CP3 Question

[TNRGreene]

I was just told that a LLY CP3 flows more volume of fuel then a LMM CP3 however the LMM pump recovers pressure faster.
What I forgot was that he said LBZ/LMM pump were smaller & that's why the recovered quicker & kept higher rail. I understand the higher rail but will the smaller volume be a concern & when?
What's the real deal.

 

[McRat]

My testing showed that putting on a LBZ pump with no other changes raises the HP and keeps higher rail pressure. Not by alot.

 

[McRat]

What I forgot was that he said LBZ/LMM pump were smaller & that's why the recovered quicker & kept higher rail. I understand the higher rail but will the smaller volume be a concern & when?

No, IIRC, the bore and stroke is identical. The valving is the difference. IIRC, the LLY = 105 and the LBZ+ = 110. So about 5% gain according to Bosch.

 

[TNRGreene]

That is what I remembered also but was told today differently.