993 Turbo This community is about the last air cooled twin turbocharged Porsche 911. Model year 1996 - 1997. Also inclusive in this forum is talk on the final 182 Porsche 911 Turbos built in 1997 known as the Turbo S.

Protomotive 993tt dyno of clutch slipping

Old May 8, 2007 | 08:24 PM
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Protomotive 993tt dyno of clutch slipping

Here's a dyno showing a porsche cup car clutch and gt2 pressure plate, supposedly good for 800# of torque, slipping while being tuned at Protomotive.
The engine was fairly conservative using the original MAF meter and stock exhaust manifold setup.
Bigger numbers and a broader curve could be had using the custom MAP and protomotive exhaust setup.
The numbers are actually what's at the wheels.
 
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Old May 9, 2007 | 08:52 PM
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WOW, that's awesome! What kind of hybrids are you running on it? K24/18G's?
 
Old May 10, 2007 | 05:24 AM
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K24/T04E 46's
 
Old May 10, 2007 | 11:43 AM
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WOW, nice compressors! They flow 41lbs/min! Good for ~410HP on a water pumper and ~350HP on an air-cooled motor

How do you find the spool-up with those on the K24 turbines? Not too laggy?
 
Old May 10, 2007 | 08:41 PM
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Thanks. The BIG push in the back happens around 4500 rpm. With UMW stage 2's it was maybe 3600 rpm. Picked up 14 mph trap speed in the 1/4 mile though.
 
Old May 10, 2007 | 08:52 PM
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That's seriously fast in any man's language! Congrats!
 
Old May 11, 2007 | 01:51 PM
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Nice numbers!

This raises the question, why go MAP instead of MAF ? This dyno shows you have more horsepower than I do, with less boost, a 3.6 engine instead of 3.8 and I have equal length headers and special exhaust? Humm.

My guess is that on Todd's engine dyno you would show 600FWHP.
More than enough!
 

Last edited by Jean; May 11, 2007 at 01:53 PM.
Old May 11, 2007 | 04:19 PM
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Originally Posted by Jean
Nice numbers!

This raises the question, why go MAP instead of MAF ? This dyno shows you have more horsepower than I do, with less boost, a 3.6 engine instead of 3.8 and I have equal length headers and special exhaust? Humm.

My guess is that on Todd's engine dyno you would show 600FWHP.
More than enough!
Brad
Awesome indeed Bud.

Jean
How will this engine comprised from not having MAP and stock IC?
 

Last edited by vincentdds; May 12, 2007 at 10:06 PM.
Old May 12, 2007 | 02:22 AM
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Originally Posted by Acropora
Thanks. The BIG push in the back happens around 4500 rpm. With UMW stage 2's it was maybe 3600 rpm. Picked up 14 mph trap speed in the 1/4 mile though.
Is 4500 when you hit maximum boost? If so, that means the T04E compressors have attributed an extra 900rpm of lag

I guess if you don't mind the extra lag, then yes, those figures are awesome.

How does the car perform in around street driving? Is it liveable?
 
Old May 12, 2007 | 06:36 PM
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Originally Posted by Jean
Nice numbers!

This raises the question, why go MAP instead of MAF ? This dyno shows you have more horsepower than I do, with less boost, a 3.6 engine instead of 3.8 and I have equal length headers and special exhaust? Humm.
Jean - Acropora has a 3.8 also.
 
Old May 12, 2007 | 09:09 PM
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Vincent, sorry I did not understand the question .

If it is :"Jean will this engine be compromised for not having MAP and being on stock IC" the answer is DEFINITELY, as far as HP and torque numbers are concerned that is. Drivability will be nicer though.

RSS thanks for pointing that out, I forgot the details of the build, 3.8, the way these engines should have been built from the factory!

In any case, I had to go with a radical MAP setup, exhaust system, intake, intercooler etc..from Protomotive to get to numbers that are lower than the ones Brad had at the same boost levels, there obviously is a problem somewhere!

Or maybe I have 800HP at 1.1 Bar then
 
Old May 13, 2007 | 04:15 PM
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Sorry Jean
I am not very good posting from my cell phone. But that' s what I meant.
 
Old May 15, 2007 | 08:47 AM
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I would hope you know the build since you helped me in deciding how to proceed Jean! My numbers are from Todd's new dynapack vs yours from his engine dyno. Your power band is much wider and the hp keeps climbing w/ rpm's.
This car is very driveable w/ r compounds. If you get on it w/ street tires it goes sideways w/ -2 rear camber though.
Basically yours, mine, and Jeans engines share the same foundations Vince. Dunno if you want to spend extra to get Jean's build vs settling w/ this build configuration.
 

Last edited by Acropora; May 15, 2007 at 08:50 AM.
Old May 17, 2007 | 01:41 PM
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Vince I would go with the MAF setup and smaller GTBB turbos than mine.

Todd's MAP setup is fantastic if your usage is like mine, more track oriented and less street daily usage.

Brad, I am not a fan of chassis dynos, and this is really why. I don't remember what went into this build, since you ended up making changes if I recall correctly, but with MAF restriction it sure cannot have bigger numbers than mine. Do you have stock IC still?

Of course this has nothing to do with a willie measurement exercice, I am just pointing at some inconsistencies. I knew this chart was from Todd's chassis dyno, so from an apples to apples comparison with the rest of the tuners out there, it is good, but when it comes down to reality it will not be.

IMO The powerband cannot be compared because it is being run on different dynos as well, I would expect yours to be broader than mine in fact and have more low end torque.

Your car is very fast no doubt about it, but if we want to nitpick a bit, the numbers should be around 15% lesser than mine at least at the same boost level.

A 60-130mph would be nice.
 
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