Timing vs serpentine belt to run cp3

Machineman

Veteran Member
Joined
Aug 25, 2014
Location
ontario canada
TDI
2007 RS4 Titanium 3.0TDI & 2013 Touareg TDI & B6 S4 BHW Swap Biturbo
What are others thoughts on running the cp3 off the crank on a 3.0tdi 20mm htd or a simlar width poly v serpentine belt ? My concern with the serpentine is when its wet it mite slip and cause fueling issues
 

Macradiators.com

Veteran Member
Joined
Nov 2, 2015
Location
Romania
TDI
2.0 CR 360hp
I would keep it on the timing belt. Dont understand why you would do it on the other belt. Much easier also to mount it in the right place.
 

Machineman

Veteran Member
Joined
Aug 25, 2014
Location
ontario canada
TDI
2007 RS4 Titanium 3.0TDI & 2013 Touareg TDI & B6 S4 BHW Swap Biturbo
Im gonna go timing belt just not off the camshaft i wanna run the pump at a overdrive ratio and this is impossible with oem parts so if im goin custom i mise well just run it off the crankshaft can anyone comment on a good overdrive ratio im thinking somewere in the neighborhood of 1.2:1 to 1.5:1
 

2micron

Vendor
Joined
Mar 23, 2012
Location
Canada
TDI
None
No more than 1.2:1
That CP3 will fade away close to 6000rpm.
Otherwise, run a 110 series pump, slightly less than crank speed.
This will also save a quite a bit on driven losses.
 

Macradiators.com

Veteran Member
Joined
Nov 2, 2015
Location
Romania
TDI
2.0 CR 360hp
I dont know if there is a longer timing belt that could be used so we can use a bigger wheel on the CP3 pump in order to run it at lower rpm.
Right now we run it at crank speed like the oem pump.
 

Machineman

Veteran Member
Joined
Aug 25, 2014
Location
ontario canada
TDI
2007 RS4 Titanium 3.0TDI & 2013 Touareg TDI & B6 S4 BHW Swap Biturbo
what vehicle is the best to source a cp3s3r110 from ? will a early duramax or cummins pump work ?
 

Macradiators.com

Veteran Member
Joined
Nov 2, 2015
Location
Romania
TDI
2.0 CR 360hp
CP3 from peugeot-renault is more than enough for your needs. No need to go R110 , dont need fuel for 6.000cc
 

hatemi

Veteran Member
Joined
Aug 25, 2005
Location
Finland
TDI
Audi A6 4F 3.0TDI
He is building a motor not a lawnmoer ; ) psa cp3 will not be enough...

Lähetetty minun Moto G (4) laitteesta Tapatalkilla
 

Kevinski4

Vendor , w/Business number
Joined
Aug 31, 2007
Location
Nebraska
TDI
'00 ALH Jetta GLS
Plenty of pickups out there running dual CP3s with the 2nd one run off a serpentine belt.
 
Top