All Motor / Naturally Aspirated No power adders

IM pressure at WOT

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Old Jul 1, 2007 | 04:22 AM
  #1  
koczeka's Avatar
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From: Dunakeszi, Hungary
Default IM pressure at WOT

I think my TB is way too small (62mm, 260hp)...
What do U think and what do U log on your car?

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Old Jul 1, 2007 | 10:15 AM
  #2  
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Come on... it is a simple question.
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Old Jul 1, 2007 | 11:43 AM
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From: nothing is real unless it is observed
Default Re: (koczeka)

Pulling more vacuum as rpm rises, it would make sense to open it up and allow it to breath easier. I do not know a definate answer for you, why not try a larger one and let us all know.

That is the one test I have not seen recently, the results of different size throttle bodies on the same engine same day.
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Old Jul 1, 2007 | 12:33 PM
  #4  
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Default Re: IM pressure at WOT (koczeka)

That looks like a serious intake restriction somewhere around TB, intake tube or air filter.
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Old Jul 1, 2007 | 12:35 PM
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Default Re: (koczeka)

With Filter
ATM 1 Throttle % RPM MAP 1 Diff mbar
988 71 4213 981 7
988 100 4664 988 0
988 109 5237 988 0
988 109 5580 984 4
988 109 6313 981 7
988 109 6602 974 14
988 109 6880 970 18
988 109 7075 970 18
988 109 7400 970 18
988 109 7653 970 18
988 109 8012 970 18

W/Out filter
ATM2 MAP2
981 95 4539 974 7
981 109 4664 966 15
981 109 5237 970 11
981 109 5580 962 19
981 109 6313 955 26
981 109 6602 952 29
981 109 6680 954 27
981 109 7075 952 29
981 109 7400 945 36
981 109 7653 945 36
981 109 8012 945 36

Lsvtec
64mm TB
Blox Intake
DC 2.5" 4-1
2.5" exhaust
Ctr Cams, not degreeded
With(ATM2) & W/out (ATM1)stock air box & filter
Logged using Crome Pro


Enjoy
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Old Jul 1, 2007 | 12:59 PM
  #6  
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From: nothing is real unless it is observed
Default Re: (pasaunde)

Sooo.. Is ATM1 with or without filter you have it listed as both
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Old Jul 1, 2007 | 01:06 PM
  #7  
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F -Me
ATM1 is without filter
ATM2 is with filter
Sorry about the Typo
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Old Jul 1, 2007 | 09:23 PM
  #8  
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Default Re: (Natural Aspirations)

I HAVE a 68mm TB on the shelf, just wanted to get some quotes on my opinion... it is also possible my AEM CAI is not ideal for my setup.

Once it is installed I will come back to U with a dyno 62mm vs 68mm and a new graph like I posted.
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Old Jul 2, 2007 | 12:20 AM
  #9  
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Default Re: (koczeka)

just for comparison,

my stock buttom B16, P30 IM, ITR cams, 64mm TB, open intake(no filter) shows 943mbar @4760rpms and 58% throttle position.

datalogging via CromePro and Innovate's Logworks.
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Old Jul 2, 2007 | 12:56 AM
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Default Re: (pasaunde)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pasaunde &raquo;</TD></TR><TR><TD CLASS="quote">F -Me
ATM1 is without filter
ATM2 is with filter
Sorry about the Typo</TD></TR></TABLE>

Try again

From general setups around here, 62mm does sound undersized. Most poeple at least have a 64-65 or so.

.


Modified by Westrock2000 at 4:48 AM 7/7/2007
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