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How much vacuum do you make at idle?

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Old 10-31-2009, 09:50 AM
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Default How much vacuum do you make at idle?
Since pretty much all of us have boost gages in the car, I was wondering how much vacuum you guys make at idle and with what cam and displacement? I'll start

370ci 232/232 .595/.595 114 w/ 15# of Vacuum @ 900 RPM
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Old 10-31-2009, 09:52 AM
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293ci 230/236 13" of vaccum @ 900 rpms
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Old 10-31-2009, 10:00 AM
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17-18" 226/222 383 ci
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Old 10-31-2009, 10:50 AM
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depends on the day with me (hot or cold) 364cid stock ls1 cam 14-19#@5-600rpms
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Old 10-31-2009, 11:54 AM
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This is great info. Keep em coming.
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Old 10-31-2009, 12:25 PM
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11" @ 700rpm 239/234 370ci
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Old 10-31-2009, 12:35 PM
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stock 346, 23 at 750
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Old 10-31-2009, 02:25 PM
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Originally Posted by Sluggish
11" @ 700rpm 239/234 370ci
That thing must bump pretty good at 700rpm.
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Old 10-31-2009, 03:49 PM
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11* @ 900rpm 232/240 .595/.608 fully built forged 370ci 8.7:1
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Old 11-01-2009, 01:39 AM
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9.1 370 215/215, 114* 15'' @750~800rpm @7000' elv. 18~20'' at sea level.
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Old 11-01-2009, 02:40 PM
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6", 388 230/242 112 LSA @ 1K rpm @ sea level.
Last edited by SRZ; 11-02-2009 at 11:18 AM.
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Old 11-01-2009, 07:29 PM
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9" 355 236/246 .624/.630 114 also sea level..
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Old 11-01-2009, 07:32 PM
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403, EPP blower cam, 13" @ 900 w/carb
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Old 11-01-2009, 09:00 PM
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16-17 inches at 900 RPM, 383ci 224/240 (620/600) 116+4 CamMotion grind.
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Old 11-03-2009, 03:38 AM
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Motor in sig. 17" at 850-900rpm.
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Old 11-03-2009, 10:25 AM
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Originally Posted by SRZ
6", 388 230/242 112 LSA @ 1K rpm @ sea level.
Wow! I'd like a sound clip of that idle.
Originally Posted by I_Need_Land
9" 355 236/246 .624/.630 114 also sea level..
That's huge grind for an LT isn't it? Don't have much experience with them but I thought that they normally run way less lift.

Originally Posted by Aster
16-17 inches at 900 RPM, 383ci 224/240 (620/600) 116+4 CamMotion grind.
That's an interesting grind. Are those lift numbers reversed or is that cam using that much different lobes from int to exh?
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Old 11-03-2009, 10:36 AM
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Originally Posted by 98Z28CobraKiller
That's an interesting grind. Are those lift numbers reversed or is that cam using that much different lobes from int to exh?
Yeah I said the same thing when I first heard it. The numbers aren't reversed it's just seriously different lobes apparently. I'll get to find out how it does come tuning this weekend
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Old 11-03-2009, 10:47 AM
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232/238 600/605 114lsa PT88mm 370ci 8.8compression 750rpm around 18-16 inches vac.
btw what is this good for i dont realy know of this vac. stuff, talk to me about it. thanks
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Old 11-03-2009, 10:55 AM
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232/240 (EPP FI Cam) - about 17* at 900RPM
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