fuel regulator operating range?

waltermitty Legend when my beer goggles are on

1,993 posts · joined Aug 2002 · 6 Nov 2002, 7:50 pm

#9101

I was looking at a Holley fuel regulator on ebay and now I need to know what psi regulation is necessary for say twin 40 webers? they (hollet regs) seem to have an operating range of 4-9 PSI is that appropriate.
Mitty😎

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Dasdubber DAS Resto Haus

5,746 posts · joined Aug 2002 · 6 Nov 2002, 8:18 pm

#9115

I am not 100% sure so please don't quote me...but I think Webers and Dells like fairly low pressure - in the vicinity of 3-4psi.....I think

There was a fair bit of info on the shoptalkforums.com - type4rum regarding this topic

www.dasrestoparts.com.au

Bizarre Moderator The artist formerly known as blue74l

12,787 posts · joined Aug 2002 · 7 Nov 2002, 7:38 am

#9232

I would say it is too high.
I was told to set my Fuel Pro at 1 1/2 (whhich DID measure 1 1/2 lbs when i stuck a meter on) by one mate and another said "too low" set it at 3 1/2.

I ahve since heard that Dells like slightly higher - i am gathering that is the 3 1/2 setting.
When i an bored i flip between these ranges and my car is fine.
I think i would pass on the Holley

:puke

Futue te ipsum!!!

fullnoise Fahrvergnugen

964 posts · joined Sep 2002 · 13 Nov 2002, 10:38 pm

#10311

I find 3 1/3 pounds works perfectly. It's one of those cheapish dial-type regulators. The first one I had leaked after only 3 weeks (leaking fuel is BAD).

Find the right Holley reg and it will probably be more leak proof. However, you have to set the holley regs up using a fuel pressure gauge. At least then you know it's accurate.

Depending on your level of performance you might want to consider a bigger fuel line and tank fitting.

CYA, CT:sandrine

esratrams

waltermitty Legend when my beer goggles are on

1,993 posts · joined Aug 2002 · 14 Nov 2002, 3:49 pm

#10434

Thanks for the replies. the thing is the cheaper regs are restrictors not regulators the holley ones are. Pressure and flow are not the same you can have huge flow at the same pressure as a pissy flow . this is where the holleys are superior. Also i dont want something that leaks. The fuel lines on later type 3 s from the tanks to the firewall is larger that most they are reduced down at the fire wall so if you remove the last section of line then they are ok for most apps.
Mitty

[Edited on 14-11-2002 by waltermitty]

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70AutoStik Insano Dub Head

730 posts · joined Aug 2002 · 16 Nov 2002, 6:17 pm

#10694

waltermitty wrote:Thanks for the replies. the thing is the cheaper regs are restrictors not regulators the holley ones are.

Actually all regulators are "restrictors," unless you are running a full flow recirculating system as in FI. A better made regulator, such as the Holley, will provide greater flow and better regulation - but for the job it has to do in feeding a carby, it may be overkill (if your cheap regulator is able to provide the requisite flow, the inferior regulation is unlikely to cause any problems.)

[Edit:]

I was reading some Berg stuff the other night; he reckons the cheap "chrome" - style regulators won't provide enough flow for a seriously warmed engine - and he'd built more than I have. I stand corrected.

[Edited on 20-11-2002 by 70AutoStik]