Motordyne 5/16" spacer = loss of power??
02-16-2006, 12:57 PM
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It is impressive you noticed lowend loss without a dyno! Maybe the spacer isn't sealed well or your ECU is confused? You could tune it for optimal A/F mixture. Or you could save up and leap frog to Stillen's SC. After reading your post I'm leaning towards the latter. 
02-16-2006, 01:16 PM
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Originally Posted by dream724Z
It is impressive you noticed lowend loss without a dyno! Maybe the spacer isn't sealed well or your ECU is confused? You could tune it for optimal A/F mixture. Or you could save up and leap frog to Stillen's SC. After reading your post I'm leaning towards the latter.
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02-16-2006, 01:41 PM
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Originally Posted by Hydrazine
For all the dynos I've done or seen, It never loses power anywhere in the RPM band. It only gains in HP and TQ.
02-16-2006, 01:43 PM
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Originally Posted by showstoppertk
wow, a human dyno.
02-16-2006, 02:13 PM
#10
I don't doubt that you feel a difference, but to claim that you've lost low end power due to installing a part based on a butt dyno is gonna offend some. I know if I was selling/manuf. this product and someone went and said it decreased power I would expect some proof. the fact is many forum members have installed and used this product with success and gotten dyno proven gains in both hp and tq.
02-16-2006, 02:19 PM
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Originally Posted by showstoppertk
I don't doubt that you feel a difference, but to claim that you've lost low end power due to installing a part based on a butt dyno is gonna offend some. I know if I was selling/manuf. this product and someone went and said it decreased power I would expect some proof. the fact is many forum members have installed and used this product with success and gotten dyno proven gains in both hp and tq.
02-16-2006, 02:44 PM
#12
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I can relate to this; I too felt the exact symptoms as you did. I felt that there was a possibility I lost some torque down low (my a$$ told me so) But i have gain a **** load on top. The car pulls unreal all the way to redline now.
To me even if i did loase so TQ down low it is a good trade off anyway, seeing as though all spirited driving is up top.
If you have just installed it give some time let things adjust.
PS: I agree with the uneccesay sarcasm. He merely voiced his concerns and needed some advice or someone that could of maybe related.
Afterall please don't forget why we are all on this forum.
To me even if i did loase so TQ down low it is a good trade off anyway, seeing as though all spirited driving is up top.
If you have just installed it give some time let things adjust.
PS: I agree with the uneccesay sarcasm. He merely voiced his concerns and needed some advice or someone that could of maybe related.
Afterall please don't forget why we are all on this forum.
Last edited by 350ZTrackspec; 02-16-2006 at 02:47 PM.
02-16-2006, 03:04 PM
#13
The Tech,
Could you be using any type of CAI?... They sometimes cause strange things to happen to the power curve... and even more so when plenum mods are installed. They can create peaks and dips in the power curve. Almost as if the CAI was aliasing in phase and out of phase with the engine RPM (frequency).
If no CAI is installed, try a test.
Take the spacer off to see what difference it makes.
If you are still sure about a loss in TQ, take your car to the nearest dyno shop and get a baseline dyno. While your car is still on the dyno, reinstall the spacer and do another set of pulls to measure the difference.
Beyond normal dyno error, if your car loses power anywhere on the HP or TQ curve, I'll pay for your dynos.
For all the dyno curves I've seen during research and development and at various dyno days, so far, its only been gains.
Tony
Could you be using any type of CAI?... They sometimes cause strange things to happen to the power curve... and even more so when plenum mods are installed. They can create peaks and dips in the power curve. Almost as if the CAI was aliasing in phase and out of phase with the engine RPM (frequency).
If no CAI is installed, try a test.
Take the spacer off to see what difference it makes.
If you are still sure about a loss in TQ, take your car to the nearest dyno shop and get a baseline dyno. While your car is still on the dyno, reinstall the spacer and do another set of pulls to measure the difference.
Beyond normal dyno error, if your car loses power anywhere on the HP or TQ curve, I'll pay for your dynos.
For all the dyno curves I've seen during research and development and at various dyno days, so far, its only been gains.
Tony
02-16-2006, 03:56 PM
#14
Originally Posted by Hydrazine
The Tech,
Could you be using any type of CAI?... They sometimes cause strange things to happen to the power curve... and even more so when plenum mods are installed. They can create peaks and dips in the power curve. Almost as if the CAI was aliasing in phase and out of phase with the engine RPM (frequency).
If no CAI is installed, try a test.
Take the spacer off to see what difference it makes.
If you are still sure about a loss in TQ, take your car to the nearest dyno shop and get a baseline dyno. While your car is still on the dyno, reinstall the spacer and do another set of pulls to measure the difference.
Beyond normal dyno error, if your car loses power anywhere on the HP or TQ curve, I'll pay for your dynos.
For all the dyno curves I've seen during research and development and at various dyno days, so far, its only been gains.
Tony
Could you be using any type of CAI?... They sometimes cause strange things to happen to the power curve... and even more so when plenum mods are installed. They can create peaks and dips in the power curve. Almost as if the CAI was aliasing in phase and out of phase with the engine RPM (frequency).
If no CAI is installed, try a test.
Take the spacer off to see what difference it makes.
If you are still sure about a loss in TQ, take your car to the nearest dyno shop and get a baseline dyno. While your car is still on the dyno, reinstall the spacer and do another set of pulls to measure the difference.
Beyond normal dyno error, if your car loses power anywhere on the HP or TQ curve, I'll pay for your dynos.
For all the dyno curves I've seen during research and development and at various dyno days, so far, its only been gains.
Tony
02-16-2006, 04:27 PM
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Originally Posted by THE TECH
Not sure what's up with everyone and the sarcasm. I know for a fact everyone doesn't run out and dyno their cars after every mod they put on. You don't always need a dyno to tell you what's going on with your car.
That way I know my baseline #'s before and after each and every time.Here are my improvement dyno #'s with the 5/16 spacer: My HP increased by 10.4 and my TQ increased by 6.9.
Even before I dyno'd my car I could tell there was an increase in power. Best bang for the buck, besides nitrous.
Kudos to Tony and his great customer service.
-Bootay
02-16-2006, 04:41 PM
#16
First, my hat off to Tony for handling this issue like someone who believes in his product and is willing to stand behind it.
So here is my non-professional 2 cents: I installed my 5/16" spacer a few weeks ago and reset my ECU in the process by disconnecting the battery for almost 24 hours. My car also has a JWT pop-charger.
For the first couple hundred miles, I could not really feel the extra power, and I was almost questioning if I had not maybe lost a little (all by the seat of my pants, highly subjective). However, now that I have several hundred miles since my mod, I feel like I do have extra power. My car now seems to haul butt.
So my question to "The Tech" is how many miles have you driven since the mod?
My question to Tony is: does the ECU have an adaptation period after the mod?
So here is my non-professional 2 cents: I installed my 5/16" spacer a few weeks ago and reset my ECU in the process by disconnecting the battery for almost 24 hours. My car also has a JWT pop-charger.
For the first couple hundred miles, I could not really feel the extra power, and I was almost questioning if I had not maybe lost a little (all by the seat of my pants, highly subjective). However, now that I have several hundred miles since my mod, I feel like I do have extra power. My car now seems to haul butt.
So my question to "The Tech" is how many miles have you driven since the mod?
My question to Tony is: does the ECU have an adaptation period after the mod?
02-16-2006, 04:52 PM
#19
ShowstopperTK,
Its cool and even understandable.
So many of these plenum spacers have been installed that given the bell curve of subjective butt dynos, some are bound to appear as a loss. That's just to be expected with so many subjective evaluations.
And I won't say its not possible, I just havn't seen a dyno show a loss. All the independant dynos posted have all shown only positive gains, so its OK.
I'm sure that even in this case the strong probability is that it only makes gains and with a good probability to be in the 11-13 HP range.
YellowStealth,
Sometimes yes and sometimes no. I've seen both. And yes, I have seen some variation in the results for the same mod on different cars. The MREV for example has never dynod below 15.6 HP but I advertise it as a 15+ HP mod. Some independant dynos have shown as much as 22HP and 30 TQ on the MREV+. Different cars can have different results.
Its cool and even understandable.
So many of these plenum spacers have been installed that given the bell curve of subjective butt dynos, some are bound to appear as a loss. That's just to be expected with so many subjective evaluations.
And I won't say its not possible, I just havn't seen a dyno show a loss. All the independant dynos posted have all shown only positive gains, so its OK.
I'm sure that even in this case the strong probability is that it only makes gains and with a good probability to be in the 11-13 HP range.
YellowStealth,
Sometimes yes and sometimes no. I've seen both. And yes, I have seen some variation in the results for the same mod on different cars. The MREV for example has never dynod below 15.6 HP but I advertise it as a 15+ HP mod. Some independant dynos have shown as much as 22HP and 30 TQ on the MREV+. Different cars can have different results.
Last edited by Hydrazine; 02-16-2006 at 05:03 PM.
