C6 or C4
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Joined: May 2003
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C6 or C4
Hello , need some help. Some people told me that I ought to go with c4 instead c6 they said get rid of that heavy-weight, power-robbing C6 transmission, what do yall think? my motor is a week from being completed 460 30 over flat tops 1970 model heads I ported them myself, 1.76 exhaust 2.25 intake valves comp magnum 280 cam.It will need a 1000 above stock stall converter. headers, stealth intake, 750 holley maybe 850 well have to try 750 first.
Posting Guru
Joined: May 2003
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From: Thomson, GA
heh- good luck finding a big block c-4. Even a built C-4 would have troble handeling your mill. Go with the C-6 for sure. It only eats like 20 HP more, and will last MUCH longer. It will be alot easier to find the BB C6 than a BB C4
Lead Driver
Joined: Apr 2001
Posts: 6,175
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From: Texas
The extra horses and weight savings wuold cost more up front to get a C4 adapted and upgraded enough to handle the torque, and I think it would keep costing you every time you left the line.
They run C4s in some quick cars behind powerful motors, but then again, those are cars.
They run C4s in some quick cars behind powerful motors, but then again, those are cars.
Postmaster
Joined: Jun 2003
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From: shepherd
c6 on the bb for sure if it was a sb then the c4. you need all the power you could get if it was a 302 or something because the c6 takes about 40 mor horses to turn than the c6. it was an article on this site a while back ago.
Posting Guru
Joined: Dec 2001
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From: Lincoln USA
I'll cast my vote dor the C6. That 460 would eat a C4 for lunch then spit out the pieces. Find a good tranny shop , or ask for a reference from the local speed shop, then have a C6 built for what you want it to do.
Post Fiend
Joined: Feb 2000
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From: Brea CA
If you're worried about the frictional losses in the C6, when you get yours rebuilt have them put some torrington bearings in it instead.
That 460 will eat the C4 for lunch.
Barry
That 460 will eat the C4 for lunch.
Barry
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C6 it is
Thanks yall I guess C6 it will be.
What does the bearing do for the trans are they just better bearing?
What does the bearing do for the trans are they just better bearing?
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Post Fiend
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From: Brea CA
They are spherical roller bearings that replace the steel thrust washers. Less friction, heat and horsepower losses plus the tranny lasts longer. Some of the better aftermarket torque converters also use Torrington bearings instead of steel washers too.
Barry
Barry
Post Fiend
Joined: Jun 2003
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From: Black Hills of SD
From what I have read a C4 could probably be built to handle the 460 under average driving. WFO launches with sticky tires may put it to the limit. Besides they never made a C4 to bolt to a 460 so it would be trickey. They do have adaptors to bolt a 700 R-4 to anything. I know a guy that did his own and it worked fine with a fairly stock engine but after he pumped up the 460 a little he keeps blowing convertors. The C6 is the toughest and least expensive way to go.
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