LS7 or 383 LS1
#1
LS7 or 383 LS1
im either going to build a new 383 ci ls1 for my rx7 or sell my current ls1 and buy a stock ls7 my goal is 550-600 fly hp and around 7k rpm which would be best for me?
#3
383 all day long....more simple engine internals...throw some arp rod bolts on and you're there for cheaper than buying ls7 components
If you're thinking about swaying from the ls1 then I'd do a sleeved ls2 and pull 454 cubes outta it reliably. You could also sleeve the ls1 and do a 427...many many options bro.
either way...you should burn that rx7 to the ground
If you're thinking about swaying from the ls1 then I'd do a sleeved ls2 and pull 454 cubes outta it reliably. You could also sleeve the ls1 and do a 427...many many options bro.
either way...you should burn that rx7 to the ground
#4
Stock LS7 is a nice engine but you can likely put something together that achieves your goals of 550-600 fwhp for a lot less. 408 or so inches in LS2 or 3 block with good heads should get you where you want to go.
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#12
I vote for the 383 as you already have an LS1 engine and I prefer having an engine with forged internals even with a smaller displacement.
The 383 will reach your hp target and will help you if you wanted to spray in future. The LS7 is a great engine but it has huge torque.
For a light weight body like the RX7, I'd rather go with an engine with high hp and less torque.
The 383 will reach your hp target and will help you if you wanted to spray in future. The LS7 is a great engine but it has huge torque.
For a light weight body like the RX7, I'd rather go with an engine with high hp and less torque.
#13
yeah i see your points my current engine makes 480 fly hp and 490 ft lb i will never spray it or use forced induction i also have the chance to get an ls7 for the right price which is what is drawing me to it
#19
If I was building an old school SBC I'd definitely go 383 (you can go bigger but definitely have to shell out some bucks). But on the LSx stuff, go as big as you can within your budget.