RE: IML: Rubber fuel line question..

["Dick Benjamin" <dickb@xxxxxxxxx>]

SAE30R9 is the current spec for fuel hose.  This is not high pressure hose,
it is low pressure hose, but as you realize the EFI cars have only 13 PSI
from the tank to the engine, so this is OK with the 30R9 hose.  The reason
for updating from earlier hose (especially earlier than 30R7!) is because of
the current additive in gasoline which attack the older hose.  If your car
has not been updated in the last 7 or 8 years, you have 30R5 or even lower
hose, and that cannot tolerate the modern fuels.  30R7 seems to be holding
up OK in my cars, but I am replacing it with 30R9 as I get around to it.  I
have so many cars that it will take me a while to get to them all, but I am
very alert to any smell of fuel leakage.

Many parts stores are STILL using up their old supply of SAE30R7 - you have
to insist on the later stuff!

Yes, 30R9 is expensive, but it's a lot cheaper than replacing the car due to
a fire!

Dick

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Rob P
Sent: Thursday, August 04, 2005 9:08 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: IML: Rubber fuel line question..

I've been systematically replacing the rubber fuel line on my '82.  I 
understand that new formula hose is required to last with modern/oxygenated 
fuels.  I am wondering exactly what hose rating is required? I believe Dick 
B. said 309R or something like that which is efi hose going for 7.99 for 18"

<gasp> Regular hose (I believe it is 307R) is $1.25 per foot.  I understand 
the car is injected, but the rear pump is low pressure so I am not sure if 
the injected hose is required prior to the control pump.  I don't want to 
skimp, but this is a cheap driver and I don't want to throw money at it 
unless I have to.

On a separate note: the NHRA specifies no more than 12" of rubber hose on 
any vehicle.  I did about that much (plus 12 hose clamps) just changing the 
fuel filters!  There has got to be a better way.

Rob




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