This is something that I have thought about and searched a little, but found no real answer. Would a quick change rear end handle the rigors of drag racing? I haven't seen any quick change rears in any sort of drag racing, mostly circle track stuff, so something has to make it unattractive for the drags.
A quick search on google images shows lots of drag cars with quick changes...I know a couple local guys that run them with lots of hp... Jason.
Pretty common back in the old days ie up into the 60's. With the advent of super sticky slicks and big power in the 60s they faded away in the faster classes. The V-8 style was replaced by the Champ in the later years of the 50s. They were useful when a lot of tracks were not asphalt ,change the ratios to help limit tire spin etc.
One thread http://www.jalopyjournal.com/forum/showthread.php?t=281999&highlight=quickchange+strength another good one http://www.jalopyjournal.com/forum/showthread.php?t=53854&highlight=strength+quickchange There are several more, I used the criteria strength+quickchange
unless you have a lot of coin i'd go a champ, the v-8 ones were used and can hold decent power, but at 2000-2500 a pop, i'd go with a champ that you can build for 500-1500 instead, and can handle almost anything you can throw at them within reason. That said i still wouldnt put one between fat sticky's unless i could afford to replace it, but then again look at the abuse sprint guys give them
KEG...SON where do you think the QUICKCHANGE started. O YEA drag racers have used them for over 50 yrs. and there as strong as most rearends...POP.
Well, they certainly did NOT originate with drag racing. They were in use in circle track cars from late '30s. As far as strength is concerned, a V-8 style as originally conceived was no stronger than the stock banjo style rearend it replaced-think about it: Same ring & pinion and same axles. It wasn't until the champ style (based on the 3/4 ton Timken rearend) came along that superior strength showed up. Heaveir gears' axles , and full floating hubs.
I have a 1972 frankland qc,it is based on a 3/4 ton truck rear.I was told that a qc rear does not like shock ,as with a stick shift on the launch, never the less i have one,and plan to drag race it. my 2 cents
if you use what is called the 3/4 ton unit the axels will be the weak link.. they like to break at the drive flange or hub. plus its a lot of weight to move and robs a lot of power because of friction..
running a 9"ford is a better plan, the main reason for a quick change was to make fast gear changes when you go from track to track on oval tracks, they rob horsepower and i would not want to trust one in a car that would really hook up.
I pulled mine out of a SCCA Roadrace car and pounded the absolute living F$#K out of mine for 26,000 miles... no issues...
The 3/4 Ton (Timkin) based QC has the brass thrust plate attached to the left side bell to limit crown gear deflection. This feature alone allows the Champ QC to be less problematic than the V8 version, which omits this vital component.
FAIRFAX...I stand corrected, but my first time to see a quickchang was in the 50s. and when i speak of strength, i'am talking about today's units, like WINTER'S products...POP.
Winters V/8 around 500 hp safely, Champ, I think they say 7-800hp? I like a 9 inch better on the strip as it consumes less HP. Anyway that's what the big dogs say!
Hahaha... I forgot to tell you that the church was located in the middle of an Endurance Test Facility commonly known as the Pari - Dakar! In other words... if I can't break it... you know it'll last a long time!
Schiefer QC was designed for drag race and road race cars. I have one waiting to go into my next project. 35 spline spool and axles. It lived in a drag car for over20 years.
Depends on your definition of Drag Racing. They were able to use quick change rears in the old days when they used to smoke the tires for the entire quarter mile and engines had less suds. If you mean serious drag racing with 15 inch wide slicks, transbrake, and a big motor quick change will blow to pieces - even the heavier duty modern stuff. But if you don't have a heavy car and use street tires it will last a good while. Sure does look good...better than any Ford nine-inch.
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