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September 22nd, 2002, 09:40 PM
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vacuum/boost gauge or boost gauge?
is there any benefit to having a vacuum/boost gauge over just a 30psi boost gauge?the vacuum is from 30psi to 25 psi boost,have a choice of either one,which one gives the best info?is vacuum something to watch?
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1986 Grand National...who's yer Daddy?     
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September 22nd, 2002, 09:54 PM
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I have always had a Vac/Boost gauge. The Vac. reading is a good way to make sure your car is running consistant, and that you have no leaks in the intake.
Auto Meter makes a nice 30-0-30 Unit that provides great readings. The gauge requires no extra hookup other then running the boost line. IMO: Get the vac/boost gauge.
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Herb Fishman TurboRegal84@Hotmail.com 1987 Buick GN X - One of the Fortunate 547 2008 TrailBlazer SS w/ 3SS 1987 Buick Grand National 840 Miles-SOLD 2003 Ford SVT Lightning #4261-SOLD 1999 Ford SVT Lightning #2212-SOLD 1984 Grand National TOTALLED By a Church Van Special Thanks to: Kevin "BFH" Williams, Chuck P, and Jason Cramer. "Was one of the few stock appearing 12 sec Hot-Air GN's" TurboBuick.com Member Since 5/99
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September 22nd, 2002, 10:31 PM
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I second Herb. Get the vacuum/boost gauge and never look back. It's also good to know when you are getting close to the boost sometimes too, not just when you're into it already.
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Tom Brown GSCA #4647 ========================= 1987 GN 12.05 @ 109 mph - 1.64 short time Mods: PTE-51, MSD 50's, Walbro 340 hotwired, CAS V4, TH 3" DP with dump, Joe Lubrant street chip, RJC power plate, LT1 MAF Sensor with Translator Plus, 9" K & N Filter under the front bumper, SMC Alcohol injection kit, stock block, stock intake plenum, stock throttle body, stock cam, stock headers, 2 1/2" exhaust with Dynomax Ultra Flows, rebuilt transmission, 3200 stall lockup from CK Performance, Moser axles ========================= 2008 Trailblazer SS (AWD) - Imperial Blue 14.15 @ 98 MPH Mods: IEATSRT8 cold air kit, rear muffler delete, PCMForless tune, PCMForless trans cooler, Dashhawk for viewing the vitals
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September 23rd, 2002, 01:36 AM
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Just put a new Autometer 4303 Ultralight in salvageV6 today.
 30-0-30 gauge. Very nice. Within 1 pound accuracy across the board with my calibrated very expensive gauge. Replaced my VDO one that was 1.5lbs. off and non-linear in response. Putting that one on the GN to see vacuum it only has a boost gauge now. Vacuum is good to have for tuning.
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September 23rd, 2002, 05:24 AM
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My car originally had a 2-1/16" vac/boost gauge, but found it could be a little hard to read when things started getting a little hectic in the car. I ended up replacing it with a 2-5/8" boost gauge instead. I'm going to put a vac gauge under the radio along with a tranny temp gauge.
Peter
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