LTX and LSXPutting LT1's, LS1's, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects, including repairs, swap info, and performance upgrades.
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I'm trying to see how much weight I will be shedding after some changes made to my 92 Camaro Z28. I need help finding some some item's weight. Mainly LSX swap parts
Replacing the 350 TPI engine with an LS3 6.2L Crate Engine
Replacing The factory K member with spohn K member and engine mounts
Replacing the factory Crossmember with a spohn crossmember
What do the cloth front seats weigh?
How much weight do you think I would loose by running true duals, no cats, and flowmaster delta 40's versus the stock exhaust setup.
The LS3 is about 100 # lighter than your old SBC. If you care about weight, a 3.5" or 4" single exhaust is much lighter than 2.5" duals. The 4" definitely far outflows dual 2.5s, and is still as good a fit. A single 3.5" is actually a better fit than true duals.
For the exhaust, you may not lose anything by running true duals, you'll probably gain weight from a complete extra pipe going to the back and another muffler.
I've heard you can get just as good of performance from say a single 3.5" as opposed to dual 2.5" or something like that. I am not sure on the performance factor so much but there are plenty of threads in the exhaust section about this type of thing.
i haven't done the calcs to justify it yet, but as far as fluid dynamics, i think a 4" will flow 3-4 times as much as a 2.5", so about 1.5 - 2 times as much as 2.5" true duals. thats what i plan to run eventually when i get that far. and it sounds like it'll be a lot easier to route than true duals.
