Help car drops 700 rpm when going from neutral to first gear

ollucky · 01-19-2014, 11:22 AM

New combination 406.

Car drops 700 rpm when going from neutral to first gear and will eventually die. It gets worse when the car is at operating temp. Ignition?

Please Help.

Alan Roehrich · 01-19-2014, 11:58 AM

Sounds a lot more like carburetor than ignition. Quickest way to find out is to swap another on it. Also, check the power valve(s) if so equipped.

1320racer · 01-19-2014, 12:02 PM

either lock out the distributor or recurve it so it has ~ 20 degrees initial and 16-18 degrees mechanical advance. Easy to do with an MSD distributor.

Adger Smith · 01-19-2014, 12:02 PM

Holley carb?

ollucky · 01-19-2014, 12:03 PM

Also very hard to start at operating temp!

Little M Block 14:1 cam @ 50 278 intake 290 exhaust 111 lobe separation AFR 210's 5800 stall 750 carb that flows 920.

1320racer · 01-19-2014, 12:05 PM

way too big cam and not enough stall but that's not your question.

ollucky · 01-19-2014, 12:07 PM

Quote:

Originally Posted by 1320racer

either lock out the distributor or recurve it so it has ~ 20 degrees initial and 16-18 degrees mechanical advance. Easy to do with an MSD distributor.

Distributor locked.

ollucky · 01-19-2014, 12:10 PM

Quote:

Originally Posted by Adger Smith

Holley carb?

Yes

1320racer · 01-19-2014, 12:10 PM

how's the carb setup/baselined...how/where are the floats set, same question for transfer slots? What is the idle set at? Also how much fuel pressure?

ollucky · 01-19-2014, 12:14 PM

Quote:

Originally Posted by 1320racer

how's the carb setup/baselined...how/where are the floats set, same question for transfer slots? Also how much fuel pressure?

Jet size 82 all the way around float level fine. transfer slot I don't know. how do I check?

01-19-2014, 11:22 AM	#1
ollucky Junior Member Join Date: Jun 2009 Location: San Antonio, Texas Posts: 32 Likes: 0 Liked 0 Times in 0 Posts	Help car drops 700 rpm when going from neutral to first gear New combination 406. Car drops 700 rpm when going from neutral to first gear and will eventually die. It gets worse when the car is at operating temp. Ignition? Please Help.

01-19-2014, 11:58 AM	#2
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,907 Likes: 993 Liked 1,032 Times in 270 Posts	Re: Help car drops 700 rpm when going from neutral to first Sounds a lot more like carburetor than ignition. Quickest way to find out is to swap another on it. Also, check the power valve(s) if so equipped. __________________ Alan Roehrich 212A G/S

01-19-2014, 12:02 PM	#3
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 1,776 Likes: 70 Liked 398 Times in 189 Posts	Re: Help car drops 700 rpm when going from neutral to first either lock out the distributor or recurve it so it has ~ 20 degrees initial and 16-18 degrees mechanical advance. Easy to do with an MSD distributor.

01-19-2014, 12:02 PM	#4
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,348 Likes: 433 Liked 676 Times in 260 Posts	Re: Help car drops 700 rpm when going from neutral to first Holley carb? __________________ Adger Smith (Former SS)

01-19-2014, 12:03 PM	#5
ollucky Junior Member Join Date: Jun 2009 Location: San Antonio, Texas Posts: 32 Likes: 0 Liked 0 Times in 0 Posts	Re: Help car drops 700 rpm when going from neutral to first Also very hard to start at operating temp! Little M Block 14:1 cam @ 50 278 intake 290 exhaust 111 lobe separation AFR 210's 5800 stall 750 carb that flows 920.

01-19-2014, 12:05 PM	#6
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 1,776 Likes: 70 Liked 398 Times in 189 Posts	Re: Help car drops 700 rpm when going from neutral to first way too big cam and not enough stall but that's not your question. Last edited by 1320racer; 01-19-2014 at 04:45 PM.

01-19-2014, 12:10 PM	#9
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 1,776 Likes: 70 Liked 398 Times in 189 Posts	Re: Help car drops 700 rpm when going from neutral to first how's the carb setup/baselined...how/where are the floats set, same question for transfer slots? What is the idle set at? Also how much fuel pressure?