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Custom tuning w/ By Design - lots of power - need new clutch

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997 Turbo / GT2 20062012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.

Custom tuning w/ By Design - lots of power - need new clutch

 
  #166  
Old 07-27-2018, 03:16 PM
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Originally Posted by 08957 View Post
Dont you have access to some race gas? 5 gallons of 100 octane unleaded in every tank would be cheap insurance agsinst a disaster. Pump gas is vety unreliable. While the factory ecu does have a lot of protection systems built in i would personally not push the envelope without the saftey margin of some race gas in the tank or a good alcohol injection system with a fail safe like aquamist
Nope, no access to racegas. My tune currently has minimal knock sensor activity anywhere in the range so the car has lots of room to protect itself. I know what moderate knock feels like: when I was getting my 68s datalogged there was no mistaking the way the car feels with multiple 6's on the datalog! Haven't had a bad batch of gas locally in the years I've had the car and this current tune is smoooooth.
 
  #167  
Old 07-27-2018, 03:26 PM
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Originally Posted by The Bogg View Post
Nope, no access to racegas. My tune currently has minimal knock sensor activity anywhere in the range so the car has lots of room to protect itself. I know what moderate knock feels like: when I was getting my 68s datalogged there was no mistaking the way the car feels with multiple 6's on the datalog! Haven't had a bad batch of gas locally in the years I've had the car and this current tune is smoooooth.
no access to race gas that is impossible.
I am sure you can souce some 5 gal containers of 100 octane just about anywhere.

Everyone has his / her own comfort level No way would i apporach 90% of the Rods bending capacity on staight pump gas. Over the years i have seen way too many engines fail from that scenario. There is a reason why they limit the stock cars to 480 crank hp. Because they have a warranty and a reputation to protect against poor fuel quality. The same system that protects you at 480 crank is not going to protect you at 850 crank and above if you pick up bad gas
 
  #168  
Old 07-27-2018, 03:54 PM
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Originally Posted by turboslut
Definitely one of my favorite threads!

M3_Maestro...have you ever messed wit the F10 M5? I see a few coming off hard down to the $35k-$45k price range and was thinking about getting one. PM me so this doesn't turn into a thread jack.
Hey bud, no I haven't. I have only reviewed data on 1 of those for a tuner that wanted my opinion on how the turbos were doing. So other than looking at logs no hands on. The logs I saw it was making some power
 
  #169  
Old 07-27-2018, 04:01 PM
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Lets at least keep this topic about Porsche tuning and avoid the discussion of other Brands - (although I used to own a 91 M5 and it was just about the best car you could buy IMHO)
 
  #170  
Old 08-11-2018, 07:55 PM
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Thanks to Stef for doing such a great job modifying my stock tips to fit the giant 76mm tips on the EP2 system which I just installed

Here is a before and after of the outlet pipes of the 60mm stock tip size EP1 system which was making 750 whp and the

EP2 with 76 mm outlet pipes

And with the modified stock tips installed on the full 3" system

My new EP 2 system fit just as perfectly as the EP 1 system - simply put these systems are the best exhaust systems I have seen in 35 years of car modification




 
  #171  
Old 08-11-2018, 08:48 PM
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Awesome!!
 
  #172  
Old 08-12-2018, 10:05 AM
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Looking good bud! Can’t wait to finalize and finish her off for you.
 
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  #173  
Old 08-12-2018, 10:29 AM
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Originally Posted by IMI A View Post
Be interesting to hear if you make a bit more power with the EP2. Its identical to EP1 other than the exit pipes.

See if you can get 60-130mph too. You should be able to consistently dip just below 6 secs at that power level
I do not think it is about power as we are close to the limit of my power objective if not already over it at this point already
A lot of people who are tuning cars only keep in mind peak power levels without regard for what is going on in the system which I have repeated from my early learnings which in a turbo charged car is like a giant air pump. Obviously you have limitations at the weak links in the system

Upon getting more involved with VTG modified 997's it has become very clear to me that the number one problem / restriction in the system is the huge amount of back pressure before the turbine which can run upwards of 55 psi in some applications or a ratio of well over 2 times the boost level being compressed into the engine

As you start to get up over 600 whp a 2.38" tube per side is going to create additional back pressure - keep in mind the specifications from Europipe which measure the difference between the EP1 and EP2 are conducted on a stock vehicle

Obviously the EP1 is capable of producing a lot of power for a catted system as I have demonstrated

This change is less about turning up the power level - trying to make more power or boosting any of the tuning parameters

Rather, my objective is to simply lower the backpressure by a few psi on the discharge side and by doing so pick up VE on the engine set up by allowing more complete expulsion of exhaust gasses and create a more stable combustion event with less unspent exhaust charge left in the cylinder between cycles

Of course the trade off here for this is slightly more noise - yet to be determined

Will have more to report when I get the car on the road - it has been raining here and this car never goes in the rain
 
  #174  
Old 08-26-2018, 05:35 PM
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Picking up a little more power with the full 3" exhaust as we work to refine the tuning - I must admit that I do not drive the car very often so my tuning progress is going very slow - I will try to make it out to the track this season once it gets too cold for boating
 
  #175  
Old 08-26-2018, 07:06 PM
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755WHP!

Very nice!!
 
  #176  
Old 08-27-2018, 07:30 AM
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That is awesome. The car has to move out!

If you don't mind, what kind of manifold pressure is that at? I just got my car back up and running with the 68mm units from By Design. On the base 93 octane tune, it pulls very strong. At your power levels has to be a rocket ship.
 
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Old 08-27-2018, 08:33 AM
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Originally Posted by 86merc View Post
That is awesome. The car has to move out!

If you don't mind, what kind of manifold pressure is that at? I just got my car back up and running with the 68mm units from By Design. On the base 93 octane tune, it pulls very strong. At your power levels has to be a rocket ship.
Hopefully you can post a pumpgas dyno graph after Sam has tweaked your tune.
 
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Old 08-27-2018, 08:55 AM
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Originally Posted by The Bogg View Post
Hopefully you can post a pumpgas dyno graph after Sam has tweaked your tune.
I have a few AWD dynos around here that I can use. So I will get something eventually for sure. Hopefully graphs for both 93 and e85. I have the Klein 3" to 2.5" exhaust on my car. So as discussed, that may or may not hold me back some. lol
 
  #179  
Old 08-27-2018, 09:44 AM
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Car is looking great 08 and set up doing well!

Hey 86 I’m on yours this morning. Cant wait till you feel the E85 tune! About 20 or 30 of the cars I have done with your exact set up to do the same and go all the way up through redline. We try to hang tight right around 750 peak and though at our higher level keep things in our comfort zone. I know Eric will want more haha!
 
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  #180  
Old 08-27-2018, 05:48 PM
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Also a 68mm By-Design user here!

Just trying to gauge where I'm at in my Tuning.
What Boost, MAF g/s and Ignition advance are you running?
I'm not on E85, but my Meth and MS109 should make up for it slightly.

I've been stunted on getting my tunes nailed out, Between Travelling and rain, it's been a hard year of trying to get some good datalogs!
 

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