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Search: Posts Made By: BigBlockk
Showing results 1 to 25 of 493
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Forum: C3 Tech/Performance
06-10-2013, 07:49 PM
Replies: 36
Views: 4,827
Posted By BigBlockk

I'm confused, did I ask you something? Maybe...

I'm confused, did I ask you something?

Maybe my post was defective or got redirected or something. I asked the thread starter why the secondary air door is open. I didn't ask about the choke.
...
Forum: C3 Tech/Performance
06-10-2013, 06:26 AM
Replies: 36
Views: 4,827
Posted By BigBlockk

You should get a Rochester carburetor book so...

You should get a Rochester carburetor book so that you can learn enough to describe the problem more accurately.

Also, why is the secondary air door open?

BigBlockk

Later.....
Forum: C3 Tech/Performance
05-19-2013, 09:53 PM
Replies: 12
Views: 3,575
Posted By BigBlockk

Ran the cables over the trans right next to each...

Ran the cables over the trans right next to each other. I added a piece of 1/4" thick conveyor belting (I work in a coal fired power plant) to separate the cables. I wrapped it with electrical tape...
Forum: C3 Tech/Performance
05-19-2013, 09:11 PM
Replies: 12
Views: 3,575
Posted By BigBlockk

I had this problem with my '70 many moons ago. I...

I had this problem with my '70 many moons ago. I finally ran both cables to the starter. The positive to the solenoid and the negative to one of the starter mounting bolts. That way you don't have to...
Forum: C3 Tech/Performance
05-17-2013, 11:20 PM
Replies: 96
Views: 4,416
Posted By BigBlockk

Did you happen to notice if there is a limiter...

Did you happen to notice if there is a limiter bushing on the mechanical advance limit pin? These pins travel in a groove. Generally this groove is too long and will give too much mechanical advance...
Forum: C3 Tech/Performance
05-13-2013, 07:25 AM
Replies: 16
Views: 7,184
Posted By BigBlockk

The fan clutch may be worn out or there may be...

The fan clutch may be worn out or there may be air in the system. Also, make sure the lower rad hose isn't collapsing.

BigBlockk

Later.....
Forum: C3 Tech/Performance
05-11-2013, 04:24 AM
Replies: 20
Views: 3,760
Posted By BigBlockk

If the exhaust heat riser valve is stuck shut it...

If the exhaust heat riser valve is stuck shut it will overheat the intake manifold. This is more than enough to boil the gasoline out of the engine.

BigBlockk

Later.....
Forum: C3 Tech/Performance
05-09-2013, 02:54 AM
Replies: 41
Views: 9,960
Posted By BigBlockk

Yes the LS5 had the large bleeds. Sorry I misled...

Yes the LS5 had the large bleeds. Sorry I misled you earlier. Any more I just assume that every Quadrajet has been hosed because I see so many of them. I just got one off of ebay. When I opened it up...
Forum: C3 Tech/Performance
05-06-2013, 11:35 AM
Replies: 41
Views: 9,960
Posted By BigBlockk

I went back through this thread and there was...

I went back through this thread and there was something I missed. I believe it was late in the '69 model year the air bleed arrangement changed from small bleeds to large bleeds. There was a strike...
Forum: C3 Tech/Performance
05-05-2013, 09:55 PM
Replies: 41
Views: 9,960
Posted By BigBlockk

I have no doubt he is into the secondaries at...

I have no doubt he is into the secondaries at 4000. I'm thinking that the engine begins to breakup before the richest portion of those AX rods is actually metering the fuel to the secondaries. With...
Forum: C3 Tech/Performance
05-05-2013, 06:00 PM
Replies: 41
Views: 9,960
Posted By BigBlockk

I believe the primary jetting is WAY lean. That...

I believe the primary jetting is WAY lean. That 72 main jet is getting you a WOT metering area of 407. The stock '70 LS5 had a 78 main jet that gave an area of 477. The '70 LS5 tune was 78/49 primary...
Forum: C3 Tech/Performance
04-29-2013, 10:32 PM
Replies: 9
Views: 10,326
Posted By BigBlockk

Go with the nitrophyl. Also, make sure the seat...

Go with the nitrophyl. Also, make sure the seat is screwed all the way in. It may have come loose allowing fuel to come through the threads.

BigBlockk

Later.....
Forum: C3 Tech/Performance
04-29-2013, 10:10 PM
Replies: 9
Views: 10,326
Posted By BigBlockk

ALWAYS USE THE HANGER!!! It is possible for...

ALWAYS USE THE HANGER!!!

It is possible for the needle to stick in the seat. Always use the hanger.

The float hanger should be placed on the side of the ledge that faces the float bulb.

To...
Forum: C3 Tech/Performance
04-28-2013, 05:41 PM
Replies: 9
Views: 10,326
Posted By BigBlockk

If the float is covered with gasoline it has...

If the float is covered with gasoline it has either sunk or there is something stuck in the fuel inlet needle and seat.

Remove the top of the carburetor and make sure the fuel inlet is clean. Make...
Forum: C3 Tech/Performance
04-27-2013, 01:09 PM
Replies: 33
Views: 4,227
Posted By BigBlockk

More advance would help. Try 14 to 16 degrees. ...

More advance would help. Try 14 to 16 degrees.

Do the end carburetors even have idle circuits? I know there is a tool and procedure for balancing these carburetors on the engine. Sounds like you...
Forum: C3 Tech/Performance
04-09-2013, 12:30 AM
Replies: 11
Views: 830
Posted By BigBlockk

It sounds like the secondary air door preload...

It sounds like the secondary air door preload needs to be increased. Try increasing it 1/8'th of one (1) turn and see if it helps.

GO SLOW!!!

You don't want to bend this spring out of shape....
Forum: C3 Tech/Performance
04-16-2012, 08:25 PM
Replies: 8
Views: 965
Posted By BigBlockk

The ID number should be stamped on the choke...

The ID number should be stamped on the choke horn.

The "dash pot" is the choke pull off. This is not a vacuum secondary carburetor.

Remove the choke pull off to set the idle mixture. Set the...
Forum: C3 Tech/Performance
12-01-2008, 10:45 AM
Replies: 7
Views: 5,817
Posted By BigBlockk

Lars Quadrajet paper says it's a 1970 396 truck...

Lars Quadrajet paper says it's a 1970 396 truck carburetor that has been blessed by California.

BigBlockk

Later.....
Forum: C3 Tech/Performance
11-29-2008, 01:29 PM
Replies: 24
Views: 14,151
Posted By BigBlockk

There are plenty of things that are different of...

There are plenty of things that are different of a 'Jet. Idle pickup tubes, idle and high speed air bleeds, idle bypass air or the lack of it, pull over enrichment systems, secondary air management...
Forum: C3 Tech/Performance
11-29-2008, 12:59 PM
Replies: 3
Views: 264
Posted By BigBlockk

How is the high cruise mixture? Larger jets may...

How is the high cruise mixture? Larger jets may screw up the high cruise mixture. You may need to open up on the PVCR.

BigBlockk

Later.....
Forum: C3 Tech/Performance
11-29-2008, 12:28 PM
Replies: 14
Views: 390
Posted By BigBlockk

It sounds to me like you have the engine idling...

It sounds to me like you have the engine idling on the main circuit. If you retard the ignition timing excessively you will have to open up on the idle speed adjustment. This can get so bad that you...
Forum: C3 Tech/Performance
11-21-2008, 12:44 AM
Replies: 4
Views: 414
Posted By BigBlockk

The idle mixture screws control the amount of...

The idle mixture screws control the amount of emulsified fuel that flows into the intake manifold. This fuel/air mixture is then mixed with additional air coming in around the primary throttle blades...
Forum: C3 Tech/Performance
11-14-2008, 06:41 AM
Replies: 27
Views: 2,549
Posted By BigBlockk

Wayne Nelson (forum member Mr.L88) doesn't have...

Wayne Nelson (forum member Mr.L88) doesn't have any trouble launching street tires.
...
Forum: C3 General
10-31-2008, 01:54 AM
Replies: 12
Views: 373
Posted By BigBlockk

Are you talking about something like this? ...

Are you talking about something like this?

http://www.greenwoodcorvettes.com/Race%20cars/74,%2075,%2076/75/75Sebringengineleft.jpg

BigBlockk

Later.....
Forum: C3 General
10-28-2008, 07:59 PM
Replies: 20
Views: 778
Posted By BigBlockk

The U.S. auto manufactures have been using cold...

The U.S. auto manufactures have been using cold air induction seance the mid '70's. This was done to get back some performance that was lost due to the addition of pollution control equipment to the...
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