996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Anyone go from GT700 to GT800 or more?

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Old Oct 13, 2007 | 09:48 AM
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Originally Posted by buddyg

My goal is 850 rwhp, 9's in the quarter (although I won't break stuff to get that number, no hard launches), still road course worthy and 200 mph in the Texas mile.

Not too much to ask for is it?

Buddy,

From what I've gathered on the forum about how you like to drive you car (similar to me), I think a better goal for you would be to hit a specific trap speed in your car in it's typical street-driven configuration. Say, 140+ mph.

Hitting 9's or very low 10's is all about the launch and "breaking stuff", as you said.

Plus, you'll never be able to duplicate your best 1/4 mile E.T. on the street if E.T. is your main goal...since you'll have to run 17" drag slicks, strip as much weight as possible from your car, and then launch the **** out of it at the track to the best possible 60' time...which is what E.T is really all about.

My goal is to hit 155 mph in a 1/4 mile in the exact configuration that I run my car on the street. If I hit 9's while doing it, great...but if not, I won't sweat it.
 

Last edited by Divexxtreme; Oct 13, 2007 at 09:50 AM.
Old Oct 13, 2007 | 11:12 AM
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Originally Posted by Divexxtreme
He won't do it with GT3076R's regardless of the A/R. My 3076Rs with .82 A/R stop making power at 830 rwhp at 1.4 BAR on a Dynapack...which is only high 700's on a different dyno.
Definately going to go with GT35's.
 
Old Oct 13, 2007 | 11:14 AM
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Originally Posted by Divexxtreme
Buddy,

From what I've gathered on the forum about how you like to drive you car (similar to me), I think a better goal for you would be to hit a specific trap speed in your car in it's typical street-driven configuration. Say, 140+ mph.

Hitting 9's or very low 10's is all about the launch and "breaking stuff", as you said.

Plus, you'll never be able to duplicate your best 1/4 mile E.T. on the street if E.T. is your main goal...since you'll have to run 17" drag slicks, strip as much weight as possible from your car, and then launch the **** out of it at the track to the best possible 60' time...which is what E.T is really all about.

My goal is to hit 155 mph in a 1/4 mile in the exact configuration that I run my car on the street. If I hit 9's while doing it, great...but if not, I won't sweat it.
Scott,

I agree completely I will not launch hard just to run a 9 second quarter but if I hit 140 mph plus then we all know it has a 9 second run in the car.

I also will not strip the car down, or run 17 inch tires I will see what it can do with the basic street setup.
 
Old Oct 13, 2007 | 11:18 AM
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Originally Posted by robmd99
Jags
Did you just do a GT700 kit with a 3.8L build? Did you keep the same fuel system and turbos? Good luck and have fun!
Cheers
Robert

I already had the gt700.
 
Old Oct 13, 2007 | 11:21 AM
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How much lag is associated with the gt35 over the gt30's

Jag
 
Old Oct 13, 2007 | 11:31 AM
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According to Todd at Proto only about 200 rpms on the dyno.
 
Old Oct 13, 2007 | 11:34 AM
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Originally Posted by buddyg
According to Todd at Proto only about 200 rpms on the dyno.

Then gt35's it is!
 
Old Oct 13, 2007 | 12:20 PM
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Guys,

I'm getting the impression you're confusing "lag" with "proper operating range". They are two different things.

LAG = the time is takes to spool the turbos during the usable rpm band it's designed to operate within. Lag is time, not RPM. GT35's are made to operate in a different RPM range than GT30s. But the lag between them is almost identical. Same goes for K24's to K16s; different RPM range, but once in that range, the lag is very similar between the two turbos. With a larger turbo, you simply learn to drive the car in a different rpm range than you do with a smaller turbo.

Also, Buddy...remember, I trapped 148 mph with GT30's in a RWD, but nearly full weight car. Remember my friend, it's about the whole setup...NOT peak dyno numbers.

I would say that in most instances, the GT30 is a better turbo than GT35's for high HP TT applications. Especially if you plan on road-coursing your car. I do mostly roll-on runs these days, so GT35's will probably suit me better than my current GT30s do...although I won't know for sure until I try them.
 

Last edited by Divexxtreme; Oct 13, 2007 at 12:28 PM.
Old Oct 13, 2007 | 12:26 PM
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Scott we will see The Oracle of Arkansas Todd K wants me to use the GT35's. The GT30's run out of steam around 730 rwhp where the GT35's are good to 900 rwhp +.
 
Old Oct 13, 2007 | 12:34 PM
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Originally Posted by colorinc
Scott we will see The Oracle of Arkansas Todd K wants me to use the GT35's. The GT30's run out of steam around 730 rwhp where the GT35's are good to 900 rwhp +.
You're 100 hp off..they run out of steam at 830 rwhp, not 730.

But ya, Todd really likes the 35's...mostly because he can make lots of power with them with very low boost, which is what he prefers to do.
 
Old Oct 13, 2007 | 12:37 PM
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Originally Posted by buddyg
Scott,

I agree completely I will not launch hard just to run a 9 second quarter but if I hit 140 mph plus then we all know it has a 9 second run in the car.

I also will not strip the car down, or run 17 inch tires I will see what it can do with the basic street setup.

buddy, have you looked in to whether your stage 3 clutch/ halfshafts / tranny will handle the extra power (or will need upgrading)....oh, don't forget you'll be burning more rubber (better hooking compounds) so there will be more tire expenses also
 

Last edited by drjoe; Oct 13, 2007 at 12:39 PM.
Old Oct 13, 2007 | 12:45 PM
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Good point, Joe.

His tranny will be fine...but he'll need a new clutch and new half-shafts.
 
Old Oct 13, 2007 | 01:37 PM
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Todd K thought my stage 3 clutch would be ok but haven't talked to him about half shafts? What do they cost?
 
Old Oct 13, 2007 | 01:57 PM
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About $2k for the half-shafts.

With 800+ rwhp, I'd personally only go with a triple-carbon clutch or better.
 
Old Oct 13, 2007 | 02:30 PM
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Ouch!
 


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