PP vs. Non PP?

[14 TUX BL]

You can argue about acceleration until you're blue in the face.

What I was looking for was either:
a) people putting a 100% bone stock PP vs. non PP car on the same track, on the same day
b) an similar automotive journal test

No luck.

But you're overlooking the two features found on PP, which makes the upgrade well worthwhile - ability to completely defeat AdvanceTrac and the additional cooling ... The aux water cooling will most certainly prolong the life of that oil.

Wasn't overlooking anything, just that there were no used PP SHO's in my area when I got my car so the topic wasn't relevant to me.

And seeing how I'll never road race my vehicle, being able to completely turn off Advance Trac isn't an issue.

Regarding the "sludge" problem (noting that the recent gen SHO's have been around for 5 years) it's reasonable there would be tens of thousand of reported failures on forums. But what I see are some reports that the fluid has failed, and other reports that the fluid is ok. Also, it seems that the people who do report the issue have both PP and non PP vehicles.

[ZSHO]

The answer is very simple without the back and forth discussions which clearly sounds gratifying to you based on your other post,there are plenty of options like trading in your non-PP for a PP just like i did,hope this helps you out.

[IHeartGroceries]

You bought a sport lux car, with wonderful power. As if having no manual trans option isn't bad enough, if the inability to defeat traction control really isn't a problem, that's incredible!

That's like having the world's fastest supercomputer with no mouse or keyboard to use it! Lol

[Dxlnt1]

My only 2 cents on this thread is 1 question. Do you want a fast car or do you want a quick car?
The higher gear ratio (PP) simply put will get you to speed quicker, and will affect engine speed. Hence the earlier 2-3 shift to get to 60 mph in the PP model. Someone posted on this thread the top end for PP was 122 mph and Non as 140 mph. That may be a little exaggerated but sounds about right. All related to final drive gearing.

Then the heavy duty parts just adds longevity to the all the parts. But that's not to say the standard equipment is within itself sub par for the task at hand.

So is there more joy in beating someone from a dig to 60 mph, the quarter mile or from 40-130 mph? And there are a couple you tube videos from New Mexico of these cars running on the back side of 130+ mph. And a recent article made the comment "the SHO is always hunting for 130 mph!" I will try to find that article but I think it was posted on this forum somewhere.

[AJP turbo]

My only 2 cents on this thread is 1 question. Do you want a fast car or do you want a quick car?
The higher gear ratio (PP) simply put will get you to speed quicker, and will affect engine speed. Hence the earlier 2-3 shift to get to 60 mph in the PP model. Someone posted on this thread the top end for PP was 122 mph and Non as 140 mph. That may be a little exaggerated but sounds about right. All related to final drive gearing.

Then the heavy duty parts just adds longevity to the all the parts. But that's not to say the standard equipment is within itself sub par for the task at hand.

So is there more joy in beating someone from a dig to 60 mph, the quarter mile or from 40-130 mph? And there are a couple you tube videos from New Mexico of these cars running on the back side of 130+ mph. And a recent article made the comment "the SHO is always hunting for 130 mph!" I will try to find that article but I think it was posted on this forum somewhere.

What do you mean the top end being 122?..

[Dxlnt1]

My only 2 cents on this thread is 1 question. Do you want a fast car or do you want a quick car?
The higher gear ratio (PP) simply put will get you to speed quicker, and will affect engine speed. Hence the earlier 2-3 shift to get to 60 mph in the PP model. Someone posted on this thread the top end for PP was 122 mph and Non as 140 mph. That may be a little exaggerated but sounds about right. All related to final drive gearing.

Then the heavy duty parts just adds longevity to the all the parts. But that's not to say the standard equipment is within itself sub par for the task at hand.

So is there more joy in beating someone from a dig to 60 mph, the quarter mile or from 40-130 mph? And there are a couple you tube videos from New Mexico of these cars running on the back side of 130+ mph. And a recent article made the comment "the SHO is always hunting for 130 mph!" I will try to find that article but I think it was posted on this forum somewhere.

What do you mean the top end being 122?..

Vehicle top speed.

The lower engine speed should also help with economy. Maybe someone can chime with engine speed at 60 mph in top gear.

[AJP turbo]

Well even stock it would be much higher than 122....and my stock strategy showed 140 or 145 for the electronic throttle limit...meaning the throttle will close when u hit that speed...there are speed limits for oil temp and outside ambient temp.

I'm going about 70mph at 2000 with pp. even with the 3.16 the theoretical speed should be close to 200 mph if you redline 6th and my car hits 140 on a regular basis and would easily do 160 if I had the room...so I'm not sure where the 122 comes from even stock

[IHeartGroceries]

Drag limited?

The highest I had mine was 120 mph, and it was still pulling.

I just don't have the cojones to press on after that.

[Dxlnt1]

I was using the numbers from SHOdded on post #21, so I dunno actual numbers. But theoretically, it would be true higher engine speed = lower top speed!

https://www.youtube.com/watch?v=fTjcxFPLNps

https://www.youtube.com/watch?v=PiFA-V1zZcg

[AJP turbo]

Nope...u would hit more than 1 electronic speed limiter before u were able to reach a drag limited top speed

[AJP turbo]

Oh ok....well those numbers look about right for 4th gear maybe....I'm about 112-115 when I tach out 4th gear at 6000 rpm...so 122 at 6500 makes sense...I'm not sure what his numbers were for tho

[SHOdded]

I hope the first 3 pics in the slideshow below help illustrate the PP acceleration advantage over non-PP:
http://www.hotrod.com/how-to/transmission-drivetrain/how-gear-works/

There are a few top speed calculators out there (see example below), not sure how it interplays with torque/power:
http://www.catherineandken.co.uk/sti/tyres.html

For the 6f55 and 2.77/3.16 final drive, it calculates top speeds as:
    1st   44/39 mph 
    2nd   69/61 mph
    3rd  108/95 mph
    4th  141/124 mph
    5th  200/175 mph
    6th  269/236 mph

6500 rpm redline, 245/45/20 tires, stock gearing.

[SHOnUup]

I'm running 255/45/19 tires...how much would that affect the gearing compared to the 45/20 setup?

Rich

[AJP turbo]

I'm running 255/45/19 tires...how much would that affect the gearing compared to the 45/20 setup?

Rich

Without plugging the values in ad say u might be pretty close to offsetting the gearing and being similar to what the pp is because u are gaining a mechanical advantage due to your tire diameter being shorter

[SHOnUup]

I'm running 255/45/19 tires...how much would that affect the gearing compared to the 45/20 setup?

Rich

Without plugging the values in ad say u might be pretty close to offsetting the gearing and being similar to what the pp is because u are gaining a mechanical advantage due to your tire diameter being shorter

Thanks...maybe this is the reasoning behind the gearing change? PP models are all 20" wheels right?

Rich