c4 vs 5 speed...my on going debate
03-25-2011, 01:57 PM
#1
2nd Gear Member
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Join Date: Dec 2007
Location: ny
Posts: 404
c4 vs 5 speed...my on going debate
i just can't decide if i want to go the quick easy and cheaper route by rebuilding my c4. im building a 408 for the car and i beefed up c4 with a nice stall speed and a valve body would be nice, but i keep thinking 5 speed. only problem is modern driveline quoted me 4400 for a tko600. its pointless for me to go t5, ill blow it up in a week. i want those 4.10s too, but if i go c4 ill need 3.73s to be able to go on the highway. what do you guys think? build my c4? or spend 4400 on a 5speed kit. money is an issue, so id have to save up for a while for that 5speed also...
03-25-2011, 04:54 PM
#4
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Join Date: Oct 2009
Location: Florida
Posts: 429
What kind of driving do you do? Does it make sense to build for that one trip per year to the strip, or the other 364 days?
I'd argue a T5 would do fine IF you don't drive it like you want to break it. So the question comes back to this: If you drive your car hard, then the C4 will have built in insurance to survive your aggressive driving. If you dial yourself back some, the T5 will work fine. I realize everyone is different, but for me, I like moving up through the gears, and that is more important to me than squeezing that last 10th of a second.
Can you break the T5 with your 408? Yes. Do you have to? No.
I'd argue a T5 would do fine IF you don't drive it like you want to break it. So the question comes back to this: If you drive your car hard, then the C4 will have built in insurance to survive your aggressive driving. If you dial yourself back some, the T5 will work fine. I realize everyone is different, but for me, I like moving up through the gears, and that is more important to me than squeezing that last 10th of a second.
Can you break the T5 with your 408? Yes. Do you have to? No.
03-25-2011, 07:59 PM
#5
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Join Date: Dec 2007
Location: ny
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its going to be a street car, not a track car. I honestly dont even have plans right now to bring it to the track. however, i do want it to be a mean street car. i would be lying to myself if i said id drive it with ease and make a t-5 last. im not saying ill beat on it all day, but if i had a t5, there would definitely be some stabbing of the gas and dropping the clutch here and there and i just dont want to worry about grenading it. im more concerned with the overdrive. if i run 4.10s witha c4 and a 28inch drag radial ill be around 2800rpms at 55mph. do u guys think this would get annoying on the highway, and can i even run a 28inch drag radial on a 67 coupe with no fabrication?
03-25-2011, 10:03 PM
#7
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Join Date: Feb 2006
Location: So. Cal,the O.C.
Posts: 1,538
i had a c4 and went to a 5 speed and im considering going back to a c4.Going through the gears is fun at times and the overdrive is nice, but a auto would be easier on the left leg.Also anything deeper then a 3.55 will wear you out getting passed on the freeway.
03-26-2011, 03:31 AM
#9
3rd Gear Member
Join Date: Nov 2008
Location: cyprus
Posts: 518
I had the same dilemma as you buddy and instead I got myself an AOD as andrew said. I havent installed it yet, have it laying next to my stang on the garage floor. Im hoping I open the garage one day and find it miraculously installed on its own.
03-26-2011, 05:28 PM
#10
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Join Date: Dec 2007
Location: ny
Posts: 404
i've thought about a beefed up AOD but isn't it expensive for the conversion kit? I thought they didn't just bolt right into the car and some modifications had to be made. noroof66...how high are your rpms at 60 on the highway? 3.55 is a nice gear, but if im making peak power at a higher rpm (I.E. 6,000rpm), won't i need a lower gear to get me up there? (3.73 or 4.10).