Engines in RSS question

[Scarecrow]

Given how much bigger RSS makes the planets, and how much further you have to go before leaving the atmosphere, does RSS modify the behaviour of the stock KSP engines in any way to fit in with those changes?

[Gaarst]

RSS does not change engines.

If you want engines and tanks with performance similar to real ones, you can use SMURFF which simply tweaks masses and Isps to get payload fractions close to actual rockets, or Real Fuels which completely changes the stock LFO system to actual real fuels with realistic characteristics.

[Scarecrow]

I think SMURFF might be worth looking at for what I am doing at the moment.  Thank you.

[Nightside]

8 hours ago, Scarecrow said:

I think SMURFF might be worth looking at for what I am doing at the moment.  Thank you.

Smurff is definitely what you want.