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Old 05-21-2015, 01:35 PM   #1
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Low dyno numbers, what could have happened?

I ran dyno yesterday for first time, mods are Jon Lund tune, CAI, Cat and resonator delete, gt500 axleback. It made 337 rwhp and 329 rwtq. It was 100 degrees, 73% humidity here in Miami.

Then I did 150 shot, it went up 148 rwhp 171rwtq.

https://youtu.be/haGKajUFhQc
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Old 05-21-2015, 02:22 PM   #2
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If you were at Ragetek it used to be a low reading dyno. Where was dynoed? What type of dyno?
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Old 05-21-2015, 02:23 PM   #3
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Quote:
Originally Posted by zinc03svt View Post
If you were at Ragetek it used to be a low reading dyno. Where was dynoed? What type of dyno?
Miami, FL it was a DYNOJET
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Old 05-21-2015, 02:26 PM   #4
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I would say the heat probably did not help, but that's low humidity for Miami. I used to live there.

---------- Post added at 02:26 PM ---------- Previous post was at 02:26 PM ----------



Nevermind...saw the sig again.


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Old 05-21-2015, 02:28 PM   #5
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my bad, it was like 73

Quote:
Originally Posted by zinc03svt View Post
I would say the heat probably did not help, but that's low humidity for Miami. I used to live there.

---------- Post added at 02:26 PM ---------- Previous post was at 02:26 PM ----------

Your spraying 150 shot through stock cats?
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Old 05-21-2015, 02:32 PM   #6
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It's one of 2 things.
1. Verry low reading dyno
2. Something is wrong with the car.
I'm going for dyno though. You are making a little more than 30hp more with your 150 shot then I am on motor alone.
So the dyno calibration is off 90% sure. 10% could possibly be the car.

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Old 05-21-2015, 03:20 PM   #7
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Quote:
Originally Posted by Droidman86 View Post
I ran dyno yesterday for first time, mods are Jon Lund tune, CAI, Cat and resonator delete, gt500 axleback. It made 337 rwhp and 329 rwtq. It was 100 degrees, 73% humidity here in Miami.

Then I did 150 shot, it went up 148 rwhp 171rwtq.

https://youtu.be/haGKajUFhQc
Do you have any videos of how your exhaust sounds? I'd love to hear it.
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Old 05-21-2015, 03:55 PM   #8
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Guys put to much faith in dyno numbers. But I'll play.

What gear was it dynoed in?
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Old 05-21-2015, 04:00 PM   #9
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Originally Posted by Grabber Blue5.0 View Post
Guys put to much faith in dyno numbers. But I'll play.

What gear was it dynoed in?
It was done in 5th gear

I don't really care that much about the numbers. Main reason I did dyno was to make sure the 150 show was actually putting down what it advertises and that it would be ready for the track.
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Old 05-21-2015, 04:18 PM   #10
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Low dyno numbers, what could have happened?

Is your car an auto? You can lose as much as 20% through the auto drive train.

337hp sound like stock auto trans number. But if the dyno is down about 10% and with your mods less the nitrous. The 337hp sound about right.


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Old 05-21-2015, 05:11 PM   #11
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These autos do not lose 20% like the old ones and are much more efficient.

And no 337 rwhp doesn't sound even remotely correct.
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Old 05-21-2015, 05:19 PM   #12
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Mine is manual
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Old 05-22-2015, 05:57 AM   #13
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Don't most shops make pulls in 4th gear?


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Old 05-22-2015, 06:56 AM   #14
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Quote:
Originally Posted by ncfive0 View Post
Don't most shops make pulls in 4th gear?


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If they do not know what they are doing.

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Old 05-22-2015, 07:05 AM   #15
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i thought you need it in 1:1 gear? which i thought was fourth gear. of course, ive never been to a dyno and i dont have a 6 speed transmission.
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Old 05-22-2015, 07:08 AM   #16
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i thought you need it in 1:1 gear? which i thought was fourth gear. of course, ive never been to a dyno and i dont have a 6 speed transmission.
You do need it in 1:1, which is 5th gear for the mt -82.

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Old 05-22-2015, 10:16 AM   #17
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You do need it in 1:1, which is 5th gear for the mt -82.

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Exactly what I had to tell everyone at the shop because they would insist I had to do it in 4th.
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Old 05-22-2015, 11:44 AM   #18
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What RPM were you pulling in 5th?
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Old 05-22-2015, 11:48 AM   #19
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What RPM were you pulling in 5th?
I don't know, it was the performance shop employee. I think he slowly change from 1st to 3rd, then 5th WOT
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Old 05-22-2015, 01:49 PM   #20
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I don't know, it was the performance shop employee. I think he slowly change from 1st to 3rd, then 5th WOT
Do you have the dyno sheet..............it will show the curve in HP/TQ and at what RPM????
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Old 05-22-2015, 01:55 PM   #21
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All that I have seen was 4th gear don't know about 5th.
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Old 05-22-2015, 02:30 PM   #22
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nitrous numbers were good. However, the nitrous is cutting off for a split second between 4000 and 4200 RPM. I have the window switch setup to run nitrous from 3000 to 6500rpm. I'm currently trying to figure that out with nitrous express and jon lund.
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Old 05-22-2015, 02:54 PM   #23
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Low dyno numbers, what could have happened?

Quote:
Originally Posted by ncfive0 View Post
Don't most shops make pulls in 4th gear?


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4th gear dyno pulls are done with the auto trans. It is the closest gear to 1:1 ratio


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Old 05-22-2015, 06:26 PM   #24
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Originally Posted by Droidman86 View Post
It was done in 5th gear

I don't really care that much about the numbers. Main reason I did dyno was to make sure the 150 show was actually putting down what it advertises and that it would be ready for the track.
Mine was dynoed in 4th gear, I got 362 trw on cheap 87octane gas ⛽ the first time and I got 368 trw on 93 octane the second time and I was still disapointed, no mods then. I just had a 3 inch Borla racing exhaust installed so I'll be dynoing it soon to see if any gains.
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