 fuel pressure regulator, Carb. Ideal PSI |
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| 80cap |
 Mar 2 2017, 01:28 PM
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#1
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Member  Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None  |
What is the best psi for a carb setup? I already have a low pressure pump but I read that it still might be to high.
Brian |
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| Harpo |
Mar 2 2017, 03:58 PM
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#2
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Senior Member Group: Members Posts: 1,304 Joined: 21-August 11 From: Motor City aka Detroit Member No.: 13,469 Region Association: None |
3.5 psi for carbs
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| Junebug |
Mar 2 2017, 08:07 PM
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#3
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Newbie Group: Members Posts: 20 Joined: 7-May 15 From: East Bay Area NorCal Member No.: 18,713 Region Association: Northern California |
Depends on Carbs, I use a Holly at 2 psi for 10 mm ID line and dual Dellorto 40's
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| Elliot Cannon |
Mar 3 2017, 12:17 AM
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#4
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None 
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I have been using this for my 44idf Webers for about 15 years without a regulator. http://www.cbperformance.com/product-p/3193.htm
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| 80cap |
Mar 3 2017, 06:15 AM
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#5
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
I have dual dell's and the cb performance fuel pump. I will see how well it works. If I need to lower to 2psi what regulator would be recommended?
Brian |
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| stugray |
Mar 3 2017, 08:03 AM
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#6
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
One thing to keep in mind: If you are using pump gas with ethanol, it will likely kill the diaphragm in the cheap pressure regulators in just a year or two. Then the pressure no longer "regulates".
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| 80cap |
Mar 3 2017, 11:31 AM
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#7
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
I plan on 91 octane with no ethanol.
Just down the road from a drag strip. |
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| stugray |
Mar 3 2017, 11:55 AM
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#8
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
QUOTE(80cap @ Mar 3 2017, 10:31 AM)  I plan on 91 octane with no ethanol. Just down the road from a drag strip. I don't even know where to buy gas without ethanol except the local airport. Must be nice.... |
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| porschetub |
Mar 3 2017, 02:38 PM
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#9
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(Junebug @ Mar 3 2017, 03:07 PM) Depends on Carbs, I use a Holly at 2 psi for 10 mm ID line and dual Dellorto 40's That's odd,I have the same regulator (12-804) and can't get 2psi its not in the range if the adjustment,anyway 2psi is low,I run 3.2psi and have no issues. I see in the pic your regulator is screwed right out ,not sure how you get 2psi....just asking (IMG:style_emoticons/default/dry.gif) . |
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| Junebug |
Dec 14 2019, 10:41 AM
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#10
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Newbie Group: Members Posts: 20 Joined: 7-May 15 From: East Bay Area NorCal Member No.: 18,713 Region Association: Northern California |
QUOTE(porschetub @ Mar 3 2017, 12:38 PM) QUOTE(Junebug @ Mar 3 2017, 03:07 PM) Depends on Carbs, I use a Holly at 2 psi for 10 mm ID line and dual Dellorto 40's That's odd,I have the same regulator (12-804) and can't get 2psi its not in the range if the adjustment,anyway 2psi is low,I run 3.2psi and have no issues. I see in the pic your regulator is screwed right out ,not sure how you get 2psi....just asking (IMG:style_emoticons/default/dry.gif) . I know this thread is old, but I want to answer this. the 12-804 has a range of 1-4 psi @ the spec sheet ( https://www.summitracing.com/parts/hly-12-8...a/instructions), and I run a 1-7 psi pump. I run at 2.5 psi now and at 4000-8000 feet altitude. At sea level aggressive driving will starve the car so I turn up psi then. Now to explain my hiatus, I was amazed that I did not reply until I saw the date of your post. That day was Friday and I just won a 2.0 liter engine on e-bay for $0.99, and this seller says " bring a trailer and you can have the car, my landlord wants it gone" So on Monday morning March 6th 2017 (3 days later than your post) I head out at 4 am to Paso Robles Ca, with trailer. I load the car by 9 am and suddenly get severe stomach pains. 911 is called, I take an ambulance ride, poked prodded and suffer for 20 hrs... then 7 days later; I wake up strapped to a hospital bed, high on morphine and 25 pounds lighter (due to the 20 feet of small intestine they removed). I Had a abdominal stroke. Since I've been fighting to survive, but starting to work on that very same car that cost me my guts. I don't know that anyone will ever read this update, but that experience was life changing and I kinda believe in karma now so... |
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| Junebug |
Dec 14 2019, 11:07 AM
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#11
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Newbie Group: Members Posts: 20 Joined: 7-May 15 From: East Bay Area NorCal Member No.: 18,713 Region Association: Northern California |
Oh here's that car "Tang" on the rotisserie. There has been no movement in that garage from that day 2017 until this year 2019 around July..
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