Truth Posted December 20, 2003 Report Share Posted December 20, 2003 since my friend with his 97 Mustang GT got those 3.73 gears, and i saw how much of a difference it made, i have contemplated buying some 3.90's for my quest. the only thing i have a problem with is availability, and what rpms will i be running doing about 60mph? Link to comment Share on other sites More sharing options...
Shelby Posted December 20, 2003 Report Share Posted December 20, 2003 now UL if you follow the same reasoning with say mods like you have done, the diff is further enhance'd , one thing to keep in mind along with the lower top rpm/spd is the time need'd to abtain that rpm,, you will have less time during each gear shift for the engine to work, so the importance of the engine tune'd state becomes more and more important ,as will the time to actualy make those shifts , thus with realy low rear gears it is almost a must to go to an auto car so the shift time is reduce'd , we're not machines and doing the same perfict shift time and time again is some thing not many can do , now of course road raceing and ralley raceing are a diff thing entirely , here guys like the choice of haveing more gears to chose from now changeing out the rear gearing is not something for every one,it is only for the serious racers ,if mpg is of intrest to you don't even think about it, unless you want to do a swap of diff in and out for a special event Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 20, 2003 Report Share Posted December 20, 2003 Agreed, I certainly won't be putting the 4.22's in my car, the powerband is only from 3-5K. My ultimate goal is a 13.5 ET, and I believe wholeheartedly that a Super 16G and 3.90's will get me there. Link to comment Share on other sites More sharing options...
long4boost Posted December 20, 2003 Report Share Posted December 20, 2003 SIGN ME UP! dude im all about quick accerlation, really top speed does nothing for me at all, acutly to be quite honest it scares the shizzle out of me, for what can happen, and how fast it can happen. So tell me you smart a** mofo ul (not meant darogatory, meant meaning that your freakin smart) where would one go to get something like this. and then could i use my stock diff, and just change out the that gear? Because i could swap a diff out in a few hours (done it enough hehe) and after christmas i will have the right tools so doing something like that wouldnt take long for ME, but for others it might take more time.. sooo where would i get one? and then just one other question, say @80 in 5th would would my curzing rpms be? peace ted Link to comment Share on other sites More sharing options...
Boosted_One Posted December 20, 2003 Report Share Posted December 20, 2003 . My ultimate goal is a 13.5 ET, and I believe wholeheartedly that a Super 16G and 3.90's will get me there. I agree on that one! My goal is to hit mid 12's on street tires. ;D Link to comment Share on other sites More sharing options...
Lizzord30 Posted December 20, 2003 Report Share Posted December 20, 2003 Agreed, I certainly won't be putting the 4.22's in my car, the powerband is only from 3-5K. My ultimate goal is a 13.5 ET, and I believe wholeheartedly that a Super 16G and 3.90's will get me there. If nick can get constint 13.6's on Small 16g and stock gears (i think he would get at lest a 13.5 now with the head ported and HD springs). I hope you can get 13.5 with a larger turbo and gears. Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 21, 2003 Report Share Posted December 21, 2003 Ted: I'm checkin' on that right now, at the moment you can get them HERE for $510, but if I can find out exactly what to look for in the Junk Yard that'd be a LOT cheaper ;D. Luke: I didn't know Nick's times with mods, thanks for tellin' me . All I know is that it gets harder and harder to shave time the faster you get, and I'm not looking to kill my car, just enhance it. If I run a low 13 I'm be more than happy, all I'm looking for is 13.5. Link to comment Share on other sites More sharing options...
Technology Posted December 21, 2003 Report Share Posted December 21, 2003 i'm looking for 11's ...mid 11's. that'd be pretty nice. i could own pretty much anyone. Link to comment Share on other sites More sharing options...
Ratmtattat Posted December 21, 2003 Report Share Posted December 21, 2003 I remember talking with Shelby about this a long while back and wondering why no one was doing this, since it has the ability to enchance the accleration of the car to a greater degree than almost anything. But now you guys are making me so happy that you're going to do it. Maybe a kit will come out eventually and even a poor college kid like me can even afford it. Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 21, 2003 Report Share Posted December 21, 2003 We already know the part # (MB185461), now all we have to find out is exactly what to look for when we go to the junk yards and we're set, I don't think this is an expensive endeavor Jason. Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 21, 2003 Report Share Posted December 21, 2003 Edit. Link to comment Share on other sites More sharing options...
Shelby Posted December 21, 2003 Report Share Posted December 21, 2003 in most cases the use of a set of 3:90 gear will give the average guy a lower ET , esp if he goes to the track with his every day tires , any gain in the last half of the track will be ate up from wheel spin ,at the first 60 ft , all these coments about my 1st and 2'd gear are useless due to wheel spin, if you haven't figure'd it out yet it's your tires not the fact you have 400 hp ,the car weigths 3k lbs that more then enought to get traction with a good set of tires , one ride arround the block in drag radials and all that wheel spining crap will be gone you'l think some one detune'd your pride and joy while you weren't looking , or you may be looking for the rest of the drive shaft pieces hehe gear ratio playing is just like every thing else, doing one thing may mean the need to do some thing else , like valve springs, it'l be a manditory fact they will have to be in good shape , cause that 5or6k rpm will be there faster then it is now , UL you say the 1-2 shift will be with in the 60 ft,, one thing your not counting on is the fact that with out wheel spin the launch is at a much lower rpm then when the tires are spining and going no where , so you guys thinking about this gear swap be prepair'd to buy drag tires of some type , you every day tires are gona be useless , that is if you realy want to see the advantage of what they can do for you , the higher the number the more tire you'l need you auto guys will love the gear swap tho more so then the 5 spd guys for you the add'd tourqe off the line under boost will realy kick it in the rear ,with the proper tire 's , speaking of the auto's we're gona have to have some one get to work on a stage'd boost controler to limet the boost untill after the 1-2 shift , one that will do it on it's own the next yr or two, we can realy be in for some fun Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 21, 2003 Report Share Posted December 21, 2003 Shelby, I was actually talking about the 0-60 MPH bracket, not 60 ft . And do I sense another chance at a shameless plug for the mighty Yoko's? http://gallery.s2ki.com/imagecatalog/imageview/67833/ Ah, I feel much better ;D. Trust me, I'll make good use of the 3.90's ;D. Link to comment Share on other sites More sharing options...
Shelby Posted December 21, 2003 Report Share Posted December 21, 2003 ;D ;D ;D ;D ;D ;D yepper's good time for a pic oh and 60 ft , 0 to 60 mph don't you think they relate to each other clock is running on both right Link to comment Share on other sites More sharing options...
chiplee1 Posted December 22, 2003 Report Share Posted December 22, 2003 Changing to the 3.90 gears will require 2 shifts to 60, which will most certainly eat away at their theoretical .7 advantage, but they should still make the car quicker in the 8th and the ¼. . it already required two shifts to 60 unless you're driving some hybrid. But if you were actually talking about 60ft when you posted that I'd have suggested launching in 2nd, which I may try with the stock rear gears. Link to comment Share on other sites More sharing options...
Boosted_One Posted December 22, 2003 Report Share Posted December 22, 2003  all these coments about  my 1st and 2'd gear are useless  due to wheel spin, if you haven't figure'd it out yet it's your tires not  the fact  you have  400 hp ,the car weigths 3k lbs that more then enought  to get traction with a good set of tires , one  ride arround the  block in drag radials and  all that  wheel spining  crap will be  gone you'l think some  one detune'd  your  pride and  joy while you weren't looking , or you may be looking for the rest of the drive shaft pieces  hehe I've found since I swapped to the larger turbo in I have a lot more 1st gear. I seem to get a little more load on in 1st gear. Positive byproduct? Perhaps. Link to comment Share on other sites More sharing options...
Shelby Posted December 22, 2003 Report Share Posted December 22, 2003 Chip,, hehe last few guys that try'd 2"d gear lauchs are still bicking up pieces and parts Link to comment Share on other sites More sharing options...
chiplee1 Posted December 22, 2003 Report Share Posted December 22, 2003 Chip,, hehe  last  few guys that try'd 2"d gear lauchs are still bicking up pieces and parts  comes highly recommended from several experienced racers locally. Desktop dyno says it's the only way my car will see even a high 12 second pass. 2nd gear launch was a full .7 sec faster in the quarter than the 1st gear launch. If your recommendation is against it I'll take that under serious consideration, as I'm not really interested in breaking, but I was under the impression it was rather common. And with the 3.90 gears it shouldn't be as hard on parts. Link to comment Share on other sites More sharing options...
Shelby Posted December 22, 2003 Report Share Posted December 22, 2003 the 2'd gear is a 2:08 , a better bet would be an older D50 with a 2:36 1st , all the gears are a bit taller even 5 th, may not last long with the power you're puting out tho , but should hold for a few runs , ours is a 3:36 1 st , with the old tranny i could almost get 60 mph out of it in 1st with the 3:54 rears Link to comment Share on other sites More sharing options...
jinx Posted December 22, 2003 Report Share Posted December 22, 2003 I wouldn't get rid of my 3.54 stock gears, especially for a moded car. Its much easier (and cheaper) to try a shorter, smaller diameter tire and test it at the strip before commiting to a 3.90 or higher. Once you have considerably more torque available, 3.54 are fine imo. I remember a handful of GN clubmembers brought over those traditional hot rod practices and swapped out their 3.42s for shorter gears. Sure the car 'felt' more responsive, but guess what happened to their ET? Turbos love load Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 22, 2003 Report Share Posted December 22, 2003 it already required two shifts to 60 unless you're driving some hybrid. Â But if you were actually talking about 60ft when you posted that I'd have suggested launching in 2nd, which I may try with the stock rear gears. ???, terminal speed in 2nd is 61 mph, and although that's at 6K and the power leaves at 5K, 60 mph still only requires 1 shift. Link to comment Share on other sites More sharing options...
chiplee1 Posted December 22, 2003 Report Share Posted December 22, 2003 ???, terminal speed in 2nd is 61 mph, and although that's at 6K and the power leaves at 5K, 60 mph still only requires 1 shift. oh you're right, I was thinking two gears. I took what you said to mean that with 3.90s you'd have to shift into 2nd to get to 60mph, but with 3.54s you wouldn't. That explains alot, as I was starting to wonder about you thinking you could get 60mph out of first gear. Good post by the way, on the original topic start. Link to comment Share on other sites More sharing options...
artinist Posted December 22, 2003 Report Share Posted December 22, 2003 guys, part number MB185461 is replaced by MR325565 $393.58 according to mitsubishi. i also heard back from Bill and he said that the gear info on his website is 3 years old and the pricing is off. he is charging $250 labor plus parts. parts being> gears, seals and bearings if necessary. as for used gears, i took a trip down to the junkyard yesterday and started looking around. seems like the trucks with G54 engines have a 3.54 gears like a stock starion. its is the 4G63 engine trucks that seem to have the 3.90s, one thing that was anoying is that the D50s have a plate under the hood that just says mitsubishi motors and no info no gears, so i was only able to find out about the gears on mitsu truck that have that info on that plate. does anyone know how to find the gear info on the D50? i plan to pull a set of gears out a mitsu truck this saturday. if this works, then there is plenty of used gears to go around. Link to comment Share on other sites More sharing options...
UltimateLurker Posted December 22, 2003 Report Share Posted December 22, 2003 Excellent work Art! Link to comment Share on other sites More sharing options...
heefner Posted December 22, 2003 Report Share Posted December 22, 2003 a lot of good points brought up on this post. Art, I know some american cars and truck would have gear ratios stamped right on the rear. Any chance the Japan did that also? As for 3.90's shaving a bunch of time off in the 1/4, it might not look as good on the track as it does on paper. Some of you guys shifting around 5200 and 5500 may have to go into 5th befor the traps which will cost you a few tenths. Chip, I honeslty haven't tried launching in 2nd but I would think that would put a lot of ware and tare on the clutch in order to get the boost up enough to not bog off the line. I may have to experiment a little to see how it works. Link to comment Share on other sites More sharing options...
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