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Modifying a std fuel regulator for boost reference #2879243
01/24/21 09:35 AM
01/24/21 09:35 AM
Joined: Jan 2003
Posts: 2,915
A shed in England
Tig Offline OP
master
Tig  Offline OP
master

Joined: Jan 2003
Posts: 2,915
A shed in England
Hi.
Anyone modified a std regulator for boost reference by tapping a hole in the housing above the diaphragm for a small push on fitting ?
Would it work?
Edit: A bit more info, it's a Aeromotive P/N 13208: Pro-Stock, 4-Port Regulator. It has small hole above the diaphragm in the top housing. I'm guessing it's for referencing to atmosphere so that's where I'm thinking of tapping it.
TIA.

Last edited by Tig; 01/24/21 09:47 AM. Reason: A bit more info.

'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Modifying a std fuel regulator for boost reference [Re: Tig] #2879246
01/24/21 09:46 AM
01/24/21 09:46 AM
Joined: Jan 2003
Posts: 8,021
Tulsa OK
Bad340fish Offline
master
Bad340fish  Offline
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Joined: Jan 2003
Posts: 8,021
Tulsa OK
I don't see any reason that wouldn't work. A friend did the same thing to a mechanical fuel pump when adding boost and it worked just fine.


68 Barracuda Formula S 340
Re: Modifying a std fuel regulator for boost reference [Re: Tig] #2879268
01/24/21 11:02 AM
01/24/21 11:02 AM
Joined: Nov 2013
Posts: 695
Southern Alberta
Uberpube Offline
mopar
Uberpube  Offline
mopar

Joined: Nov 2013
Posts: 695
Southern Alberta
I did that once to an adjustable regulator, the only thing I had to do was put an o-ring under the jam nut on the adjustment screw threads. It was leaking air through the threads causing a boost/vaccum leak.

Re: Modifying a std fuel regulator for boost reference [Re: Uberpube] #2879432
01/24/21 03:17 PM
01/24/21 03:17 PM
Joined: Sep 2003
Posts: 19,342
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,342
north of coder
i was thinking the same thing, use an o-ring that fit the threads snugly, then use a washer above the o-ring to prevent the lock nut from cutting the o-ring.
beer

Re: Modifying a std fuel regulator for boost reference [Re: Tig] #2879657
01/24/21 10:25 PM
01/24/21 10:25 PM
Joined: Aug 2003
Posts: 43,118
Bend,OR USA
C
Cab_Burge Online work
I Win
Cab_Burge  Online Work
I Win
C

Joined: Aug 2003
Posts: 43,118
Bend,OR USA
Are you feeling lucky with your fuel regulator? work
I wouldn't mess with it, I know buying one in England isn't as easy as it is here but it is January over their also, correct whistling grin


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Modifying a std fuel regulator for boost reference [Re: Cab_Burge] #2880059
01/25/21 06:30 PM
01/25/21 06:30 PM
Joined: Jan 2003
Posts: 2,915
A shed in England
Tig Offline OP
master
Tig  Offline OP
master

Joined: Jan 2003
Posts: 2,915
A shed in England
Thanks for the replies. I'll have a look at the regulator, see how it is to strip it down. There is already a hole in the body, above the diaphragm. If it looks like adding a fitting there will foul the internal mechanism, then it cant be done. That particular model doesn't seem to have a boost referenced equivalent. I want to reference the regulator to the sealed scoop pressure. Not sure how much pressure it will generate but the combo is pretty sensitive to fuel bowl level.
[Linked Image]


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03






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