[danhr]

Originally Posted by jamessh10

The end goal is 1000-1100

If you want 1000 - 1100 WITHOUT meth, you should NOT be buying lt4 stuff.

Either stay DI and get a set of lingenfelter or FIC injectors, and the big bore pump

Or go port injection, which will retain lt1 stuff

Either one will need at least a fore innovations double pump or triple pump setuo..... dont even bother with an aux kit for that imo.

[Joshinator99]

Originally Posted by danhr

Why would you expect more out of the dw400? Correct me if I'm wrong, but it flows less than the lt4 in tank pump.

No, the LT4 definitely flows less. The DW400 should crush it according to the chart I posted above.

[danhr]

Originally Posted by Joshinator99

No, the LT4 definitely flows less. The DW400 should crush it according to the chart I posted above.

Ummmm parish flowed his lt4 pump at 456 lph @ 30 psi.

Per dw's chart, dw400 flows 445 lph @ 30 psi.

[Joshinator99]

Originally Posted by danhr

Ummmm parish flowed his lt4 pump at 456 lph @ 30 psi.

Per dw's chart, dw400 flows 445 lph @ 30 psi.

According to the chart I posted earlier in this thread, the DW400 can do 560 lph @ *40* psi with 17.5 volts in. So it appeared to be a nice upgrade over the LT4, but still not enough for my combo.

[danhr]

Originally Posted by Joshinator99

According to the chart I posted earlier in this thread, the DW400 can do 560 lph @ *40* psi with 17.5 volts in. So it appeared to be a nice upgrade over the LT4, but still not enough for my combo.

Yeah I was keeping the numbers the same from each test, to make it an apples to apples comparison. Parish did his test at 30 psi, since that's really all that's needed to supply the high side, so I compared it with the 30 psi numbers from the dw400 chart.

And I was comparing 14.5 volts from one pump to 14.5 volts to another pump. Correct me if I'm wrong, but the factory FSCM does not have a built in step up transformer and cannot put out more than 14.5 volts.

[scantone]

Originally Posted by danhr

Yeah I was keeping the numbers the same from each test, to make it an apples to apples comparison. Parish did his test at 30 psi, since that's really all that's needed to supply the high side, so I compared it with the 30 psi numbers from the dw400 chart.

And I was comparing 14.5 volts from one pump to 14.5 volts to another pump. Correct me if I'm wrong, but the factory FSCM does not have a built in step up transformer and cannot put out more than 14.5 volts.

These cars run at 70 plus psi, 30psi doesn't mean much. Think you can get around 16 volts out of the fpcm.

[danhr]

Originally Posted by scantone

These cars run at 70 plus psi, 30psi doesn't mean much. Think you can get around 16 volts out of the fpcm.

Low side is just supplying pressure to the high side. It isnt supplying pressure to the motor. The high side does. Like a lift pump on a diesel

I've gone as low as 40 psi on my low side and my pulse width was still below 6.0 ms.

Charging system has a max voltage of 14.8 volts. You cant get any higher than that without a dc step up transformer (i.e. a bap)

[Joshinator99]

Originally Posted by danhr

Yeah I was keeping the numbers the same from each test, to make it an apples to apples comparison. Parish did his test at 30 psi, since that's really all that's needed to supply the high side, so I compared it with the 30 psi numbers from the dw400 chart.

And I was comparing 14.5 volts from one pump to 14.5 volts to another pump. Correct me if I'm wrong, but the factory FSCM does not have a built in step up transformer and cannot put out more than 14.5 volts.

Totally understand where you’re coming from. One of the attractions to the DW400 was it scaled up nicely in linear fashion with the BAP where many pumps don’t. I probably shouldn’t complain, I was able to get 99 lbs/min fueled on 93 octane before it was dropping off some in a 94 degree dyno room (still 40 psi though). Not sure where the LT4 in-tank runs out of steam in that scenario. But I’m still under pulled for my combo (only 13 psi) and need to add E for sure, so triple pump time no matter how I slice it.

[jamessh10]

Originally Posted by Pendelton

Crawford racing harbor system. And leave the stock in place.

6k geeeez.
Thinking about just getting a double intank. Lpe hpfp and 30% injectors. Would i have enough for e80