Advise needed for my fuel issue.

[4bangstang]

As you know I put the car on the dyno a few days ago and put down 255hp and 314tq. The problem is the VAF (dinosaur age maf) and 36 lb/hr injectors maxed out soon as the turbo began to spool around 3600 rpm. According to the rc engineering site I am making more than mathematically possible. On a dynojet I would have put down 285hp. Anyway this is what I have in mind:

255 lph walbro high pressure in-tank pump
255 BBK in-line hp pump
15 feet of -6 and -8 ss hose from summit
misc hose ends
55lb/hr low impedence injectors(already have them)
ford lightning MAF ~90mm
Wilson Racing MS2 for 1984-1994 Fords

This is going to cost ~$1100 but I should never run out of fuel again

Gimme your .02 Thanx

[tinkey61]

i am running the bbk intank and in line 255s along with 60lbs injectors and put down 430 to the wheels and had plenty of fuel at least until the sc belt broke because of clutch slippage. but that was my fault, new clutch not broke in. but i gotta go back when i get the miles on the clutch. i would go with a bigger injector. just my couple cents, oh and i am running factory fuel lines and fuel rails. i think i got around 800 in my fuel setup

[4bangstang]

Do you think two 255 lph pumps are overkill?

[tinkey61]

Do you think two 255 lph pumps are overkill?

i dont think so. i asked alot of members on here, and was recommended to run duel pumps. Billy(ncstangguy)and shawn(bizzaro) could tell you alot about the fuel setups. shawn just put my second pump on and he knew what i was running and said it would be enough.

[4bangstang]

Cool Thanx

[tinkey61]

no problem, good luck with your setup

[Stable]

As you know I put the car on the dyno a few days ago and put down 255hp and 314tq. The problem is the VAF (dinosaur age maf) and 36 lb/hr injectors maxed out soon as the turbo began to spool around 3600 rpm. According to the rc engineering site I am making more than mathematically possible. On a dynojet I would have put down 285hp. Anyway this is what I have in mind:

255 lph walbro high pressure in-tank pump
255 BBK in-line hp pump
15 feet of -6 and -8 ss hose from summit
misc hose ends
55lb/hr low impedence injectors(already have them)
ford lightning MAF ~90mm
Wilson Racing MS2 for 1984-1994 Fords

This is going to cost ~$1100 but I should never run out of fuel again

Gimme your .02 Thanx


4 55 lb injectors will only support about 300 crank hp at 55 psi

What is this "On a dynojet I would have put down 285hp."?

[4bangstang]

My friend has a 04' lightning and he dyno'd 396 on a dyno at horsepower solutions. His ford lightning forums told him he made more power than he should have. A few weeks later he went to a mustang dyno somewhere locally in Hampton Roads, va with nothing changed on his truck and made 360 hp.
I did some reading and a few different sites said the dynojet usually shows 10-12% more than a mustang dyno.

Ok maybe I won't put 285 on the dynojet but 268 may be more like it. My goal is still 300hp though.

This says a 5 % difference
http://g35driver.com/forums/engine-drivetrain-forced-induction/26743-mustang-vs-dynojet-good-read.html

Says 10-12%
http://www.ls1tech.com/forums/dynamometer-results-comparisons/1104001-mustang-dyno-vs-dyno-jet.html

As far as the injectors go I think I should be ok because 55#inj x 4 x .80 (duty cycle) / .60 (BSFC) = 293 hp but low impedence injectors can run at a higher duty cycle so at 82% duty cycle I should be right at 300hp.

With the h20/meth I should still run safe right?

Video shows 6% difference
http://www.youtube.com/watch?v=2GI77QHCNSE

Says 10%
http://www.z06vette.com/forums/f55/mustang-vs-dynojet-47063/

We may have different opinions but I still think it's interesting.

[Stable]

The only problem I have when people say this, is they do not take into account that there is more than one type of dynojet dyno, and more than one type of MD dyno...also...about the only way to do this is to use the SAE numbers....what everyone needs to remember is that a dyno is a tool to setup the cpu/carb in your car...the only true numbers that mean anything is A/F. Most of the time, I will not look at the HP/TQ numbers untill the A/F is in the correct range.

[4bangstang]

That's true. I just need to step up. I already have the 55's. That's why i plan on using them. Anything is better than what i have now.