Do I need to replace the rubber fuel lines?

blueroo

Well-known member
I was surfing the web and I was on the ultimategto website (it may be sinful but my ultimate dream car is a 1969 GTO) and on their weekly poll it said something about the original rubber lines being incompatible with modern fuel. is that true?
 
Fuel line is relatively inexpensive, so when in doubt, change it.
 
i have a rubber hose connecting my second fuel filter to original lines...works fine. Just keep an eye on it
 
8) fuel line designed in the 60's and 70' was not designed to handle the additives that are used in fuel today. the rate of deterioration though will vary depending on how long the fuel sits in the line without moving. if oyu are using the car as a daily driver, and there are no leaks, i wouldnt worry about it. but if the car sits without moving for long periods of time, i would replace the lines.
 
If the hoses are over 4 years old, replace them.

Maybe I go to the extreme, but if the hose is on the vacuum side of the fuel pumps I often use the expensive fuel injection hose which will withstand 35# pressure. Why I do that is to prevent a line collapsing under a sucking or a vacuum condition. Maybe not necessary but just as a precaution. The pressure side just requires regular fuel hose. However the fuel injection hose is a real safety precaution.

Never be afraid to replace old fuel hoses, the old hoses could cause a fire which could destroy your ride. William
 
Ok, I think I'm going to replace the lines and this brings up another thing. I want to add a fuel pressure gauge on the fuel line. What will it take to add one as I've heard they need to be on a non-flexing line?
 
No, they'll go anywhere. Summit sell a brass gauge splicer which has two 3/8" hose barb ends and in the middle, a female 1/8NPT thread for a gauge. Used with their liquid-filled gauge, this is cheap but handy information under the "lid". You will need to upsize your fuel line in this section, as standard for the sixes was 5/16 ID.
 
I'm glad you decided to change.

I looked at your location, cute. But it didn't help me to answer your question. Up here in ND and MN we have ethanol mixed gas along with all the other additives in the gasoline. ND is 10% ethanol & 90% gas. MN is 15% ethanol. That will melt your old rubber gas line in a hurry.

Be certain to do the hose between the frame and the fuel pump. While you are there, it is really SMART to add an in-line filter between the frame and the fuel pump to protect the pump from gas tank crud.

Good Luck
 
Dennis, what kind of power increase or decrease do you expect from your local fuel blends??

I looked at your location, cute. But it didn't help me to answer your question. Up here in ND and MN we have ethanol mixed gas along with all the other additives in the gasoline. ND is 10% ethanol & 90% gas. MN is 15% ethanol.

Just wondered being from south carolina I don't think we have your midwest blends. William
 
wsa111":mloz46xj said:
Dennis, what kind of power increase or decrease do you expect from your local fuel blends??

If you jet just a tiny bit richer you might see a little power increase.

The big thing on the turbomustangs board is E85 (85% ethanol/15% gasoline) It's only $2.00 a gallon and some guys are making 1000 HP on it.
 
I know methanol can be blended with nitromethane without a blending agent. With gasoilne you need to use toluene to blend nitro with gasoline.

Never heard of the E85 blend living on the east coast. If its 85% ethanol I guess you could blend a 20-25 % of nitromethane into the fuel blend for just racing or just to get super performance.

Yes you would have jet richer to prevent frying a piston.

Nitromethane @ methanol can be very corrosive to all fuel system componets.

Holley has special accerator pump diaphrams just for non gasoline users.

This is getting off the original post, but fuel blending can be a real power boost.

A warning this fuel is very corrosive to all parts of you fuel system, if you use it drain it as soon as you are done racing it. William
 
wsa111":2ud58vce said:
With gasoline you need to use tylenol to blend nitro with gasoline.

I use ibuprofen myself. :lol: :wink:

Did you mean Toluene or Toluol?
 
Let use Toluene as the blending agent. Thats less painfull. William
 
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