holley 3 barrels...

JoeG · #1 04-21-2004, 04:15 AM

On the 950,when you get the secondaries to open at the right time and ample fuel gets delivered to prevent a slight bog it pulls like a bear on top end---All these things can be accomplished with a little work----BUT it can be done much easier with 3310 OR 850 DOUBLE pumper---especially having secondary jets to play with.---JoeG

COPO PETE · #2 04-22-2004, 02:27 PM

I have taken the 850 off my ZL-1 and put on a worked 850 that flows 996cfm. The car slowed down a little bit. since that test though, I put on a new fuel pump with my stock 850 and picked up 3 mph!!! So now i will have to try the 996 cfmer again. Keep in mind this is with a stock cam and exhaust manifolds. When i bought that carb, it was for my 55 Chev with a 502/headers and it picked up 3 tenths instantly.
Peter

Chevy454 · #3 04-23-2004, 12:51 AM

[ QUOTE ]
I have taken the 850 off my ZL-1...

[/ QUOTE ]

Must be nice!

JoeG · #4 04-23-2004, 01:50 AM

COPOPETE,
When you said you replaced the fuel pump--was the pump wearing out or did you step up to a pump with more flow --JoeG

COPO PETE · #5 04-23-2004, 01:56 AM

It was a brand new GM pump for an L-72. I put an Holley pump on it. Also I use the 3/8 line to "T" with 5/16 which likely does not help it any! Also found it interesting that going from a 780 vac to 850 DP the car picked up 3 tenths in back to back runs. When they tested Charlies ZL-1 in 69 they were running the 780 vac on it from what I understrand!
Peter
Peter

JoeG · #6 04-23-2004, 02:57 AM

[quote Also found it interesting that going from a 780 vac to 850 DP the car picked up 3 tenths in back to back runs.
Peter
Peter

[/ QUOTE ]

Just to make sure----You mean you ran 3 tenths quicker???---Joe

**PxTx** · #7 04-23-2004, 03:34 AM

Speaking of the fueling of a Daytona carb, does anyone have a source for mechanical secondary squirters? I had a tough time finding them new- although I did.

JoeG · #8 04-23-2004, 04:40 AM

pxtx,
You mean the Gear-Drive Carb injector Motion use to handle???--JoeG

COPO PETE · #9 04-23-2004, 06:36 AM

850= +3 tenths!

Peter

JoeG · #10 04-23-2004, 06:58 AM

THANKS PETE it's been a long day---

pxtx,

Nice find---That setup was really meant for a well geared stick set-up for track use, one can learn to live with it on the street, but before you start modifying your 950--you might find some of the lesser solutions to tuning the 950 might work for your car if it is going to be used mostly on the street------Joe

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