Turbo lag reduced via driveshaft change?

[LordLo]

Well I just put my stock 2 pcs back in and turns out there is no more lag on my T4. Before I had my aluminum driveshaft in and it worked great for the stock turbo, but for the T4 it was pretty sluggish since it spooled around 4,000 rpms. Now boost kicks in at around the same time as the stock turbo, 3,000 rpms; this is with a .84 exhaust housing and .62 intake.

Not too bad in my opinion.

 

[bigaaron]

So you are saying that a one piece driveshaft alone added 1k rpm to the point at which you hit full boost? I REALLY find that hard to believe.

 

[Inygknok]

Not to mention the thread name says "Turbo lag eliminated". I sort of took it literally... more like "turbo lag reduced".

 

[johnathan1]

Maybe the stock driveshaft is SO HEAVY that it is actually putting more load on the engine? :icon_razz

 

[Blackfin]

Fill the shaft with lead and things will be even better.:biglaugh:

 

[starscream5000]

The only way I could picture this working is by what johnathan was saying, "more load on the engine" due to the extra weight the engine is having to spin to make the car move, but 1K less? C'mon...

 

[IJ.]

ohhhh my .... :aigo:

 

[AF1JZ]

ohhhh my .... :aigo:

I was patiently waiting for what you were going to say. You were right on que.

 

[rumptis]

I think I might convert my drive shaft to a 4 piece, I would probably be boosting around 1500 rpms then right?

Anybody have a few extra carrier bearings laying around?

 

[speed]

Well I just put my stock 2 pcs back in and turns out there is no more lag on my T4. Before I had my aluminum driveshaft in and it worked great for the stock turbo, but for the T4 it was pretty sluggish since it spooled around 4,000 rpms. Now boost kicks in at around the same time as the stock turbo, 3,000 rpms; this is with a .84 exhaust housing and .62 intake.

Not too bad in my opinion.

Um No.

 

[starscream5000]

Something had to have been done to the vehicle other than the drive shaft to make a turbo wake up like that...

 

[Ric]

This guy must be using a holset turbo

 

[speed]

This guy must be using a holset turbo

WOW! Good post ric! That was awesomely full of hilariousness!

:nono:

 

[shaeff]

i don't believe it. not for one second.

-shaeff

 

[BorHor]

Put the one piece back and and see where you boost at. I bet it is all in the mind.

 

[LordLo]

Well basically like one guy mentioned, it just puts more load on the engine and allows the turbo to boost faster.

Same concept as brake boosting, but yes it wasn't my mind playing tricks on me. I swapped from the jawsgear aluminum 1 pcs 11lbs shaft to the stock piece and it basically woke up the car.

You guys probably don't believe a word I'm saying, but it's understandable. I don't really care, all I know is my T4 feels like a CT26, but pulls all the way to redline. :love:

:biglaugh:

For the record, I'm using a cheap eBay turbo and I beat a nearly stock wrx by 4 car lengths at 6 psi! I sure you guys won't believe that either, but who cares.

 

[starscream5000]

As long as your happy with it, don't worry about what we say. Now, give me you 1 piece DS .

 

[LordLo]

As long as your happy with it, don't worry about what we say. Now, give me you 1 piece DS .

Sorry already sold it to a guy from the supraforums. :naughty:

 

[Mk3runner]

besides the aluminum 1 piece, I've seen steel 1 piece driveshafts as well. why not go that route?

 

[AGlobalThreat]

You have a history of funny threads