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Quick tech question

Posted By: 87MO DAK

Quick tech question - 06/25/11 01:56 AM

Can the fuel pressure reg be mounted to the fire
wall,if using ST braided lines? I have seen many
car's & truck's done like so..The last time I went
through tech,the guy told me to change it ???
Posted By: MR_P_BODY

Re: Quick tech question - 06/25/11 02:00 AM

Quote:

Can the fuel pressure reg be mounted to the fire
wall,if using ST braided lines? I have seen many
car's & truck's done like so..The last time I went
through tech,the guy told me to change it ???



Should be 6" off the firewall
Posted By: 70AARcuda

Re: Quick tech question - 06/25/11 02:09 AM


as per nhra rulebook...

1:5 FUEL SYSTEMS
Location: All fuel tanks, lines, pumps, valves, etc. must be outside of the driver’s compartment and within the confines of the frame
and/or steel body. Cool cans, fuel-distribution blocks, etc. must be
located at least 6 inches forward of the flywheel/bellhousing area on
rear-wheel-drive (RWD) vehicles, and on opposite side of
flywheel/housing area on front-wheel-drive (FWD) vehicles. Fuel
pressure gauge isolators, with steel braided line, may be mounted
on firewall
Posted By: moparx

Re: Quick tech question - 06/25/11 02:11 AM

Quote:

Quote:

Can the fuel pressure reg be mounted to the fire
wall,if using ST braided lines? I have seen many
car's & truck's done like so..The last time I went
through tech,the guy told me to change it ???



Should be 6" off the firewall



i have often wondered why a firewall mount was prohibited. i would think if mounted on the inner fender, and a crash into the wall tore off the fender and inner structure, the firewall mount would be safer.
Posted By: MR_P_BODY

Re: Quick tech question - 06/25/11 02:22 AM

Quote:

Quote:

Quote:

Can the fuel pressure reg be mounted to the fire
wall,if using ST braided lines? I have seen many
car's & truck's done like so..The last time I went
through tech,the guy told me to change it ???



Should be 6" off the firewall



i have often wondered why a firewall mount was prohibited. i would think if mounted on the inner fender, and a crash into the wall tore off the fender and inner structure, the firewall mount would be safer.




Their main concern is a clutch or trans explosion
which could take it out
Posted By: Crizila

Re: Quick tech question - 06/25/11 02:23 AM

Quote:

Quote:

Quote:

Can the fuel pressure reg be mounted to the fire
wall,if using ST braided lines? I have seen many
car's & truck's done like so..The last time I went
through tech,the guy told me to change it ???



Should be 6" off the firewall



i have often wondered why a firewall mount was prohibited. i would think if mounted on the inner fender, and a crash into the wall tore off the fender and inner structure, the firewall mount would be safer.


They have issues with exploding clutches / convertors. I liked the fire wall too, but had to move mine to the inner fender well.

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Posted By: moparx

Re: Quick tech question - 06/25/11 02:28 AM

thanks guys. i never considered a clutch/converter failure affecting the main firewall structure... just the floorboard/tunnel area. my mistake.
Posted By: Crizila

Re: Quick tech question - 06/25/11 02:39 AM

Had a MAJOR clutch explosion in 65. Took out the brake line ( single master car - no brakes ), flattened the rt frt tire, took out the bell housing so the engine laid down on the center link. Fuel line stayed in tact. Time slip said 79 mph. Loooong shut down area and tall grass saved my fanny - shorts were a through-away
Posted By: 87MO DAK

Re: Quick tech question - 06/25/11 03:17 AM

Thanks ..was not sure ,with the braided line's.
That if it was the line's or the reg,crossing over the
bell housing.

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Posted By: cgall

Re: Quick tech question - 06/25/11 01:21 PM

Your fuel line must also be routed outside the frame rail, or be run through a length of pipe in the bellhousing area to shield it.
Posted By: Crizila

Re: Quick tech question - 06/25/11 02:49 PM

Quote:

Your fuel line must also be routed outside the frame rail, or be run through a length of pipe in the bellhousing area to shield it.

Don't think that is called for as long as it is a steel braided line.
Posted By: WILD BILL

Re: Quick tech question - 06/25/11 03:46 PM

Quote:

Quote:

Your fuel line must also be routed outside the frame rail, or be run through a length of pipe in the bell housing area to shield it.

Don't think that is called for as long as it is a steel braided line.



Correct. SS braided line would be fine in that area.

FWIW, my reg is mounted to my fender about 6"s forward of the firewall. The anal retentive tech insp said he felt it should be farther forward still as the forward edge of the bell housing was forward of the firewall and their fore my reg was within the 6" zone.


So, I've gotta move my reg forward about an inch.
Posted By: cgall

Re: Quick tech question - 06/25/11 04:16 PM

I haven't run any NHRA races since 2002, but back when I ran S/ST I had a braided fuel line on the motor side of the frame, NHRA tech at Indy said to move it or shield it. I cut a 2 ft. long piece of 1" conduit and slipped it over the line in the bellhousing area...passed tech. Maybe he was an over-aggressive type...
Posted By: 70AARcuda

Re: Quick tech question - 06/25/11 09:45 PM

Lines: All non-OEM fuel lines (including gauge and/or data
recorder lines) must be metallic, steel braided, or NHRA-accepted
“woven or woven-pushlock.” A maximum of 12 inches total (front to
rear) of non-metallic or non-steel braided hose is permitted for
connection purposes only; individual injector nozzle and motorcycle
fuel lines are excluded. Fuel lines (except steel braided lines) in the
flywheel/bellhousing area must be enclosed in a 16-inch length of
steel tubing, 1/8-inch-minimum wall thickness, securely mounted as
a protection against fuel-line rupture. Fuel lines may not be routed
in the driveshaft tunnel. It is mandatory that fuel lines passing
supercharger drive belts be steel braided, NHRA-accepted woven
or woven-pushlock, or be enclosed in protective steel tubing. A
current list of NHRA-accepted woven or woven-pushlock fuel lines
is available on NHRA.com. All NHRA-accepted fuel lines must use
ends that are specifically designed for the type of fuel line being
used. No hose clamps allowed on NHRA-accepted fuel lines.
Posted By: 87MO DAK

Re: Quick tech question - 06/25/11 11:34 PM

Thanks for the info
Posted By: 87MO DAK

Re: Quick tech question - 06/25/11 11:39 PM

Well that I have to change it .What about the reg
bracket that bolts on the carb flange stud's?
Just wondering ??? or other ways ?
Thank's mopart's.

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