apex_sideway

Would this be a good idea? I kinda like the automatic with traffic and this will be my DD for about 2 more years. I don't like the "rats nest". I also don't want to have to get a aftermarket ECU because i enjoy the cars Hold Mode. I'm not trying to go any faster and i'm happy at 10psi of boost. If anyone has done this let me know how it went: Is getting the car going really "that bad"; how's the drivability, how's gas mileage, etc.



Thanks,

C.T.

FikseRxSeven

i dont know how your transmission computer will accept the increase in revs with the increased gearing.



your gas milage will suck even worse for sure because of the change in revs, but your car will sure accelerate faster

apex_sideway

I know alot of auto owners do the 4.33 gears and don't have any problems with it (besides the speedo being off). I've read into it and no one has regreted it.

herblenny

I'm going to be little critical here..



1. If you don't like the rats nest and don't want an ECU.. you don't have much options.. and this is also with Manual FD.. Unless you want to splice in resistors and such..



2. Why would you want 4.33?? First, you do know how much it costs? Unless you have the parts cheap and willing to drop and do all the work yourself, I don't think its worth it so that you might get slightly faster acceleration.



3. If you are satisfied of owning an auto and its power... and there is no problem with it, Just keep it how it is and enjoy the drive.

apex_sideway

1. From what i understand keeping the car around 10psi you won't need a ECU.



2. From what i've heard it's about $1000-1500 and that's not that bad. The 4.33 gear would help out with the auto lag combined with the non-sequential.



3. The non-sequential isn't a power mod for me. The Non-sequential mod is for reducing the 100 points of failure in the sequential turbo system (i belive there's about 50 hoses down there).



Any more input is appercated. Thanks for those who responded. I don't mind any critical input as long as it's helpful.

Sivart_R1

Just like to point out that this isn't always the case. If you can get the 10psi more efficiently (ie. cooler intake air charge) you run the risk of running lean as well. I also note in your sig that you have intake, intercooler, downpipe, and cat-back, but running stock ecu. You're running the edge of what the stock ecu can handle already.



Taking the 1100-1500 you're looking at spending on the diff may be better used on picking up a power FC or similar...could save you at least double that down the road.

apex_sideway

I never heard of the car leaning out at 10psi; that's pretty interesting. I know that i'm pushing the limit as far as mods go on the rx7 without a ECU but Pettit assured me it was okay. I even asked them if i needed a boost controller and they assured me i didn't as long as i wasn't playing boy racer all the time. If i get a aftermarket ECU i'll lose the hold feature and i like to have it when trying to merge into heavy traffic or whenever i need it.

teamrj83

get a downpipe, leave the stock midpipe and keep the 10psi, then add a pfc and then you wont need the gears, you will prob gain near 20hp just doing that and your acceleration would be a lot better and you would spend less than 1500 dollars... and if you need a ecu i have a pfc and commander for sale for 600 bones!!!

herblenny

Again, As stated before, if you eliminate your rats nest, you would have to put resistors and such to use Stock ECU! Also, I don't have an AUTO and never done non-seq with auto car.. Even for manual, you need an aftermarket ECU to go non-seq as stock ecu relies on other solenoids for seq. system.. Learn about how the car works and you will realize what you've heard might be wrong!



Also, I never said anything about not able to run 10psi.. your car will just go into a limp mode as ECU gets feed back from all your solenoids and such. Its in your factory service manual about how solenoids are connected to the ECU.



If you think ECU and such isn't necessary and you think I'm wrong, just go do what you wish to do.. I personally think its a waste of money to put 4.33 gearing.. unless you are some hardcore racer and needed for specific track you might benefit from it.. Otherwise, there are better ways for you to spend that money.. But hey, its your money and time..



And regarding non seq cars.. do you know what it takes to do non-seq? have you riden in a non-seq stock turbo cars? Again, do some research about them and think really really hard and see if what you wanting to do with 4.33 and non seq turbo make sense to you or not.. because it doesnt to me..

fddriver02

Isn't the tranny controlled by a separate ECU? If not then get a piggy back ECU so you don't lose the HOLD function or anything else.