Fast ass ZJ

Probably a stroked 360. think 3.79 stroke. 4.00 is the more popular 408 kit
 
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I love how ridiculously smooth and controlled the launch is. It looks slow, yet it gaps everything right off the line. I guess a stripped down ZJ is probably close to the 3000lb mark, with AWD/4wd. Not a bad platform. Though personally I would go for an XJ. Lighter and more aerodynamic.
 
@jeepinmatt
Is the xj more aero than a zj? I didn't think they were.. though, it is certainly a bit lighter.

Edit: column after the year is the drag coeff, lower # less drag.

Screenshot_20181230-221256.png
 
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Meh,worlds fastest title don't hold much credibility w me.How do they "know" its the worlds fastest??? Have they checked every garage,basement,shed,barn,or warehouse in the world,to make sure their isn't anything faster?? No!!
 
a_kelley said:
@jeepinmatt
Is the xj more aero than a zj? I didn't think they were.. though, it is certainly a bit lighter.

Edit: column after the year is the drag coeff, lower # less drag.

View attachment 283097
Click to expand...
Interesting, I figured even though the ZJ was sleeker, it had a lot more frontal area than an XJ. I stand corrected. I forgot just how compact and simple ZJ's were.
 
1-tonmudder said:
Meh,worlds fastest title don't hold much credibility w me.How do they "know" its the worlds fastest??? Have they checked every garage,basement,shed,barn,or warehouse in the world,to make sure their isn't anything faster?? No!!
Click to expand...
Pretty simple really. Anyone who builds something fast wants to tell everyone about it, so a quick youtube search pretty much takes care of it. :lol:
 
a_kelley said:
@jeepinmatt
Is the xj more aero than a zj? I didn't think they were.. though, it is certainly a bit lighter.

Edit: column after the year is the drag coeff, lower # less drag.
Click to expand...

You're looking at the wrong column; the Cd is only a coefficient and is meaningless without frontal area in terms of aerodynamics and power to overcome drag force. Your interest is drag area, which is CdA, not Cd. Cd doesn't tell you very much by itself, and a lower number does not necessarily equal less drag.
For example, a passenger jet may have a lower Cd than a XJ, but the jet also has a shitload more frontal area than an XJ, so CdA is very different.

I went and searched out that list, and the last column (not shown in picture) is the important one. It's no surprise that (of everything on that list) unless you have a Ram 1500 quad cab or Merc G-Wagon, a Wrangler has the worst aerodynamics of anything you can buy.... before it's wrecked even more by lifting it, etc.

jeepinmatt said:
Interesting, I figured even though the ZJ was sleeker, it had a lot more frontal area than an XJ. I stand corrected. I forgot just how compact and simple ZJ's were.
Click to expand...

You're correct, the ZJ does have more frontal area than an XJ. But, because the Cd is significantly lower for the ZJ, the drag area (CdA) is still lower for the ZJ when you multiply the Cd by the greater frontal area.
So, the ZJ has lower drag, even with greater frontal area than an XJ.
 
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Fabrik8 said:
You're looking at the wrong column; the Cd is only a coefficient and is meaningless without frontal area in terms of aerodynamics and power to overcome drag force. Your interest is drag area, which is CdA, not Cd. Cd doesn't tell you very much by itself, and a lower number does not necessarily equal less drag.
For example, a passenger jet may have a lower Cd than a XJ, but the jet also has a shitload more frontal area than an XJ, so CdA is very different.

I went and searched out that list, and the last column (not shown in picture) is the important one. It's no surprise that (of everything on that list) unless you have a Ram 1500 quad cab or Merc G-Wagon, a Wrangler has the worst aerodynamics of anything you can buy.... before it's wrecked even more by lifting it, etc.



You're correct, the ZJ does have more frontal area than an XJ. But, because the Cd is significantly lower for the ZJ, the drag area (CdA) is still lower for the ZJ when you multiply the Cd by the greater frontal area.
So, the ZJ has lower drag, even with greater frontal area than an XJ.
Click to expand...
Excellent clarification. I forgot about all those other factors that play in. It's been at least a decade and a half since I even looked at an equation.
 
When the front end looks like this;

upload_2018-12-31_5-31-22.png


Frontal area and CdA's based on stock data ain't gonna be accurate anyway...
 
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