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

Another USP E85 ethanol conversion on the dyno!!

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Old Aug 19, 2010 | 09:44 AM
  #31  
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Originally Posted by Sunnyside
Can the system be run with just water and no meth... ie tuned on the rollers to do so. Would it still give good results.
I'm running k16's with standard I/C's but a revo stage 2 tune and 100 cell Miltek exhaust.
Frank
This is a fuel system not an add on meth system. its doesnt run pump gas. Its runs strait E85.
 
Old Aug 19, 2010 | 09:49 AM
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Sorry
Frank
 
Old Aug 29, 2011 | 03:48 PM
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Chris,
I just sent you an email in regards to an E85 systems.
Thanks
 
Old Aug 29, 2011 | 04:39 PM
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chris pmed you i forgot i also am running evo how much thanks steve ics
 
Old Aug 29, 2011 | 04:49 PM
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so i go down to my local station and fill up with E85 amd thats the deal no water injection... just googled e85 sez it,s 85 cents a gal. can this be true
 
Old Aug 30, 2011 | 12:39 PM
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Does are fuel system components handle the E85 fuel mix,as far they will not deteriorate??
 
Old Aug 30, 2011 | 06:22 PM
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can i stiil use 100 oct fuel if E85 is not to be found ???
 
Old Sep 1, 2011 | 09:06 AM
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Originally Posted by steve harris
can i stiil use 100 oct fuel if E85 is not to be found ???
No way... gas and e85 are not even close when it comes to AIR/FUEL ratios.
 
Old Sep 1, 2011 | 05:05 PM
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Great jojojojojo
 
Old Sep 1, 2011 | 09:25 PM
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Chris,

Fantastic numbers. Quick question -- how close are we to having a usable 'flexfuel' style setup (if at all?). I'd love to have the ability to run e85, I have a pump a mile away... but that's the only station for like 100 miles in any direction. I'd probably run out of gas before I could get to another, and it certainly wouldn't be easy to take a trip anywhere.

Even if the answer were to reflash via a cable that would probably work well enough... thoughts?
 
Old Sep 1, 2011 | 09:36 PM
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Originally Posted by vr4henry
Chris,

Fantastic numbers. Quick question -- how close are we to having a usable 'flexfuel' style setup (if at all?). I'd love to have the ability to run e85, I have a pump a mile away... but that's the only station for like 100 miles in any direction. I'd probably run out of gas before I could get to another, and it certainly wouldn't be easy to take a trip anywhere.

Even if the answer were to reflash via a cable that would probably work well enough... thoughts?
It's already being done with several 997tt cars from Protomotive. I believe KPG's (Evoms) car can switch back and forth. Skeeter is currently building a completely flex fuel 997tt with Switzer.
 
Old Sep 1, 2011 | 09:42 PM
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Originally Posted by TTdude
It's already being done with several 997tt cars from Protomotive. I believe KPG's (Evoms) car can switch back and forth. Skeeter is currently building a completely flex fuel 997tt with Switzer.
Thanks for the tip -- I'll try to dig up what I can on those cars. At least KPGs is a 996, but it's heavily modded so who knows what EVOMS has in there for a tune
 
Old Sep 1, 2011 | 09:49 PM
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Check out Venkatreddy and twturbo. The injector size will determine if you can run both gas and E85.
 
Old Sep 1, 2011 | 10:07 PM
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Chris, I know you and EPL make great products and I am not doubting or in any way question your ability and or that your cars are FAST as hell.

I am seeing though that dynojets typically have this "flat" HP curve. Doesn't look very realistic.

Here is my personal car with the BPU upgrades on K24s dynoed years ago. Dynoed by a third party. Same flat(ish) HP curve... seems to be a hallmark of dynojets. Is this the result of the dynoject not being a load dyno? This could also be the result of tuners not really tuning out but welcoming the torque spike which may result in this flat HP curve.

What are your thoughts on this?

 

Last edited by Turbo Fanatic; Sep 1, 2011 at 10:19 PM.
Old Sep 2, 2011 | 06:08 AM
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Originally Posted by ari
Chris, I know you and EPL make great products and I am not doubting or in any way question your ability and or that your cars are FAST as hell.

I am seeing though that dynojets typically have this "flat" HP curve. Doesn't look very realistic.

Here is my personal car with the BPU upgrades on K24s dynoed years ago. Dynoed by a third party. Same flat(ish) HP curve... seems to be a hallmark of dynojets. Is this the result of the dynoject not being a load dyno? This could also be the result of tuners not really tuning out but welcoming the torque spike which may result in this flat HP curve.

What are your thoughts on this?
My thoughts on this and the original chart posted here.

I don't think there is any issue with the dyno on either setup, just that it appears your setup has been pushed a bit harder (more aggressive boost/timing) nearer to redline, or your turbos are simply more efficient (they are K24's).
Just a guess, though, since I don't know your tune particulars, but your chart looks more typical, with hp kind of climbing as rpms increase.

When I look at the original chart, I see torque peak at about 4600rpm, and peak hp occurring at about 5000rpm, when in a fully tuned setup, peak hp typically occurs nearer to redline.

This leads me to believe there is a bit more left in this setup at the big end, unless the turbos are running out of breath.

Torque spike has nothing to do with a flat HP curve.
That spike can be tuned in or out.

Personally, I always tune to increase torque as redline approaches, but that may not have been possible in this setup (or he is keeping the good stuff for later!)

I'm also guessing he tuned the car to limit torque around 4600 and keep that engine together.

If torque drops hard as rpm's increase, then the hp curve will tend to "flatten" out.
The car goes from 630 torque at 4600 to about 450 torque at 6500rpm, losing nearly 200 lbs in a 2000rpm span.

In a dyno run, the most "force" is being applied at the torque peak.
As rpms increase, "force" drops (not "speed" or "rpm") and the resultant hp curve drops as well.
That's why, if a car can be tuned to increase torque (force) as rpm increases, the result will be a climbing hp curve.

The car should still be a performer, but has a lot left on the table with a better turbocharger.
 


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