Thread:MVP EdwardJ/@comment-4850381-20130129042742/@comment-4850381-20130129080037

How much power you add to your cars? Do both cars have modify higher rpm than in stock form? Because when a engine can get more power without boreing (increasing displacement of an engine EX: X liters to Y liters) by either forge pistons, custom crankshaft, enlarge fuel injectors and etc. or increasing the redline rpm of the engine. The S15 engine is cheaper to tune because the engine is a straight 4 cyclinder engine with 1 Dual Over Head Cam instead of 2 used in the V-engines or the flat engine (your matess gts86 has the flat 4  cyclinder engine design). The Flat engine design is better for the track because of it's lower center of gravity. Porsches use flat engine design but with 2 more cyclinders. I have heard of people swaping out 4 cyclinder straight design engines for a v8 engines. I guessing you might be able to cram in a 4 liter v8 into your engine bay but its alot of work and money.