Cory S
Well-Known Member
- Joined
- Dec 10, 2019
- Threads
- 47
- Messages
- 3,355
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- 3,702
- Location
- Bradford, NH
- First Name
- Cory
- Vehicle(s)
- 2016 Mustang GT Premium
- Thread starter
- #1
Factory pump died last week. 18V BAP probably took some life out of it. Wanted to try a DW 400 and see if it would feed 700+whp without a BAP. It sure did. Lambda/STFT’s looking great all the way up to 7800rpm.
I did remove the Anti-drainback check valve out of the top DW 400, because it closed up the outlet opening to a SMALLER than the factory pump outlet opening. I really think their “retrofitted” design would easily cause a solid 10-15% reduction in flow. I do get longer cranks without the check valve, but I know I’m getting maximum capability from the pump. I may add a high flow in-line check valve to try out in the near future.
I’ve attached a picture of the size of the yellow plastic ring that sits inside the outlet of the DW 400 outlet, and put it on top of the factory outlet to show how much of a bottleneck it creates.
I did remove the Anti-drainback check valve out of the top DW 400, because it closed up the outlet opening to a SMALLER than the factory pump outlet opening. I really think their “retrofitted” design would easily cause a solid 10-15% reduction in flow. I do get longer cranks without the check valve, but I know I’m getting maximum capability from the pump. I may add a high flow in-line check valve to try out in the near future.
I’ve attached a picture of the size of the yellow plastic ring that sits inside the outlet of the DW 400 outlet, and put it on top of the factory outlet to show how much of a bottleneck it creates.
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