Hi Guys,
Im hoping someone can give the information im looking for.
Im wanting to know if there is any difference between the different series of the 20b i.e the a, b, c, d series.
Is there any difference between ports, oil gallery's, e shaft basically anything?

Many thanks

 

the newer motors have stronger casting and e-shafts

the early models are better suited to N/A or low boost applications

 

Hi

I have a 20b D series and I beleive the main difference so I am told it the stronger e-shafts

Hope that helps
Cheers
paul