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Old 11-22-2005, 05:46 PM   #1
jimtweet
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Default any 5spd gears to hold 350+whp, and a couple 6spd swap questions...please help

i am looking into a 2.5 short block for my 04 wrx, and 18g turbo with alky injection along with the fmic i have a reverse manifold....should put me in the range of around 360-380whp, that is plenty for me....my question is...

is there any gear set that can hold that kind of power for my 5spd? and clutch?

if i were to buy a 6spd tranny from say like gruppe-s or kingpin for example, what all would i need?
tranny, clutch, flywheel, shifter, and i know there is more? do i need a whole sti rear end? or does the tranny bolt in? can i use my wrx rear end with a different rear diff? new axles? new...?

i know nothing about tranny's so please be kind...
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Old 11-22-2005, 05:51 PM   #2
Master2192
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PPG gearset should be good, i'm not sure on a RA gearset.
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Old 11-22-2005, 05:53 PM   #3
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u dont need an STi tranny. If your looking to drag it then the five spd, or elctronic shift 4 spd auto would work great
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Old 11-22-2005, 05:56 PM   #4
jimtweet
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i just want a fun car to drive on the weekends and enjoy and show off, it is my 3rd car (2006 sentra, 1970 914, 2004 wrx)

i have had the car for over a year and a half and only have about 12k on it and have never raced, draged, autoxed, or beat on the car what so ever, i dont intend to , and im sure 370whp is way to much, but hey, you can never have to much power right?
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Old 11-22-2005, 06:12 PM   #5
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in keeping the 5spd and upgrading the gears and clutch, would i need a new rear end or diff or anything?
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Old 11-22-2005, 06:21 PM   #6
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Quote:
Originally Posted by jimtweet
in keeping the 5spd and upgrading the gears and clutch, would i need a new rear end or diff or anything?
nope...
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Old 11-22-2005, 06:28 PM   #7
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so i need gears and clutch? and thats it?

is keeping the 5spd the smart thing to do? most cost efficeint?
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Old 11-22-2005, 06:51 PM   #8
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its def the cheapest
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Old 11-22-2005, 11:12 PM   #9
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so i get a 6spd jdm from gruppe-s (per say), clutch and fly wheel, and shift linkage, what else do i need?
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Old 11-22-2005, 11:32 PM   #10
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ppg gears all the way. they are the strongest. a lot stronger than sti gearbox but they are crazy expensive. call andrew yates at andrewtech automotive 240-683-1000. he knows all. you wont be disappointed with his knowledge of subie trannies. he also knows everything about subie engines. i've seen some sick ass cars come out of his shop.
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Old 11-23-2005, 12:01 AM   #11
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Quote:
Originally Posted by Master2192
PPG gearset should be good, i'm not sure on a RA gearset.

ra gears wont hold that long.

get the ppg gears from andrew yates at andrewtech automotive

240-683-1000 he has applications for you needs, and is in gaithersburg, md

straight dog boxes to helical cut

and they arent that expensive for what your getting.
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Old 11-23-2005, 12:07 AM   #12
99RSTurbo
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I have a PAR engineering gearset. Putting 443hp to the ground and haven't had any issues. It has seen alot of passes and hard launches. About $3000
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Old 11-23-2005, 12:22 AM   #13
Master2192
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Personally from what i've seen, I would go with the PPG. But I want straight cut gears...
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Old 11-23-2005, 12:34 AM   #14
99RSTurbo
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Mine are straight cut 1st, and 2nd, 3rd is pretty close to straight cut, it whines pretty loud. I am proof this gearset holds up to alomost 450awhp.
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Old 11-23-2005, 01:52 AM   #15
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kaaz are good for under 500 if you want a good gearset. Just got mine. Guy I got them from had to go to ppg becuase he broke 1st gear. From what I understand he was running well over 500. I got out pretty cheap with these. I willbe putting well under 500 whp i am sure. I mostly got these for just in case. And the fact I am hard on 2nd and 3rd speed shifting. lol


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Old 11-23-2005, 01:31 PM   #16
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I've run the numbers and thought process a few times.

For Tq <250ft/lbs:
OEM should hold up (unless you drag or don't know how to drive)
Cost: $180.00 for good tranny fluid and a short throw shifter...

For Tq >250ft/lbs:
PPG or other specialty milled gears would be the right choice (not RAs; they are for ratio change not necessarily strength)
Cost ~$2,500.00 to R&R gearset in box on bench (w/ syncros, bearings, misc., and in/out of car add 1,200.00)

For Tq >350ft/lbs:
An STi 6-speed drive line is the way to go, they are bullet proof. And you get a front LSD
Cost: ~$6,000.00 (R&R, used box, DCCD, drive shaft, shifter, new rear pinion, and misc.)

If you do your own R&R of the tranny box you can save ~800

Good luck
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Old 11-23-2005, 01:42 PM   #17
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PPG will hold up to way more than 350#

5 speed is much better for drag racing.

I was going to buy a used 6 speed, but man who know what kind of shape the synchros are going to be in? They usually come out of a wrecked car some non-driver smashed and probably couldn't shift for crap either.

If was to go through all the crap to swap my car to an Sti drive line, I would sell my car and buy a new sti.

Sinking endless amounts of cash into a non-sti isn't the way I would go about this.

For 4,500 you could have Andrew at Geartech build you a NEW 5 speed that would hold more tq. than a 6spd. Plus you could go dog clutches instead of synchro. New is the key word man!

Kev
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Old 11-23-2005, 01:50 PM   #18
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yea i am not a fan of used parts... pgg is the way i am goin to go then..il talk to him and see if i cant get him to build me something himself...maryland isnt to far from me..

thanks for all the help..any clutches you guys reccomend? was looking at the act 6 puck..says it holds like 512 ft/lbs

Quote:
Originally Posted by Crazykev
PPG will hold up to way more than 350#

5 speed is much better for drag racing.

I was going to buy a used 6 speed, but man who know what kind of shape the synchros are going to be in? They usually come out of a wrecked car some non-driver smashed and probably couldn't shift for crap either.

If was to go through all the crap to swap my car to an Sti drive line, I would sell my car and buy a new sti.

Sinking endless amounts of cash into a non-sti isn't the way I would go about this.

For 4,500 you could have Andrew at Geartech build you a NEW 5 speed that would hold more tq. than a 6spd. Plus you could go dog clutches instead of synchro. New is the key word man!

Kev
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Old 11-23-2005, 02:31 PM   #19
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Andrew would be able to point you in the right direction on a clutch also. He is a very helpful person and has talked to me over the phone and spent some time teaching me even though I bought nothing from him.

If I could swing the cash, I would have PPGs in my box already. I have the older RAs in mine right now and am only running high 12s with a stg 4+ and haven't had any problems.

Building a new house so the car will be pushed aside and not beat on for a while.

Kev
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Old 11-23-2005, 10:43 PM   #20
99RSTurbo
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I am running a ACT six puck with 443AWHP!!!!!!!!!! And it is holding fine. Same with the PAR gearset!!!!!!You just cant slip that clutch which is a downfall. 5 speed is definately the way too go with drag racing. A local guy here was running 12.6 with a stock WRX box, switched to an STi 6 speed and was running in the 13's!!!! ACT gets a thumbs up for the price, but I am switching over to a triple carbon setup from ATS.
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Old 11-24-2005, 01:33 AM   #21
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Jim -

We've got exactly what you'll need! You could go with just about any mix of setup by PPG for the kind of power you want to end up making. I wouldn't really go with a 6-speed setup. You need lots of extra parts, and at the end of the day you'll have ratios not-so-hot for drag racing, and you'll have a complete setup that weighs significantly more than a 5-speed setup. If you want to look into it, you'll need the tranny, rear diff, axles, drive shaft, transmission crossmember, shift linkage, flywheel, clutch, DCCD computer and switches, and some other stuff as well.

As for the clutch, a puck would hold on forever, and ACT makes several variations of this. It's all about what you want to do with the car!

Give us a call at the shop, and we can work everything out. Let us know exactly how you intend to drive, and we can get you a setup that will be perfect for everything you want to do.

Phil
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Old 11-24-2005, 01:43 AM   #22
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^^^Listen to them, they know their stuff.
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Old 11-24-2005, 01:49 AM   #23
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Quote:
Originally Posted by 99RSTurbo
I have a PAR engineering gearset. Putting 443hp to the ground and haven't had any issues. It has seen alot of passes and hard launches. About $3000
where did you get your PAR gearset?
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Old 11-25-2005, 07:55 PM   #24
99RSTurbo
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I got the gearset from Larry Ganz I think is his name. The website was www.imprezars.com , but I think he is now www.subaruplanet.com??
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Old 11-27-2005, 12:15 PM   #25
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www.subaruplanet.com (Link doesnt work mang)I gotta check these people out.

-Caesar
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