I know the Eldebrock specs are 6 1/2 lbs fuel pressure recommended . But what fuel pressure do you run on 1406/1405 performer carb that you run for everyday driving. Has sbc 350 .low end mid range cam.
I run a mechanical pump from gearhead performance and it shows 5 1/2 -6 1/2 on my gauge. 327,headers,aluminum intake,pertronics conversion,not sure of cam,but surely not much if any more than stock
We had a horrible time with flooding past the floats on a dual setup with an Edelbrock "street" pump. Wasted LOTS of time adjusting floats. Got it DIALED in, drove it, it flooded and died, opened the hood, and the manifold depressions were FULL of gas. (No Fuel Line Leaks) Close! Installed regulator and gauge! Very touchy over 5 lbs.
I checked my stock GM mechanical pump and it was putting out 8 lbs. My car was hard starting after a run, but started fine cold. I added a regulator set at 6 lbs plus a carb spacer and now she starts fine after a run. Edelbrock carbs get heat soaked when the engine is hot.
" Carburetor flooding can be cause by the following conditions. First, verify, with a fuel pressure gauge that the pressure does not exceed 6.5 psi. Floats should be set to the factory spec of 7/16, (see owners manual)(download here). Needles & Seats can be clogged with debris, not allowing them to close. They can be cleaned and checked when the float level is being verified. Floats can be sinking due to a leak. Verify floats are free of any fluid by shaking the float, or submersing it in a safe, non flammable fluid." From here: http://www.edelbrock.com/automotive_new/misc/tech_center/install/carb_faq.shtml So, 5 may work, but 6 works GREAT on mine. Maybe I've got mine adjusted right.
That's probably because you realize that sufficient fuel pump volume is more important than extra pressure. Get the pressure down to 4 or 5 pounds and IF it ends up starved for fuel (which I doubt it will) you might need more fuel volume, but not more pressure.
I had problems with a edelbrock 600cfm Asked the Eldebrock rep at a show & he said to put a regulator on it & run it at 3.5 psi It has ran well for the last 3 years
Since Santa Clara, 3.5 to 5 PSI, 4 desired! Spent so many years with BMW F.I. systems it was 'uncertain' sometimes to drop fuel pressure to the 'old settings'... But I forced myself.
I have run many Edelbrocks over the years, and continue to do so and always set them up about 5-6 lbs and have never had a problem.
Thanks for the information . My 33 has a mechanical pump on it and no regulator 7# fuel pressure probably . Everything that was was as described flooding .hard starting. I be installing inline regulator next week and start out with 5#. and check float level. thanks Again
As what has been stated above with a carbed engine you need volume not pressure. I most cases 4-5psi with a good pump will do the job.
I run a electric fuel pump, on a stock 350 with a 1406. Description for the pump says it runs at 4-7 psi, no regulator. I haven't had any problems. Posted from the TJJ App for iPhone & iPad
I have a 350 punched .040. Mild cam, HEI, and an edlebrock carb. 600cfm. Last year I was havin issue's. Runs rich, studders a little....I had to hold the throttle to the floor when it was hot or it wouldn't start...... Over the winter, I tore it down, and found my high float setting on 1 side was off.... SO I cleaned it up, got a rebuild kit, and leaned out the jets and metering rods..... Not realizing the high setting was as important as the low.... Now it runs great ! starts hot or cold almost instantly....' I am running a stock mechanical pump, I have put as much as 9 psi on my sons 289 / edlebrock carb with no issues.....
with such a crazy price range on regulators, what would you all recommend for brand. mallory, spectre, edelbrock, holley?
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