Don't worry John, there's gonna be some braggin about straight line

acceleration right around the corner

btw, when are you pullin the trigger on those 3071s?

and have you looked into the 3073s?

methinks I know somebody whos got 'em

 

I know nothing about the 3073s.
I don't believe they would spool quicker then a 3071?
You already can make enough power that the stock block can not handle with the 3071s and probably can not make more power with them over 3071s on 93 pump gas??
So I don't think they would be any advantage for me?
But I don't know the details on them..
I am really happy with my K24/18g set-up but when it gets warm outside and I go on this site ,,I get the bug to pull the plug on them..LOL

 

Ask Sambo about the 73s. He has some interesting feedback and time slips

from a customer down south America. Gregg at Tial has some info on them

as well.

There's no appreciable difference in spool from a 71 to a 73 and it's a

very good value considering the minimal price difference vs. the gain

 

Btw, the data that Sambo has is on 93 pump and it's damn impressive.

No way you could do that on 71s.

Wouldn't hurt to look into it....

 

A fixed percentage is erroneous. You can't give a static value for driveline

loss on an inertia dyno. These percentages, especially the big ones, were

a creation of tuners. Porsche drivetrains are amongst the most efficient

in the world. The awd inherently has more friction losses then the rwd

but neither are as high as popular opinion has them.

We have a half dozen shops in Birmingham with ex NASCAR guys. Several

engine dynos and those guys are quick to tell you that a chassis dyno

is good for tuning and nothing else. They'll also tell you that big drivetrain

losses are the stories of performance shops and tuners lol.

Turbocharged is even more iffy. You can't use SAE correction and more

then not, you can't get the fans to mimic 130 mph.

I like to do it to see the gains from build to build and I like to calculate

double digit drivetrain loss to make me feel better but I know the deal lol.

 

If you want to have a really happy day, tap on the brakes when the dyno is in the drivetrain losses measurement phase and see the crazy engine HP that the dyno will spit out

Not saying any tuner would ever do this, but this is the easiest way to find some extra 100 HP ...

 

You better have 2 or 3 sets of straps holding it down...That would shoot your car off the dyno like a rocket...

 

Well, I did not mean to emergency break with both feet on the pedal The car is strapped down securely anyways. Just a slight breaking will do it.

BTW: strap it down harder and it will have more losses as well.

 

Tim, shame on you for biting. The idea of building an engine with improved VE is crazy!! You better stick to "bolt on's".

Clearly the mods you have made to your engine would be no good on a road course

 

tell us about magic markski 3073s

 

How did "magic" markski get roped into this? I thought Sambo was pushing the 3073's?

 

I don't know anything 'bout "magic markski" but I could tell you a thing or

two about magic mushrooms circa 1978 - 1981

After researching builds, I noticed a definite pattern of reliability

issues with setups producing more then 800 - 850 whp.

Some are more reliable then others but overall, like all cars, the 996TT

reaches a "critical mass" of performance and going beyond that, doesn't

lend itself to daily drivability. Not to say that all of this can't be figured

but at some point we gotta look at "cost vs. benefit"

The 3073s work based on these observations. With some gearing and

weight reduction, I think it's gonna be pretty good.

By the way, Markskis not involved with this build.

 

isn't that 600? give or take.. though folks with more power will always tell you differently? i mean issues always crop up, whether it's blown mafs from raised rev limiters ( though johnspd in here has never had that happen lol ( beat ya to it john! ).. but then there's mafless tunes, and then you're into other stuff, so at what point does one "call it a day" with a balance of power vs daily driveability? do 800+ hp tt's drive well in traffic and stop/go whatever? as they do on a track? dumb questions perhaps.. but i've always wondered.

 

I have a mafless tune by Protomotive and HTA3076.My car runs like OEM.The only problem is the extra loud 3' exhaust
I m very happy with my setup, I m waiting the second file from Todd to turn the boost up.Right now I have only 0,9bar.

 

i had spoken with them about that recently. haven't done anything about it.. since there's nothing "wrong" with the tune i have now. it's just old. but just bailing on the maf might well be worth the price of a new tune.