Panty Soaker 5000 - C3 Stingray LS Swap Blower Build

[ckruzer]

Note
In the above turbo “room” pic
The stock return fuel line does *not* look like a 5/16 line. Looks like it is 1/4? Concerned with it managing enough volume

I’ll be running a surge tank. So the return to the gas tank will only be returning feeder pump flow

 

[orange150]

Note
In the above turbo “room” pic
The stock return fuel line does *not* look like a 5/16 line. Looks like it is 1/4? Concerned with it managing enough volume

I’ll be running a surge tank. So the return to the gas tank will only be returning feeder pump flow

I had to up my OE 1/4” return on my no frills AMC 360 per Edelbrock. I am not using their surge tank though and am returning straight to the tank from the fuel rail.

 

[ckruzer]

I had to up my OE 1/4” return on my no frills AMC 360 per Edelbrock. I am not using their surge tank though and am returning straight to the tank from the fuel rail.

I dont know enough science but this sounds like a math question
My feeder is a walbro 255. My lift pump from the surge is a helcat pump (check valve removed). My regulator is just a hunk of metal from holley i had laying around i got for free at some point (boost referenced)
The current stock fuel supply line is 3/8. the return appears 1/4.
The walbro operating at low pressure, I reckon i would have to look at the flow rates in 3/8 vs 1/4, and compare that to the walbro flow charts, and what percentage difference is - I know the standard is one size down for a return line
Probably would just make the most sense to use the stock oe 3/8 line as the return, and add a ptfe line 1/2in on the frame rail for the feed (then it would be sized for any future expansions lol

I did delete the charcoal cannister, but it is on the other side... that line is certainly in the 5/16-3/8 size going back to the tank (hard line) - however that would require the return crossing over to the other side, and would require dropping the tank because i doubt that that vapor line is just open ended on the tank, probably has a check valve in it or some other configuration. I know that when i reached up on the tank the charcoal cannister line has a few other lines going in it as well (vent tubes?), while the other side of the tank has the feed/return sender. I would need to get eyes on it to see if it is a standard hose barb fitting with a fuel/air separator, or if its built in.

If its not built in I imagine I could do the return down the opposite rail (or both?). I would just have to find a safe way to route the return line from the passenger engine bay side (where surge tank will be) to the drivers side. Im trying to avoid having any fuel line connections be *above* the turbo or hot side

In reflection - i do need to have some sort of vent somewhere.

 

[Bebop]

What are your power goals?
What pressure is your lift pump working at? (FYI : Lift pump goes from tank to surge and feed/pressure pump goes from surge to engine)
Start with that and we can trickle down from there.

But low pressure will need bigger lines, so I can tell you right now that 1/4 is not enough. 3/8 won't be either for a low pressure application.

 

[ckruzer]

What are your power goals?
What pressure is your lift pump working at? (FYI : Lift pump goes from tank to surge and feed/pressure pump goes from surge to engine)
Start with that and we can trickle down from there.

But low pressure will need bigger lines, so I can tell you right now that 1/4 is not enough. 3/8 won't be either for a low pressure application.

Initially 700 torque max. Because stock t56 and stock rear end. Ultimately 1000hp+ within the next 2yrs

Walbro 255 gravity fed from bottom of tank. Feed to engine bay surge. Walbro F90000285 "Hellcat" pump with the check valve removed which sells as the FF90000295, inside the surge tank.

 

[Monkeynono]

Bigger lines don't hurt at high power numbers. As stated above I would up the return size.

 

[ckruzer]

Bigger lines don't hurt at high power numbers. As stated above I would up the return size.

I agree. Im going to use the 3/8 OE hard feed line as the return, and run a 1/2in ptfe line as the feed ($$$)
OR
Im going to use the 3/8 OE hard as feed (let the 1/4 return lay dormant), and use the charcoal cannister 3/8 hard line as the return

My decisions are purposely being limited to options that do not require removing the tank! lmao

 

[Noel]

I run a 10 supply and 8 return

 

[Bebop]

Initially 700 torque max. Because stock t56 and stock rear end. Ultimately 1000hp+ within the next 2yrs

Walbro 255 gravity fed from bottom of tank. Feed to engine bay surge. Walbro F90000285 "Hellcat" pump with the check valve removed which sells as the FF90000295, inside the surge tank.

Walbro 525 on E60 (max you'll find at a pump) will definitely NOT supply enough for 700hp. Anything above 550hp under boost you need a dual/triple pump setup. Or a brushless unit.
You will need a bigger lift pump as well.

 

[ckruzer]

Walbro 525 on E60 (max you'll find at a pump) will definitely NOT supply enough for 700hp. Anything above 550hp under boost you need a dual/triple pump setup. Or a brushless unit.
You will need a bigger lift pump as well.

The 255 is the feeder to the surge. And is rated to 500hp boated on its own, 650 NA. The hellcat pump is in the surge and is 430lph rated at 800/1000 in the same

I’m never gunna see 700hp in town going to get a bagel on street tires.

A 500lph+ brushless is a discussion to be had 365 days from now when I say “I wanna go to the drag strip this summer”. Dual surge tank is another discussion after I’ve spent 15k beefing up the suspension, rear end and t56 because I wanna hit 1000+ hp

 

[Bebop]

The 255 is the feeder to the surge. And is rated to 500hp boated on its own, 650 NA. The hellcat pump is in the surge and is 430lph rated at 800/1000 in the same

I'm not trying to be difficult but just sharing data from past experiences.
A single Hellcat pump will most definitely not provide enough fuel for 800 hp on E.

A 500lph+ brushless is a discussion to be had 365 days from now when I say “I wanna go to the drag strip this summer”. Dual surge tank is another discussion after I’ve spent 15k beefing up the suspension, rear end and t56 because I wanna hit 1000+ hp

Single surge tank with 2 pumps is what I'm suggesting.
I agree with @Noel on the hose sizing for 1000+ power goals.

 

[ckruzer]

I'm not trying to be difficult but just sharing data from past experiences.
A single Hellcat pump will most definitely not provide enough fuel for 800 hp on E.


Single surge tank with 2 pumps is what I'm suggesting.
I agree with @Noel on the hose sizing for 1000+ power goals.

I appreciate that
Well I already have it so we will get to see the hard data on it for the record. It’s too late to return it and budget is thinning
Walbro spec page does rate it for 700hp boost, or 900hp NA. As 700hp is my stage one goal, thats why I chose it.

I wanted to do dual pump surge. That was the original plan. I couldn’t fit it. I ordered the smallest two pump on the market. Mocked it up and I would not have enough room for charge pipe. The only metal on this car is the frame - fiberglass body so my mounting ability is even more limited

The only place I have plenty of real estate is inside the front bumper. Which seems like a very bad idea for crash reasons.

I do recognize there will have to be a pump upgrade in the future. It would be cool if I find a single brushless at that time that is capable. For now will have to do the first burnout with the hellcat pump

I have decided to run a 10 ptfe line for supply and use the stock 3/8 line as the return.

EDIT: A future solution may require deleting the surge tank approach, and getting a custom fuel cell made to replace the stock tank and do a drop in dual or triple pwm controlled pumps. Many future options

 

[Bebop]

Keep it simple and swap in a bushless instead of your 525 later.
Brushless pumps will support 1500+ easily so you're totally good there.

I think the hose sizing idea you just shared is much better.

 

[ckruzer]

Pulled the steering column out. Which gained acces for clutch pedal to remove the rod. Then was finally able to remove charcoal canister bracket and washer pump bottle.

You can see in the image less room on brake booster side. So now I guess I’ll be doing the hydroboost now vs later. Notice the red area pointing to the protruding portion of the firewall (absent on pass side). This is where the wire harness enters the vehicle. My new harness will be relocated to the center firewall area. Once I get the brake booster off we will see how much less room is on this side. This will probably force me to mount them much higher

I’m noting I’ll need to rework that rear brake line to make more room for the 3in down pipe.

I also need to engineer a turbo brace to support the weight but which will also allow some flex as well. Otherwise I’ll have to look to see if a flex joint is allowed between the header and turbo

 

[Noel]

I appreciate that
Well I already have it so we will get to see the hard data on it for the record. It’s too late to return it and budget is thinning
Walbro spec page does rate it for 700hp boost, or 900hp NA. As 700hp is my stage one goal, thats why I chose it.

I wanted to do dual pump surge. That was the original plan. I couldn’t fit it. I ordered the smallest two pump on the market. Mocked it up and I would not have enough room for charge pipe. The only metal on this car is the frame - fiberglass body so my mounting ability is even more limited

The only place I have plenty of real estate is inside the front bumper. Which seems like a very bad idea for crash reasons.

I do recognize there will have to be a pump upgrade in the future. It would be cool if I find a single brushless at that time that is capable. For now will have to do the first burnout with the hellcat pump

I have decided to run a 10 ptfe line for supply and use the stock 3/8 line as the return.

EDIT: A future solution may require deleting the surge tank approach, and getting a custom fuel cell made to replace the stock tank and do a drop in dual or triple pwm controlled pumps. Many future options

View attachment 433799

Will support that on pump gas but as soon as you factor the corn in, you need double the pump. I personally refuse the e. I like to drive my stuff and don’t wanna be looking for a station that carries it. And at half the mileage

 

[Bebop]

Will support that on pump gas but as soon as you factor the corn in, you need double the pump. I personally refuse the e. I like to drive my stuff and don’t wanna be looking for a station that carries it. And at half the mileage

Hence the ethanol content sensor and the flex tune.
Best of both worlds.

But man, not getting 100+ extra hp because you want to run 93 only is missing out IMO.

 

[Noel]

Hence the ethanol content sensor and the flex tune.
Best of both worlds.

But man, not getting 100+ extra hp because you want to run 93 only is missing out IMO.

True, but I’m not planning my trips around gas stations. E fuel is scarce and isn’t getting any better. Most places around me have dropped it. Basically just some sheetz. The general public realized quick that saving 50 cent a gallon isn’t adding up against the fuel mileage. And gas stations aren’t gonna carry it. I understand its power and have had it before in a cobra

 

[Bebop]

Even my daily is flexfuel. Everything is open when you have that capability.
And a flex sensor is about $100/150 with the fittings.
It's the perfect time to implement it when you're plumbing/wiring the car.

 

[ckruzer]

Stripped the interior the rest of the way. Now time to apply some thermal barrier and sound mat. Then start running the new chassis harness and get some new battery cables done and definitely beef up the grounding points.

 

[ckruzer]

@Noel @Bebop

I think I spy an interior surge tank mounting location… It’d be in the same enclosed space as where I want to mount the fuse panel and where the battery is. So idk.

 

[Bebop]

My honest opinion is that you should stab battery and electrical in that hole.

I don't even think that a surge tank is needed for a driver/weekend racer.

 

[ckruzer]

My honest opinion is that you should stab battery and electrical in that hole.

Thats my plan if the wiring reaches. Its already stock location for batter. I plan on mounting the fuse panel in there. I do not think the holley ecu will reach tho, but thats fine.

I don't even think that a surge tank is needed for a driver/weekend racer.

There are multiple variables. I do not want the cost of the tank swap/build. It also will not remain a joy ride indefinitely. This is a build that will be punched out this summer. And that will be stage 1. Then we want to focus on a few other modifications we have in mind, and then he wants to then do a stage 2 project to upgrade the suspension to Ridetech, 9in ford rear, and chase sub 9 seconds at the drag strip (yes i know other mods will be required).

 

[Bebop]

Thats my plan if the wiring reaches. Its already stock location for batter. I plan on mounting the fuse panel in there. I do not think the holley ecu will reach tho, but thats fine.

Can always get a longer harness built for it.

There are multiple variables. I do not want the cost of the tank swap/build. It also will not remain a joy ride indefinitely. This is a build that will be punched out this summer. And that will be stage 1. Then we want to focus on a few other modifications we have in mind, and then he wants to then do a stage 2 project to upgrade the suspension to Ridetech, 9in ford rear, and chase sub 9 seconds at the drag strip (yes i know other mods will be required).

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