Questions about converting to E85

[1984 t-type]

I'm working on a 109 swap for my hot air car and just started reading up on the E85. Regardless of if I run E85 or 93 with alky my plans were to get a new walboro single pump with Hotwire kit, new injectors 60's or 80's with matching chip, and adjustable fpr. Still undecided on what turbo and stall I will go with but my goals for the car are to be 95% street driven but still be able to run low 11's at the track a couple times a year. Should I look into E85 or just run 93 and alky ? E85 is readily available in my area. Also would I need to change anything other than what I already plan on ? Thanks

 

[MikeL.]

80's minimum...bigger if possible if on e85. Are you going to use the stock fuel lines?

 

[1984 t-type]

yes was planning on using stock lines unless I see any damage to them, have not inspected them yet I just know they don't leak. Will stock lines, a walbro 340 or 416, and 80# injectors be a good enough fuel system to support low 11's and possibly high 10's on E85 ? not really wanting to go bigger than 80's

 

[Howling Mad]

I think the 416 would be too much for stock lines

 

[1984 t-type]

so would a walbro 340 be enough for what im trying to do ?

 

[MikeL.]

A single 340 on e85 will not hit 10's on stock lines. Dual 340's will do it but you might be injector limited at 80's assuming the same goal of 10.99 or faster.

My setup is -8 feed, -6 return racetronix dp feeding 120's.

 

[turbo89]

A single 340 on e85 will not hit 10's on stock lines. Dual 340's will do it but you might be injector limited at 80's assuming the same goal of 10.99 or faster.

My setup is -8 feed, -6 return racetronix dp feeding 120's.

I cant comment on the walbro 340 as I stopped using walbro pumps long ago ... personally I avoid walbro's .. especially on E85

But with a DW300 pump and 80's there are a lot of cars running in the 10's .. for what he wants to do .. single DW300 and 80's will be just fine

 

[Racetronix]

We recommend our FPS-G7W416EAN, FPWH-006 and one of our fuel line kits as a complete E85 compatible fuel solution. These components will provide maximum performance with E85 and eliminate any possible problems by maintaining use of the factory components.

 

[MNwe4]

We recommend our FPS-G7W416EAN, FPWH-006 and one of our fuel line kits as a complete E85 compatible fuel solution. These components will provide maximum performance with E85 and eliminate any possible problems by maintaining use of the factory components.

I'm doing something very similar to the OP with the goal of also running consistent low 11's and sometimes high 10's. Running e85 and 80lb injectors with a not to be named 340 pump I did have to add the -6 return line. The pump just crapped out on me so I'm looking for something different. Racetronix, can you please confirm/deny that the Walbro 430 lph pump will fully support the 80lb injectors at 13.5 volts? If the 80lb injectors can't get me to 10's, so be it, I just want to make sure I have a pump that can fully support them. The plan is to add a -8 feed line. Very much looking forward to the response!

 

[1984 t-type]

Just out of curiosity and because I'm thinking about doing it, why didn't you just run a new feed line and use the old feed line as your new return ? Would that work ?

 

[turbo89]

I'm doing something very similar to the OP with the goal of also running consistent low 11's and sometimes high 10's. Running e85 and 80lb injectors with a not to be named 340 pump I did have to add the -6 return line. The pump just crapped out on me so I'm looking for something different. Racetronix, can you please confirm/deny that the Walbro 430 lph pump will fully support the 80lb injectors at 13.5 volts? If the 80lb injectors can't get me to 10's, so be it, I just want to make sure I have a pump that can fully support them. The plan is to add a -8 feed line. Very much looking forward to the response!

IF you cant get 80's into the 10's .. you have something going on delivery wise .. you need to figure that out.. 80's are more than capable of supporting 10's ... or are you trying to do it running 11 volts at the pump and 40 psi of fuel pressure ?

 

[MNwe4]

Just out of curiosity and because I'm thinking about doing it, why didn't you just run a new feed line and use the old feed line as your new return ? Would that work ?

Not really a huge reason, but I think most of it had to do with that I didn't want to mess with a new filter setup and a lot of other people were just putting on a -6 return with good results. It's very possible that the setup was just fine for what I wanted to do, but since the pump has to be replaced I'm willing to spend the extra money now if the pump/hanger combo Racetronix posted will offer a larger margin of safety.

 

[MNwe4]

IF you cant get 80's into the 10's .. you have something going on delivery wise .. you need to figure that out.. 80's are more than capable of supporting 10's ... or are you trying to do it running 11 volts at the pump and 40 psi of fuel pressure ?

It's a fresh build so I have no idea what it's going to be capable of, but based on other's posts I would agree with you. Idle setting was 43 psi line off with full alt voltage verified at the tank, hotwire kit with volt booster.

 

[1984 t-type]

Keep hearing about volt boosters do they increase voltage across the board or just to the fuel pump ? And how many volts is too much for the pump and other accessories , I have to assume they are tested and rated for a certain voltage, could this cause problems down the line ?

 

[turbo89]

It's a fresh build so I have no idea what it's going to be capable of, but based on other's posts I would agree with you. Idle setting was 43 psi line off with full alt voltage verified at the tank, hotwire kit with volt booster.

Don't be afraid to run a bit higher pressure... If they are siemens 80's they will have no issues running in the 75-80 psi range A WOT / full boost .. @ that pressure they are essentially a 100lb/hr injector

They should work very well for your goal

 

[MNwe4]

There are two types of volt boosters out there, the ones that add like 2 volts to the entire system once you reach a certain throttle percentage (or psi) and ones that just send more voltage to the fuel pump once you reach a certain psi. Two examples that come to mind are the Caspers volt booster and the Kenne Bell boost a pump. I've had both types and they both functioned as advertised. Let's save that topic for a different thread or just search for one of the many that are out there.

So, is this Racetronix kit with the 430 lph pump the largest single pump that will fit in the stock tank? Recent searching would lead me to think yes... Been trying to find data with this directly compared to the dw300 and the aeromotive 340.

 

[turbo89]

There are two types of volt boosters out there, the ones that add like 2 volts to the entire system once you reach a certain throttle percentage (or psi) and ones that just send more voltage to the fuel pump once you reach a certain psi. Two examples that come to mind are the Caspers volt booster and the Kenne Bell boost a pump. I've had both types and they both functioned as advertised. Let's save that topic for a different thread or just search for one of the many that are out there.

So, is this Racetronix kit with the 430 lph pump the largest single pump that will fit in the stock tank? Recent searching would lead me to think yes... Been trying to find data with this directly compared to the dw300 and the aeromotive 340.

Ask yourself this .. your trying to run hi 10s ... 550 hp should get you there ( 300 lph covers this and then some) and its a drop in with no other mods needed.

a 430 lph pump will probably cover 750 hp ... fuel it with a pump and injectors and it will easily make enough power to spit the crank out ..

Now if you have the motor fortified / large enough turbo ... and already have the return line upgraded go with the bigger pump and run a bigger feed ... as at that point hi 10's would be cake walk and your going to turn it up even more. ( at 10.70 or so.. you start to hurt the car.. that's why most guys stop at hi 10's)

 

[MNwe4]

It's a pretty stout build and more fuel system can only help. I am committed to sticking with 80's and an intank pump though. Not to mention that the car drives great on the stock ecm and a turbotweak chip.