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Old 01-27-2013, 12:25 PM   #4551
2011boostdwrx
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I agree i noticed a big difference in the powerband on my swap, but I went with the 2011 STI gearing.
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Old 01-27-2013, 12:33 PM   #4552
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Quote:
Originally Posted by 2011boostdwrx View Post
I agree i noticed a big difference in the powerband on my swap, but I went with the 2011 STI gearing.
1-4 are the sane on ours so that's the biggest difference. Your 5-6 are shorter than mine so they'll feel peppier.
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Old 01-27-2013, 12:40 PM   #4553
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1-4 are the sane on ours so that's the biggest difference. Your 5-6 are shorter than mine so they'll feel peppier.
I think you have the best combo though, cause how often are you going to be WOT in 5th or 6th, considering 4th almost hits 115 mph haha

Def helps the fuel economy with those taller gears, and we all know we need that with how these things guzzle fuel
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Old 01-27-2013, 12:53 PM   #4554
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I agree. The long gears ate nice from cruising. And 4th will go 140 if I revved to 9k
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Old 01-27-2013, 01:01 PM   #4555
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I agree. The long gears ate nice from cruising. And 4th will go 140 if I revved to 9k
Destroke to a 2.3L and upgrade the turbo

Follow Dom at Maxwells car haha crazy 4500-9000rpm powerband, it's a lunatic!
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Old 01-27-2013, 01:29 PM   #4556
guitarman19853
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Is the 6 speed stronger than the gear set you were running before? Those were some pretty beefy gears, especially with the straight cut 1&2. I did see that the reason you did the swap was the differentials. Just curious how the gearboxes compare in strength.
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Old 01-27-2013, 01:33 PM   #4557
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Quote:
Originally Posted by J_Maher_WRX View Post
Destroke to a 2.3L and upgrade the turbo

Follow Dom at Maxwells car haha crazy 4500-9000rpm powerband, it's a lunatic!
i've been telling him and flex'nwrx about that motor for months now

i mean c'mon, who doesn't want this:

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Old 01-27-2013, 01:44 PM   #4558
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Quote:
Originally Posted by J_Maher_WRX View Post
Destroke to a 2.3L and upgrade the turbo

Follow Dom at Maxwells car haha crazy 4500-9000rpm powerband, it's a lunatic!
What does that car run? The local NF guys have a 2.5 that revs to 9l and runs high 9's @ 140.

https://www.youtube.com/watch?v=uI-kLqUyiLA

Quote:
Originally Posted by guitarman19853 View Post
Is the 6 speed stronger than the gear set you were running before? Those were some pretty beefy gears, especially with the straight cut 1&2. I did see that the reason you did the swap was the differentials. Just curious how the gearboxes compare in strength.
They should be at least as strong I think.
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Old 01-27-2013, 01:48 PM   #4559
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That is crazy! I want that^
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Old 01-27-2013, 02:07 PM   #4560
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Originally Posted by xluben View Post
What does that car run? The local NF guys have a 2.5 that revs to 9l and runs high 9's @ 140.

https://www.youtube.com/watch?v=uI-kLqUyiLA

They should be at least as strong I think.
I'm not sure what it runs in the 1/4. They're still playing with I think, they certainly haven't wrung it out to its maximum levels yet tho.

Yeah I know about that car, it's insane! Haha thing is the 2.5L isn't as reliable at those high rpms as the 2.3L will be over time, I think the 2.5L needs more beefing up to be able to handle those high rpms than the 2.3L as well if I'm not mistaken.

You think the 6spd is only as strong as the PAR gearset? That's interesting, I was always under the impression that the 6spd was absolutely bulletproof, and that the 5spds just can't handle the power the 6spd can. Though I guess that could be just due to the shorter ratios/less force on the individual gear itself?
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Old 01-27-2013, 02:08 PM   #4561
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Originally Posted by Jive Turkey View Post

i've been telling him and flex'nwrx about that motor for months now

i mean c'mon, who doesn't want this:

Video Link: http://youtu.be/_F30Vzb0qHg
Right? The powerband on that thing is actually retarded! When they are finished with that its going to be out of this world haha good bit of lag though... Power kicking in at 4500-5000 haha
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Old 01-27-2013, 02:47 PM   #4562
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MP/ Doms configuration is awesome, and definitely respectable in everyway. That car will be an absolute blast. My thoughts, and possibly similar to Ben's...

Does it become feasible to completely alter the car with a stroked motor to achieve the desired power(band) goals? The prevelance of quick spooling, high power delivering turbos is reality. Especially with e85, 450-500whp is relatively quick work. If the budget is there, 550+whp is a necessity, the power band of the motor is applicable.... do anything and everything possible that's desired.

I am perfectly content with a short block and ~ 3.5k-7.5k power band. Realistically, other priorities/ obligations come into play with something as in depth as that build. Few years... Different story.

*Knowing Ben, there'd be a stroked motor sitting on his photo table sharing beverages with him and no one would know.



Quote:
Originally Posted by Jive Turkey View Post
i've been telling him and flex'nwrx about that motor for months now

i mean c'mon, who doesn't want this:

[url]http://youtu.be/_F30Vzb0qHg[url]
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Old 01-27-2013, 03:05 PM   #4563
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Quote:
Originally Posted by FLEX'N WRX View Post
MP/ Doms configuration is awesome, and definitely respectable in everyway. That car will be an absolute blast. My thoughts, and possibly similar to Ben's...

Does it become feasible to completely alter the car with a stroked motor to achieve the desired power(band) goals? The prevelance of quick spooling, high power delivering turbos is reality. Especially with e85, 450-500whp is relatively quick work. If the budget is there, 550+whp is a necessity, the power band of the motor is applicable.... do anything and everything possible that's desired.

I am perfectly content with a short block and ~ 3.5k-7.5k power band. Realistically, other priorities/ obligations come into play with something as in depth as that build. Few years... Different story.

*Knowing Ben, there'd be a stroked motor sitting on his photo table sharing beverages with him and no one would know.
I agree with a lot of this. While that car is an absolutely blast, I think that as a DD it wouldn't be nearly as a feasible nor as fun as bens current setup. I would much rather a lower power output, but have power almost 2K rpms sooner, then have a lot more power but onlu starting to kick in at 5K. Completely unusable in 99% of DD activities, unless your commute involves a lot of highway driving.

Doms car is a more of a track only/drag strip kinda car, as he himself has said many times, but when it comes to that subject area, its a monster
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Old 01-27-2013, 04:14 PM   #4564
Android287
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At what rpm do you hit full boost in third?
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Old 01-27-2013, 07:42 PM   #4565
xluben
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Quote:
Originally Posted by FLEX'N WRX View Post
MP/ Doms configuration is awesome, and definitely respectable in everyway. That car will be an absolute blast. My thoughts, and possibly similar to Ben's...

Does it become feasible to completely alter the car with a stroked motor to achieve the desired power(band) goals? The prevelance of quick spooling, high power delivering turbos is reality. Especially with e85, 450-500whp is relatively quick work. If the budget is there, 550+whp is a necessity, the power band of the motor is applicable.... do anything and everything possible that's desired.

I am perfectly content with a short block and ~ 3.5k-7.5k power band. Realistically, other priorities/ obligations come into play with something as in depth as that build. Few years... Different story.

*Knowing Ben, there'd be a stroked motor sitting on his photo table sharing beverages with him and no one would know.
Quote:
Originally Posted by J_Maher_WRX View Post
I agree with a lot of this. While that car is an absolutely blast, I think that as a DD it wouldn't be nearly as a feasible nor as fun as bens current setup. I would much rather a lower power output, but have power almost 2K rpms sooner, then have a lot more power but onlu starting to kick in at 5K. Completely unusable in 99% of DD activities, unless your commute involves a lot of highway driving.

Doms car is a more of a track only/drag strip kinda car, as he himself has said many times, but when it comes to that subject area, its a monster
Haha. I don't have a destroked motor waiting for me. I don't ever plan on doing one. For a high revving track car it could make sense, but I wouldn't want to loose the spool and low end grunt of higher displacement on a street car. If you properly balance and assemble a 2.5L it can handle 9k with some amount of reliability. NF's Speeding Bullet is a street car with a much larger turbo than the MP/Dom car. It has TONS of top end potential, but it still quite usable even off the track.

Quote:
Originally Posted by Android287 View Post
At what rpm do you hit full boost in third?
Here's what I get looking at my most recent logs:

Code:
Tranny	Gear	RPM@20PSI	RPM@26PSI
5MT	3	3500		3900
6MT	3	3500		4000
6MT	4	3100		3400
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Old 01-27-2013, 07:50 PM   #4566
blehhh
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Originally Posted by xluben View Post
What you're saying is basically true but there are some other things to consider. It's the distribution of the weight that really matters. If the CF shaft were large enough diameter, and hollow (all the weight at the perimeter) it could actually be harder to turn that a smaller, solid, heavier shaft. This would all depend on the actual weights and measurements though. In general the CF shaft would almost always end up being easier to turn.
The distribution of weight basically is the polar moment of inertia, and the aluminum shafts are hollow, just like the CF. The aluminum ones are often bigger that the CF ones just for the sake of torsional stiffness, since aluminum has only 1/3rd the stiffness of steel.

I have no idea how much the inertia difference really translates into real-world difference, but on paper, in concept, it certainly begs one to look at more than just the weight.

To be honest, I'm really most interested in any one-piece DS just for the sake of ditching the two-piece design that bucks like crazy sometimes. I'd say your car definitely deserves a CF DS.
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Old 01-27-2013, 07:53 PM   #4567
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Yeah, that middle section of the 2 piece has so much play. With all the upgraded mounts it does seem much less though. Is installation more difficult with the 1 piece? Or does the u-joint at the rear end make it pretty easy to get it all lined up?
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Old 01-27-2013, 08:00 PM   #4568
blehhh
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Originally Posted by xluben View Post
Yeah, that middle section of the 2 piece has so much play. With all the upgraded mounts it does seem much less though. Is installation more difficult with the 1 piece? Or does the u-joint at the rear end make it pretty easy to get it all lined up?
I don't have one yet, but I hear it's easy as hell to do. The bolted end just drops down flush. No need to move it forward or back at all. I've spent most of my modding budget trying to just tighten up the drivetrain and make DDing a little less wonky, but I think that's still my next big mod. I want better clutch-feel, smoother downshifts and a larger margin of error with rev matching. I hear a one-piece delivers on all accounts.
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Old 01-27-2013, 08:06 PM   #4569
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I've had the OEM driveshaft on and off many times, and it's really easy. The only thing that I'm worried about with the 1 piece is how do you slide it into the tranny if you can't line it up straight, due to it hitting the rear diff. Maybe there is enough wiggle room that it works, I'm not sure. Worst case you could pull the rear diff, install the driveshaft, and then put the rear diff back on, but that's a lot more work.
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Old 01-27-2013, 08:30 PM   #4570
Android287
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There is a universal joint at each end. I think you just insert one end into the transmission and then lift the opposite end until it matches up with the bolts on the diff. Once in the transmission there is enough play to move it forward or back to get the rear diff bolts lined up. Been looking at and reading reviews on the carbon fiber ones for a while now. Haven't read any thing bad about them yet
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Old 01-27-2013, 08:50 PM   #4571
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Duh. You're right. I forgot about the u-joint on the tranny end. There shouldn't be any problem with install. Seems like a good way to go as long as they hold up. The CF ones are really spendy though.
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Old 01-27-2013, 08:51 PM   #4572
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Vibration, more-so with the aluminum ones, seems to be the only concern, and even then, you just undo the bolts, rotate it 90 degrees and try again. One out of the 4 orientations should be perfectly balanced.

I hear lots of people saying it just improves the driveability tremendously.

Last edited by blehhh; 01-27-2013 at 08:57 PM.
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Old 01-27-2013, 09:36 PM   #4573
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Expensive but proven to put more power to the wheels on a dyno. I've have seen dyno charts giving 10 to 15 more hp/Tq. But people say the smoothness and better drivability make it worth it alone.
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Old 01-27-2013, 09:39 PM   #4574
INKMAN
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I'll be waiting for the next cell phone shot of a piece of carbon fiber.
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Old 01-27-2013, 09:41 PM   #4575
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I guess I'd kind of think about it, but it's not high on my list. $1000 for 10HP and a little smoother drive doesn't seem like a lot of bang for your buck.
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