Twin Turbo on 2.5 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

10-15-2007, 03:51 PM

That's awesome Gary!! I am very curious about the turbowerx shop because I'm interested in their 3.2 kit. They haven't released all the details yet. What are your impressions of the shop? Can you tell us a little bit more about the outfit? Thanks for sharing.

Yeah, turbo's are a little tricky to lauch as you can't get any boost until it starts "working". The motor has to be under load for the turbos to spool. I love a little turbo whine now an then

jhandy · 10-15-2007, 04:23 PM

What kind of warrenty do they give on the parts? Do they cover the cost of the engine if it blows up? Is there any internal modification like Gemballa does?
James

HB. · 10-15-2007, 10:42 PM

Hey Gary, what SC kit did you have before switching the the TT setup? I'm curious because you said it was very noisy.

Gary in BR · 10-16-2007, 10:37 AM

Quote:

Originally Posted by HB.

Hey Gary, what SC kit did you have before switching the the TT setup? I'm curious because you said it was very noisy.

I had a Imagine Kit, on my you tube page there is a dyno with the sc on and a few driving videos.

www.youtube.com/gwhand

I did not notice how noisy it was until it was off.b

My old sc is for sale by JAAY he posted an ad here and on ebay.

Gerardo de Kort · 10-16-2007, 11:04 AM

Hi Gary,

Nice posting.
Unfortunately I haven't succeeded in dynoing mine yet.
I do share your opinion on the TT performance.
Mine also has PS2's and I don't have the heart yet to drop the clutch etc. Besides, the tires grip like hell. Nice thing is that the TT's do break the tires loose!

I should post something on youtube .

Do you have the cone type airfilter?

I'm using a K&N replacement filter on mine.

I also plan to install the hose from my AOS to intake. This, regarding a little bit of leakage of oil. Marc from Turbowerx recommended me this.

Gary in BR · 10-16-2007, 11:40 AM

Do you have the cone type airfilter?

I am using the EVO intake with cone air filter.

Get that dyno done I want to see what kind of power you are getting out of it.

HB. · 10-16-2007, 11:06 AM

Thanks for the reply Gary, so for just about the same price as the SC, you could get a turbo setup that produces more power with less noise. Sounds like the turbo route is the way to go.

Gary in BR · 10-16-2007, 11:42 AM

i would say between the two the tt is the way to go.

HB. · 10-16-2007, 01:22 PM

Thanks for replying, and thanks for sharing your first hand experience with the two kits. I have bookmarked their site so when I'm ready look into FI for my box.

Gary in BR · 10-16-2007, 10:34 AM

Quote:

Originally Posted by jhandy

What kind of warrenty do they give on the parts? Do they cover the cost of the engine if it blows up? Is there any internal modification like Gemballa does?
James

I think there is a 90 day on the kit, and i dont think any tuner besides Gemballa or Ruf cover the engine. and the are no internal modifications.

From my understanding because the turbos are set to only produce 6psi and they are an intercooled psi the engine is safe.

If someone tried running 15 or 20 psi I think the engine would turn into a bomb.

Gary in BR · 10-16-2007, 01:51 PM

[QUOTE=boxsterz]That's awesome Gary!! I am very curious about the turbowerx shop because I'm interested in their 3.2 kit. They haven't released all the details yet. What are your impressions of the shop? Can you tell us a little bit more about the outfit? Thanks for sharing.

When I went to Austin to drop off the car I drove all night met him at Colvins Automotive (as seen on Overhaulin) we dynoed the car, talked a little and he took me to the airport.

At pick up he met me at the airport with the car, we went over a few things and then I drove home.

So i never saw his shop.

Yeah, turbo's are a little tricky to lauch as you can't get any boost until it starts "working". The motor has to be under load for the turbos to spool. I love a little turbo whine now an then

I love the sound of the blow off valves.

NickCats · 10-18-2007, 11:35 AM

Gary,

Just wondering, how is it that the Turbo provides more power than the Supercharger ?

Imagine Auto's website claims approx. 80 additional hp :

http://www.imagineauto.com/boxster%20sc.htm

While TurboWerks claims an additional 65 hp :

http://www.turbowerx.com/Products/BoxsterTurbo/BoxsterTurbo.html

Thanks !

Nick

efahl · 10-18-2007, 04:11 PM

Properly engineered turbo systems have lower parasitic losses than supercharger systems. A turbocharger uses some of the energy in the exhaust gases that would normally be thrown away to spin the charger, while a supercharger taps directly into crankshaft power for the energy to compress the intake charge. Usually this translates directly to more HP at the wheels for turbo systems.

monza · 10-19-2007, 12:54 PM

The Imagine site has numbers problems.

First, 80hp gain over 150hp base is not 38%, it's 53%.

Second, if they are using about 5 psi, there is no way they can approach even 38%. The theoretical max in ideal conditions is 6.8% increase per 1 psi; 5 psi would therefore be a 34% increase, max, assuming all other factors perform at their theoretical performance limits. Operating over 5psi is an iffy proposition without an intercooler, so they can't be getting 38%, let alone 53%.

Lastly, it's not all about peak power; it's where in the rpm range the power happens. If you were to overlay the two dyno curves of the Imagine blower and the twin turbo, I bet the turbo curve is a lot higher than the blower curve at lower rpms. Even if the blower were to provide more peak power, it's going to do it at much higher rpms; the turbo car would be far in front of the blown car by that point.

A supercharger can't build boost until the revs are up, unlike a propertly tuned turbo setup. What you want is performance at lower rpms, unless you are at the track and never let things get below 5000...

Quote:

Originally Posted by NickCats

Gary,

Just wondering, how is it that the Turbo provides more power than the Supercharger ?

Imagine Auto's website claims approx. 80 additional hp :

http://www.imagineauto.com/boxster%20sc.htm

While TurboWerks claims an additional 65 hp :

http://www.turbowerx.com/Products/BoxsterTurbo/BoxsterTurbo.html

Thanks !

Nick

Gary in BR · 10-19-2007, 04:16 PM

The supercharger kit uses 4psi and the turbo kit uses 6psi and a intercooler.

Let me add some real world results to this conversation...

http://turbowerx.com/external_pictures/TWX_iA_overlay.jpg

My base line with a OEM 2.5 plus EVO intake desnorkeled

SC
and
finally the turbo overlay.

monza · 10-20-2007, 11:48 AM

Wow...that pretty much tells the story.

The turbo system equals the supercharger's peak torque, as early as 3000 rpm! The blower doesn't get to its torque peak until 6000 rpm...

Not to mention the turbo generates 29% more torque at its peak.

There is no comparison. And as for the Imagine website claims...

jhandy · 10-20-2007, 02:04 PM

I contacted these guys last week and I plan on going by to drive one of the development cars. The price for the Boxster S turbo kit is resonable.

How worried should I be about the motor blowing up?

I am really thinking hard that I will do this. They claim reliablity is the same as stock.