Which Walbro?
09-28-2011, 04:51 PM
#5
Junior Member
Join Date: Oct 2009
Location: The Netherlands
Posts: 200
Total Cats: 1
If you have a feul returnline from the injectorrail you'll probably fload the FPR, raising the fuel pressure at idle. There is a Miata turbo Wiki that gives a guideline for the pump.
Here you go:
http://miataturbo.wikidot.com/fuel-pump
Here you go:
http://miataturbo.wikidot.com/fuel-pump
Reply
0
0
09-28-2011, 05:43 PM
#6
Supporting Vendor
iTrader: (33)
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
If you have a feul returnline from the injectorrail you'll probably fload the FPR, raising the fuel pressure at idle. There is a Miata turbo Wiki that gives a guideline for the pump.
Here you go:
http://miataturbo.wikidot.com/fuel-pump
Here you go:
http://miataturbo.wikidot.com/fuel-pump
Reply
0
0
10-06-2011, 04:31 AM
#15
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Simple math crew checking in:
ID1000cc injector @ 87% DC, ~14v, and 72.5psi (for example) flows ~1000cc/min.
Therefore 4 of these injectors is 4000cc/min.
1000cc per liter
60 minutes per hour
cc/min * 0.06 = liter/hour
4000cc/min = 240lph
A DW300 flows ~255lph at 72psi.
A while ago, I used Injector Dynamics' online calculator to get some basic horsepower capabilities for ID1000s at various fuel pressures. ID1000s at 70psi will support ~750bhp on gasoline at 70psi, or ~550bhp on E85.
Since the DW300 will flow enough fuel to support the flow capacity of the injectors, we can therefore say that a single in-tank Deatschwerks DW300 fuel pump will support 650+whp on gasoline.
Someday I will decide to crack 500whp on E85. Probably not with the 2871R, but as soon as I can actually get my hands on a twin-scroll BW 7064 .92a/r I'll switch over and see what that turbo will do at high boost. Since 240lph is a safe number for 400whp, 25% more fuel is 320lph. The DW300 will clear 325lph, but only at 30psi, so I'll use a DW300 in the tank and an external Bosch 044 to knock the fuel pressure up to ~90psi. This is the smart way to do a big power fuel system, since the track crew knows the importance of having the OEM fuel sock in the OEM location in the tank.
ID1000cc injector @ 87% DC, ~14v, and 72.5psi (for example) flows ~1000cc/min.
Therefore 4 of these injectors is 4000cc/min.
1000cc per liter
60 minutes per hour
cc/min * 0.06 = liter/hour
4000cc/min = 240lph
A DW300 flows ~255lph at 72psi.
A while ago, I used Injector Dynamics' online calculator to get some basic horsepower capabilities for ID1000s at various fuel pressures. ID1000s at 70psi will support ~750bhp on gasoline at 70psi, or ~550bhp on E85.
Since the DW300 will flow enough fuel to support the flow capacity of the injectors, we can therefore say that a single in-tank Deatschwerks DW300 fuel pump will support 650+whp on gasoline.
Someday I will decide to crack 500whp on E85. Probably not with the 2871R, but as soon as I can actually get my hands on a twin-scroll BW 7064 .92a/r I'll switch over and see what that turbo will do at high boost. Since 240lph is a safe number for 400whp, 25% more fuel is 320lph. The DW300 will clear 325lph, but only at 30psi, so I'll use a DW300 in the tank and an external Bosch 044 to knock the fuel pressure up to ~90psi. This is the smart way to do a big power fuel system, since the track crew knows the importance of having the OEM fuel sock in the OEM location in the tank.
Last edited by Savington; 10-06-2011 at 05:03 AM.
Reply
0
0
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
