Possible Fuel setup Please advise

[HisandHerTurbo]

Well, it's finally time to upgrade. Here is what I am leaning towards for either my current 60trim @ 32psi OR a FP @ 40+psi either on E85. Give me thoughts or other (better) options.

Here's my Thoughts.

FROM: Single re-wired 255====== TO: Dual 255's with fullblown motor sports in tank kit
FROM: -6an feed/return====== TO: -8an feed/ -6an return
FROM: 950cc FIC's======== TO: either FIC BM1450cc or FIC 2150cc either of them with or without the EasyTune

Looking forward to input
TY
JOE

[TerryLiv]

You will push plenty of fuel through the stock feed line, but if operating the dual pumps at idle or lower boost you will overrun the stock return line, so either the larger return or a hobbs pressure switch set to start the second pump at ~23 psi boost.

What turbine housing are you using. If a Mitsu and A/R of 0.63, don't plan on running more than 30 PSI, without massive missing.

Terry

Well, it's finally time to upgrade. Here is what I am leaning towards for either my current 60trim @ 32psi OR a FP @ 40+psi either on E85. Give me thoughts or other (better) options.

Here's my Thoughts.

FROM: Single re-wired 255====== TO: Dual 255's with fullblown motor sports in tank kit
FROM: -6an feed/return====== TO: -8an feed/ -6an return
FROM: 950cc FIC's======== TO: either FIC BM1450cc or FIC 2150cc either of them with or without the EasyTune

Looking forward to input
TY
JOE

[HisandHerTurbo]

You will push plenty of fuel through the stock feed line, but if operating the dual pumps at idle or lower boost you will overrun the stock return line, so either the larger return or a hobbs pressure switch set to start the second pump at ~23 psi boost.

What turbine housing are you using. If a Mitsu and A/R of 0.63, don't plan on running more than 30 PSI, without massive missing.

Terry

I guess my post only made sense to me cause I know what I was thinking......... FROM is what I already have, I already have -6 feed and -6 return my thought was to upgrade the feed to -8. I am already running an AGP RS60 @ 32psi........ please explain more what you are talking about with the massive missing........ cause I did start to have a "missing" issue that I have been fighting for a year (before that, the same turbo was fine). But elaborate where that comes from.

TY
JOE

[TerryLiv]

I guess my post only made sense to me cause I know what I was thinking......... FROM is what I already have, I already have -6 feed and -6 return my thought was to upgrade the feed to -8. I am already running an AGP RS60 @ 32psi........ please explain more what you are talking about with the massive missing........ cause I did start to have a "missing" issue that I have been fighting for a year (before that, the same turbo was fine). But elaborate where that comes from.

TY
JOE

Sorry for my confusion about the before and after size of fuel lines. I am running two parallel 255's in the tank with stock feed and return lines and have measured the flow rate and found that they would provide much more flow than my 2.3L, with PTE 6162 turbo at 30 psi boost could handle using E-85. On Gas that would be much much more. My hot side A/R is 0.63 which I believe is the same as yours. Above 30 psi I get missing. I have done all the spark mods I know of and it still happens. At 35 PSI it is massive missing. At 32PSI it is "some" missing. If you drop your boost down to 30 or less psi I would guess you will remove the missing. Apparently 0.63 A/R is too small to run more boost without missing.

Regarding the fuel line flow capacity, your -6 should flow about 44% more than my stock (-5), but my stock feed already flows much more than my engine can use so why go bigger?

Terry

[HisandHerTurbo]

WOW, interesting. How are you running your 2 wallys? custom? dual hanger purchase? Cause I am looking into that instead of an external. Anyway, That is interesting that you say your dauls are fine going through the stock fuel lines, expecially with E-85. Can you see and/or log fuel pressure? I'm thinking in your case, you are exceeding your stock lines ability......... the way it was explained to me was, you maybe able to turn up the fuel pressure to "X" or even turn on the fuel pump and add boost (via boost pressure test) and still get "X" pressure reading, but the one thing that isn't in account is the fuel that will actually be being used. Anyway, if you did something waaaay more advanced then that, and know your lines can handle alot more, awesome, was just throwing that out there.

[TerryLiv]

My dual 255's are tied together with hose clamps. Outlets are stock 5/16 rubber tubing into a stainless steel Y connector inside the tank and then into the stock fuel line. Basically ~$50 of Y adapter tubing and hose clamps.

I am losing flow because of the stock lines, but the key is that I have way more flow than I need. I can't log pressure, but can measure flow at different fuel pressures. My method of measuring flow is very scientific. It is disconnect the output of the AFPR return line and connect up a line to a plastic gallon jug setting alongside the drivers side door. Adjust the fuel pressure to different levels while timing how long it takes to fill the jug to the calibrated 1 gallon line.

This provides flow rates at different pressures. Example:

Single 255 at 30 psi fuel pressure & 14 Volts, flows 284 Liters per hour.
At 60 psi fuel pressure & 14 Volts, flows 260 LPH.

Dual 255's at 30 PSI fuel pressure & 14 Volts, flows 505 LPH.
at 60 psi fuel pressure 14 volts, flows 437 LPH.

My home brewed fuel calculator says at 590 WHP it should require about 275 LPH of E-85. I have 437 available, so I am good to go.

Have fun,

Terry




WOW, interesting. How are you running your 2 wallys? custom? dual hanger purchase? Cause I am looking into that instead of an external. Anyway, That is interesting that you say your dauls are fine going through the stock fuel lines, expecially with E-85. Can you see and/or log fuel pressure? I'm thinking in your case, you are exceeding your stock lines ability......... the way it was explained to me was, you maybe able to turn up the fuel pressure to "X" or even turn on the fuel pump and add boost (via boost pressure test) and still get "X" pressure reading, but the one thing that isn't in account is the fuel that will actually be being used. Anyway, if you did something waaaay more advanced then that, and know your lines can handle alot more, awesome, was just throwing that out there.

[HisandHerTurbo]

Oh sweet good info! I think based on a lot of info, I won't go bigger with the lines and will either get 1650's or the 2150's. I will do a lil more research and see how "un-friendly" the 1650's are, with and without the easy-tune, cause 1650's with the easy tune is almost the same as 2150's without, and the 2150's are supposed to be very very very easy and stock like.

[HisandHerTurbo]

Well, after a lot of input and reading, I am *ONLY* adding a Bosch 044 inline and then using the 2150's both pieces are enroute!

[TerryLiv]

Joe,

To improve idle drivability, I have been running 30 psi of base fuel pressure which gives me about 62% IDC max with my 1650 Blue Max injectors. You may have read recently about a guy on another forum going with 25 PSI base fuel pressure to improve idle. I run 30 PSI boost, & E-85. This is at about 500 WHP.

This winter I have added a SMIM and FP 4R cams with Kiggly springs, so should use even more fuel.

If I ever get it back together.

Terry

[HisandHerTurbo]

Joe,

To improve idle drivability, I have been running 30 psi of base fuel pressure which gives me about 62% IDC max with my 1650 Blue Max injectors. You may have read recently about a guy on another forum going with 25 PSI base fuel pressure to improve idle. I run 30 PSI boost, & E-85. This is at about 500 WHP.

This winter I have added a SMIM and FP 4R cams with Kiggly springs, so should use even more fuel.

If I ever get it back together.

Terry

TY TY TY, for the heads up! I "supposedly" shouldn't have issues like the 1650's and such due to me going with the HIGH impeadance injectors! That is the main reason I went so big, 1650's would have been large enough, but "supposedly" the High Z 2150's act more like stock!!! Guess we will see.

TY
JOE

[scooby]

FWIW, I have BM1650's and no easy tune and have no part throttle or idle issues since upgrading to v3 and using the direct access tables to input the injector latencies from the spec sheet fic sent with them.

[HisandHerTurbo]

FWIW, I have BM1650's and no easy tune and have no part throttle or idle issues since upgrading to v3 and using the direct access tables to input the injector latencies from the spec sheet fic sent with them.

LOL, You are probably a lot smarter in the tuning then most then....... I'm seeing some people getting close to maxing out 1650's (or at least close to 90%) on E-85 at close to 40psi, so I will keep telling myself I did do the right thing in spending so much more.........lol, I have heard that from a couple that with V3 the larger inj are "friendlier" then they have been before.

TY
JOE