View Poll Results: What is your idle vacuum!

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  • 18-20 inches

    52 54.74%
  • 15-18 inches

    43 45.26%
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Thread: What is your idle vacuum-stock engine.

  1. #1
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    What is your idle vacuum-stock engine.

    As the title says, having a disagreement with JT. I say 18-20, he says 15-18.
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  2. #2
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: What is your idle vacuum-stock engine.

    Also, this is at 12° ignition timing with a stock cam that is lined up at 0°, everything else stock... stockety stock, stock, STOCK!

    15"-18" FTW!!!!

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  3. #3
    turbo addict
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    Re: What is your idle vacuum-stock engine.

    depends on the motor I guess. The 2.5 5spd I built idles at 20-21" the 2.2 Auto I just finished idles at 17-18 when not in gear, 15" in gear. Both are pretty much as stock as you can get.

  4. #4
    boostaholic
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    Re: What is your idle vacuum-stock engine.

    I vote for you two being gazers.

    I believe it's 15-18.

  5. #5
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: What is your idle vacuum-stock engine.

    My engine will idle at 20", but it is not stock.

  6. #6
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    Re: What is your idle vacuum-stock engine.

    Does this mean stock as in the motor has not been overhauled, or stock as in not many power mods?

  7. #7
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: What is your idle vacuum-stock engine.

    Quote Originally Posted by overlordsshadow View Post
    Does this mean stock as in the motor has not been overhauled, or stock as in not many power mods?
    Power mods are fine, as long as its the stock cam. Most if any won't affect the idle vacuum.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  8. #8
    turbo addict moparzrule's Avatar
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    Re: What is your idle vacuum-stock engine.

    Stock cam, 22'' at 950 RPM idle if the cam timing is straight up. I have the timing a little retarded so right now it's 20-21''.
    Edit- I have my calibration tweeked though for a nice smooth idle though, so not sure if that counts.
    My old daytona also idled at 22'', stock cam also with a TU cal. But both of my cars were 18-20 bone stock.

  9. #9
    turbo addict
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    Re: What is your idle vacuum-stock engine.

    Probably want stock turbo motor #s so won't vote, but last time I used a vacuum gauge on my 3.0 it was reading 28 inches at around 800 rpm. .... come to think of it that might have been with the blocked PCV valve though.

  10. #10
    Supporting Member Turbo Mopar Contributor
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    Re: What is your idle vacuum-stock engine.

    before it blew it was 18-19 inches

  11. #11
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: What is your idle vacuum-stock engine.

    Quote Originally Posted by overlordsshadow View Post
    Does this mean stock as in the motor has not been overhauled, or stock as in not many power mods?
    Stock as in BONE STOCK as far as No parts added and all timing settings at thw stock settings.

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  12. #12
    Hybrid booster
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    Re: What is your idle vacuum-stock engine.

    My idle is around 2000 rpms and I get about 14-15" Thats with the stock gauge though, we all know how accurate THAT is....

  13. #13
    turbo addict moparzrule's Avatar
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    Re: What is your idle vacuum-stock engine.

    Quote Originally Posted by BadAssPerformance View Post
    Stock as in BONE STOCK as far as No parts added and all timing settings at thw stock settings.
    OK well then my 87 daytona and 88 shadow bone stock were 18-20'' at idle. The 87 daytona was a T1 log car, 88 shadow was a T1 blow through.

  14. #14
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    Re: What is your idle vacuum-stock engine.

    my old Daytona had about 17" at idle, almost stock. the scamp with the stock cam seemed to be around 18" in park, about 16" in gear idling hot, still working on getting it back together now. the Daytona had stock gauge and Scamp has autometer, i think i trust the autometer more.

  15. #15
    turbo addict moparzrule's Avatar
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    Re: What is your idle vacuum-stock engine.

    Yeah stock gauge is completely inaccurate.

    A bone stock car with compression up to spec, cam and ignition timing correct, proper idle speed, and a good tune-up will pull 18-20'' of vacuum at an idle in neutral. So I agree with Simon on this one.
    Of course for you auto guys when you put it in gear the idle is suppose to drop to 800 RPM, so seeing 16-18'' is normal at that RPM. But with the proper 950 RPM in neutral, it should be 18-20 for a healthy engine.

  16. #16
    Authorized Vendor Turbo Mopar Vendor mario03SRT's Avatar
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    Re: What is your idle vacuum-stock engine.

    2.5 CB Stock 12 degrees.

    It reads about 16...........but the gage also reads 1 psi when the motor is off. So having said that there are some variances in the gages (stock). I get about 25 on decel.

    My SRT and my ol' GLHS showed 18/19 vacuum.

  17. #17
    turbo addict moparzrule's Avatar
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    Re: What is your idle vacuum-stock engine.

    1 psi is pretty much 2'' of vacuum. So you have more like 18 at idle.

  18. #18
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    Re: What is your idle vacuum-stock engine.

    Stock timing -12*

    orig motor 2.2 non CB- 19" on the STOCK gauge and that's prob not right.

    2nd motor 2.5 .020 over with fresh rebuild- 21" on aftermarket gauge
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  19. #19
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: What is your idle vacuum-stock engine.

    Yep, just idle, NOT in gear,
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  20. #20
    Hot Certified Christians at TD! Turbo Mopar Staff Directconnection's Avatar
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    Re: What is your idle vacuum-stock engine.

    Hard to go by on the stock gauge I have, but it was right around 17"

    This was on a VNT car with stock cam and settings. (actually, two vnt cars showed about 17" and I believe a friends T-II car was right around there as well.)
    Quote Originally Posted by 22mopar
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