A running pictorial of my monster Protomotive build
Registered User
Joined: Jun 2006
Posts: 1,595
From: NY
Rep Power: 331
Originally Posted by WOODTSTER
HOLY DAMN **** !!!
And that is Rear Wheel Horsepower, that car is going to kick some
*** when it hooks up!
Congrats Todd and Scott,
Marty K.
And that is Rear Wheel Horsepower, that car is going to kick some
*** when it hooks up!
Congrats Todd and Scott,
Marty K.
.
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Joined: Jul 2003
Posts: 2,803
From: Missing in action
Rep Power: 214
Scott,
I have a question (which you may or may not be able to answer). You gained an astonishing 250 HP between .8 bar and 1.36 bar (an increase of .56 bar). That's over 40 HP for every .1 bar. In contrast, I vaguely recall that Markski picked up approximately 170 HP between .8 bar and 1.5 bar (a .7 bar increase). That's approximately 25 HP for every .1 bar. Given that Markski has larger turbos, larger heads/valves and a higher rev limiter, I would expect him to pick up more power than you as boost is increased. Any idea why you pick up so much more power than Mark?
Craig
I have a question (which you may or may not be able to answer). You gained an astonishing 250 HP between .8 bar and 1.36 bar (an increase of .56 bar). That's over 40 HP for every .1 bar. In contrast, I vaguely recall that Markski picked up approximately 170 HP between .8 bar and 1.5 bar (a .7 bar increase). That's approximately 25 HP for every .1 bar. Given that Markski has larger turbos, larger heads/valves and a higher rev limiter, I would expect him to pick up more power than you as boost is increased. Any idea why you pick up so much more power than Mark?
Craig
Originally Posted by Craig
Scott,
I have a question (which you may or may not be able to answer). You gained an astonishing 250 HP between .8 bar and 1.36 bar (an increase of .56 bar). That's over 40 HP for every .1 bar. In contrast, I vaguely recall that Markski picked up approximately 170 HP between .8 bar and 1.5 bar (a .7 bar increase). That's approximately 25 HP for every .1 bar. Given that Markski has larger turbos, larger heads/valves and a higher rev limiter, I would expect him to pick up more power than you as boost is increased. Any idea why you pick up so much more power than Mark?
Craig
I have a question (which you may or may not be able to answer). You gained an astonishing 250 HP between .8 bar and 1.36 bar (an increase of .56 bar). That's over 40 HP for every .1 bar. In contrast, I vaguely recall that Markski picked up approximately 170 HP between .8 bar and 1.5 bar (a .7 bar increase). That's approximately 25 HP for every .1 bar. Given that Markski has larger turbos, larger heads/valves and a higher rev limiter, I would expect him to pick up more power than you as boost is increased. Any idea why you pick up so much more power than Mark?
Craig
mark
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Registered User
Joined: Aug 2005
Posts: 71
From: Ozark Moutains, Arkansas
Rep Power: 30
Craig,
On Markski's we saw 871.63 at 21.5psi of boost, 1.48bar, and 685.16 at 14psi, .964bar
So... (871.63-685.16)/(21.5-14)= 24.86hp/psi increase, which is quite typical... We've seen up to 30 when the engine hits a sweet spot. Or to convert to .1bar would be 24.86hp/psi x 14.511psi/bar / 10 for .1 bar inc. = 36.07hp/.1 bar.
From 14 to 16psi it was (733.97-685.16)/(16-14)=24.405hp/psi, or 35.41...
On Scott's, we're seeing incremental increases as well, from 16.73 to 18.48psi, it ran 735.6 to 782.6hp, or 26.85hp/psi, or 38.97hp/.1bar.
From some of the lower boosts to the mid to high there were larger increases, some smaller... From 18-20psi, there wasn't that good of an increase due to the compressors running out of flow. They're only 52lb compressors, good for 104lbs for both. We typically see around 9.25hp/lb on these engines, and we netted a little more than that... 9.38 on this one, so 104 x 9.38 gave us a total of around 976hp to the crank. I thought we'd only get maybe 925-950 for around 780 to the tires, but it's pretty happy on rpm's. Notice, we're not making the tremendous torque you see on some other dyno sheets published because we're just not requiring that much boost to hit these power numbers.
Vralexanders engine did similar things.. From low boost numbes, the efficiencies were good, but not great, but as the boost went up, the fuel got happy and it increase in efficiency till we ran out of fuel...
On Markski's we saw 871.63 at 21.5psi of boost, 1.48bar, and 685.16 at 14psi, .964bar
So... (871.63-685.16)/(21.5-14)= 24.86hp/psi increase, which is quite typical... We've seen up to 30 when the engine hits a sweet spot. Or to convert to .1bar would be 24.86hp/psi x 14.511psi/bar / 10 for .1 bar inc. = 36.07hp/.1 bar.
From 14 to 16psi it was (733.97-685.16)/(16-14)=24.405hp/psi, or 35.41...
On Scott's, we're seeing incremental increases as well, from 16.73 to 18.48psi, it ran 735.6 to 782.6hp, or 26.85hp/psi, or 38.97hp/.1bar.
From some of the lower boosts to the mid to high there were larger increases, some smaller... From 18-20psi, there wasn't that good of an increase due to the compressors running out of flow. They're only 52lb compressors, good for 104lbs for both. We typically see around 9.25hp/lb on these engines, and we netted a little more than that... 9.38 on this one, so 104 x 9.38 gave us a total of around 976hp to the crank. I thought we'd only get maybe 925-950 for around 780 to the tires, but it's pretty happy on rpm's. Notice, we're not making the tremendous torque you see on some other dyno sheets published because we're just not requiring that much boost to hit these power numbers.
Vralexanders engine did similar things.. From low boost numbes, the efficiencies were good, but not great, but as the boost went up, the fuel got happy and it increase in efficiency till we ran out of fuel...
Registered User
Joined: Jan 2006
Posts: 5,710
From: MPLS, MN USA
Rep Power: 466
The mad scientist has spoken,
take advantage and soak it up. I learned more in my overnight
stay at Protomotive about turbocharging than I have in all my time
spent on Rennlist/6speed combined. Good stuff!
thanks Todd!
MK
take advantage and soak it up. I learned more in my overnight
stay at Protomotive about turbocharging than I have in all my time
spent on Rennlist/6speed combined. Good stuff!
thanks Todd!
MK
Thread Starter
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Registered User
Joined: Jun 2005
Posts: 8,509
From: Virginia, USA
Rep Power: 789
Dyno tuning is complete. The car made an amazing 830 rwhp / 780 rwtq at only 1.41 BAR...where the turbos finally ran out of boost.
Here's the graph of my final numbers overlayed over Jamie's for comparison. Jamie is at 1.5 BAR, I'm at 1.41 BAR.
Here's the graph of my final numbers overlayed over Jamie's for comparison. Jamie is at 1.5 BAR, I'm at 1.41 BAR.
Last edited by Divexxtreme; May 9, 2007 at 07:50 PM.
Registered User
Joined: Apr 2006
Posts: 1,346
From: 19454
Rep Power: 90
Great numbers Scott. You know everyones waiting for that 9.xx pass. Im personally more interested in what your going to trap in the 1/4.
So, did you run out of fuel or did higher boost produce nothing more(I thought 3076's could take a little more than 1.5 bars? no?)
Redline is 7600?
Thanks.
So, did you run out of fuel or did higher boost produce nothing more(I thought 3076's could take a little more than 1.5 bars? no?)
Redline is 7600?
Thanks.
Thread Starter
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Registered User
Joined: Jun 2005
Posts: 8,509
From: Virginia, USA
Rep Power: 789
Ran out of turbo. The motor is so efficient, they ran out of steam much earlier than we expected. Plenty of fuel left.
I could always switch to GT35's and make another 70 rwhp or so...but we want to see how the GT30's are on the street and strip...where it really matters.
Redline is 7,800. The turbos stop making power past that point, so there's no reason to go higher.
Car should get some time on the strip in Tulsa this weekend. I'll have her shipped home next week.
I could always switch to GT35's and make another 70 rwhp or so...but we want to see how the GT30's are on the street and strip...where it really matters.
Redline is 7,800. The turbos stop making power past that point, so there's no reason to go higher.
Car should get some time on the strip in Tulsa this weekend. I'll have her shipped home next week.
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Joined: Oct 2004
Posts: 575
From: Southeast
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Scott,
This is absolutely awesome and you must be thrilled. Be careful with this thing. Can't wait to see this thing run. I am going to stick my neck out and guess this car lays down a 9.85 at the strip. This will require some fine launching and throttle control on your part. I can only imagine how this thing pulls. This Todd gentlemen is truly cutting edge for building these custom setups. I like it when things work without having to blow **** up several times while learning. Enjoy my friend and stay safe.
This is absolutely awesome and you must be thrilled. Be careful with this thing. Can't wait to see this thing run. I am going to stick my neck out and guess this car lays down a 9.85 at the strip. This will require some fine launching and throttle control on your part. I can only imagine how this thing pulls. This Todd gentlemen is truly cutting edge for building these custom setups. I like it when things work without having to blow **** up several times while learning. Enjoy my friend and stay safe.