aluminum drive shaft - anyone?

[burdickjp]

Originally Posted by cdrazic93

1. Being an engineer is being an applied mathematician. We go to school to get it right, over and over and over again.

Are you an engineer, or an engineering STUDENT? Do you have your piece of paper? Are you still sitting behind a desk with clean hands?

Engineers don't get it right every time. They screw up on a regular basis. The reason why is because engineering is about modeling. You make the simplest model you can and compare it to the behavior of a test. You iterate until they agree well enough to make predictions about your system which are accurate enough for what you're trying to accomplish.

[nunonuna]

Originally Posted by GT86_PRAGUE

You claiming to be an engineer doesnt mean that you are automatically right. You failed to understand I asked for someone with real experience and you didnt changed you propshaft obviously, you only crunch some numbers. So yes, you might be right on the numbers but thats not what I was asking for.

Post #235 is my real personal experience with dyno backing up my claim. So does it qualify to be good enough??

[stugray]

Originally Posted by nunonuna

Post #235 is my real personal experience with dyno backing up my claim. So does it qualify to be good enough??

No because that plot does not show the change from the DS change ONLY.
AND the fact that that plot shows a difference of 2 hp which in Dyno back-to-back runs is effectively ZERO.

[nunonuna]

Originally Posted by stugray

No because that plot does not show the change from the DS change ONLY.
AND the fact that that plot shows a difference of 2 hp which in Dyno back-to-back runs is effectively ZERO.

Isn't that what I'm trying to tell?
I just tried to give evidence that DS & LWCP doesn't show any gain neither it can be felt.

[stugray]

Originally Posted by nunonuna

Isn't that what I'm trying to tell?
I just tried to give evidence that DS & LWCP doesn't show any gain neither it can be felt.

Ok sorry I thought you were of the koolaid crowd.
Yes, your plot shows that there is no discernible difference for any of those three mods.

However if it was the vendor of those three items doing the dyno run for you, you probably would have had 12 hp gains.....

[cdrazic93]

Originally Posted by bur****jp

Are you an engineer, or an engineering STUDENT? Do you have your piece of paper? Are you still sitting behind a desk with clean hands?

Engineers don't get it right every time. They screw up on a regular basis. The reason why is because engineering is about modeling. You make the simplest model you can and compare it to the behavior of a test. You iterate until they agree well enough to make predictions about your system which are accurate enough for what you're trying to accomplish.

No engineers dont always get it right, but for a first level calculus based physics class problem like this, pretty easy compared to, rocket science. While yes i am an engineering student, from the likes of some of the posts ive seen on this forum it doesnt take a 4 year degree to tell people when theyre right or wrong.

[stugray]

Originally Posted by themadscientist

They think you should get the CF driveshaft. Their slide rules all agree.

Funny story related to that pic:
I was at the KSC Saturn V museum where they have a "100% authentic" mission operations room with the consoles.
It is set up to be "exactly like the day they launched". It had the smocks with the various contractor names on them and clipboards, pencils & pencil sharpeners.
It looked very good with blinking lights and everything.
The tour guide over-heard me telling my kids "Well they missed at least one thing in the authenticity".
She looked offended and asked me what they had missed (with an attitude of course).
I simply stated "Where are all the ashtrays?"

She didnt say a word and just kept going with her speech.....

BTW- I am one of those guys & I have been "on console" a number of times at KSC...

[TylerLieberman]

#placeboeffect

[Poodles]

Asking for anecdotal evidence is the same as saying "lie to me."

[burdickjp]

Originally Posted by Poodles

Asking for anecdotal evidence is the same as saying "lie to me."

[lamawithonel]

I won't involve myself in the debate over performance value, but I found this on the Subaru Canada site listed as a safety feature of the Outback (and implying it's standard across the fleet):

Break-away Engine

Every Subaru goes above and beyond common practice when it comes to your safety. In the event of a head-on collision, the SUBARU BOXER engine and transmission are designed to absorb impact and then break away from the vehicle structure and drop below the passenger cabin for added protection.

[Toyota86.ir]

I am engineer, math is useful if you completely model the systems, you could not do that and in driving it is better to go subjective review.
I did not changed driveshaft but i know some mods make the car faster even it really is not faster.
Final drive swap make me feel my car become faster but it really is not faster

[justatroll]

Originally Posted by Toyota86.ir

I am engineer, math is useful if you completely model the systems, you could not do that and in driving it is better to go subjective review.
I did not changed driveshaft but i know some mods make the car faster even it really is not faster.
Final drive swap make me feel my car become faster but it really is not faster

Whoa! Holy Contradictions Batman!
That entire "almost paragraph" is completely self-contradictory:

"I am engineer" -> " in driving it is better to go subjective review"

translation: "I am an engineer, but believe in touchy feely rather than data."
No that makes you an Astrologist....

" know some mods make the car faster even it really is not faster"

translation: "Almost but not quite, entirely, UN-like tea"
OR "same, same, different.... but still same"

"Final drive swap make me feel my car become faster but it really is not faster"
NO a final drive change certainly WILL make the car faster in acceleration. That is not even debatable...

[Toyota86.ir]

Originally Posted by justatroll

Whoa! Holy Contradictions Batman!
That entire "almost paragraph" is completely self-contradictory:

"I am engineer" -> " in driving it is better to go subjective review"

translation: "I am an engineer, but believe in touchy feely rather than data."
No that makes you an Astrologist....

" know some mods make the car faster even it really is not faster"

translation: "Almost but not quite, entirely, UN-like tea"
OR "same, same, different.... but still same"

"Final drive swap make me feel my car become faster but it really is not faster"
NO a final drive change certainly WILL make the car faster in acceleration. That is not even debatable...

there is no self-contradictory.
My english writing is not good but maybe i could teach you about subjective vs objective review.

i audio reviewing and some other reviewing we could analyse the system in two way.
http://nwavguy.blogspot.ae/2011/05/s...ve-debate.html

https://en.wikipedia.org/wiki/Audio_equipment_testing