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TCARP1 09-01-2009, 06:32 PM I am going to a new motor, and it will be putting out considerably more HP's. So I will need to upgrade my C4, the motor will be in the 450-500 hp range. My c4 now is pretty stock, just red eagle clutches and kolene steels, and kevlar bands, with a TCI reverse manual valve body and a billet intermediate servo cover and servo. What else could be done to keep it alive?? broncolou 09-01-2009, 07:07 PM Awesome info http://www.fordmuscle.com/forums/c4-transmissions/416584-monster-c4-thread-text-edited-way-long-version2.html broncolou 09-02-2009, 04:11 AM Deep pan,oiling/pressure mods.input shaft,fwd drum,added/upgraded clutches/bands is all I have done and works pretty well. Been solid for all season. Need a good torque converter as well. HTH FF3PM 09-02-2009, 09:05 AM Get rid of the kevlar bands. Kevlar has a poor coefficient of friction so they will slip more than even a stock band sort of contradicting your "grabby" red eagle clutches. Only advantage kevlar has is high heat tolerance, but if you do not build excessive heat then that is a moot point. TCARP1 09-02-2009, 05:37 PM I have a deeper pan already, I plan on doing alot of desert racing in the near future:D fordnut77 09-03-2009, 12:37 AM If you are pushing that much HP and are going to race in the desert, I would seriously consider going to a C6. TCARP1 09-03-2009, 05:34 PM No room, its in a pretty small buggy that was built with the 302/C4 combo I have the "shorty" adapter too. I think the C4's can be built up pretty well though:mr-t: fordnut77 09-03-2009, 08:36 PM No room, its in a pretty small buggy that was built with the 302/C4 combo I have the "shorty" adapter too. I think the C4's can be built up pretty well though:mr-t: Copy that, thought it would be cheaper for you to go with a C6. Sounds like you are stuck with the C4. These guys can build you a tranny or just sell you some trick parts. http://www.culhaneracingtransmission.com/index.htm StoopidMonkey 09-03-2009, 11:40 PM Ill be going with Performance Automatic in my 408 power Mustang. They build a 1000hp capable C4, and back it with a lifetime warranty. You may want to look into them. www.performanceautomatic.com FORDTECHGURU 09-04-2009, 11:08 AM yep x2... i use pa stuff in my builds, based on what u have now, toss a planet kit and a input shaft in it, and keep on wheelin, with those adds to your combo, the trans should be good to 700 or so.... FORDTECHGURU 09-04-2009, 11:09 AM and keep the kevlar bands, red band wears to fast for your app... Mr.N 09-04-2009, 07:13 PM If you are pushing that much HP and are going to race in the desert, I would seriously consider going to a C6. You need to back that statement up... I've seen C4 stand behind 650-800 HP for a few years. C6's just suck power... fordnut77 09-06-2009, 12:22 AM You need to back that statement up... I've seen C4 stand behind 650-800 HP for a few years. C6's just suck power... Let me start by saying I am no expert. Yes the C4 can be built up to handle high HP numbers. I brought up the C6 because the OP said he would be doing some desert racing. Desert racing is all about durability. Desert racing puts very high shock loads on the drive line. Yes a C6 uses more horsepower, but the C6 has a stronger case than the C4. It also has stronger planetaries, servos and other parts. I would give up the additional 25 HP the C6 uses over C4 for the added durability. In this case a C6 will not fit into the application, so I guess it really doesn't matter anymore. JoshTurner 09-06-2009, 02:24 AM I didnt read any of the posts or all of the 1st post.... What do you need to know???...In my race truck(Mud bogger...73 bronco) Im running 450 to 500HP with a C-4... It is a reverse manual valvebody & was machiend out to fit extra cluches.... Has held up to 15+ years of 7grad 150 foot passes in the mud... http://img.photobucket.com/albums/v137/MUDDOG4X4/BOGGER/11-05-2004063507PM.jpg EDIT...Ya spelling might be bad Im drunk & dont care | |