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#26 |
driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,720
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I see it perfect on the passenger side
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-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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#27 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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I've got one on my 3/4 ton, and compared to other similar trucks without them, mine is a whole lot more stable at high speeds on the highway. Other truck's noses lift way up when at high speeds without it...
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#28 |
Registered User
Join Date: Mar 2013
Location: Orillia,ON Canada
Posts: 104
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Re: Front air dam
where would could i get that 4x4 one from online
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Jeremy '86 GMC 1500 dropped 6" in the front and 6" in the rear 2003 Land Rover Discovery Low Life |
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#29 |
Registered User
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Location: central Oregon
Posts: 1,220
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Re: Front air dam
Lmc has them I believe
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88 3+3 454 400 205 410 drw to srw still in pieces 90 3+3 350 400 205 410 srw 84 1/2 ton lb 6.2 4x4 parts truck |
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#30 |
Registered User
Join Date: Jul 2012
Location: United States
Posts: 268
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Re: Front air dam
I'm looking to put an air dam on our 86'. She's suffering from a creeping radiator temp at freeway speeds, going uphill, towing a fully loaded horse trailer.
Can someone tell me how this thing would bolt up? Does it also block off the gap below the front of the radiator to the bumper? Seems if the air dam only bolted to the bumper, that wouldn't do much good as the radiator is behind both the bumper and the air dam. Air hitting the front of the radiator could just flow below it, exiting into the low pressure area behind the air dam instead of being forced through the radiator and then exiting the rear of the radiator into the low pressure area. Anyone have close up photos?
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86' C30 Dually Crew Cab Ranch truck, carb'd 454, TH400, towing a slant load 4 horse trailer. |
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#31 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: Front air dam
Wow! I posted that over NINE years ago! I bought mine from the dealer, but I doubt they carry them any more. I agree that LMC should have them...
Slonaker |
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#32 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Front air dam
Quote:
Air dams that are installed for engine cooling are mounted below the radiator support (to force air up into the radiator). This is the style used on 1980 and earlier. Air dams that are mounted below the front bumper are for aero (and subsequent drag and fuel economy improvements) and do not help engine cooling, as seen on '81 and up. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#33 |
Registered User
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
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Re: Front air dam
I removed mine on my 85 and had cool oing problems... I put it back on and problem was gone. Not saying that they are the whole cooling system but they are a key...
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2004 Silverado Crewcab (Dark Spiral Gray) |
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#34 |
Registered User
Join Date: Dec 2010
Location: baytown, texas
Posts: 310
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Re: Front air dam
I didn't see much difference in mine. Looked cool, but that was it. The one downfall I had was I had a 4.5 drop. Trying to get my jack under the crossmember was impossible. Mines an '85 and it bolts directly to the bottom of the bumper
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#35 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Front air dam
Don't install a 4X4 air dam on a lowered truck!! It will add drag resistance!! I tried it and my truck slowed down!! I even felt the resistance a highway speeds. When down to a 4X2 air and speed increased!! Definately works!! I just hate high curbs and bumps. I scrap it all the time.
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#36 | |
Registered User
Join Date: Sep 2010
Location: Lake Havasu City Arizona
Posts: 863
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Re: Front air dam
Quote:
Posted via Mobile Device
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#37 |
Registered User
Join Date: Mar 2012
Location: Woodbury, Ct.
Posts: 1,680
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Re: Front air dam
I think that LMC sells a shorter one for lowered trucks..I was going to give that one try. I was thinking that it would be difficult to jack up with the full size one.
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#38 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Front air dam
watch the fit
my 89 is not the same as my 88,bumper changed so did the dam dam lol so wouild it help cooling (under rad)or air flow (bumper) to add the 88 one to the 78(cut to fit)
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#39 |
Registered User
Join Date: Apr 2011
Location: Cleveland, Ohio
Posts: 293
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Re: Front air dam
I have one
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1980 C10 SWB Yukon 5.3/5 speed 3.73 gears. |
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#40 |
Registered User
Join Date: Dec 2011
Location: Arlington WA
Posts: 1,728
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Re: Front air dam
i have thought about making one out of conveyor belt so i can smash it all i want
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GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread |
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#41 |
Registered User
Join Date: Jul 2012
Location: United States
Posts: 268
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Re: Front air dam
What was your 85'? 2 or 4WD? What drop was the air dam? (5-1/2"?)
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86' C30 Dually Crew Cab Ranch truck, carb'd 454, TH400, towing a slant load 4 horse trailer. |
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#42 |
Registered User
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
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Re: Front air dam
It was stock heights in front... Only 2 inch shackles in the rear and was the stuck air dam. Didnt make sense at the time... But when I put it back on, the temp went back down. Don't get me wrong, wasn't OVER HEATING, would just heat up farther driving down the road. I was told it was because I had removed the air dam. I put it back on and all was fine
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2004 Silverado Crewcab (Dark Spiral Gray) |
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#43 | |
Registered User
Join Date: Jul 2012
Location: United States
Posts: 268
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Re: Front air dam
Quote:
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86' C30 Dually Crew Cab Ranch truck, carb'd 454, TH400, towing a slant load 4 horse trailer. |
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#44 |
Registered User
Join Date: Mar 2013
Location: Oklahoma
Posts: 122
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Re: Front air dam
I think at 110 you will be getting Gallons Per Mile .... can't imagine the fuel bill, half way on a 20 mile trip to town you would have to switch tanks!
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#45 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Front air dam
I've had mine off. I rebuilt my suspension and noticed no diff at 110 on an empty freeway vs it on. Other than the fact I like the way it looks with it on a lot better on. Granted my truck is lowered a lot from factory height so air doesn't Get under as much anyways. I was thinking of going with the 4x4 front dam and going 1.5 inches lower with a sectioned crossmember. Should put that dam about 2.5 inches off the ground lol
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