to start things off i know this is way out to left field but here is the story. My friend and i both have skyline GTS-T's. my buddies is in perfect condition with motor modifications to his RB20det such as 3"turbo back exhaust, Greddy front mount, tuned ecu, boost controller( run 11 psi on stock turbo). now my skyline looks to be stock other than the 3"turbo back. a little history on my car is that i imported it into canada and you can definitly tell the car has been raced hard with it having decals cover the outside of the car and the typical signs of it being baged.
so one day we decided to race just so see how much faster my buddies skyline is over mine(because oviously his has more mods than mine) but my skyline significantly beat his skyline. in dis belief we raced again to have the same result. we even switched cars to see if it was driver error but still nothing. so we oviously thought something was up with my friends car so looked over everything. compression test, looked for boost leaks, changed the oil, we even took it to shop to get inspected and his car pasted with flying colors. so then we started thinking about my car....... and we thought the only way my skyline could have beat his is A) upgraded to a RB25DET turbo or B) i actually have a RB25DET that looks like a RB20DET. now i want to hear your thoughts do you think a RB25det can look like a RB20det? or could it be something else?