air pressure gauge???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67cst · 12-17-2002, 02:19 AM

has anyone ever used a tach dash out of a big truck? i might have one lined up, shoulkd i grab it? also it has an air pressure gauge, whats the scoop with those?

Zurbo · 12-17-2002, 02:54 AM

Most of those big trucks had the tach. Pretty much everyone I see around here has the factory tach and they won't turn loose of 'em either. I'd snag it if the price is right and it all works. As far as the air pressure guage, they were for the air ride shocks in the rear.

67cst · 12-17-2002, 03:10 AM

cool thanks, also i guess the tach is calibrated for a v8 right? if i do get this i dont really want the air pressure gauge, can i take it out? but it will still say air pressure on the clear plastic part wont it?

Fred T · 12-17-2002, 03:15 AM

Air pressure gauge in the big trucks was mainly for the air brake system.

67cst · 12-17-2002, 03:37 AM

also is it hard hooking a tach up in a non-tach truck, how many wires are there and where do they all go? does anyone have any diagrams?

70c10 · 12-17-2002, 08:45 AM

Look at the parts in a tach conversion kit. You will need everything except the tach!

Huck · 12-17-2002, 09:46 AM

Just buy it if the price is right---you may be able to trade it for someone who want the air pressure setup for their air ride and you could get the plain jane or maybe the most desireable one of all, the notorious VACUUM tach cluster!!!!Huck

67cst · 12-17-2002, 11:09 AM

thanks guys, anyone have a link for a tach conversion kit?
Derek

71Chev · 12-17-2002, 12:14 PM

Which guage cluster did your truck have? If idiot light dash you will have to convert the wire harness from the idiot type to the guage type. Tachs can be recalibrated, and there are just 2 wires to hook up the tach. 1 to power, 1 to the distributor.

stelth2002 · 12-17-2002, 12:55 PM

Thats what I have in my truck. Air pressure and all cause I didn't take it out. Once I cleaned everything it looked really nice and I couldn't beat the price. However I still have a problem. The tach is for a v8 and I have an inline6. I have disassembleed the tach and anyone who thinks theres a switch for dual operation on all tachs is wrong. I just know the conversions on the speed, but the v8 shows my rpms as quite lower for my 6. I would be willing to trade anyone for a 6cyl tach . Mine works fine, it just is for a V8. Thats true for the air pressure gauge, air brakes.

71Chev · 12-17-2002, 01:02 PM

recalibrate it for the 6. I use a factory 6 tach with my V8.
There is an adjustment screw covered by a white sticker on the back of a factory tach, the calibration screw is behind the sticker.
Mine works perfect.

stelth2002 · 12-17-2002, 02:08 PM

There isn't a screw of any kind on mine???? I have took it apart looking for it. On the back it is stamped "V8 ONLY". I wish I had the correct one though.

67cst · 12-17-2002, 07:57 PM

my truck has the gauges not idiot lights, hmmmm do if i get it i should just leave the air pressure gauge in it? or s there a way to blank it out?

Rod · 12-17-2002, 10:50 PM

You see a sticker in this pic...the round one.... take it off there is an adjustment screw there.

bigvinnie · 12-17-2002, 10:54 PM

here's a pic of the adjustment hole on the back of the tach....

Longhorn Man · 12-18-2002, 12:56 AM

You may have some trouble with the guage panel out of the bigger truck.
It won't fit in your truck. Where the steering column goes it is cut differant.
The tachs in a big truck are sometimes low RPM tachs. The ones we want show 5 grand...some of the big trucks only show 4000.
Just a couple observations.

Hooter · 12-18-2002, 02:16 AM

well then you could be proud to say "I buried my tach!"

Longhorn Man · 12-18-2002, 02:18 AM

LOL! Good point!

67cst · 12-18-2002, 02:20 AM

yeah, this one shows 5 grand, anyone wanna trade me their clear plastic part for a tach for one that is also for a tach but has the air pressure gauge and the gauge itself? wishful thinking i guess

bigvinnie · 12-18-2002, 02:39 AM

I'm interested.... I'm planning to go with rear bags and might try to incorporate a factory air pressure guage into the setup... not sure how (or if) it would work, but I have a tach dash with the regular lens in it if you wanna swap lenses...

haven't actually seen one with air guage before.... does it say "air pressure" or what?

got any pics?

67cst · 12-18-2002, 03:26 AM

ill try and get some pics, might be a while, but yes it says air pressure same style writing like oil pressure, the gauge is mint also. wanna swap? let me know...got pics of yours?

Hooter · 12-18-2002, 03:50 AM

I think it would be cool to find a cluster with a vacum guage. I liked watching the vacum change in my 74 when I would drive under different conditions.

bigvinnie · 12-18-2002, 10:38 PM

here's pic of a tach dash with nothing in the space where the air pressure/vacuum guage would go.... you would have thought something like a clock would have been optional for the half ton trucks, instead of a dead hole....

Hooter · 12-19-2002, 01:43 AM

I dunno why chevy never did that?

67cst · 12-19-2002, 02:13 AM

big V , check your pm box

12-17-2002, 02:19 AM	#1
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	air pressure gauge???? has anyone ever used a tach dash out of a big truck? i might have one lined up, shoulkd i grab it? also it has an air pressure gauge, whats the scoop with those? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2002, 02:54 AM	#2
Zurbo Registered User Join Date: May 2001 Location: Bel Aire, Kansas, USA Posts: 186	Most of those big trucks had the tach. Pretty much everyone I see around here has the factory tach and they won't turn loose of 'em either. I'd snag it if the price is right and it all works. As far as the air pressure guage, they were for the air ride shocks in the rear. __________________ Zurbo's Chevy - 1972 Black/White Cheyenne Super. 402 Big Block /THD 400, factory air and tilt. My other Chevy - 1998 Camaro SS

12-17-2002, 03:10 AM	#3
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	cool thanks, also i guess the tach is calibrated for a v8 right? if i do get this i dont really want the air pressure gauge, can i take it out? but it will still say air pressure on the clear plastic part wont it? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2002, 03:15 AM	#4
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Air pressure gauge in the big trucks was mainly for the air brake system. __________________ Fred There is no such thing as too much cam...just not enough engine.

12-17-2002, 03:37 AM	#5
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	also is it hard hooking a tach up in a non-tach truck, how many wires are there and where do they all go? does anyone have any diagrams? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2002, 08:45 AM	#6
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Look at the parts in a tach conversion kit. You will need everything except the tach! __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

12-17-2002, 09:46 AM	#7
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	Just buy it if the price is right---you may be able to trade it for someone who want the air pressure setup for their air ride and you could get the plain jane or maybe the most desireable one of all, the notorious VACUUM tach cluster!!!!Huck

12-17-2002, 11:09 AM	#8
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	thanks guys, anyone have a link for a tach conversion kit? Derek __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2002, 12:14 PM	#9
71Chev Senior Member Join Date: Dec 2000 Location: Indiana Posts: 3,074	Which guage cluster did your truck have? If idiot light dash you will have to convert the wire harness from the idiot type to the guage type. Tachs can be recalibrated, and there are just 2 wires to hook up the tach. 1 to power, 1 to the distributor. __________________ 71 Chevy CST Long Fleet 350/350/3.07 leaf rear.

12-17-2002, 12:55 PM	#10
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	the BIG truck gauges Thats what I have in my truck. Air pressure and all cause I didn't take it out. Once I cleaned everything it looked really nice and I couldn't beat the price. However I still have a problem. The tach is for a v8 and I have an inline6. I have disassembleed the tach and anyone who thinks theres a switch for dual operation on all tachs is wrong. I just know the conversions on the speed, but the v8 shows my rpms as quite lower for my 6. I would be willing to trade anyone for a 6cyl tach . Mine works fine, it just is for a V8. Thats true for the air pressure gauge, air brakes. __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

12-17-2002, 01:02 PM	#11
71Chev Senior Member Join Date: Dec 2000 Location: Indiana Posts: 3,074	recalibrate it for the 6. I use a factory 6 tach with my V8. There is an adjustment screw covered by a white sticker on the back of a factory tach, the calibration screw is behind the sticker. Mine works perfect. __________________ 71 Chevy CST Long Fleet 350/350/3.07 leaf rear.

12-17-2002, 02:08 PM	#12
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	There isn't a screw of any kind on mine???? I have took it apart looking for it. On the back it is stamped "V8 ONLY". I wish I had the correct one though. __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

12-17-2002, 07:57 PM	#13
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	my truck has the gauges not idiot lights, hmmmm do if i get it i should just leave the air pressure gauge in it? or s there a way to blank it out? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2002, 10:50 PM	#14
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	You see a sticker in this pic...the round one.... take it off there is an adjustment screw there. Attached Images __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

12-17-2002, 10:54 PM	#15
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	here's a pic of the adjustment hole on the back of the tach.... Attached Images __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project



Register or Log In To remove these advertisements.

12-18-2002, 12:56 AM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	You may have some trouble with the guage panel out of the bigger truck. It won't fit in your truck. Where the steering column goes it is cut differant. The tachs in a big truck are sometimes low RPM tachs. The ones we want show 5 grand...some of the big trucks only show 4000. Just a couple observations.

12-18-2002, 02:16 AM	#17
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	well then you could be proud to say "I buried my tach!" __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-18-2002, 02:18 AM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	LOL! Good point!

12-18-2002, 02:20 AM	#19
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	yeah, this one shows 5 grand, anyone wanna trade me their clear plastic part for a tach for one that is also for a tach but has the air pressure gauge and the gauge itself? wishful thinking i guess __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-18-2002, 02:39 AM	#20
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	I'm interested.... I'm planning to go with rear bags and might try to incorporate a factory air pressure guage into the setup... not sure how (or if) it would work, but I have a tach dash with the regular lens in it if you wanna swap lenses... haven't actually seen one with air guage before.... does it say "air pressure" or what? got any pics? __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project Last edited by bigvinnie; 12-18-2002 at 02:41 AM.

12-18-2002, 03:26 AM	#21
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	ill try and get some pics, might be a while, but yes it says air pressure same style writing like oil pressure, the gauge is mint also. wanna swap? let me know...got pics of yours? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-18-2002, 03:50 AM	#22
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	I think it would be cool to find a cluster with a vacum guage. I liked watching the vacum change in my 74 when I would drive under different conditions. __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-18-2002, 10:38 PM	#23
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	here's pic of a tach dash with nothing in the space where the air pressure/vacuum guage would go.... you would have thought something like a clock would have been optional for the half ton trucks, instead of a dead hole.... Attached Images __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project Last edited by bigvinnie; 12-18-2002 at 10:44 PM.

12-19-2002, 01:43 AM	#24
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	I dunno why chevy never did that? __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-19-2002, 02:13 AM	#25
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	big V , check your pm box __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

Register or Log In To remove these advertisements.