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Old 06-19-2012, 08:45 PM   #1
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transmission

Three speed transmission. C-4 for $250. The Guy doesn't know what year it is. Would it be a good transmission for a track car?
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Old 06-19-2012, 09:09 PM   #2
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Yes. They need built once you get some good hp though.
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Old 06-19-2012, 09:34 PM   #3
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Does the c-4 have overdrive? And if so how hard is it to hook into the computer. Or could I not connect it and go three gears.
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Old 06-19-2012, 09:36 PM   #4
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what vehicle do you have?

no it doesnt have overdrive. which is why it isnt the best for a dd, but will still work. it will just sacrifice some mpgs.
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Old 06-19-2012, 09:39 PM   #5
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Its a 84 mustang. I have a t-5 now but stick takes to much time when you're on the quarter mile.

---------- Post added at 10:39 PM ---------- Previous post was at 10:39 PM ----------

So I wanted to go automatic. I'm just going with a straight drag car on a budget.
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Old 06-19-2012, 09:41 PM   #6
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in a stock vehicle most people actually have better luck with the t5 honestly. until you get highly modified the t5 is probably gonna be faster. maybe not as consistent, but faster.
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Old 06-19-2012, 09:44 PM   #7
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I have pop up pistons, the 512 cam that you seen and bored 30 over. Ported heads and straight pipes. I believe that's it.

---------- Post added at 10:44 PM ---------- Previous post was at 10:43 PM ----------

Not sure what gears in it.
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Old 06-19-2012, 09:51 PM   #8
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ok. so you are trying to go faster in the 1/4?

what was your 60ft time? thats gonna tell the tail. im guessing with a 16.4 you spun badly?

something doesnt seem right with your setup. do your domed pistons have reliefs for the valves? with .512 lift and domed pistons, it seems like you would have clearance issues.

what intake are you running?

and im guessing your are still efi?

you can check your rear gear by : mark the tire and drive shaft. spin the tire one full/exact rotation and count exactly how many times the drive shaft rotates. that will be your gear ratio.
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Old 06-19-2012, 09:55 PM   #9
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She's carburated. Victor Jr. High rise intake. I took the heads off put some clay on the piston and put the heads back on and seen no marks after turning the crank two full times.
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Old 06-19-2012, 10:10 PM   #10
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She's carburated. Victor Jr. High rise intake. I took the heads off put some clay on the piston and put the heads back on and seen no marks after turning the crank two full times.
what kind of heads are they?

---------- Post added at 10:10 PM ---------- Previous post was at 09:56 PM ----------

I may have been mixing you up with another thread. Oops. If your a strictly drag car on a budget a c4 will work. I still wouldn't mind knowing those questions though.
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Old 06-19-2012, 10:13 PM   #11
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Not sure about the heads I have different numbers here. E5AE. And 5A1S. It may be a 8 at the end.
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Old 06-19-2012, 10:19 PM   #12
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Not sure about the heads I have different numbers here. E5AE. And 5A1S. It may be a 8 at the end.
i think those are 351 heads. even ported they maybe holding you back some imo. they are not any better than stock 302 heads.
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Old 06-19-2012, 10:24 PM   #13
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Should I stay t-5 or go c-4. I'm thinking of just running the car and seeing how it does then switch to the c-4 if I'm not happy with the time.
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Old 06-19-2012, 10:29 PM   #14
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i think kt depends on your goals. if it were me: i would pick up the trans and have it setup for racing. that is when you can afford to. and run the t5 untill ou have the c4 ready.
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Old 06-20-2012, 01:07 AM   #15
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Re: transmission

Stick with your T5, the auto trans is going to cost you some HP and it's going to be expensive to build.You'd be better off with the E7 heads than the E5's, but if you are going to change try to find a set of used aluminum heads that you can afford. A good set of aluminum heads can gain you 60-100 HP over what you have.
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Old 06-20-2012, 08:40 AM   #16
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Whats the difference between the stock 302 heads and what I have. The clearance?
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Old 06-20-2012, 09:12 AM   #17
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Check your local junk yards cause i just bought 96 explorer heads and upper and lower intakes for 125 dollars ... im hoping that helps my motor alot and HOPING it adds a little bit of power till i get my 351 all built and bought
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Old 06-20-2012, 09:31 AM   #18
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You have 351 heads. They flow similar to stock 302 heads(e7). But they have larger combustion chambers in them. What that does is lower your compression ratio, which means less hp. But that is probably the reason you have domed pistons, is to make up for the compression loss.

The thing that worried me about doing a head swap is piston to valve clearance. You will almost for sure not be able to fit gt40s with your pistons. If your heads are ported with bigger valves they will work for now. But I would contact trickflow and tell the guy what pistons you have and see if they have a head that works. The way the twisted wedge heads cumbustion chambers are, they have good clearance.

I have .516 lift and used about 3/16 - 1/4" of clay and never touched it with the trickflow heads. They would bump your hp up quite a bit. Even if they say they think it will work, which they might not even be able to tell you. You will still need to check piston to valve clearance again to be sure. Sorry to say but picking heads is gonna be tough with those pistons.
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Old 06-20-2012, 08:23 PM   #19
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Re: transmission

The Trick flow Twisted wedge heads reposition the valves in the head to center them better over the cylinder bore. They are the only heads I know of that will fit on a stock 5.0 and use a 2.02 intake valve that will not hit the piston in most cases.
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Old 06-20-2012, 08:34 PM   #20
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The Trick flow Twisted wedge heads reposition the valves in the head to center them better over the cylinder bore. They are the only heads I know of that will fit on a stock 5.0 and use a 2.02 intake valve that will not hit the piston in most cases.
That was my thought exactly. But I can't be positive how they work with the domed pistons. But I think that would be worth looking into over the 351 heads.
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Old 06-20-2012, 08:57 PM   #21
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Re: transmission

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That was my thought exactly. But I can't be positive how they work with the domed pistons. But I think that would be worth looking into over the 351 heads.
Domed pistons will probably have to be cut, but they claim to clear most stock pistons.
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Old 06-20-2012, 09:29 PM   #22
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I had clay on the piston and cranked her twice. Seen no marks and was about a 1/4 inch of clay. I don't want to spend $1500 on heads so for now I was going to stay with these heads and maybe go with a taller push rod. Maybe a 6.973 I believe it was.
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Old 06-20-2012, 10:59 PM   #23
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Re: transmission

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I had clay on the piston and cranked her twice. Seen no marks and was about a 1/4 inch of clay. I don't want to spend $1500 on heads so for now I was going to stay with these heads and maybe go with a taller push rod. Maybe a 6.973 I believe it was.
Be careful you don't collapse the springs and cause coil bind with a to long push rod.


Maybe find a cheaper used set if you can. You are leaving a lot of power on the table with those stock heads.
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Old 06-20-2012, 11:04 PM   #24
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If the Guy before me put a .512 cam in it he had to get different springs right?
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Old 06-20-2012, 11:16 PM   #25
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Re: transmission

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If the Guy before me put a .512 cam in it he had to get different springs right?
Not necessarily. You never know what someone else may have done.
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Old 06-21-2012, 07:28 AM   #26
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Not necessarily. You never know what someone else may have done.
Oh, come on. After 4 years of full rebuilding, I almost have previous owners figured out! Lol
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Old 06-21-2012, 07:35 AM   #27
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Lol how can i tell if my car already has a cam in it?
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Old 06-21-2012, 07:57 AM   #28
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Lol how can i tell if my car already has a cam in it?
You have to check lift with a dial indiacator. That should get you close then cross reference similar cams. You can also use a degree wheel when checking it to tell you duration.
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Old 06-21-2012, 08:09 AM   #29
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Yeah i dont have either of those lol is there any other way
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Old 06-21-2012, 08:21 AM   #30
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Not really. You can guess. I guess my and was right by making a exhaust video. And playing it at the same time as cammed YouTube videos.
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Old 06-21-2012, 08:27 AM   #31
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Re: transmission

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Oh, come on. After 4 years of full rebuilding, I almost have previous owners figured out! Lol
Yeah, expect the unexpected eh?
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Old 06-21-2012, 12:14 PM   #32
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Is their a certain order to put these lifters in. Or do I.just make sure the lifters are at their lowest point before tightening?
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Old 06-21-2012, 06:35 PM   #33
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Re: transmission

No order, just tighten them down as described in your Chiltons or Haynes manual.
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Old 06-21-2012, 07:16 PM   #34
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I thought you have to tighten them when the valve is fully closed.

---------- Post added at 08:16 PM ---------- Previous post was at 08:15 PM ----------

When I put the car together last time the lifters got eaten up. So I got new lifters and a new cam I just want to make sure I do it right.
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Old 06-21-2012, 07:22 PM   #35
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I thought you have to tighten them when the valve is fully closed.

---------- Post added at 08:16 PM ---------- Previous post was at 08:15 PM ----------

When I put the car together last time the lifters got eaten up. So I got new lifters and a new cam I just want to make sure I do it right.
you should tighten the rockers with the lifters down. if thats what your talking about.
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