FE Power Forums
FE Power Forums => Non-FE Discussion Forum => Topic started by: Drew Pojedinec on May 30, 2024, 11:01:39 AM
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https://www.facebook.com/share/v/cahzhyfqJfN3SQko/?mibextid=WC7FNe
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A lot of people don’t realize all the little specification “details” that go into a carburetor’s calibration, and designed into matching it’s original application. There is more to a carburetor than just it’s CFM rating LOL. Thanks for taking the time that show a reproduction isn’t always an “accurate” reproduction, even when made by the original company. Your videos are always informative.
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Biggest issue would be the mile wide gap between the main body and throttle body.
The idle feeds are kinda crushed too, I’ll open them up a good bit.
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Holy cow.
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All I can say is I'm not the guy who bought that carburetor LOL! Thanks for the help on that Drew, my Boss 429 engine will certainly appreciate it - Jay
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Is why I take videos… lol
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...my Boss 429 engine will certainly appreciate it - Jay
Nobody is going to ask? Boss 429? In what car?
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Probably going into his Ford GT ;)
KS
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Long story short, after owning my Ford GT for almost 20 years, watching the value go so high that I didn't even feel comfortable driving it anymore, I worked a deal to basically swap the Ford GT and a little cash for two Boss 429 Mustangs. One of them is complete and a survivor, needs paint and a good cleanup, and didn't run well when I bought it, but after some steering and brake work, a new carb (not the one that Drew is doing), and tune up/oil change, it runs and drives great. Maybe the nicest driving old Mustang I've ever had. The second car I bought in pieces. It was totally restored about 10 years and 750 miles ago and the previous owner put a Kaase Boss 429 in it. When he decided to sell it he wanted to put an original Boss 429 engine in it, which he had purchased new (!!) in 1969, along with a different Boss 429 car. Anyway the engine needed a rebuild, so he did that, but made the mistake of putting standard bearings on a 10/10 crank :o Fired it up on the engine stand and had low oil pressure so he tore it all down. It was all sitting there when I bought it. It is a beautiful car, probably the nicest looking old Mustang I've ever had. I rebuilt the engine, dynoed it (425 HP and 446 ft-lbs, all stock except a hydraulic roller cam), but the carb I got with the engine didn't run right, so I dynoed it with a 750 double pumper I had on the shelf. I sent the carb to Drew, and glad I did; I would have never thought to look for a gap between the main body and the base plate...
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Hey Jay---
With enough work on the Ford GT's engine, and a change from gas to methanol to go along with a change to turbos, that GT would have been capable of going 300+ in one mile from a standing start. Didn't that make you sorta itchy? :)
KS
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I certainly don't blame you for passing on the GT. A car you're afraid to drive is no fun.
The story sounds interesting on the Boss '9s, especially the survivor.
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Finally a HP figure from a reliabel source on a boss nine. So 425/ 446 stock except the cam.
I guess thaths not a radical grind
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Right Heo, with those heads I was hoping for more. I think if I could have spun it higher it may have done better, but the dual point distributor pretty much gave up between 5500-5800. Seems like with headers, an electronic distributor, and maybe a bigger cam, you could get to 475-500 HP. But not in stock trim, that's for sure.
I thought it was interesting that a basically stock 428CJ would make quite a bit more torque. Those huge ports on the Boss 9 really hurt torque production. No wonder everybody said that a good running 428CJ would beat a Boss 429 back in the day...
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the stock boss intake is a dual plane and kills hp.if you had room,the kaase intake is a big improvement.that said,and better cam and headers added 100 hp to other wise stock boss engines.dick serdinak from ohio had a nhra stocker he ran,and went 10.70s with full weight car,and engine was not fully built for the class.back in the day lol.
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The real question is, why are we just hearing about these bosses and why no pictures and dyno videos?😂😂
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(https://i.postimg.cc/15b7pjR7/unnamed.jpg) (https://postimages.org/)
;D
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Honestly, you guys. Where is the trust? ;D
Most of these pictures were taken last fall when I got the cars home. The dyno pics were taken at the beginning of May
(https://fepower.net/Photos/Posts/2 Boss Cars.jpg)
(https://fepower.net/Photos/Posts/KK1729 Left Side.jpg)
(https://fepower.net/Photos/Posts/KK1729 Right Side.jpg)
(https://fepower.net/Photos/Posts/KK1820 Left Side.jpg)
(https://fepower.net/Photos/Posts/KK1820 Right Side.jpg)
(https://fepower.net/Photos/Posts/KK1820 Engine.jpg)
(https://fepower.net/Photos/Posts/Boss 429 Dyno 2.jpg)
(https://fepower.net/Photos/Posts/Boss 429 Dyno Results.jpg)
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To update on my end.
I made a bunch of small changes to the calibration so they should run better with his cam.
Also blueprinted the works.
Ran fine
https://www.facebook.com/share/v/daifwD4xKuzKVgFX/?mibextid=WC7FNe
No drama, adjusted fine.
Jay should just be able to set floats, mixture, idle speed, and be good to go.
Guess we will see.
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Oh and sorry if I let the Boss9 cat outta the bag Jay.
At least I posted it in the right forum, not like the Lykins fella showing us Clevelands we don’t wanna see 😂😂😂😂
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Wow, two Boss 429's! I think you did better in the long run, the GT sure didn't have much of a depreciation cycle but i'm guessing it won't go up too much more.
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The one is certainly a survivor! I would not even consider painting it. They are only original once, despite the engine being rebuilt. But it's not my car.
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Oh and sorry if I let the Boss9 cat outta the bag Jay.
At least I posted it in the right forum, not like the Lykins fella showing us Clevelands we don’t wanna see 😂😂😂😂
LMAO , yah don't be like that trouble maker Lykins guy
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I got Drew's carb installed and running over the weekend. Took it out for a test drive today and it works beautifully. Thanks Drew!
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Oh good, happy to hear.
I hate when these little details get ignored… simple parts, simple problems.
Let me know if I can help get it dialed in as you go, happy to help.
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Today I was looking for something else and stumbled across a 429 SCJ Stick D1ZF-9510-YA Holley I forgot I had. List number R-6127A, with the 6382 and 5672 metering blocks, rebuilt, complete.
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This is why I take all my carbs apart, even new out of the box. I've had to mill bodies to get them to lay flat on the baseplate without a gasket, found trash in the bowls, etc. I'm not talented enough to know the feed sizes but just cleaning the thing up makes sure you at least start out as close to factory spec as possible.