4150 throttle linkage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Tom Vogel** · 07-04-2010, 06:54 PM

Anyone running a 4150 Holley? What are you running for a throttle linkage? Cant seem to get the secondaries to open with the stock cable.

prostreetC-10 · 07-04-2010, 07:41 PM

You can get a 4150 in both vacuum and double pumper, also most are DP's. If you disconnect the linkage, can you get them to open up by using your hand? Think we need a little more info. You can get them to open up just fine with the rod style or cable. I am using both. Must be a geometry issue. Pics of what you are currently trying would help so we can see where you have it hooked to the carb.

**Tom Vogel** · 07-05-2010, 06:24 PM

Quote:

Originally Posted by prostreetC-10

You can get a 4150 in both vacuum and double pumper, also most are DP's. If you disconnect the linkage, can you get them to open up by using your hand? Think we need a little more info. You can get them to open up just fine with the rod style or cable. I am using both. Must be a geometry issue. Pics of what you are currently trying would help so we can see where you have it hooked to the carb.

Of course;
Its a mechanical secondary 925 blow through application from the Carb Shop. Yes, I can open it by hand. Im hoping to use the stock cable, and pedal as I hope you can see in the pics. Im using a Jegs adjustable bracket, but Im thinking maybe the stock bracket would be a better choice?
Anyway, the way it is now, it ony goes far enough to open the primaries. My Cobra buddy says, "Hey, thats a great govenor!"

Sorry, the last pic is fuzzy...
TIA, Tom

**Captainfab** · 07-05-2010, 10:52 PM

I would say you need to move your ballstud forward to the hole in front of where it is now.

rattleon · 07-05-2010, 11:10 PM

Ball stud needs to be where return spring bracket is now.

chevytruck1970 · 07-06-2010, 01:21 AM

Quote:

Originally Posted by rattleon

Ball stud needs to be where return spring bracket is now.

I agree had the same problem with the same bracket on a friends truck.

**Tom Vogel** · 07-06-2010, 09:42 AM

Quote:

Originally Posted by Captainfab

I would say you need to move your ballstud forward to the hole in front of where it is now.

Quote:

Originally Posted by chevytruck1970

I agree had the same problem with the same bracket on a friends truck.

OK then, should I do away with the Jegs bracket altogether and use the original factory bracket and just depend on the spring on the carb?

**Captainfab** · 07-06-2010, 11:14 PM

It's been my experience that vehicles with mechanical linkage use the large upper hole where you have your return spring now. Vehicles with cable linkage typically use the hole below and rearward, This is where the ballstud should go. Do you have enough cable left to move the ballstud forward? I've not used the Jegs throttle cable bracket, so I don't know what to say about that. If it is restricting sufficient throttle opening, it may need to either be modified or replaced.

I would leave the return spring where it is for now.

I just had a thought....are there different throttle cables for these trucks with a small block versus a big block?

Quote:

Originally Posted by Tom Vogel

OK then, should I do away with the Jegs bracket altogether and use the original factory bracket and just depend on the spring on the carb?

KQQL IT · 07-07-2010, 02:06 AM

Another thought, two return springs? On different note i used to work around the corner to the carb shop sure heard some great music from their dyno..

prostreetC-10 · 07-07-2010, 09:03 AM

Quote:

Originally Posted by Tom Vogel

OK then, should I do away with the Jegs bracket altogether and use the original factory bracket and just depend on the spring on the carb?

ABSOLUTELY do not use just the return spring that the carb has. It might seem strong when you are using it without the weight of the cable hooked up. Once you have the weight of the throttle system on the primary linkage, it is VERY unsafe to use just the return spring on the primary shaft.

They make little brackets that can bolt down to the rear stud and allow you to hook a return spring to the bottom of the linkage as Captfab suggested. I like them because it's much cleaner looking than having a big ole spring going to your radiator and the front of the carb. ;o)

I have an old tow rig that I didn't really care about looks and I actually had to bend the bent part of the primary bracket straight that is used for an A/C fast idle solenoid and drill a hole in it for my ball stud. Gave me enough throw for full throttle but looks kinda hillbilly!

07-04-2010, 06:54 PM	#1
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	4150 throttle linkage Anyone running a 4150 Holley? What are you running for a throttle linkage? Cant seem to get the secondaries to open with the stock cable.

07-04-2010, 07:41 PM	#2
prostreetC-10 My Carbon Footprint Join Date: Oct 2008 Location: Orygun Posts: 5,527	Re: 4150 throttle linkage You can get a 4150 in both vacuum and double pumper, also most are DP's. If you disconnect the linkage, can you get them to open up by using your hand? Think we need a little more info. You can get them to open up just fine with the rod style or cable. I am using both. Must be a geometry issue. Pics of what you are currently trying would help so we can see where you have it hooked to the carb. __________________ A quick "pedalfest" *Still getting loose (carb test)* 496 Initial fire up video!

07-05-2010, 10:52 PM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 4150 throttle linkage I would say you need to move your ballstud forward to the hole in front of where it is now. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

07-05-2010, 11:10 PM	#5
rattleon Registered User Join Date: Oct 2009 Location: Idaho Posts: 44	Re: 4150 throttle linkage Ball stud needs to be where return spring bracket is now. __________________ 1970 c-10 short/step box morphing into street/strip 1967 RS/SS convertible Camaro 1932 Henry Ford steel 5 window coupe highboy hotrod 1931 full fendered model A sedan AV8 traditional hotrod. 1934 Ford 5 window coupe and a (pile-of-parts) 1929 Model A coupe, plus our "normal" people vehicles.

07-07-2010, 02:06 AM	#9
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,271	Re: 4150 throttle linkage Another thought, two return springs? On different note i used to work around the corner to the carb shop sure heard some great music from their dyno.. __________________ " That didnt make it any newer " " Dont antique the equipment "



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