I used a Bosch 044 pump for 500 whp on 1000's on E85
they were 95% IDC but the car ran 8 track events like that on a red
not one single issue

 

What about the 1300s?

 

Stock is no slouch at all. It is possible to make 500 whp on the stocker but pretty maxed out.

 

easy as well

 

HB. Just curious how many FP Blacks you have tuned recently? And what kind of power did they put down?

I saw one thread on here where the guy made 430+ on 91. Were there any others?

 

wow, those must be some powerful stockers. do you care to share your math? becasue my math goes something like this.

575(bhp, to make close to 500whp) X .65 (gasoline BSFC on turbo 91oct, conservative number)=373 lbs/hr of fuel required.

373 % 4 = 93lbs/hr per injector

93 % .85 (IDC duty cycle safety margin) = 109 lbs/hr per injector or about 1150 cc per injector

109 x 4 injectors = 436 lbs/hr of fuel required

436 % 6 ( density of gasoline in gallons ) = 73 gal/hr

73 X 3.8 (to get lph) = 276lph

So our pumps are that good huh

 

Hrmmm.
Fp Green here on 93, DW800s, 26psi. Stock FPR, stock fuel pump.
My tune was leaning out at 7000rpm+ with IDC 90%
tried adding fuel, IDC up to 96% but my AFRs weren't coming down significantly, so i figured i was out of fuel pump?
Or am i out of injector and raising IDC/richening up the tune, isn't going to help me

 

I'm still not clear on the IDC reading you see in EvoScan. I've heard conflicting reports of it reading over 100%, meaning that at 90-96% you're not actually maxing out the injectors.

But an actual IDC of 90-96% is very close to static flow, so you're not going to really see more fuel once you reach 100% IDC.

You might be running out of pump, hard to say.

 

By your math even a Walbro woudn't be able to make 500 WHP which it clearly is able to by a myriad of dyno charts posted.

 

Based upon my buddies (criptballer's) math, this IS possible. Only by running the injectors at a less stable IDC.. Which is NOT recommend obviously..
Lets see what happens if we ran 93% IDC given the math below.

575 X .65 =373 lbs/hr of fuel required.

373 % 4 = 93lbs/hr per injector

93 % .93 = 100 lbs/hr per injector

100 x 4 injectors = 400 lbs/hr of fuel required

400 % 6 ( density of gasoline in gallons ) = About 67 gal/hr

67 X 3.8 (to get lph) = 254lph

The walbro 255 is obviously maxing out on that power.. As well as the injectors. Is it worth running a minimal fuel setup this aggressive? I guess that all depends on how desperately determined you are to accomplish your bad *** goal of 500 whp.

 

You can probably turn the base pressure up high enough if you are using a Bosch 44 pump to make the DW 1000's effectively 1300cc. I would imagine a Bosch 44 on the stock fuel pressure regulator would probably do the same thing. I have a hard time getting my rail pressure below 55-60 psi at idle with my Bosch 44 with an adjustable fpr.

 

Did you port the fuel pump housing or are you running the 044 inline after the stock unit?

 

I'm using the Bosch in line after a surge tank that is fed by the stock pump. It is not fed at stock pump output pressure since the surge tank has an overflow back to the fuel tank. There is some pressure in the surge tank normally, but it is very low.

 

just like octane blue proved with my math, this can be accomplishes with higher IDCs. in the dyno plots showing 500whp on a single walbro and dw1000s i bet you most of them will have very high IDCs. just like i do at 92% IDC and those power levels.

 

That's odd. I had that with the stock fpr but the afpr handles it just fine. I have it adjusted for 43psi at idle (with the hose attached).

I've heard from multiple local tuners that it reads to 120. Going to 100 isn't a problem.