LY6 6.0 or 454

[87National]

No accessories/harness/ecm. Accessories and ec, I can get cheap, and I am not smart or patient enough to modify stock harness so no biggie.

Tell me about your LS setup?

I have a 4.8/4l60e in an 86 442. It has a mild cam but is otherwise stock. It is a great daily driver......gets 20 mpg, makes a little over 300 whp, and is extremely reliable.

 

[fleming442]

No comment

 

[69hurstolds]

No comment

Oh, I think you have a comment or two. And I can pretty much guess what they might be! 🙂

 

[olds307 and 403]

Oh, I think you have a comment or two. And I can pretty much guess what they might be! 🙂

Mine would be worse🤐. No excuse now that the 307 can be brought to 380 ci. Imagine a swirl port 380😂.

 

[el camino ss 84]

454 with a aftermarket efi setup and overdrive transmission and then daily it.

 

[Sean80monte]

Put a ls3 with 4l80 in 80 Monte. Driveablility is awesome. Ly6 is great starting point.

 

[Malibu795]

if I ran a LSx based engine it would have to be a 6.0 with a 4" crank..
currently I have a 468 BBC in my.. avg 13mpg mix and 18-19 freeway with a carb with small flat tappet HYD cam and 049 heads..
do it again,., some ~265cc intake aftermarket ovales.. 22X/[email protected] HR cam with ~.600-.650 lift with a 4.25 crank and EFI should put it low-mid 500HP/TQ range
auto would definitely be a 4L85

 

[69bigblock]

I had a 454, 600hp, manual valve body th350,4.10 rear..in my 69 nova for years.. ran 11.10. It was fun to drive around town.. Sold the engine/trans and swapped in a stock 04 GTO LS1/4l60e makes 338rwhp... best thing I ever did.. it’s fun to drive short/long trips.. runs cool, starts up perfectly.. granted it’s the overdrive that makes a big difference..