Just about got this Holley under control, just about... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

n737nc · 10-04-2004, 06:25 PM

Alright, I am making progress on this Holley 700DP. Still need a little more help though.

We've got it where it will run. It will hold a steady throttle position, and it will idle if it is above 1100rpm's.

It sounds good when you rev it up, sounds clean(no spudering). But, anything below 1100rpm's and it dies.

I've tried putting different power valves in it. I've changed just about all of the gaskets. And nothing helps.

Anybody got any clues?

Nick

vtblazer · 10-04-2004, 07:24 PM

I have a 650 holley spreadbore double pumper that does the same thing...

Sure hope somebody knows the answer...
Runs awesome right up until it needs to idle.

Acts like the idle circuit is non-existent.

Brainchild · 10-04-2004, 07:48 PM

Do you have the floats set right,and you might try dropping a couple of sizes in the jetting.

Do you see or smell any fuel smoke that might indicate it is running rich?

n737nc · 10-04-2004, 09:44 PM

Yes there is a little smoke. I have a 69 jet up front and a 78 in the back. What should I drop them down to?

Thanks,
Nick

10-04-2004, 06:25 PM	#1
n737nc Registered User Join Date: Jun 2004 Location: Dallas, Tx Posts: 207	Just about got this Holley under control, just about... Alright, I am making progress on this Holley 700DP. Still need a little more help though. We've got it where it will run. It will hold a steady throttle position, and it will idle if it is above 1100rpm's. It sounds good when you rev it up, sounds clean(no spudering). But, anything below 1100rpm's and it dies. I've tried putting different power valves in it. I've changed just about all of the gaskets. And nothing helps. Anybody got any clues? Nick

10-04-2004, 07:24 PM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Carb I have a 650 holley spreadbore double pumper that does the same thing... Sure hope somebody knows the answer... Runs awesome right up until it needs to idle. Acts like the idle circuit is non-existent.

10-04-2004, 07:48 PM	#3
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	Do you have the floats set right,and you might try dropping a couple of sizes in the jetting. Do you see or smell any fuel smoke that might indicate it is running rich? __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

10-04-2004, 09:44 PM	#4
n737nc Registered User Join Date: Jun 2004 Location: Dallas, Tx Posts: 207	Yes there is a little smoke. I have a 69 jet up front and a 78 in the back. What should I drop them down to? Thanks, Nick



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