ok so im in a 5AT and ive been researching how to make my transmission both more dependable as well as stronger. Im already familiar with torque converters as well as valve body upgrade. built gears would be more then ideal but my goal power range is 350hp so i don't think built gears would be needed...

Here is my main question: What mods or parts can be bought and used to actually relieve the transmission of some powertrain loss? i know we lose a good bit of power compared to the 6mt through our transmission and wonder what can be done to help out the 5AT.

 

Just buy a 6mt and be done with it.

 

no im good. really too much work now. plus sucks in traffic which there is plenty of around my city. also 5AT is decent for boost cause u always have power down, im just looking for mods that will cut out some of the powertrain loss

 

seems like you answered your own question...i would say transgo valve body, torque converter, and FD swap up to 3.5 or 3.7 from your 3.3....you should be putting more down to the wheels and smoke a stock 6mt

 

ya just wasn't sure if there was anything else beneficial to relieve the powertrain loss within our trannys. im on g35driver more and there isn't a overwhelming source of info on that site i believe the pumpkin out of a g37 auto is 3.69 w/ lsd and that is the one i would like to get.

 

3.7 might be a bit much and if you're about convenience keep in mind you might lose functionality of your cruise control- though that's a very debated subject.

Also, my understanding is you need to mod the pumpkin slightly to make them fit- though of course guys even have DIYs on the subject.

Might be worth checking out the 3.5- since the 6MT guys who go boost quite often end up leaning towards our 3.3s. I was told that guys will swap them out with you right across the board... helps keep costs down and allows you to focus on sexier mods. Also less impact on other vehicle systems.

I stuck with my 3.3 because I had a feeling I was going FI pretty early on and I know 3.5 and 3.7 can be hard to manage in the first few gears. Quaife LSD is my next route but then again I'm anticipating some pretty big numbers and it's almost imperative to go that way.

I see you're shooting for the mid 300s or so- I may have missed it but I hope you're not planning on doing that with bolt ons while staying NA?

 

ok alot to cover there so im gonna answer your questions backwards , haha but no im aiming for 270 NA and then 350 once boosted.

yea that was my interest in the g37 pumpkin for both the lsd and gears, however i wasn't planning on really getting on the car in the low end, not a fan of just burning off tires

haha all the sexy mods are complete its just time to get this power to where i want it to be and my tranny dependable enough to maintain its strength while dealing with the added power

 

270 is lofty... I see you have Osiris in your near future. I'm not sure how much the 3.7 will add to your overall horsepower but I'm sure you've noticed a bunch of us running tuned DEs with HFC and catback exhausts of varying descriptions are running less than 250... significantly less than 250, in most cases. I think HRs could go there but we might not be as lucky with out DEs.

Osiris will help tighten things up for you so you lose less through the gears but again that might smooth out your power curves but I'm not sure it's going to get you to 270. Not hating, just saying. I think I rounded out at 224 / 214 tq with spacer, intake, HFC and catback (stillen). It was at midrange altitude (1500-2000 feet or so) and weather could have been better according to the guy doing the tune (more of an effect on NA)

I was also being tuned on COBB instead of Osiris- and the tuner was pretty new to that software though a very profficient tuner overall.

And additionally- even though we can get our rev limiter adjusted to 7200- the power curve plummets instead of increases.

I'd be careful investing too much money into mods to get you to 270 as much as I would starting to build up your tranny and mod list to accommodate the move to FI. I was given this same piece of advice and I'm glad I took it. Once I dropped a transgo kit in, it was like a whole new car- and while I know the kit doesn't have any real impact on how tightly the clutchpacks bind together... it drastically improved my overall experience with the car.

Numbers on the dyno are like evaluating your health with a mirror. A lot of it is going to be butt dyno and the feel of the car vs. what numbers are on a dyno sheet. Regardless of the mods you put into this car NA, there are SUVs and other relatively cheep stock cars that will embarass you on the line. Granted, I had 4 220+ guys in the car- but I had an accord at least keep up with me on at least one occasion... OUCH! And don't even remind me of the minivan with gaggle of children in the back. Hello FI.

Anyway... I won't be much help in explaining other more creative ways of putting power into the ground- but if it were me (and it was) I'd be investing in mods that will directly support FI... and then if you have any money left (assuming it goes smoothly- mine didn't hence I'm now a built block and built tranny)... then put the icing on the cake with your LSD / 3.7.

 

here are a couple threads about tuning posted by the actual tuner himself up at cin motorsports, awesome tuner who yeilds crazy gains. maybe the tuners around your area aren't familiar with tuning g35's as well which would give you a chart looking more like this : http://g35driver.com/forums/tuner-dy...5-t-coupe.html

now here are some charts posted by the actual tuner from cin motorsports
http://g35driver.com/forums/tuner-dy...-w-osiris.html

and one of their customers who hit 301 on simply bolt ons ( 6mt)
http://g35driver.com/forums/tuner-dy...ipe-300hp.html

 

Okay well 255 is closer to 270 than I got, that's for sure- and the guy with the MT had headers put on as well- which dollar:hp isn't exactly impressive but overally would add quite a bit to the overally. We also run roughly 40HP or more below the HRs.

Anyway- point being, don't waste money chasing after the number. Put some away to do the transition to FI properly and without cutting corners.

Of course I wish you the best with your goals- I'm just saying as an average guy with pretty standard aspirations myself... 270 was a LONG way off. Hopefully your altitude and weather conditions are more favourable than mine were at the time and you get close!

 

time to find you a new tuner then sir. that dyno was done with only a stillen catback and intake on the 5AT that pulled 250. so im hoping, well actually im putting faith in my tuner that with my more extensive list of mods we will get close to the numbers i have mentioned. and yes i will go forced induction but not on a stock block. so this will be my all motor setup while i start another build. thanks and hopefully ill have some dyno sheets to show soon enough

 

http://g35driver.com/forums/tuner-dy...-w-osiris.html

more hope??? im feeling really optimistic now. now just need to start my build that i got on the side. i will have a motor being dropped in thtas built along with the tranny upgrades in the future. still getting tuned on this motor since i only have 60k miles. plenty of time to get a build done

 

Anyway- point being, don't waste money chasing after the number. Put some away to do the transition to FI properly and without cutting corners.

 

its called reaching a goal!!!! if you don't set a goal for yourself then you won't ever strive to achieve the hp you personally want. well at least how i feel

haha who is cutting corners? this is a all motor setup cause i have 60k miles and im going to build a bottom end to hold boost and make around 350 without having to worry about rods or anything and put everything together outside the car. sounds like a pretty decent way to transition, just swap a built motor with kit on it into the car and retune