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My mods w/Dyno Dynam. vs Dyno Jet graphs...need plenum help too!!! Please LOOK!

Old Aug 25, 2007 | 10:46 AM
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Default My mods w/Dyno Dynam. vs Dyno Jet graphs...need plenum help too!!! Please LOOK!

My Mods:

Hks TD with Aps Test pipes
Mrev-2 w/5/16 copper spacer
JWT Intake
Utec

1st graph: Dyno Jet w/stock and after mods and a tune...

2nd graph: Dyno Dynamics mods on w/no tune and then w/a tune...utec was turned off...Correction factor I believe was 1.1...not sure if that helps.

P.s: the a/f in the 1st graph broke..in between runs..and in my second run it was rich in the pk tq area and then leaned out to around 12.1 by 6-6.5k...









Heres my questions:

1. Doesnt a Dyno Dynamic dyno typically read lower then a dyno jet ?..
2. It seems that the plenum combo I have does well in the mid range..but I'd really like something that made power up top...Would a Kinetix or Crawford or any other plenum option keep my mid and give me more up top ?....
3. Lastly these runs were all done in 4th gear...Does that mean that the total hp number would be higher or lower if it were done in 5th ?...


Thanks..any tips are appreciated.
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Old Aug 25, 2007 | 10:48 AM
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Im just not pleased w/the way the power drops off..I know its still more in both cases/dynos..but Id like to see it rise like it did stock...

Any issues you guys see ?...
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Old Aug 25, 2007 | 10:52 AM
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You should have done the dyno in 5th..
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Old Aug 25, 2007 | 10:58 AM
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I knew It shouldve been..but they didnt want too....why what would the diff have been..?
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Old Aug 25, 2007 | 11:02 AM
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They prob didnt wanna put stress on their dyno.. *****es..

5th usually yeilds more power and its 1:1 on a 6 gear vehicle.. A tuner GOD told me so..
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Old Aug 25, 2007 | 11:23 AM
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absolutely correct on the 5th gear thing.
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Old Aug 25, 2007 | 11:26 AM
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Originally Posted by genegoesfast
absolutely correct on the 5th gear thing.
I like that mod in your SIG.. "Sharif tune" I got one of those too..
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Old Aug 25, 2007 | 02:26 PM
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I wish I was closer to Ga...When and If I go F.I, that is where I will ship it...
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Old Aug 25, 2007 | 02:29 PM
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Originally Posted by 13SECZ
I wish I was closer to Ga...When and If I go F.I, that is where I will ship it...
Man.. Just drive there.. **** I just did it and Im just as far or further.. And I went there just to say hi practically.. lol
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Old Aug 25, 2007 | 06:48 PM
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1. Doesnt a Dyno Dynamic dyno typically read lower then a dyno jet ?..
Yes, typically, but not necessarily.

2. It seems that the plenum combo I have does well in the mid range..but I'd really like something that made power up top...Would a Kinetix or Crawford or any other plenum option keep my mid and give me more up top ?....
Not really. You could remove the MREV and put back the stock REVUP manifold to make a little more near redline, but the average power per gear will be lower even if you shift at redline. And then there will also be a very substantial loss of midrange. This is about the limit of simple bolt on's.

The next thing to do is headers. They will clearly add more power near redline. This is your last ,somewhat easy, option. Then there is cams... but you know what that means. Time & $$$.

3. Lastly these runs were all done in 4th gear...Does that mean that the total hp number would be higher or lower if it were done in 5th ?...
One of the tuners can better answer this one for you.

Tony

Last edited by Hydrazine; Aug 25, 2007 at 09:00 PM.
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Old Aug 25, 2007 | 07:50 PM
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Re: tuning gear:

For all cars - you want the 1:1 gear - it's the gear to test and tune in - but:

For AT's - you may want to compare 3rd gear, as the torque converter doesn't fully lock up in 4th - and it's 'better' in 3rd. The difference in results between the 2 gears is about 1%-3% - I'd rather have my numbers be lower, and be able to beat others - it's a great WOW factor there, and your tuner and you will end being more respected. Having a show off higher number, and loosing to those you should beat...well that can come back to you.

For MT's - you should do 5th gear, the 1:1 gear in a 6MT. There's no TQ converter to give you a problem with.

Any tuner that tells you to use a gear other than the 1:1 gear - is trying to show you more HP that you are really getting...to make you happier with your mods. In fact, if you asked them, they would likely tell you that the numbers will be higher if they dyno in 3rd gear - REMEMBER - your not after numbers, your after a properly tuned car. Numbers mean nothing - the actual race does.

The bottom line is - if it is tuned properly to begin with, to it's maximum power and tq with proper A/F ratios and timing - the HP readout means nothing - unless your trying to Dyno Drag Race and have bragging rights.

Rick
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Old Aug 25, 2007 | 08:23 PM
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5th gear is 1-1 correct.However on a Dyno Dynamics, the gear you choose to do the pull in be it 4th or 5th is not as critical to HP output. I dont know whay, thats just the way it is.
As far as the power dropping up top on the "after" tune, it confuses me, cause generally the mods you have add power up top also. Did they do the Dyno Dynamics in the Gear ratio mode where they dont use a tach signal and just use an rpm/gear ratio to get the RPM axis?If they did this, they may have changed the ratio towards the end and the chart moved more towards the left of the RPM band.
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Old Aug 25, 2007 | 08:28 PM
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Another thing I noticed is:
1) Why did they start the 1st dyno at 3500 rpms?
2)Why did they rev the 1st dyno to over 7000 rpms?The VQ with stock cams and heads does not geneally make power past 6200, it falls of there.

3)Why was the last dyno started much lower than the
1st one at 2000rpms?

Something seems a bit off IMO on the charts.
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Old Aug 25, 2007 | 11:11 PM
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Im not sure why the dynos were started at different rpms....i know the car seems to run good....only a track can truly seem acurate for a positive outcome....267 and 260 ish tq seemed good on that dyno numbers wise.....i just wish my power didnt drop off so dramatically near redline....thought maybe i didnt make the right choices in na mods......is my my guy the BEST Z tuner...maybe not but i thinkl based on the second graph hes not bad..i made more power after then whe i came in.......

Jus wondering if theres more on the table...but i guess iLl never know...headers are not an option.....gonna do f.i.....so
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Old Aug 26, 2007 | 08:12 AM
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Originally Posted by 13SECZ
Im not sure why the dynos were started at different rpms....i know the car seems to run good....only a track can truly seem acurate for a positive outcome....267 and 260 ish tq seemed good on that dyno numbers wise.....i just wish my power didnt drop off so dramatically near redline....thought maybe i didnt make the right choices in na mods......is my my guy the BEST Z tuner...maybe not but i thinkl based on the second graph hes not bad..i made more power after then whe i came in.......

Jus wondering if theres more on the table...but i guess iLl never know...headers are not an option.....gonna do f.i.....so
We would be able to tell if there is more on the table.Let me know if you wish to set up a dyno appointment.
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Old Aug 26, 2007 | 08:22 AM
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,...also wondering if the 1/2 spacer would yield more uptop then the 5/16 i really wanna see a full bolt on revup with the 1/2 spacer and mrev2 . Is there any strut bar that clears the 1/2 spacer?.


Also try dynoing without the pop charger, i have not seen any benefits of the pop charger in the 06 models due to the awesome stock airbox already.
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Old Aug 26, 2007 | 08:24 AM
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1.1 correction I believe is 10% added onto the real DD numbers...
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Old Aug 26, 2007 | 12:53 PM
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Originally Posted by Alberto
1.1 correction I believe is 10% added onto the real DD numbers...
I have noticed that different Dyno Dynamics in different regions correct differently when attempring to simulate DJ numbers. Based on a recent Dyno one of Sharif's customers posted, it shows only a 7% lower varience on his dyno than the local Dyno jet from his actual DD numbers.
Our dyno seems to be within 1-2% of the closest Dyno Jet, when we apply the correction. Im assuming the altitude and current Barometer have alot to do with it.We are actually very close to sea-level at our facility.
The place the OP went may be at a higher level.
Our dyno also seemed to be within 3 WHP of AAM's dyno with several customers, including my own car.
In the end a dyno is a tool, not to be held as perfect.
In my opinion a car with no tune that revs higer than the car tuned, seems a bit off to me. Perhaps there is more to be done tunning wise on the OPs car.
I know there was one guy on our Dyno day that was tuned at another facility and the car made decent power, but we tweaked the map for free and in 5 minutes mad another 13whp.
I think it all comes down to the tuner and his familiarity with the specific car and equipment. For example, I can tune a VQ motor inside and out, put me on a Honda motor and I would probably not make as much HP as someone familiar with Hondas.
Once the basic principles of tuning a car for optimal power are applied, there comes the tricks and experience of each tuner and the platfor they like to "specialize " in .
Hope this helps, in some way..
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Old Aug 26, 2007 | 01:03 PM
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Here is an example of a car we retuned that was previouslt tuned at another facility.The car was an automatic with all bolt ons, cams,heads,TQ converter,and Tranny upgrade. The car made 265 whp on a Dynojet previously and baselined around 235 on my dyno. This dyno dictates an "UNCORRECTED" Dyno Dynamics number before and after on my dyno.This is RAW DD numbers, no correction whatsoever.The car with a little tuning was a beast and corrected to about 283whp.
Look at the 5200rpm area where we made alot more power and TQ than the other place, and then look at the 6500rpm area where the power increased and stayed strong.
These were baseline to post tune at our shop.
The customer was VERY HAPPY!!!He drome all the way from Mass. and was rewarded with alot more HP!!To date this is the highest N/A Automatis or 6MT we have seen on our Dyno..
Attached Thumbnails My mods w/Dyno Dynam. vs Dyno Jet graphs...need plenum help too!!! Please LOOK!-glen3.jpg  
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Old Aug 26, 2007 | 02:05 PM
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Huh..nice work...I wondered about the bigger spacer..but most said it would yield maybe 5hp...but you never know till you try it. Also I thought about putting a k&n w/my stocker..but I havent done it yet...didnt think the charger was hurting me...

I dont believe in dyno numbers either..but its just a comparison of no tune, tune, and diff. dynos..I 100% agree w/vq tuners working on vq motors...I wish I had orginally came down to MRC...Closest place to me that does specialize in Z's...I think I still want to come down....if we can work out a deal...I think it would be worth it...you have a PM..
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