You need to stay with the same model number turbos. The outside physical characteristics in a specific turbo may be the same but they can have an infinite number of differences in the shape of the inside of the housings and the size and shape of the impellors. That is what decides when boost begins and how fast it builds. The goal is to match the turbo's performance to a specific engine's power curve. Having the boost coming up differently between the two banks of cylinders in your car wouldn't be advisable. Bruce Benson > I am going to replace one of my twin turbos. On ebay I see that there > are the same ones for sale but they have different specs. Like there > will be an IHI RHB5 VJ11, or an IHI RHB5 VJ14, or a VA59. > > Does it matter what spec they are or can I have two different ones on > my car. > > Thanks a bunch > Max To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/