My 200WHP 15 Auto FRS Build

[904FRSlow]

Originally Posted by stugray

Oh... So you got that change in HP from JUST the driveshaft. Is that what you are suggesting?

If you read my original post, I told a guy on how to get 200 whp without E85 basically. Don't see why you and Koa are attacking me for telling a guy on one way to do it.

[904FRSlow]

Originally Posted by stugray

Oh... So you got that change in HP from JUST the driveshaft. Is that what you are suggesting?

And I'm trying to explain to Koa that if you change the driveshaft from the stock to a one piece, lighter driveshaft then you will free up more power to the wheels.

[stugray]

Originally Posted by 904FRSlow

And I'm trying to explain to Koa that if you change the driveshaft from the stock to a one piece, lighter driveshaft then you will free up more power to the wheels.

And we are trying to tell you "no you won't". The change in HP is negligible. There will be a difference that you can "feel" but it will be increased nvh.

[904FRSlow]

Originally Posted by stugray

And we are trying to tell you "no you won't". The change in HP is negligible. There will be a difference that you can "feel" but it will be increased nvh.

Weird how my friend dynod at 178 with same set up I have except he has the stock driveshaft and a no cats then...

[stugray]

Originally Posted by 904FRSlow

Weird how my friend dynod at 178 with same set up I have except he has the stock driveshaft and a no cats then...

Weird how you would compare two completely different cars when back to back runs of the same car can vary by +/- 5 HP or more

[Ultramaroon]

The dyno argument is invalid because two completely different systems are being measured.

On a dyno the rotational inertia of the driveshaft makes up a larger part of the total inertia because it is being used to accelerate the roller.

In real life, it's accelerating the whole car.

Try mashing the gas in a fifth-gear pull from the same starting RPM as when on the dyno. Which one gets to redline more quickly?

The driveshaft is a tiny little part of the combined inertia. Please let it go.

[904FRSlow]

Either way, driveshaft helps achieve 200 whp without e85.

[Ultramaroon]

Not as much as turning off the radio but hey, it's your money. We're just trying to help other people avoid making the same mistake.

[stugray]

Originally Posted by 904FRSlow

Either way, driveshaft helps achieve 200 whp without e85.

Again, the driveshaft does not help.
Here's another reason:

While measuring the "Brake Horsepower" the oldest method in existence is to run the engine (or CAR in the case of a chassis dyno) at a constant RPM while applying the "Brake" and finding the point at which the engine can just hold RPM at max output.
The hp rating was determined at this constant RPM by how much power is consumed in the "brake" (hence the term "brake-horsepower")

How much hp is a lightweight driveshaft stealing from the system while it is rotating at constant RPM? the exact same amount as a heavy driveshaft rotating at constant RPM - ZERO.

Will a driveshaft that weighs 10 pounds lighter than your competitor help you beat him to the end of a quarter mile? - SURE.
The same as removing the 10 pounds from anywhere on the car.

[ItzYaBoyBugZ]

so i have come to conclusion my car is slow as hell
got beat by very old “light civic” i beat an old del sol, I beat old “car”? , I bet charger once
I got srt4 out of hole simply because he spun wheels, I left oft at home, no pedal dance mode for me, holing trac for 3 secs “mode sucks” etc… also track was 8th of mi and i was running 10 ’s lmao
got spanked by wrx, and s2000. noticed my car is a lot more fun to drive on highway, threw turns etc than it is in quarter or 8th mile, I need turbo badly

[JonAvalon]

Originally Posted by ItzYaBoyBugZ

so i have come to conclusion my car is slow as hell
got beat by very old “light civic” i beat an old del sol, I beat old “car”? , I bet charger once
I got srt4 out of hole simply because he spun wheels, I left oft at home, no pedal dance mode for me, holing trac for 3 secs “mode sucks” etc… also track was 8th of mi and i was running 10 ’s lmao
got spanked by wrx, and s2000. noticed my car is a lot more fun to drive on highway, threw turns etc than it is in quarter or 8th mile, I need turbo badly

E85, transmission and final drive upgrades will go a long way to fix that......for the most part. Otherwise just slapping on a turbo will only help with power but not fix how slow the A/T launches and shifts compared to the M/T.

[ItzYaBoyBugZ]

I’m ready to get blasted for not knowing answer to this. I know I know i’m a complete idiot that needs to go find the blinker fluid isle somewhere etc …
but how do I use launch control in my oft tuned frs
when i put car in neutral and rev to redline it sounds like i hav launch control
but if i drop from neutral to drive that can hurt transmission correct ?
my car wont let me power brake, yet forgot oft last night and wasn’t in pedal dance mode etc
does pedal dance mode solve all my problems etc? if so next time bringing oft with me
*left it at home etc

thank you
how do I launch with auto?

[tyrantcf]

Originally Posted by ItzYaBoyBugZ

but if i drop from neutral to drive that can hurt transmission correct ?

Nope, this is fine. You should be doing this for every launch.

[drewbot]

Originally Posted by ItzYaBoyBugZ

I’m ready to get blasted for not knowing answer to this. I know I know i’m a complete idiot that needs to go find the blinker fluid isle somewhere etc …
but how do I use launch control in my oft tuned frs
when i put car in neutral and rev to redline it sounds like i hav launch control
but if i drop from neutral to drive that can hurt transmission correct ?
my car wont let me power brake, yet forgot oft last night and wasn’t in pedal dance mode etc
does pedal dance mode solve all my problems etc? if so next time bringing oft with me
*left it at home etc

thank you
how do I launch with auto?

If you haven't broken your tranny yet, you can only hold the brake hard (but not too hard), and let the RPMs sit around 2500 or so with the stock torque converter...

This is all with the tranny set to D or M