[Evil-Bee-NH]

I can imagine that has had quite a few broken parts unless they upgraded the internals. Which we can do through ZZP now.

[ChicagoTommy]

Originally Posted by ron scubadiver

With 30 psi boost, that motor doesn't go far between rebuilds.

Originally Posted by Mr. Wyndham

That's crazy...

I, too....want to know how often they have to rebuilt that, or have failures...

Manifold pressure has little to do with requiring engine rebuilds. The amount of power vs. materials used would dictate when rebuilding would be necessary. 650HP via boost or natural aspiration would produce similar forces on the parts. It's not like adding a 350HP hit of nitrous to a 300HP engine, that would be similar to constantly hitting the pistons with a sledgehammer.

[SSDan]

Originally Posted by ParisTNDude

Those HP numbers are entirely possible for Chevy 4 cylinder cars. Some years back, a Chevy Cobalt set the world 1/4 mile drag strip record for a 4 cylinder car running low 6 second ETs. I googled it and found an article on the car but I'm not sure if he's still running it. How does 1850 HP sound?

http://www.woodstocksentinelreview.c...econd-screamer

Strange - the way I read the article the Cobalt was running what they called a "mountain motor" big block Chevy engine that made 1850 HP NA. Did you maybe link the wrong article?

[Mr. Wyndham]

Originally Posted by ChicagoTommy

Manifold pressure has little to do with requiring engine rebuilds. The amount of power vs. materials used would dictate when rebuilding would be necessary. 650HP via boost or natural aspiration would produce similar forces on the parts. It's not like adding a 350HP hit of nitrous to a 300HP engine, that would be similar to constantly hitting the pistons with a sledgehammer.

But surely...650hp out of 2.0L is creating a bit more stress and wear on parts than 650hp out of 6.2L.....I agree it's an issue of materials/parts used vs just pressure alone.

....but there is a relationship...

[ChicagoTommy]

Originally Posted by Mr. Wyndham

But surely...650hp out of 2.0L is creating a bit more stress and wear on parts than 650hp out of 6.2L.....I agree it's an issue of materials/parts used vs just pressure alone.

....but there is a relationship...

Yes, I fully agree! A 6.2L piston will have a significantly larger area to distribute the force than a 2.0L piston. But this is cylinder pressure, not manifold pressure. Manifold pressure is essentially irrelevant since cylinder pressures are 20x higher! That was my point. It just irrationally irks me when people make uneducated comments about 'dur all thems boosts is gon' wear ur enginez out'. You know what I mean? And I'm not referring to you.

[Mr. Wyndham]

Originally Posted by ChicagoTommy

Yes, I fully agree! A 6.2L piston will have a significantly larger area to distribute the force than a 2.0L piston. But this is cylinder pressure, not manifold pressure. Manifold pressure is essentially irrelevant since cylinder pressures are 20x higher! That was my point. It just irrationally irks me when people make uneducated comments about 'dur all thems boosts is gon' wear ur enginez out'. You know what I mean? And I'm not referring to you.

durrr, whut?


I gotcha now, just wanted to clarify since you seemed to reply to me.

I made my comment based on the sheer power density of the thing.


derrr.....

[ParisTNDude]

Originally Posted by SSDan

Strange - the way I read the article the Cobalt was running what they called a "mountain motor" big block Chevy engine that made 1850 HP NA. Did you maybe link the wrong article?

I might have quoted the wrong Cobalt, but here's one for certain and probably the one I was looking for:

[Michigan1LTRS]

Wow, that is BAD!!!!

[Stryfe]

Originally Posted by my1stchevy

putting V8s to shame...

Hardly.

That motor running 30 pounds of boost as mentioned in a previous post wont last long between rebuilds.

Sure, 650hp is really damn impressive, but hardly puts V8s to shame. A 6.2 on 30 pounds of boost would be well over 1000whp, and would handle the power better.

I came from imports. I've had my share of 400whp 240sx's, and whatnot. I'll tell you first hand I'd take the 6.2L 450hp LT1 over those any day of the week. The power is much more usable, and starting with 450hp stock is a lot easier than starting with a less powerful 4 cylinder engine. Not to mention you can spool bigger turbos with the larger displacement engine.

[Corner carver]

Originally Posted by Stryfe

Hardly.

That motor running 30 pounds of boost as mentioned in a previous post wont last long between rebuilds.

Sure, 650hp is really damn impressive, but hardly puts V8s to shame. A 6.2 on 30 pounds of boost would be well over 1000whp, and would handle the power better.

I came from imports. I've had my share of 400whp 240sx's, and whatnot. I'll tell you first hand I'd take the 6.2L 450hp LT1 over those any day of the week. The power is much more usable, and starting with 450hp stock is a lot easier than starting with a less powerful 4 cylinder engine. Not to mention you can spool bigger turbos with the larger displacement engine.

And if the 6.2 made the same hp/L it would be around 2000hp... Just saying...
30psi of boost isn't as big a deal as it was 15+years ago, these engines will demand 20+psi stock; no argument that a 650hp 2.0 will have a vastly different power curve than a 650hp 6.2.

Also, although the 2.0 can be built to support 'like V8' power you can't cut 200lbs out of the 6.2... To each his/her own

Just want to be clear: no hate for any of the engine options here... They all have their own strengths and weaknesses...
And there's nothing like the sound of an open exhaust Chevy small block

[Michigan1LTRS]

Originally Posted by Corner carver

And if the 6.2 made the same hp/L it would be around 2000hp... Just saying...
30psi of boost isn't as big a deal as it was 15+years ago, these engines will demand 20+psi stock; no argument that a 650hp 2.0 will have a vastly different power curve than a 650hp 6.2.

Also, although the 2.0 can be built to support 'like V8' power you can't cut 200lbs out of the 6.2... To each his/her own

Just want to be clear: no hate for any of the engine options here... They all have their own strengths and weaknesses...
And there's nothing like the sound of an open exhaust Chevy small block

Some people get their cages rattled by threads like this. That's their own insecurity. Most though can appreciate the reality here. Hope it's your reality CC soon!!

[Corner carver]

Originally Posted by Michigan1LTRS

Some people get their cages rattled by threads like this. That's their own insecurity. Most though can appreciate the reality here. Hope it's your reality CC soon!!

Thanks for the encouragement! The weight vs. Hp thing was a 'heavily' considered internal debate when ordering the car (ya, I was thinking about my build way back then)... And even though I died a little on the inside not getting the V8, I just couldn't 'check the box' that added all that weight to the nose of MY car.

[Michigan1LTRS]

Originally Posted by Corner carver

Thanks for the encouragement! The weight vs. Hp thing was a 'heavily' considered internal debate when ordering the car (ya, I was thinking about my build way back then)... And even though I died a little on the inside not getting the V8, I just couldn't 'check the box' that added all that weight to the nose of MY car.

These turbos are fantastic cars. I've had V8 GTO's and Camaro's all my life. Been there done that. After the test drive there was no doubt I wanted the turbo. Absolutely love this car. It is SO light on its feet.

[Corner carver]

Originally Posted by Michigan1LTRS

These turbos are fantastic cars. I've had V8 GTO's and Camaro's all my life. Been there done that. After the test drive there was no doubt I wanted the turbo. Absolutely love this car. It is SO light on its feet.

If you haven't seen it yet check out my intro thread... It has some great pics of my old man's '76! http://www.camaro6.com/forums/showthread.php?t=466119