Twins Maybe? Super B Special is just too Big for me
Registered User
Joined: Dec 2006
Posts: 303
Likes: 0
From: Red Deer, Alberta
For 2nd Gens, the super B is the top turbo (an S300 measuring 58/65/13, .80 A/R). Not the special.
The bottom turbo is an S300 also, but much bigger housings - 66/77/20, with an A/R of 1.10.
A/R being the constant ratio of the area vs the radius of the turbine housing. If interested in learning more, read here....
http://www.turbominivan.com/tech/turbo201.htm
FYI - Best info I have is a Super B Special is a 64/71/14, with a .90 A/R.
The BD R-700 Race Twins (3rd Gen only) have a Super B Special on top and, I believe, an S400 under it.
RJ
The bottom turbo is an S300 also, but much bigger housings - 66/77/20, with an A/R of 1.10.
A/R being the constant ratio of the area vs the radius of the turbine housing. If interested in learning more, read here....
http://www.turbominivan.com/tech/turbo201.htm
FYI - Best info I have is a Super B Special is a 64/71/14, with a .90 A/R.
The BD R-700 Race Twins (3rd Gen only) have a Super B Special on top and, I believe, an S400 under it.
RJ
I belive the R-700's still has the regular Super B with a S400 under it. The new R-850 uses the Super B Special on top.
I have the Special and it's alittle laggy but not all that bad I can live with it but I do have a 5-speed though. I would trade your Super B Special off for just the regular Super B.
Here is some more info about there turbo's.
https://www.dieseltruckresource.com/...7&d=1235152419
Registered User
Joined: Apr 2004
Posts: 8,234
Likes: 1
From: Texas/Oklahoma Border
I belive the R-700's still has the regular Super B with a S400 under it. The new R-850 uses the Super B Special on top.
I have the Special and it's alittle laggy but not all that bad I can live with it but I do have a 5-speed though. I would trade your Super B Special off for just the regular Super B.
Here is some more info about there turbo's.
https://www.dieseltruckresource.com/...7&d=1235152419
I have the Special and it's alittle laggy but not all that bad I can live with it but I do have a 5-speed though. I would trade your Super B Special off for just the regular Super B.
Here is some more info about there turbo's.
https://www.dieseltruckresource.com/...7&d=1235152419
Interesting chart....especially since BD's web site does not even list a R-850 twin set??
The other curious thing is I personally measured my BD primary and it is a full 66mm?
What/Who is source of this chart.
RJ
Registered User
Joined: Dec 2006
Posts: 303
Likes: 0
From: Red Deer, Alberta
From what I have hear the R850 uses the Special with a S474 or S472 I cant quite remember which one. I also know there is a guy running a set on a 2nd gen so they must be able to fit with out too much trouble. With these new VP44 coming out I have been thinking about the R850.
Thread
Thread Starter
Forum
Replies
Last Post
smokin06
Performance and Accessories 2nd gen only
1
Jan 2, 2009 08:26 AM
Diesel Dave2
Performance and Accessories 2nd gen only
16
Dec 20, 2008 07:11 PM