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-   -   Help car drops 700 rpm when going from neutral to first gear (https://classracer.com/classforum/showthread.php?t=51440)

ollucky 01-19-2014 11:22 AM
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.

Alan Roehrich 01-19-2014 11:58 AM
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.

1320racer 01-19-2014 12:02 PM
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.

Adger Smith 01-19-2014 12:02 PM
Re: Help car drops 700 rpm when going from neutral to first
 
Holley carb?

ollucky 01-19-2014 12:03 PM
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.

1320racer 01-19-2014 12:05 PM
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.

ollucky 01-19-2014 12:07 PM
Re: Help car drops 700 rpm when going from neutral to first
 
Quote:
Originally Posted by 1320racer (Post 417113)
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
Re: Help car drops 700 rpm when going from neutral to first
 
Quote:
Originally Posted by Adger Smith (Post 417114)
Holley carb?
Yes

1320racer 01-19-2014 12:10 PM
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?

ollucky 01-19-2014 12:14 PM
Re: Help car drops 700 rpm when going from neutral to first
 
Quote:
Originally Posted by 1320racer (Post 417120)
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?


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