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6.4 damper pulley for VVT 5.7?

5K views 3 replies 3 participants last post by  ronan978 
#1 ·
When I did the cam on my Gen 1 5.7, I found a used 6.1 pulley for cheap. The 6.1 pulleys are something like 10% underdrive so I figured why not free up a few HP while I have things apart. All I had to do was use a 6.1 belt and everything worked great.

Now I'm helping my son plan a cam and some mods on his 2013 Charger R/T and don't know much about the Gen 2 5.7
My questions:
1) Is the 6.4 pulley underdriven compared to the VVT 5.7 pulley?
2) If so, does it fit (with a belt change)

I searched the forum and all the info seems to relate to the Gen 1 swap that i have already done, no info on the Gen 2 or 3 engines.
Yes, I know that underdrive pulleys are not worth it as a stand alone mod. Yes, we are not planning on buying a $300-400 aftermarket pulley.
Thanks!
 
#2 ·
Anybody?
 
#4 ·
I have a spare 6.4 in my shed. I can get some measurements if you like. What dimensions are you looking for ? Overall diameter should really be the only difference I would imagine.


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