I've increased the maximum speed of most of the smaller ships speed to about 8.0, it means they can go up to 8,000. You can do this on the files Main_PurchaseShipsPlayer.txt and the Main_PurchaseShipsEnemy.txt. Next, I changed the fighter engine so that they can be mounted on any ship. All you do is open up Main_Components.txt, and find the Fighter Engine component. Look for where it says:
Allowed Vehicle Types := Fighter
and change it to:
Allowed Vehicle Types := Ship, Fighter
I also changed the line:
Effect 1 Amount Per Level := 0.0
to the following:
Effect 1 Amount Per Level := 0.1
This change will make the fighter engine speed increase by 100 per level.
So at level 20 and I've gotten a level 20 fighter engine for each of the engine slot, My max speed is almost 3000.
I didn't change the Fighter Engine component stats in the Main_stores to make it purchasable. Instead, I've been hunting fighters and gambling for Fighter Engine drops. I think it's more fun when you have to work for it.