People w/ C4's in here please

[BADASS03SVT]

looking for some info...as long as you are running the 2.47 first gear

weight?
rear gear?
power?
60?
et?

I just want to make sure the 2.47 is going to move my 3300lb car and still get me 1.4 60's.

[mrtbolt64]

3230
3.55
dunno
1.41
9.47

[grocerygeter]

on motor on 93 octane
close to 3100
4.10 gear
1.38 60 foot
9.59

hooked nos up stood it on the bumper once bugs out should be in the 8s
with a c-4

[BADASS03SVT]

Originally Posted by grocerygeter

on motor on 93 octane
close to 3100
4.10 gear
1.38 60 foot
9.59

hooked nos up stood it on the bumper once bugs out should be in the 8s
with a c-4

hmm..what tire? on the bottle Im prob close to your power w/ a lil more weight.

[grocerygeter]

dot 28 inch tall hoosier quick time pro
on motor i shift at 7k and go thru at 141 at 7300

[John91coupe]

weight = 3455 lbs
rear gear = 3.55
power = ?
60 = 1.43
et = 9.35

[trevnut]

2875
3.73
power dunno
1.26 best
9.244

[BADASS03SVT]

hmm..Im seeing a trend of mid to low 9 sec cars...lol....

what do you guys think??? is the 2.47 going to move my car??

[mgerman93]

3100
.430
344 rwhp
1.48
10.95

[FN RCKT]

Originally Posted by BADASS03SVT

hmm..Im seeing a trend of mid to low 9 sec cars...lol....

what do you guys think??? is the 2.47 going to move my car??

You have the Tq to get it going, I think it will. Plus you will loose some weight with the swap, along with some rotating mass. Won't be as nice on the interstate though.

Might think about a glide too. Especially if you intend on going faster. I know you probably think its nuts, but I've seen a bunch of 10.0 and high 9 second cars (even heavy cars) go from a C4 or T400 to a glide and run faster. It also tames the launch down a little. I'm about to ditch my 4R70 for a Glide. Only down side is you have to have a good converter guy, becuase the converter selection is critical.

[BADASS03SVT]

Originally Posted by mgerman93

3100
.430
344 rwhp
1.48
10.95

wow..great setup!!! very impressed

[BADASS03SVT]

Originally Posted by FN RCKT

You have the Tq to get it going, I think it will. Plus you will loose some weight with the swap, along with some rotating mass. Won't be as nice on the interstate though.

Might think about a glide too. Especially if you intend on going faster. I know you probably think its nuts, but I've seen a bunch of 10.0 and high 9 second cars (even heavy cars) go from a C4 or T400 to a glide and run faster. It also tames the launch down a little. I'm about to ditch my 4R70 for a Glide. Only down side is you have to have a good converter guy, becuase the converter selection is critical.

yea the car makes 470tq also right now through the 4r and peak tq w/ the roots blower is at 4100.

you think itll be ok? as long as I get a good converter? OFF the spray

i dont want to lose on the 60' and lose ET. if it stays where it is Ill be happy and gain some ET.

i don tthink I have enough power for a glide...maybe after a blower swap

[mrtbolt64]

If your over 3500lbs you may want to take a look at the TH400. 2nd word of advice, make sure you buy the tranny new. Do not buy someone elses junk.

As for converter you would be amazed with PTC and how cheap they are for a custom built converter.

[BADASS03SVT]

Originally Posted by mrtbolt64

If your over 3500lbs you may want to take a look at the TH400. 2nd word of advice, make sure you buy the tranny new. Do not buy someone elses junk.

As for converter you would be amazed with PTC and how cheap they are for a custom built converter.

no in race trim the car is 3350 w/ me as it sits...

[FN RCKT]

Originally Posted by BADASS03SVT

yea the car makes 470tq also right now through the 4r and peak tq w/ the roots blower is at 4100.

you think itll be ok? as long as I get a good converter? OFF the spray

i dont want to lose on the 60' and lose ET. if it stays where it is Ill be happy and gain some ET.

i don tthink I have enough power for a glide...maybe after a blower swap

Well, a buddy of mine in a full weight (+-3300lbs race weight) hatch just went from a C4 to a glide. His converter is too tight for him on the motor, and he lost 2 tenths on motor (from 10.90's to 11.10's). But on n2o, he picked up a tenth (going from a 10.05 to a 9.94) plus he picked up a mph. And thats with the first converter. should be faster once he gets it right. The reason I am switching is I plan on going much faster, and I don't think a C4 will hold up as well as a glide. C4's require lots of maintenance from what I've seen, even from the fully rollerized ones.

It would probably not work as well with you on motor. But on the bottle it would probably be fine. Bad thing about it, you have to set up the converter for what you intend on running. So a combo that works for n2o might not work very well on blower only. If you want to go much faster at your current weight, A C4 is going to have its hands full.

I've allways hated glides in street cars to be honest, but now that I've been around them a little more, I realize why lots of people run them.

[grocerygeter]

knock on wood ive had my c-4 for over 2 years and not one issue ive ran 9s the whole time beating the piss out of it and driving all over town
i rarely use my transbrake mainly footbrake the car

[FN RCKT]

Grocerygeter, Whats your weight?

[tinman4708]

I don't think you should have a problem with 1.4's...I've been 1.33 clicking the beam with the back tires. My race weight is 3600...3.55 gears...28" tire.

[NiteRida]

3150 race weight.
Times in signature.

Getting the right converter is the most important thing.

[grocerygeter]

Originally Posted by FN RCKT

Grocerygeter, Whats your weight?

almost 3100,power windows,locks t-top car full interior

[FN RCKT]

Originally Posted by grocerygeter

almost 3100,power windows,locks t-top car full interior

Nice!

[grocerygeter]

thx
heres a couple vids and timeslips
the wheelies the first time on the nos the other vids are on motor
http://s220.photobucket.com/albums/d...eelie_0001.flv
http://s220.photobucket.com/albums/d...t=100_2698.flv
http://s220.photobucket.com/albums/d...t=100_2381.flv

[BADASS03SVT]

Originally Posted by FN RCKT

Well, a buddy of mine in a full weight (+-3300lbs race weight) hatch just went from a C4 to a glide. His converter is too tight for him on the motor, and he lost 2 tenths on motor (from 10.90's to 11.10's). But on n2o, he picked up a tenth (going from a 10.05 to a 9.94) plus he picked up a mph. And thats with the first converter. should be faster once he gets it right. The reason I am switching is I plan on going much faster, and I don't think a C4 will hold up as well as a glide. C4's require lots of maintenance from what I've seen, even from the fully rollerized ones.

It would probably not work as well with you on motor. But on the bottle it would probably be fine. Bad thing about it, you have to set up the converter for what you intend on running. So a combo that works for n2o might not work very well on blower only. If you want to go much faster at your current weight, A C4 is going to have its hands full.

I've allways hated glides in street cars to be honest, but now that I've been around them a little more, I realize why lots of people run them.

thats the thing...the n2o Im just playing around with right now. Im mainly concerned with the motor ET's. its still a stock untouched longblock and I want to take it as far as I can this year. so I dont want to lose anything on the motor passes.

I guess its looking more like stock with the 4r one more year...I still think 1st gear is way too short though. it comes so fast sometimes I go over my shift points...and on the bottle its nuts....I bet 50 feet Im tapping the shifter.

maybe Ill just try a set of 3.90s to gain a couple hundred rpms leeway...I just dont know if Ill lose anything on the upshifts w/ the lower rpm drop.

[FN RCKT]

Originally Posted by BADASS03SVT

maybe Ill just try a set of 3.90s to gain a couple hundred rpms leeway...I just dont know if Ill lose anything on the upshifts w/ the lower rpm drop.

Yea, if you want to push your stock longblock and eaton (?) a little further, your probably going to need atleast 3 gears in your trans

Like you said, try the 3.90's. Thats a cheap swap comparitively. When I had my '03, I went from 4.30's to 3.73's and didn't loose any ET.

[mrtbolt64]

If your going to bump gear ratios I would go down to a 3.55.

Going threw 1st gear on mine i will short shift it at 55, 2nd to drive at 6k and cross the line 6400. When my car leaves the line it does not even pull the wheels off the ground.

[BADASS03SVT]

Originally Posted by FN RCKT

Yea, if you want to push your stock longblock and eaton (?) a little further, your probably going to need atleast 3 gears in your trans

Like you said, try the 3.90's. Thats a cheap swap comparitively. When I had my '03, I went from 4.30's to 3.73's and didn't loose any ET.

but whats going to happen on the upshifts? 4.10s to 3.73s is about a 600rpm drop in 3rd gear. wont the rpms be LOWER on each shift? right now I shift at 6400 and it drops to 5000....wont it be lower than that?? Im afraid of going to low and not having the car "pull" as good

[FN RCKT]

Originally Posted by BADASS03SVT

but whats going to happen on the upshifts? 4.10s to 3.73s is about a 600rpm drop in 3rd gear. wont the rpms be LOWER on each shift? right now I shift at 6400 and it drops to 5000....wont it be lower than that?? Im afraid of going to low and not having the car "pull" as good

No, the RPM drop will be exactly the same as it is now. The RPM drop is only affected by the trans gearing. Now, you will obviously be in first for a little bit longer, second will be longer also, and the motor will have to work a little more to pull against the steeper overall gearing, but the RPM drop will be exactly the same. It doesn't seem right, but when you work out the math, it is.

For instance, Your current trans has a 2.84- 1st gear, and a 1.55 second.

Using a 4.10 rear gear, a 28" tire, and lets say a 6500rpm shift point, you will be running about 46.5mph. Shifting into second will drop your RPM to 3546. Now, this is assuming no slip in the trans. Lets change the rear gear to a 3.55. With the same 2.84 first, and 6500rpm shift point, you will now be running 53.7mph, and when you shift it will drop to exactly 3546. There is no change because you are moving faster when you shift, and the trans is changing the gearing the same percentage. The RPM drop would be the same, whether your running 5.13's or 2.73's.

[FN RCKT]

Ohh, another way to figure out RPM drop, take your first gear, and devide that by your second gear. 2.84/1.55= 1.8322. Then take that number, and devide your RPM by it, and you will get your RPM drop, again, assuming no slippage in the trans. so again, lets use 6500/1.8322 = 3547 (my math up top was not as precise)

You can use this on the second to third drop as well, but deviding 1.55 into 1.0 and then deviding your RPM by 1.55.

[BADASS03SVT]

great info!!!!

hmm...maybe if I do the c4 Ill go w/ the 2.75 first gear...I dunno now...

[trevnut]

just use the stock 1st in the c4 it should be fine. it looks from your sig the best 60' you have ever got on the hose was while you were spinning. take care of the tire spin and see what the 60' does then determine if you need a taller first gear.

[BADASS03SVT]

Originally Posted by trevnut

just use the stock 1st in the c4 it should be fine. it looks from your sig the best 60' you have ever got on the hose was while you were spinning. take care of the tire spin and see what the 60' does then determine if you need a taller first gear.

it was a cold night (30 degree's) and track wasnt there..I have been 1.43 on the bottle. I dunno if anyone has watched the vids but these are the most recent in car ones.

http://videos.streetfire.net/video/J...oes_187649.htm

[grocerygeter]

Originally Posted by BADASS03SVT

it was a cold night (30 degree's) and track wasnt there..I have been 1.43 on the bottle. I dunno if anyone has watched the vids but these are the most recent in car ones.

http://videos.streetfire.net/video/J...oes_187649.htm

nice vid

[BADASS03SVT]

Originally Posted by grocerygeter

nice vid

hows it look??? anything you would change??

[grocerygeter]

Originally Posted by BADASS03SVT

hows it look??? anything you would change??

i cant tell you that from inside view you have to have someone video it from outside and see wht the rear is doing,im a little weak on suspension myself i can give you a idea,i have fooled with mine ,and then i had TRZ work on it to and got me alittle more 60 foot

[nosstang90]

Originally Posted by grocerygeter

nice vid

hey Brian...got any in car vids of your besides the "drive to the track vid"? (this is blackfox)