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Mods: Trick aluminum valve covers, fancy dancy extra thick spark plug wires, and some redneck glass packs. 9.22@147 3245lbs and shifting at 6400 on a 275/60/15
The dump truck making a pass http://s205.photobucket.com/albums/bb37/98grdpoundr/?action=view¤t=chad936144.flv
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79 black coupe -R.I.P.- 377/c4 with a lil N2O 9.244@143.44 thanks BASELINE SUSPENSIONS
89 coupe 10.27@130.37 Baseline Suspensions equipped
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.
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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
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Silver '03 Cobra Coupe Auto
9.94@135 w/a 1.36 - Eaton only, NO nitrous!
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.
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Mods: Trick aluminum valve covers, fancy dancy extra thick spark plug wires, and some redneck glass packs. 9.22@147 3245lbs and shifting at 6400 on a 275/60/15
The dump truck making a pass http://s205.photobucket.com/albums/bb37/98grdpoundr/?action=view¤t=chad936144.flv
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.
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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
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one of the fastest all motor smallblocks on pumpgas
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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.
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347 KENNEBELL 2.2 9.54@141.17 3600lbs MODULAR DEPOT tunedhttp://www.youtube.com/watch?v=DT_1U1NH9WI 1990 fox Gt-40's TF ST 1 306H 330T 11.83@114.69
almost 3100,power windows,locks t-top car full interior
Nice!
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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.
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Silver '03 Cobra Coupe Auto
9.94@135 w/a 1.36 - Eaton only, NO nitrous!
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.
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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.
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Mods: Trick aluminum valve covers, fancy dancy extra thick spark plug wires, and some redneck glass packs. 9.22@147 3245lbs and shifting at 6400 on a 275/60/15
The dump truck making a pass http://s205.photobucket.com/albums/bb37/98grdpoundr/?action=view¤t=chad936144.flv
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
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Silver '03 Cobra Coupe Auto
9.94@135 w/a 1.36 - Eaton only, NO nitrous!
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.
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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.
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1993 Coupe Street car with full interior and no cage has run a 1.40-60' with a best 1/4 of 10.12@133mph. On ET Street Radials
"Life is tough. Its even tougher when you're stupid" -John Wayne
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.
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79 black coupe -R.I.P.- 377/c4 with a lil N2O 9.244@143.44 thanks BASELINE SUSPENSIONS
89 coupe 10.27@130.37 Baseline Suspensions equipped
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.
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.
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
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one of the fastest all motor smallblocks on pumpgas