ORIGINAL: badz
The 2.5R's and 2.5's basically same engines are cake to tune. If you can tune a OS or other engine you sure shouldn't have a problem with a 2.5R. Most peoples problems are fuel....2.5's are fussy with the fuel they use
I'll go check out a quart of the red alert fuel then and see what happens, I never thought that the fuel would make that much of a difference..