A Magnum based stroker: 6.7L or 408?

[Cuprum-74]

So I got into a little discussion with another Mopar fanatic here in UT. He's building a 408 Stroker just like me. Both of ours are based off of a 5.9 Magnum. We were discussing "callout badges" especially on hood scoops and rear quarter callouts.
I told him for nostalgic tastes I would stick to 408 cid, even though I'm doing a kind of a restomod build like he is.
But he said to be more accurate would be to use the 6.7L for Magnums as all modern Mopars use liter designations.
So now I'm curious what does everyone think?
Please keep it civil.

 

[tonysrt]

I think 6.8L would be 408. Keep it Cubic Inches. We have trouble with all that metric stuff. Just buy a 10mm wrench and you can fix anything.

 

[DNasty777]

It depends, are either of you using the Magnum valvetrain?

 

[RustyRatRod]

More accurate = cubic inches. 6.7 liters can cover a range of cubic inches. Your friend's an idiot.

 

[273]

Could use either, if in an older car/truck cubic inches makes more sense, if in 90's or newer either or. I only use 5.9l instead of 360 when being a magnum is relevant to the conversation.

 

[tjpatte]

 

[Newbomb Turk]

PISS ON THE METRIC SYSTEM.

 

[remytherat]

View attachment 1716365258

Don’t get me wrong, I ******* hate metric bullshit on cars, but it pains me that we used the metric system to get there.

And all science is metric because the unit conversions would otherwise be insane

 

[273]

Technically we use metric up here and probably the younger generations are more accustom to it.

For me it's a mix bag of which one I use for any particular thing, I'd say standard is how I mostly see things (feet, mpg, pounds) but metric does make more sense.

 

[junkyardhero]

counter-point: just put a V8 badge on and don't say nuthin'

tell the chevy and ford guys it's 273 and tell all the mopar heads that it's a 241 or something. watch the hilarity ensue.

 

[ch1ll]

View attachment 1716365258

PISS ON THE METRIC SYSTEM.

Right on brother.

 

[ch1ll]

Speak English (fluently without an accent I might add), measure in inches and lose the rag top(doo rags included BRO). BUY A BASEBALL CAP.

 

[mygasser]

tell your mate ''if you want to explain your engine size at every cruise and show then 6.7 it is'' if not put it in 'real money' at 408.

 

[Cuprum-74]

It depends, are either of you using the Magnum valvetrain?

As it was posted in the original message: " Both of ours are based off of a 5.9 Magnum."

So I'm with @RustyRatRod that 6.7L encompasses multiple CID's
Using 408 would indeed be more accurate and a good argument I can use against him
I mean this guy is a fair bit younger than me so he's used to all metric callouts that are used on modern mopars and other brand-X's.
407 = 6.66L
408 = 6.68L
409 = 6.7
410 = 6.72

@tonysrt
6.8L is actually 415+ CID

 

[RustyRatRod]

As it was posted in the original message: " Both of ours are based off of a 5.9 Magnum."

So I'm with @RustyRatRod that 6.7L encompasses multiple CID's
Using 408 would indeed be more accurate and a good argument I can use against him
I mean this guy is a fair bit younger than me so he's used to all metric callouts that are used on modern mopars and other brand-X's.
407 = 6.66L
408 = 6.68L
409 = 6.7
410 = 6.72

@tonysrt
6.8L is actually 415+ CID

In most instances, you'll find SAE is more accurate, but metric is "easier" supposedly. I'm proud to say I'll never find out. lol

 

[273]

It's definitely easier.

 

[RustyRatRod]

It's definitely easier.

I'll take your word for it.

 

[Kern Dog]

I am not one to adapt to modern stuff quickly and the Liter sizes are one of those things.
If an engine was called by a metric number from the start, I'd be more likely to keep calling it that. a 5.7 Hemi will remain a 5.7 Hemi but to muddy the waters a little, even Ma Mopar called the 6.4 a 392 for a few years.
The 5.9 V8 was a 360 from the start so to me, I only call them a 5.9 when they are in stock form.
When they are rebuilt with shaft mounted heads, screw that metric crap...it is a 360 in my opinion!
My 13 year old nephew has been coming around to work on cars and we are going to fix up the 72 Duster for him. When he asks of the engine sizes of the cars out back, i have to convert the cubic inches to liters to give him perspective....the 440 is 7.2 liters. The 440/495 is over 8 liters! His eyes get big when he hears of how big these engines are compared to new cars.