E85 fuel lines?

[YEEE85]

Im planning to run E85 in my '85 GN with ported iron heads and Work 5857 turbo and ported intake, 3" DP, 3" single shot exhaust and of course all other supporting mods-
Will the stock fuel lines be good enough for the increase in required fuel volume?

 

[Chuck Leeper]

Im planning to run E85 in my '85 GN with ported iron heads and Work 5857 turbo and ported intake, 3" DP, 3" single shot exhaust and of course all other supporting mods-
Will the stock fuel lines be good enough for the increase in required fuel volume?

No.
PTFE is the most logical choice.
Not cheap, but very reliable.

 

[YEEE85]

No.
PTFE is the most logical choice.
Not cheap, but very reliable.

I'm more concerned with the size of the lines- are stock lines fat enough?

 

[BEATAV8]

The stock return line can really get in the way. It can cause fuel pressure to be excessively high when you need it to be low (at idle / decel).

Best route is to go with larger lines, -8 supply and -6 return. The racetronix line & filter kit is popular. Their hellcat pump setup with wiring will also do the job well into the 10's or even better. Full throttle speed carries this stuff, or go to racetronix site.

 

[Chuck Leeper]

I'm more concerned with the size of the lines- are stock lines fat enough?

E85 requires 30% more flow.
The return line is the more restrictive. The connections at the ft of the frame are also restrictive as they're a "Saginaw design" with o'rings.
Obviously, the more power, the closer to running out of flow.
Your choice... Try it with what you have.

 

[Mr.Spool]

In addition to the above
I would seriously consider doing the ptfe lines and rail.
The stock lines and rails are very old and I've seen them in bad shape on the inside
I would flush them and flow injectors and see what's going before you try to use them.

 

['87 Turbo "T"]

I agree with all that has been said above.
Went to 85 myself a few years back, & went with the Cruz set-up. -6 & -8 lines filter included. Plus filter is cleanable according to Don.
Ran over axle, along DS frame rail, & up to motor.

 

[Mr.Spool]

Hope all realize that these cars are very old now and trying to introduce alcohol based fuels han speed up the failure

 

[Mr.Spool]

Im planning to run E85 in my '85 GN with ported iron heads and Work 5857 turbo and ported intake, 3" DP, 3" single shot exhaust and of course all other supporting mods-
Will the stock fuel lines be good enough for the increase in required fuel volume?

You should look into putting alky injection on the car
It's a separate fuel system and running a 58mm turbo on a single nozzle is very simple

 

['87 Turbo "T"]

Hope all realize that these cars are very old now and trying to introduce alcohol based fuels han speed up the failure

I don’t disagree. That being said, I did my homework for my situation.
I ran ALKY for a bit. Didn’t hate it, didn’t love it. More wiring, underhood plumbing, pump rebuilds, yada yada.

For me, we have E85 at the pumps locally(I have a tester to check the content). So that means not having to worry about pumps, finding methanol, & the other things ALKY entails.

I planned accordingly for a fuel pump that is sized correctly, works with E85, & I’ll change it out every few years. I switched over to -6 & -8 lines. Kept the stock lines & capped them. Injectors are sized to work with E85 & my build.

A bit more work upfront sure but now I can go & just get 85 at the pump & go about my business. No worries about constantly filling up ALKY, pumps, etc. Not to mention gotta love the octane content of 85 & its knock resistance.

That’s just my preference though .

 

[Mr.Spool]

I don’t disagree. That being said, I did my homework for my situation.
I ran ALKY for a bit. Didn’t hate it, didn’t love it. More wiring, underhood plumbing, pump rebuilds, yada yada.

For me, we have E85 at the pumps locally(I have a tester to check the content). So that means not having to worry about pumps, finding methanol, & the other things ALKY entails.

I planned accordingly for a fuel pump that is sized correctly, works with E85, & I’ll change it out every few years. I switched over to -6 & -8 lines. Kept the stock lines & capped them. Injectors are sized to work with E85 & my build.

A bit more work upfront sure but now I can go & just get 85 at the pump & go about my business. No worries about constantly filling up ALKY, pumps, etc. Not to mention gotta love the octane content of 85 & its knock resistance.

That’s just my preference though .

Just some food for thought
Julio has new pumps that apparently you don't have to keep up on nearly as much.so matinence is down.
from what I has seen these intank pumps that guys are excited about although rated for e85 degrade and fall off and inmo a person is dealing with a similar situation where the pumps will have to come out and be monitored.
It's also quite costly when real numbers apply and they still don't work well in the high psi situations/meaning they are falling off in flow when psi is going 80+.
I went with aeromotive brushless spur pumps on my cars and they have been fantastic and I I've never felt like my fuel system has been so strong.
With a the new computers and boost control systems this makes things more noticeable but for a stock ecm car it can be disastrous.
As far as knock suppression
Well on a 58mm turbo combo that can be maxed out on pump gas alky and e85 safely with the right tune up.
Definitely things can be done differently it's all about budget and willingness.

 

[Mr.Spool]

When I switched personally
I built my own ptfe fuel lines,went with an external aeromotive vari speed brushless spur pump,new rails,new injectors fuel cell along with the various other things that come along with the switch.
It's nice to get e85 at the pump for sure!
But I also run Alkycontrol on top of that.

 

[Chuck Leeper]

But I also run Alkycontrol on top of that.

>50 #s of boost will do that!

 

[Mr.Spool]

>50 #s of boost will do that!

Stop
You make me sound like a boost addict

 

[Mr.Spool]

Ok fine
I am

 

[MikeS]

I ran e85 using stock lines with the Saginaw fittings removed. Vent & return were switched. Walbro 450 and 80lb injectors. I had no fuel issues running a Te44 for all it was worth. It isn’t the best way, but it can be done.