Update on my '09 Turbo!

[DerekH]

I'm not trying to jack your thread but you brought it up and I'm not good with mathematicles

328 on my last tank. 13.1 gallons. 25mpg. Sunoco 93oct.
So...if the TDi 5th gear gets you 33mpg, 8mpg more than I get now...how many miles will I need to drive before the gear pays for itself? 93oct runs about $4.19 here.

I'll hang up and listen to your reply.

My room mate and i just spent like 20 minutes making a fancy graph to figure this out lol. turns out it was less than i expected. It takes about 5000 miles of driving before it starts to pay off. this is assuming you are going from 25mpg to 33mpg which you probably wouldn't because hes got a turbo and you don't.

here is the graph just because lol. Figured it at 4.20 per gallon just to make it easier on my brain.

[thygreyt]

5k miles isnt much anyways

[Anile_eight]

I must complement you on a good graph I think thygreyt can also lol from out engineering back ground.

[thygreyt]

I must complement you on a good graph I think thygreyt can also lol from out engineering back ground.

lol, yes!

i kept on watching it and just staring, doing it all in my head as well

i made similar calcs on my tranny swap! i went from doing 320 (max) to the tank to doing 420 (max) to the tank.. and consistently over 360!

good job!

[Gott ist gut]

My room mate and i just spent like 20 minutes making a fancy graph to figure this out lol. turns out it was less than i expected. It takes about 5000 miles of driving before it starts to pay off. this is assuming you are going from 25mpg to 33mpg which you probably wouldn't because hes got a turbo and you don't.

here is the graph just because lol. Figured it at 4.20 per gallon just to make it easier on my brain.

I applaud your great work!!!
Unfortunately my work's web nanny filters out the pics...I think they expect me to be working or something
I'll have to check it out when I get home.
Thanks again.

[thygreyt]

I applaud your great work!!!
Unfortunately my work's web nanny filters out the pics...I think they expect me to be working or something

work? whats that?? i thought they paid me to be here!

[Brabbit32]

you guys are confused, Anile PURCHASED my transmission used from me with 15k miles on it. I had previously done the install myself. With the .717 5th i dropped about 800rpms over the stock 5th gear ratio. Makes a HUGE difference on the highway/gas milage, and yes its about an hour install with ZERO need to remove the transmission. There is a small side cover on the transmission (looks like a small oil pan) than you remove and WHAM theres 5th gear. You just remove the gear selector, pop off the old gears and re-install the new one. Now when i say POP i mean your going to have to work at it. Some come off easy, some need heat and a gear puller.

[Brabbit32]

And my car was turbo'd with the TDI 5th, and the car actually gets BETTER gas mileage with the turbo! I drove from where i live to H20, hand calculated 37mpg with me taking it easy on it (occasional romping )

[thygreyt]

And my car was turbo'd with the TDI 5th, and the car actually gets BETTER gas mileage with the turbo! I drove from where i live to H20, hand calculated 37mpg with me taking it easy on it (occasional romping )

turbo usually gets better milage than NA, if driven properly.

[gugu1981]

edit: .717 seems very short. That's enough of a difference?



Peter

[Brabbit32]

like i said, .717 is MINUS 800rpms off of the stock 5th gear

[thygreyt]

like i said, .717 is MINUS 800rpms off of the stock 5th gear

lol, want me to make a lil chart with the .717 as final?

[thygreyt]

[gugu1981]

Awesome chart, and HUGE difference. Thank you thygreyt!!

I guess the description on boraparts is comparing to stock TDI gearing. The TDI gearing in itself is already a noticeable improvement over the stock 2.5l gearing.


Peter

[thygreyt]

Awesome chart, and HUGE difference. Thank you thygreyt!!
Peter

no worries.

once i made the chart, and inputed all the formulas and numbers, then getting the values for a different gear is SUPER easy.

and i like comparative charts.

[Anile_eight]

214!!!! lol omg I saw that and laughed!!!!

Yea, that chart seems correct. I cruise around 2550-2600 on the interstate.

[thygreyt]

214!!!! lol omg I saw that and laughed!!!!

Yea, that chart seems correct. I cruise around 2550-2600 on the interstate.

for 214 you need at least 7550 RPMs and a LOT of power to overcome the increased parasite drag... and some aero mods to keep you from flying away...

but it'd be fun to break the 200s on a 2.5!

[Gott ist gut]

for 214 you need at least 7550 RPMs and a LOT of power to overcome the increased parasite drag... and some aero mods to keep you from flying away...

but it'd be fun to break the 200s on a 2.5!

Well that's just greyt...(pun intended) you just created another pipe dream for the 2.5ers to go along with the effecient super charger, 10k RPMs, and trying to compete with 034's Vauwdi 3.0T in ETgp

edit: And ITB's...

[Anile_eight]

Haha, awesome!

[tay272]

Thanks for the info guys, much appreciated. Deffinately gonna be my next mod I think although Im prolly gonna go with the next shorter gear, Id like to only drop it at most 500 rpms. 800 is alittle much for me.

[Anile_eight]

Thanks for the info guys, much appreciated. Deffinately gonna be my next mod I think although Im prolly gonna go with the next shorter gear, Id like to only drop it at most 500 rpms. 800 is alittle much for me.

You know it doesn't drop 800 rpm everywhere... honestly if I would do it again id go a gear lower and g to 0.700 instead of my current 0.717. I am assuming you meant a higher gear if it is too much? Really this is an awesome setup. I can get into 5th around 35-37. On the interstate instead of 3100my rpm its now 2550/2600rpm it sweet!

[tay272]

Yeah thats what I meant. I was thinking of going with the .658 gear cause it says it drops it about 500 rpms. I just dont want a really big drop because my car is my DD and havin to rev out 4th farther just driving around isnt something I really wanna do. I do want better mpgs while cruising on the highway tho and this is my best bet at getting that. If you think its a good combo tho then I cant argue with that. I dont do alot of highway driving but I do enough that this mod would be beneficial, not to mention being able to hit higher speeds in 5th if I really wanted to . I have yet to really open my engine up on the highway since I installed my SRI. I wanna see what the top speed of this engine really is.

[nickbeezy]

Yeah thats what I meant. I was thinking of going with the .658 gear cause it says it drops it about 500 rpms. I just dont want a really big drop because my car is my DD and havin to rev out 4th farther just driving around isnt something I really wanna do. I do want better mpgs while cruising on the highway tho and this is my best bet at getting that. If you think its a good combo tho then I cant argue with that. I dont do alot of highway driving but I do enough that this mod would be beneficial, not to mention being able to hit higher speeds in 5th if I really wanted to . I have yet to really open my engine up on the highway since I installed my SRI. I wanna see what the top speed of this engine really is.

im exactly where you're at. i want to get better mpg, but i DD my car and i use my 5th gear often for driving around town/city. but at highway speeds i wish it was lower. 45-55 is what my 5th gear usually sees.

[Imanol Alamillo]

Wow, super cool project. I have one technical question for you: the cam sprockets have no keyways at all to aid on timing setting, so how can you tell the alignment of the sprockets to the cam? I have this question particularly on the intake cam, where you have the variable timing and stuff. Does the sprocket needs to be in a particular position with the cam?
When you have the crankshaft and camshafts locked at the exact position how do you know the position of the sprockets?

Thanks

[nothing-leaves-stock]

there is a spacial tool to lock the cams in place and a special way to set the VCT gear. you MUST do both or things will NOT work

[Anile_eight]

Yeah thats what I meant. I was thinking of going with the .658 gear cause it says it drops it about 500 rpms. I just dont want a really big drop because my car is my DD and havin to rev out 4th farther just driving around isnt something I really wanna do. I do want better mpgs while cruising on the highway tho and this is my best bet at getting that. If you think its a good combo tho then I cant argue with that. I dont do alot of highway driving but I do enough that this mod would be beneficial, not to mention being able to hit higher speeds in 5th if I really wanted to . I have yet to really open my engine up on the highway since I installed my SRI. I wanna see what the top speed of this engine really is.

im exactly where you're at. i want to get better mpg, but i DD my car and i use my 5th gear often for driving around town/city. but at highway speeds i wish it was lower. 45-55 is what my 5th gear usually sees.

For a DD and the 2.5L the .658 gear would be too large of a drop. I would not go any lower then 0.700! My .717 is really nice and probably ideal if you do a lot of city driving and only a little highway. But if it is a little more highway, I would do the 0.700. With the current gear (0.717) it took me a day or two to get used to it, but really you don't have to rev out 4th as much as you think. I go up to 2000-2500 tops and it gets in fine if i'm in the city with lower speed limits, else you can rev it up higher if you want. I love the gear and I wouldn't worry about that issue with the 0.700 gear and above.

[tay272]

well then u sold me haha. .717 it is then. thanks for ur help man.

[Anile_eight]

well then u sold me haha. .717 it is then. thanks for ur help man.

Anytime, glad I could help

[define your self]

am i missing where you can buy this gear for 200?

[TylerO28]

I'm going 717 and LSD... I really need a diff. Under steer is bad! Again liking the progress. Any input in installing the diff?

I know shimming may be necessary but did you experience any problems?

[Anile_eight]

I'm going 717 and LSD... I really need a diff. Under steer is bad! Again liking the progress. Any input in installing the diff?

I know shimming may be necessary but did you experience any problems?

I have the 0.717 and the Peloquin LSD its a nice combo. I love the LSD! I didn't install it but DanGSR has and he says that he never want to do it again. He's also install dozens and dozens of suspensions.

[Gott ist gut]

My room mate and i just spent like 20 minutes making a fancy graph to figure this out lol. turns out it was less than i expected. It takes about 5000 miles of driving before it starts to pay off. this is assuming you are going from 25mpg to 33mpg which you probably wouldn't because hes got a turbo and you don't.

here is the graph just because lol. Figured it at 4.20 per gallon just to make it easier on my brain.

At home now and noticed that you graphed it for $200...I was assuming the 5th gear swap would be between $350 and $450. And keep in mind, the total miles will be miles driven in fifth gear.
I'm thinking that it will pay off after about 10,000 miles driven in fifth...or 15,000 miles total. Doesn't really seem worth it to me anymore.
Still very much appreciated.

[Brabbit32]

Hmmmmmmm, whats this?

[Brabbit32]

and this?

[TrillyPop]

mmm...AWD and meth?