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2carb40

1955 Century Mod

12 posts in this topic

Want to put a 56 left side dual exhaust manifold on my 55 century. Will it clear standard trans linkage on steering column? Any body tried it?

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The biggest problem I have seen is that there is no way to get pipes to the back of the car without cutting the frame. Next problem is avoiding the under seat brake booster.

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The biggest problem I have seen is that there is no way to get pipes to the back of the car without cutting the frame. Next problem is avoiding the under seat brake booster.

For a visual, it will dump about the same location as the right side manifold.  It has been done, but if it were easy we would all have duals :D

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I would talk to an exhaust shop and see if they can possibly take the same bends off the y pipe and create your true duel and see if they can run it a long side your existing exhaust and out the rear on both sides. Or get a single in dual out muffler and go that route maybe. If there is a will there is a way.

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I would talk to Waldron's Exhaust. They advertise '53 to '55 dual exhaust conversions. I am not familiar with '56's but bet they will know what is required. My dealings with them have been positive.

Gary

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Thanx for all the input. I'm almost ready to test my rotator cuff repair with regards lifting and tugging on wrenches. I'm really excited to get going on this car as I've collected some good stuff for upgrades and modification. Gotta keep my impatience in check so I don't rip things and have to start over on shoulder. Interesting the medical folks didn't say at the outset that getting back to full function would be 12 to 18 months! Details to follow.

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You will most likely need to relocate the master cylinder to do a full dual exhaust.

I did a single high flow exhaust on betty and I'm quite pleased with the results

My suggestion would be to split it in the back if you really desire the dual exhaust look.

Otherwise, you are going to do alot of work for no real gain, other than the look.

 

I'm doing a 56 convertible now. You can see that the master cylinder gets lifted to the cowl, then suddenly dual exhaust is simple. If you have the 56 parts they probably would go in fairly easy but its still a big project. The 56 also uses a rag joint on the steering column so you get alot more room to work with. I may just post some photos comparing the 56 to the 54. The 56 also has a better hood hinge setup, always fun to look at the year to year evolution of these cars.

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Posted (edited)

Way behind on virtually everything with the rotator cuff tear to right shoulder making me avoid the use of the arm like a lefty, only my left side is too weak and unco-ordinated to accomplish much! The slow down has had one positive effect; I reflected on my physical abilities and deciced the stick shift option is out. I drove one of my other Buicks, '39 with regular steering and stick and remembered how much pleasure the option of PS and automatic offer comparitively! I have a 56 Century Dynaflow that operated without leaks. Buick engineered an extra stator into the torque convertor which provide for more efficient operation and quicker take-off from standing start. The bellhousing became an inch deeper, increasing overal length by the same amount compared with Special/Century Dynaflows.Super/Roadmaster dynaflows have an inch longer tailshaft from the factory, so are the same length as all models of '56s. My plan at this point is to install the '56 Century Dynaflow in my '55 Century by romoving the outer tube from the '55 Century driveshaft torque tube and have the driveline company cut it one inch shorter, then use my cutoof wheel to cut an inch fom the front spline on the inner shaft, therby accommodating the extra inch of the '56 Dynafow. Research has indicaded that all exterior mechanical controls are the same '55-'56 on these transmissions, the control differences done with internal circuitry only, indicating outside link should work as is excepting '56 linkage rods will prolley need to be used to accommadate one inch longer length. My Hollander interchange manual stated in the trans interchange section," if you can find a 56 transmission use it instead, as it is far superior to the 55 as replacement!" Comments from anyone with experience or positve suggestions on techniques to do this are welcomed. For all the negative naysayers, the beatings will continue, haha!quote name="54fins" post="1418120" timestamp="1444936400"]You will most likely need to relocate the master cylinder to do a full dual exhaust.

I did a single high flow exhaust on betty and I'm quite pleased with the results

My suggestion would be to split it in the back if you really desire the dual exhaust look.

Otherwise, you are going to do alot of work for no real gain, other than the look.

I'm doing a 56 convertible now. You can see that the master cylinder gets lifted to the cowl, then suddenly dual exhaust is simple. If you have the 56 parts they probably would go in fairly easy but its still a big project. The 56 also uses a rag joint on the steering column so you get alot more room to work with. I may just post some photos comparing the 56 to the 54. The 56 also has a better hood hinge setup, always fun to look at the year to year evolution of these cars.

Edited by 2carb40 (see edit history)
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Wow! Time flies wether your having fun or not. Progress has been slooow, but it marches slowly on! Sharing pix of oil filter mod, which is '59-'60  adapter. Bolts right on with no leaks it angles slightly, which is actually a plus. Raising it very slightly and positioning it nicely away from interference. I like this one because I can use new style filter and less messy! All bolt-on. '56 trans all bolted in. Six way seat from 56 Olds 98 series 2 Dr ht purchased from Scott at Ellingsons car sales is same width as Century and a bolt-in as well! Stainless lined rebuilt master cylinder installed. Four new wheel cyls purchased from Jackson Auto and Machine in Duluth ready to install. Chrome strips for headliner trim in process. All side trim repaired and polished, but uninstalled. Missing door panels, but power window switches and forward side glass and chrome trim surround purchased, but uninstalled. Rears tested, fronts not, but regulators with motors attached, purchased from same 98 Olds. I think prolley only nine hundred ninty nine things left to do, so still some fun cut out 4 me! Whew! Details still to follow. 

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Greg, would love to see your oil filter adapter!

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Posted (edited)

20 hours ago, Beemon said:

Greg, would love to see your oil filter adapter!

See above edit. Took my pass ex manifold off, so I had a better angle for photo. Ordered new stainless crossover from Waldrons in MI today. Forgot how stubborn ex bolts and nuts can be!

20170421_180602.jpg

Edited by 2carb40 (see edit history)
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