it up for one Hail Mary dyno pull, make a number, inflate and tell everyone some stupid outrageous claim. "1000hp on stock motor!!" LOL, I'm sure it did...but not very many times and/or very long. hahaha.