DOHC heads on LSx from a Nissan Titan...read
#61
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Has anyone heard any news about the 5.5L 4-valve V8 that's been promised for the last ten years or so?
The following 2 users liked this post by Corvette Ed:
G Atsma (05-06-2020), wannafbody (05-07-2020)
#63
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
By the time you get DOHC on an LS it's going to be the size and weight of a big block, so why not just go with a big block?
#64
11 Second Club
iTrader: (3)
#65
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
#66
10 Second Club
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
my 78 C10 is faster with a cam only ls1 than it was with a cam only 454
ls1 definitely doesn’t have the low end grunt that the 454 did but that’s just cubes
#67
11 Second Club
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Don't need DOHC's a 2,000 HP capable standard deck LSX block is really a better overall engine design than the older GM production blocks for making power. Don't get me wrong I love the BBC but a boosted 5.3 in stock form can out perform a performance built BBC. How much do you hear about BBC's being turbocharged? I'm not talking about $6000-$10000 BBC blocks either. A twin turbo'd LSX427 on methanol would be pretty nasty!
#68
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Don't need DOHC's a 2,000 HP capable standard deck LSX block is really a better overall engine design than the older GM production blocks for making power. Don't get me wrong I love the BBC but a boosted 5.3 in stock form can out perform a performance built BBC. How much do you hear about BBC's being turbocharged? I'm not talking about $6000-$10000 BBC blocks either. A twin turbo'd LSX427 on methanol would be pretty nasty!
The following users liked this post:
01CamaroSSTx (05-07-2020)
#71
11 Second Club
iTrader: (3)
#73
TECH Enthusiast
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm sure it's a badass setup, but I just don't see it getting big. It'll be good for big power drag cars I'm sure, but it's not going to get swapped into everything like LS's will, and that's just because it's not being used in a performance application where the aftermarket can thrive. That and I think most people want diesels in their F250s and F350s, so I the market isn't going to be flooded with them by any means.
#75
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Well, it was a step in the right direction, but I would like to see a much better flowing head. Why even bother trying to keep the complicated canted, offset valves, when an online setup worked so well on the LS. I know the new 6.6L will be good enough to compete with Godzilla 9n the production hd truck market, but for hot rods, off road and racing, I'd like to see a 4.840" bore spacing with inline valves and raised rectangular intake ports. Or, maybe they could just develop a good small cross section port on the DRCE casting for the 8.1 block, then make a new casting with as cast ports ready to run, and able to outflow all these high dollar, finely crafted bbc heads that are using every trick in the book to overcome the ancient, flawed from the start bbc port layout.