Author Topic: SBC 305 HEI Distributor?  (Read 17018 times)

Offline ccz145a

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Re: SBC 305 HEI Distributor?
« Reply #15 on: May 08, 2008, 06:57:38 PM »
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the diagram is nice, but you can start your number 1 anywhere.  you don't have to have it at a certain place.  that was just where the factory put it.  it will start firing #1 and so forth whereever you wanna start it...

Now, don't muddy the waters ;) ... the tips so far are advising he find #1 TDC then point the rotor towards the #1 cylinder and the diagram is just to help visualize the point. Once he gets running we can tell how he could have done it.
1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
11MPG Downhill w/tailwind (but there ain't no hills here)

Offline Fordeatinz71

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Re: SBC 305 HEI Distributor?
« Reply #16 on: May 08, 2008, 09:08:27 PM »
you're right, i'm sorry bout that 197!  just do it by the diagram man!
1991 Chevy Silverado K1500 ECSB, 350, 700R4 w/shift kit, 3.42's, exhaust work...
1983 GMC Sierra K1500 SWB-sold :(

Offline 197

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Re: SBC 305 HEI Distributor?
« Reply #17 on: May 09, 2008, 03:39:32 PM »
Got it fired up today. Theres no timing notches on this 305 so the owner is going to pick up one of those timing bracket things. We got to figure out all the vacuum lines on the carb I believe that there is three. I think its a Holley 4160 But it has a manual choke.

If anyone can pull a diagram for this carb I would really appreciate it. I got 1 pic of the carb off my phone but I cant get anymore until monday.


'73 C20 454

Offline HAULIN IT

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Re: SBC 305 HEI Distributor?
« Reply #18 on: May 09, 2008, 04:14:52 PM »
No that is not a 4160, I'm not sure of numbers, but I believe it is a  "Street Avenger" carb. I'm not very familiar with them. What "diagram" are you hoping to get? Glad to hear you got it running! Lorne

Offline ccz145a

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Re: SBC 305 HEI Distributor?
« Reply #19 on: May 09, 2008, 04:21:44 PM »
Nope not a Street Avenger. What is stamped on the air horn?

Found this little blurb on another forum...
http://www.hotrodder.com/cgi-bin/forum/YaBB.cgi?board=02;action=display;num=1162772856
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Holley made two model carbs that used the top plate like a Carter or an Edelbrock.  It was a newer design that Holley came up with (years ago) to help alliviate the leaking problem (which Holley's are notorious for).  The two models were the 4010 and the 4011.  If I remember right, the 4010 ranged from 600 to 750cfm(somewhere in and around there) and the 4011 ranged from 650 to 800cfm.  The quickest way to determine which one you have is to look at the butterfly valves.  The 4010 had all four butterfly valves the same size.  The 4011 had two small primary valves and two large secondaries, much like a Quadrajet.  The second way of telling is the 4010 pretty much had a straight side on the top plate whereas the 4011 was irregular because the secondaries were so huge.  The secondaries buldged out more on the side than the primaries did.  The third way of telling is the choke-horn.  On the 4010, it was a wide-mouth opening and the opening faced the rear of the carb.  The 4011 had a smaller choke-horn and faced the front of the carb.  Hope this helps.
« Last Edit: May 09, 2008, 04:26:42 PM by ccz145a »
1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
11MPG Downhill w/tailwind (but there ain't no hills here)

Offline 197

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Re: SBC 305 HEI Distributor?
« Reply #20 on: May 09, 2008, 04:28:00 PM »
Thats what are "Teacher" told us. What I want to figure out, are the vacuum lines on the carb, there are 3.

We had it running at idle for about 10 minutes. As soon as you would touch the throttle it would die (im thinking thats timing issue) We turned it off for a few minutes to check some leaks and hoses and then it would fire run for a few seconds and then die. (timing also?)
'73 C20 454

Offline 197

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Re: SBC 305 HEI Distributor?
« Reply #21 on: May 09, 2008, 04:28:51 PM »
Nope not a Street Avenger. What is stamped on the air horn?

I wont be able to find out until Monday. The secondary are bigger then the others though.
'73 C20 454

Offline ccz145a

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Re: SBC 305 HEI Distributor?
« Reply #22 on: May 09, 2008, 04:37:28 PM »
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The secondary are bigger then the others though
In that case, it's a 4011.

Here is a link to a schematic: http://www.holley.com/data/TechService/Technical/4011%20Exploded%20View.pdf

Of course, that still doesn't tell you what you want to know. If there are 3 ports... The big one in the back is for power brake booster, then one of the smaller ports is ported vacuum, and the other small one is unported. Most people hook up the distributor to the ported one, it varies vacuum with throtle. You should be able to hear and feel the unported vacuum at idle. If none of the ports were plugged, then that could cause the engine to not idle right and stumble, especially the big one in the rear.
« Last Edit: May 09, 2008, 04:50:18 PM by ccz145a »
1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
11MPG Downhill w/tailwind (but there ain't no hills here)

Offline 197

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Re: SBC 305 HEI Distributor?
« Reply #23 on: May 09, 2008, 04:49:09 PM »
thanks!
'73 C20 454

Offline HAULIN IT

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Re: SBC 305 HEI Distributor?
« Reply #24 on: May 10, 2008, 03:58:11 PM »
Glad you got it figured out. Those carbs never caught on, I seem to remember them having a "catchy name" of some sort, going solve all carb problems! you know how it goes. Just as was mentioned, the vacuum hose routing only matters if you still have all of the correct pieces in place. Plug off the ones you don't need, that's all. Have Fun & I hope you have learned a little, Lorne