Issues with my Stocker in need of a carb

pjfouts · 08-03-2015, 12:59 PM

I was running 45-55 under at the begining of the year then all of a sudden I lost 4 tenths. I have replaced the trans, converter, and had the engine refreshened by Jeff Taylor still have not got back my 4 tenths. I am at a loss for where it went.

I am now looking for a Quadrajet 750 CFM for my Olds 307.

Anyone have one that I could try or buy to see if thats the issue?

The car is just not pulling like it used to and we've checked multiple converters so that's not the issue. The rear end is clean nothing wrong there either. The Carb is the last place to check that I know of.

shoot me an email if you have anything that may help pjfouts@yahoo.com. I will be running st.louis divisional hopefully this weekend since I still cant qualify just slow is all.

Thanks,

PJ

JRyan · 08-03-2015, 01:41 PM

PJ,

For starters, the 307 takes the larger 800 cfm carb. Next, I'd look for bad grounds.

Jerry

Future Super Stocker · 08-03-2015, 01:52 PM

Did you check your valve lash and timing? Also make sure the distributor is locked down. I don't see the carb losing 4 tenths unless the air and fuel passages have something blocking them. Metering rod on the hanger??

Dick Butler · 08-03-2015, 02:53 PM

Have you checked amt of fuel being pumped at the carb? Timing is possible. Check for chassis bind. Does it do burn out straight and drive straight.

MR DERBY CITY · 08-03-2015, 03:36 PM

PJ, just a couple more items to check. How old is the battery, I've seen seasoned veterans pull the engine for a rebuild only to find out it was the battery. Do you run a MSD .? It could be giving you problems. Lastly, pull the fuel line at the carb and tell me how many seconds it takes to fill a gallon jug. For your application you should be filling the jug in under 30 seconds. Remember, it's all about the Wally !!"........M.J.

Mark Yacavone · 08-03-2015, 03:51 PM

Did it lose big time 60' , or are the numbers slow ,all the way?
What was it supposed to lose in the warmer weather?
Need more info...

rod butcher · 08-03-2015, 05:15 PM

I would change MSD box, coil and do like MJ suggested with the fuel flow. Check to make sure brakes are free. I will be at Bowling Green pts. race if you need to try on of my spare carbs.

steve krumlauf · 08-03-2015, 06:07 PM

Pj check the line between the pump and the fuel cell it's the only one in the system that has vacuum on it and after some time the inside of the hose collapses and the outside look fine had this issue a few years ago and it was hurting mine 4tenths and it wasn't missing.

pjfouts · 08-03-2015, 06:40 PM

Thanks all I will check that tonight. And I believe you're right it is the 800 I was mistaken from a previous conversation.

08-03-2015, 12:59 PM	#1
pjfouts Junior Member Join Date: Dec 2012 Posts: 37 Likes: 0 Liked 3 Times in 3 Posts	Issues with my Stocker in need of a carb I was running 45-55 under at the begining of the year then all of a sudden I lost 4 tenths. I have replaced the trans, converter, and had the engine refreshened by Jeff Taylor still have not got back my 4 tenths. I am at a loss for where it went. I am now looking for a Quadrajet 750 CFM for my Olds 307. Anyone have one that I could try or buy to see if thats the issue? The car is just not pulling like it used to and we've checked multiple converters so that's not the issue. The rear end is clean nothing wrong there either. The Carb is the last place to check that I know of. shoot me an email if you have anything that may help pjfouts@yahoo.com. I will be running st.louis divisional hopefully this weekend since I still cant qualify just slow is all. Thanks, PJ

08-03-2015, 01:41 PM	#2
JRyan Senior Member Join Date: Apr 2003 Location: Aberdeen SD Posts: 642 Likes: 28 Liked 104 Times in 28 Posts	Re: Issues with my Stocker in need of a carb PJ, For starters, the 307 takes the larger 800 cfm carb. Next, I'd look for bad grounds. Jerry

08-03-2015, 01:52 PM	#3
Future Super Stocker Junior Member Join Date: Aug 2013 Posts: 53 Likes: 1 Liked 3 Times in 3 Posts	Re: Issues with my Stocker in need of a carb Did you check your valve lash and timing? Also make sure the distributor is locked down. I don't see the carb losing 4 tenths unless the air and fuel passages have something blocking them. Metering rod on the hanger??

08-03-2015, 02:53 PM	#4
Dick Butler VIP Member Join Date: Oct 2002 Location: Richmond Indiana Posts: 1,197 Likes: 5 Liked 32 Times in 19 Posts	Re: Issues with my Stocker in need of a carb Have you checked amt of fuel being pumped at the carb? Timing is possible. Check for chassis bind. Does it do burn out straight and drive straight.

08-03-2015, 03:36 PM	#5
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,331 Likes: 859 Liked 6,625 Times in 1,291 Posts	Re: Issues with my Stocker in need of a carb PJ, just a couple more items to check. How old is the battery, I've seen seasoned veterans pull the engine for a rebuild only to find out it was the battery. Do you run a MSD .? It could be giving you problems. Lastly, pull the fuel line at the carb and tell me how many seconds it takes to fill a gallon jug. For your application you should be filling the jug in under 30 seconds. Remember, it's all about the Wally !!"........M.J.

08-03-2015, 03:51 PM	#6
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,418 Likes: 2,582 Liked 4,453 Times in 1,694 Posts	Re: Issues with my Stocker in need of a carb Did it lose big time 60' , or are the numbers slow ,all the way? What was it supposed to lose in the warmer weather? Need more info... __________________ We are lucky we don't get as much Government as we pay for..... Will Rogers

08-03-2015, 05:15 PM	#7
rod butcher Member Join Date: Dec 2005 Posts: 248 Likes: 291 Liked 129 Times in 24 Posts	Re: Issues with my Stocker in need of a carb I would change MSD box, coil and do like MJ suggested with the fuel flow. Check to make sure brakes are free. I will be at Bowling Green pts. race if you need to try on of my spare carbs.

08-03-2015, 06:07 PM	#8
steve krumlauf Junior Member Join Date: Sep 2006 Posts: 36 Likes: 2 Liked 2 Times in 2 Posts	Re: Issues with my Stocker in need of a carb Pj check the line between the pump and the fuel cell it's the only one in the system that has vacuum on it and after some time the inside of the hose collapses and the outside look fine had this issue a few years ago and it was hurting mine 4tenths and it wasn't missing.

08-03-2015, 06:40 PM	#9
pjfouts Junior Member Join Date: Dec 2012 Posts: 37 Likes: 0 Liked 3 Times in 3 Posts	Re: Issues with my Stocker in need of a carb Thanks all I will check that tonight. And I believe you're right it is the 800 I was mistaken from a previous conversation.