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Valve Body Mods, Giant Leaps Forward!!!


ClimberDHexMods

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Amsoil FTW

 

Amsoil here.

 

Amsoil. Or I would use any full synthetic comparable product (in terms of performance specifications) but I have not found anything I like as much. Haven't looked into BG. There is a thread on it if people want to go there for the BG discussion. Or there are ten general ATF question threads as well, all good places to go into more detail.

[CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER]
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LGT 5eat car year? 08

IPT VB mod already performed? No

Are you willing to pay close to but less than IPT prices (perhaps again) for a proper shift kit modification performed by fellow 5eat performance enthusiast ClimberD himself? Yes if the price is a nice price

Edited by OGHK87Jay
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I have 95% of the RE5R05A valve body figured out. Next I need to repeat the process on the 5eat 05-07 VB. Then comes testing on my car, for which I have made preparations for rapid on/off installs. The longest part of the process for testing will be driving the car around enough to get the TCU to do its learning.

 

The TCU measures how quickly the effective gear ratio is changing, and compares that to what the TCU tune is supposed to be. If it shifts too quickly, which will be the case, then the TCU will learn to slow down the shifts as much as possible. However, it should hit a limit to how much it can learn, and so I am going to be modding for that limit.

 

For those of you familiar with closed loop fueling logic, the Subaru ECU will change its closed loop fuel amount +/- 15%. Once you hot that 15% wall, it will go no further in trying to compensate.

 

So for the stock TCU, I do not know the TCU logic, but let's say for explanation sake that we are trying to increase shift speed by 100%. So I will try to mod the VB such that I hit 115% quick shifts, and then the TCU will slow it down by 15% points and make it 100% over time. That is a much over-simplified way to explain it, but basically that is what will be going on. I have heard it takes anywhere between 100 and 200, to as long as 400 miles to fully learn. I bet a lot of it depends how you drive, whether mostly city/mix or steady state highway.

 

 

I also still have a nasty pre-turbo exhaust leak, so I'm going to pull the turbo to replace gaskets, and put on a bigger GT3071 turbo. It makes 350whp on MT cars, so less on a 5eat. But I will easily hit 400 whp with it on E85, if I can somehow get enough fuel to it, which will be a problem. Point is the valve body setups will be tested with a fair bit of power :lol:

 

MBC is on the way as well so boost will be nice and easy to mess with! I'm going to set the timing to be conservative (by Subaru standards) and turn up the boost as far as I can without knocking. If I can get to 30psi, yay. We'll see what is possible with my dinky eBay TMIC. I realize many people will think this is just plain stupid. Well it's my engine, and I believe in this style of tuning. What I don't believe in is making power with low boost and max'ed out timing when your turbo can support higher boost efficiently. There are many great threads about this if you wish to question me on this.

Edited by ClimberD@HexMods
[CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER]
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ClimberD, I would hold off on that turbo swap. Are you sure you want to throw that variable into the mix while trying to get a feel for what the 5EAT is doing?

 

It shouldn't make any difference. Engine and transmission are pretty separate.

[CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER]
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It shouldn't make any difference. Engine and transmission are pretty separate.

Right, but I was thinking driving feel, kinda apples to apples comparo of before and after. Else you will advertise your services as a valve body capable of making the turbo push 30PSI :lol:

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but if you add that much power, coundn't you wreck your transmission quicker?

 

I have a spare ;)

 

Driving feel IMO is mostly independent of the engine as far as a VB is concerned. There are two different considerations that I will be watching for during testing.

1) Shift quality. I want same as you all want, a quick shift that doesn't slam or jar.

2) Power holding. If it slips, or acts such that it COULD eventually slip with repeat wear, it's a no-go.

 

#1 is the real prize here. That is what will get all my attention. That's the difference between IPT and TransGo on the 5eat VB. IPT just addressed line pressure, which is part of the whole equation. TransGo appears to have made a modification to each important clutch pack's major shift valve, some in a big way. It's a different apples and oranges way of getting a result, and IMO a more wholistic approach.

 

Back to the topic of power. Once I get the car set, I can drive at different throttle positions and different boost levels to hit many different shift situations. I will be feeling for what the car is doing, which is pretty easy to do.

[CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER]
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Great thread, ClimberD.

 

Car: 06

IPT VB Done? Yes

Interested in something better? Yes

 

My challenge has always been finding a shop capable of performing transmission work on a 5EAT...

...Support your LGT community...
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Any good trans specialist with good reviews should be able to do this super easy. Just avoid low cost chains. Some of them lack accountability and integrity. That can be said about anything, but I think you'll be hard pressed to find an example where the most knowledgeable rebuilders work for aamco. Anything beyond a simple rebuild or flush may be out of their service list.
[CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER]
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Any good trans specialist with good reviews should be able to do this super easy. Just avoid low cost chains. Some of them lack accountability and integrity. That can be said about anything, but I think you'll be hard pressed to find an example where the most knowledgeable rebuilders work for aamco. Anything beyond a simple rebuild or flush may be out of their service list.

 

Maybe, it was luck and I mostly agree that the chain stores of any type can be this way including AAMCO but my father had a complete rebuild done there on a Ford E4OD (older sister of the 4R70W, younger and stronger then the AOD or AODE). At that time (5-7 years ago) his AAMCO shop encouraged him when he asked for a TRANSGO or B&M shift kit be installed. I think it had 3 levels, he went with the stage 2 setting, 1st is not worth doing and 3rd level is too firm.

A 302 in a regular cab longbed and a fresh tranny with shift kit made that truck fun to drive. The open rear differential was the problem....one wheel wonder at the site of gravel or wet grass.

Pick a shop with an old guy that is grumpy...but not the one that is set in his ways and hasn't touched a tranny made after 1982....

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:lol::lol::lol::lol::lol:

 

Your laughing....I wasn't kidding....

 

Here's why I think that.

One of the best engine builders (not for imports) is a 60-70 old guy who seems to be mad at the world. Give him your block and $ and what you want it to do (HP for drag's or TQ for pulling) and you will get all that you paid for plus some no cost tricks he might throw in if he likes you.

 

Further to that. The two best (and completely independent) body shops around me, are run by father and sons teams. Not the cheapest but they can lay some paint....

 

There is exceptions. I am younger (30) and know a little about a lot of things. A family member knows about as much on motorcycles and amateur to semi-pro racing then many Pro riders that never touch there own bikes. He can dyno tune, rebuild dirt bike to Street bike and Rotax motors (but hates working on cars...to much trouble he says) Currently raking it in at a large Harley Dealer and he's 25.

Edited by Tomkat1127
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This applies in may areas and professions, IT included.

The pros become jaded and mad at their clientelle as time goes by, but they love what they do, namely engines, etc. so they still put their heart into it.

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I was laughing bacause its true(a young...er mechanic by trait) the old guys are horible to deal with but they know every trick in the book!

 

I know, I was only playing it.

 

This applies in may areas and professions, IT included.

The pros become jaded and mad at their clientelle as time goes by, but they love what they do, namely engines, etc. so they still put their heart into it.

 

Yep, agree 100%. For some reason IT and automobile have been my two career/hobby path's. Not a big future or pay in either. IT gets simpler and easier for every idiot to use and the pay went down. Automobiles get so complex, it takes a special tool to check your tire pressure...

 

Sorry for interruption....Thread is now back on track...

 

Need to sell something to get in on the GB. Then hold on to those until a kit comes out.....

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I know, I was only playing it.

 

 

 

Yep, agree 100%. For some reason IT and automobile have been my two career/hobby path's. Not a big future or pay in either. IT gets simpler and easier for every idiot to use and the pay went down. Automobiles get so complex, it takes a special tool to check your tire pressure...

 

Sorry for interruption....Thread is now back on track...

 

Need to sell something to get in on the GB. Then hold on to those until a kit comes out.....

 

true, but now days they go hand in hand..

Climber D... whats the progress on the 05-07? :lol:

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