Cool Fuel, VL and New Pump Discussion
08-23-2019 | 12:59 PM
#11
Registered
Joined: Nov 2004
Posts: 14,154
Likes: 3,714
From: On A Dirt Floor
Cell...the link below shows a update kit from Nautique from an extinct older version - pump and filter are in one unit mounted top right (vertical on the front of the engine - short runs to injectors and return) and the lift pump
https://www.nautiqueparts.com/product/retro-fcc-kit/
https://www.nautiqueparts.com/product/retro-fcc-kit/
08-23-2019 | 01:23 PM
#12
Registered
Joined: Jul 2007
Posts: 3,337
Likes: 860
I texted my tech for confirmation which pump is used as there was a different pump a while ago (probably output) but it's a carter and priced as a PCM
Until my tech gets back with the output specs on the new engines LP pump.. an old Nautique had a Carter P4389 with the Zinc coating (marine CG)
Found this link
RA080018 $150.00 FUEL PUMP ASSM - LOW PRESSURE - CARTER FUEL PUMP / PCM / Crusader Electric Fuel Pump, fits Crusader 5.7 Classic Series 1999-2005.
Until my tech gets back with the output specs on the new engines LP pump.. an old Nautique had a Carter P4389 with the Zinc coating (marine CG)
Found this link
RA080018 $150.00 FUEL PUMP ASSM - LOW PRESSURE - CARTER FUEL PUMP / PCM / Crusader Electric Fuel Pump, fits Crusader 5.7 Classic Series 1999-2005.
08-23-2019 | 01:31 PM
#13
Registered
Joined: Nov 2004
Posts: 14,154
Likes: 3,714
From: On A Dirt Floor
That maybe another (ie: one of a few) reason there set up works better than Merc's. They (Merc) don't seem to use an electric pump that is good at 'lifting.' Whereas, the Carter's are decent at 'lifting' the fuel.
It is very easy for a normal electric pump to create vapor lock on the 'suction' side since they like to cavitate when trying to pull fuel. Then add a 'anti siphon valve' that needs pretty strong 'suction' to open it, and wallah......add a little warm fuel and an easy to vapor lock one at that, and again, wallah.
It is very easy for a normal electric pump to create vapor lock on the 'suction' side since they like to cavitate when trying to pull fuel. Then add a 'anti siphon valve' that needs pretty strong 'suction' to open it, and wallah......add a little warm fuel and an easy to vapor lock one at that, and again, wallah.
08-23-2019 | 01:37 PM
#14
Registered
Joined: Jul 2007
Posts: 3,337
Likes: 860
My former tech got back to me... the carter pump/combo was used up until '06 and part of the retrofit kit due to the plumbing... the new FCC has the small lift pump on the side of the FCC (BUP's Pic)
The new gen of PCM's H5 and H6 (Gm small blocks) are running mechanical Direct injection pumps (1500psi) under the intake
The new gen of PCM's H5 and H6 (Gm small blocks) are running mechanical Direct injection pumps (1500psi) under the intake
Last edited by speicher lane; 08-23-2019 at 01:40 PM.
