Mech. fuel pump '67 Camaro - Team Camaro Tech
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post #1 of 9 (permalink) Old Aug 20th, 09, 10:22 AM Thread Starter
Tom
 
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Mech. fuel pump '67 Camaro

Using stock Delco mech. fuel pump for modified 350 small block. Appear to be running out of fuel 3rd gear near 6000RPM. Have new 3/8" fuel line and large clean fuel filter. Anyone using Edelbrock pump 1721 or 1722 without crossmember interference? Don't want electric pump if possible. Any suggestions appreciated.
Thanks
Tom Sholl
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post #2 of 9 (permalink) Old Aug 20th, 09, 11:21 AM
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Charlie
 
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Re: Mech. fuel pump '67 Camaro

I had one on my engine with 0 interference issues. They say they make 6psi, but I recommend a regulator.

Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)
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post #3 of 9 (permalink) Old Aug 21st, 09, 06:26 AM
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Chuck
 
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Re: Mech. fuel pump '67 Camaro

Get a Carter high volume pump, about $75, will fit without frame interference like those 6 valve types.
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post #4 of 9 (permalink) Old Aug 21st, 09, 08:09 AM
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Charlie
 
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Re: Mech. fuel pump '67 Camaro

I never had any issues with the Edelbrock 1721, but I did need or should I say, felt peace of mind with a regulator.

Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)
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post #5 of 9 (permalink) Old Aug 25th, 09, 10:32 PM
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Bill
 
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Re: Mech. fuel pump '67 Camaro

I run a Holly pump http://www.summitracing.com/parts/HLY-12-834/ with a regulator and no clearance issues on my '67 They are rated at 7.5 PSI and 80GPH.


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post #6 of 9 (permalink) Old Aug 25th, 09, 10:43 PM
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Matt
 
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Re: Mech. fuel pump '67 Camaro

Quote:
Originally Posted by Shollt View Post
Using stock Delco mech. fuel pump for modified 350 small block. Appear to be running out of fuel 3rd gear near 6000RPM. Have new 3/8" fuel line and large clean fuel filter. Anyone using Edelbrock pump 1721 or 1722 without crossmember interference? Don't want electric pump if possible. Any suggestions appreciated.
Thanks
Tom Sholl
I am experiencing a similar issue - I think. I was wondering how you determined that it's a fuel pump issue instead of carb issue (float level/jetting/etc...)? I also have a stock Delco which I replaced about 1 year ago. I am thinking about installing a nice fuel pressure gage in the car so I can monitor. I guess fuel pressure dropping while in third gear w/high RPMs would lead me to believe there is fuel starvation due to pump.

Matt

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post #7 of 9 (permalink) Old Aug 25th, 09, 10:55 PM
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Mike
 
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Re: Mech. fuel pump '67 Camaro

Cant go wrong knowing with a gauge. When i first started running my sig combo, I had a stock off the shelf auto zone fuel pump, because I was going for the sleeper appearance. At the time I was running Low 750's in the 1/8th. I didnt see a bit of change when I went to the higher flowing Carter style pump. Just a little food for thought.

68 RS, 16mpg, 3200lbs, 355ci, 9.6:1, Ported Kemper Perfomance, production 441s, 76cc, 2.02 1.60. Hyd flat tappet XE274,RPM Performer,750 Holley, 1 5/8 tubes, 2.5 Dynomax full exhaust. 3500, 400TH, 3.73s, caltracs, NA [email protected] 1.62 60ft DA 1400ft.
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post #8 of 9 (permalink) Old Aug 27th, 09, 11:43 AM Thread Starter
Tom
 
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Re: Mech. fuel pump '67 Camaro

Matt:
I'm using the Innovate LM-1 & G4 gauge wide band O2 sensor fuel/air monitor which indicated about 16% F/A in 3rd gear 5600RPM. Changed secondary jets from .101 to .104 with no chg to F/A. Edelbrock says their 650 AVS using .098 sec. jets should be ok with my engine configuration. Didn't monitor F/A in 1st or 2nd being a little busy going down the strip. I am using a 2004R auto trans fortunatley.
Tom Sholl
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post #9 of 9 (permalink) Old Aug 27th, 09, 12:37 PM
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Robert
 
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Re: Mech. fuel pump '67 Camaro

I had the same issue on the '69 running out of fuel on a 1/8 run. Turned out to be the sock on the pickup in the tank was all screwed up.

Robert

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355ci 10:1, 64cc Edelbrocks, Comp Mag 280H, Performer RPM, 700r4 (2000 stall), 3.55 posi A/C PS PDB Hotchkis

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369ci 10.3:1, 64cc Edelbrocks, Voodoo 276/284, Performer RPM, Holley 650DP ...T56 Magnum, 3.73 Moser 12 bolt
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