12 psi dyno run for 140hp? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-28-2009, 10:08 PM   #21
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Quote:
Originally Posted by gospeed81 View Post
Only about 40% right? Nothing too bad...
I made 173 HP on a Mustang dyno at 13PSI with the shitty greddy down pipe, and band aids.
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Old 04-28-2009, 10:24 PM   #22
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Quote:
Originally Posted by Milton Tucker View Post
I made 173 HP on a Mustang dyno at 13PSI with the shitty greddy down pipe, and band aids.
ok...


Seriously, that's more than I'm making right now I'm sure. I'm only running 9psi though. For the cars I can run dead even with, I estimate I'm pushing 155-160 by comparing power/weight ratios(calculating 12% drivetrain losses for their crank hp).

173hp is actually a good deal more respectable than 140hp with more (EDIT, less) boost.

40% may be an overestimate, but he's missing atleast 50whp there, which is HALF of what he should anticipate as an improvement of N/A power.

There's a big difference between missing 15-20 ponies due to a shitty downpipe and bandaids...and missing half of what you built the setup for due to a crummy tune or whatnot.
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Old 04-28-2009, 11:17 PM   #23
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The point I was making is 140HP on his setup is far from what his potential is.
With a free flowing exhaust and a good tune his car should make another 100HP. There have been several greddy / MS equipped Miata here making 240+HP.
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Old 04-28-2009, 11:23 PM   #24
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Ok, then we were saying EXACTLY the same thing.

40% of 240whp is . . . . 96whp.

140+96=236~240

What he should be making.

I was being sarcastic, sorry for the misunderstanding.

You're right, he is way behind his potential, which I think we've all posted plenty about. Maybe we should get back to helping him figure out where he's ******* up.
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Old 04-28-2009, 11:24 PM   #25
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Quote:
Originally Posted by Milton Tucker View Post
The point I was making is 140HP on his setup is far from what his potential is.
With a free flowing exhaust and a good tune his car should make another 100HP. There have been several greddy / MS equipped Miata here making 240+HP.
+1

See sig
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Old 04-28-2009, 11:33 PM   #26
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Quote:
Originally Posted by gospeed81 View Post
EDIT: Also, don't take offense, but did you actually set the timing (trigger angle) in MS. Yours shows 65, which is a default, or atleast what everyone starts with. I would doubt that you would end up with exactly that trigger angle.
No offense taken, I have not changed that setting, I am still very new to megasquirt, so I need to play with the settings. The car already had the MS in it when I bought it, and the only tweaks I have done were at the dyno (done by the guy at the shop). I am hesitant because I don't want to blow the motor by doing something dumb.

Thanks for the pointers.
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Old 04-28-2009, 11:43 PM   #27
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Quote:
Originally Posted by tripp View Post
No offense taken, I have not changed that setting, I am still very new to megasquirt, so I need to play with the settings. The car already had the MS in it when I bought it, and the only tweaks I have done were at the dyno (done by the guy at the shop). I am hesitant because I don't want to blow the motor by doing something dumb.

Thanks for the pointers.
That is DEFINITELY something that will blow up the motor!

Please pull out the timing gun, or go buy a cheap HF one at least.

Go through Brain's instructions which entail:
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12 psi dyno run for 140hp?-timingset.png  
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Old 04-28-2009, 11:55 PM   #28
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here are the logs from the dyno run, I exported them to excel.

Looks like I am running fatter then I had thought at first (dipping to mid/low 11's for AFR. Unfortunately I do not see boost logged in the dyno runs.
Attached Files
File Type: xls DJDataExport.xls (42.5 KB, 73 views)
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Old 04-29-2009, 12:02 AM   #29
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you didn't log it with your MS?


the AFRs look fine.



zip and attached the drf files while you are at it.
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Old 04-29-2009, 12:46 AM   #30
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I didn't log it with MS, was trying to figure that out and then got tied up in the tables and dyno runs. Next time I tune I will need to set up MS to log first.

Attached are the dyno files (I am assuming drf format)
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File Type: zip RunFile_007.zip (30.6 KB, 30 views)
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Old 04-29-2009, 12:58 AM   #31
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I adjusted the battery voltage correction to 0.1 v and the injector times to 1, I still need to burn these changes to the ECU. (please let me know if it looks correct in the table pictured, seeing that I am going from a factor of 10 to 1 I just want to make sure I am not going to go too lean or anything)

The overboost from what I could see (not hooked up to the ECU) was 195kpa, I bumped it to 215kpa (table pictured)

I will need to get a timing gun (learn to use it, which should not be an issue) and ensure that the timing is done correctly. I might wait for the weekend for that one.

thanks!
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File Type: msq megasquirt200904282350.msq (35.0 KB, 83 views)
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Old 04-29-2009, 01:00 AM   #32
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Now your overboost says -10.7???

Maybe some difference in values in our megasquirt folders is screwing me up. You will KNOW if it cuts in though, and easy to fix.

I would fix timing quickly.

Changing those injector values may require a datalog or two to fix.
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Old 04-29-2009, 01:05 AM   #33
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looks like the tables did not upload that time
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File Type: bmp overboost.bmp (612.6 KB, 151 views)
File Type: bmp Engine Constants.bmp (612.6 KB, 159 views)
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Old 04-29-2009, 09:42 AM   #34
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there's just no way that was 12psi....

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Old 04-29-2009, 10:02 AM   #35
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I need to fix a couple things first (hook up my wideband, fix the cracked hose I have, do something about my spark blowing out), but I will try to do a couple pulls on the street and data log in MS before I change my ECU settings to the ones I posted last night.

But I am seeing the boost guage get in the 12-14 range and the log from the dyno which was hooked to my intake manifold was reading a max boost of 12 psi. I will take a picture of the dyno sheet and post it tonight if that helps on the boost question.
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Old 04-29-2009, 10:20 AM   #36
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i'm having trouble believing that's 12psi too, looks a lot like stock greddy kit
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Old 04-29-2009, 10:23 AM   #37
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Holy FAIL
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Old 04-29-2009, 10:25 AM   #38
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oh okay i see that data....using the stock downpipe, cat and exhaust?

but notice where the boost was when you hit peak RWHP...

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Old 04-29-2009, 11:20 AM   #39
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no cat, stock downpipe, free flow exhaust only a resoniator, no muffler

The boost might be leaking through the hose I need to replace (it is not a main intake line but could be a factor). Also, the air filter is not the largest (it is a HKS hemisphere one), I am looking to move to a larger cone filter.

Any other thoughts?
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Old 04-29-2009, 11:22 AM   #40
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Quote:
Originally Posted by tripp View Post

Any other thoughts?



Yes actually...

Please set your timing (or confirm it's correct) before doing ANYTHING.
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