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#1 |
Senior Member
Join Date: Dec 2004
Location: Southern Pines NC
Posts: 3,853
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1986 c-20 auto injected?
Found a c-20 truck but can't find the owner. I was able to give it a quick look but have to get in contact with the property owner before I can really check it out.
My question, is it fuel injected? it's a c-20 small block, so I am guessing 350, it is a turbo 400 but I don't kneel well and had a second before somebody came out to ask me what I was doing, so I couldn't check further. I ran the plate and it came back as a 86. It has been sitting they say for 5 years, left and never picked up. The reason I am asking is because I have a sale on my TBI engine that runs well. I don't want to sell it if this truck is TBI. I could get a friend to do the actual work but he isn't a mechanic and he isn't a mechanic. Thanks, Steve Last edited by qksilver; 02-10-2015 at 11:01 PM. |
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#2 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: 1986 c-20 auto injected?
'86 - no it's not. '87 is the first year. Without opening the hood you know if it has a swap, and then you need the block casting #'s to be sure, or reasonably sure anyways, of what it is.
May have a 305 ... or a 267 !!
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Tim K. 84 K30 srw Silverado 454 auto 85 C20 350 C6P auto flatbed 94 K1500 lifted shortbed 350 4 bbl NV4500 |
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#3 |
Senior Member
Join Date: Dec 2004
Location: Southern Pines NC
Posts: 3,853
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Re: 1986 c-20 auto injected?
if it is stock a c-20 should be a 350 at least, I couldn't remember 86 or 87 first year fuel injected.
thanks, Steve |
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#4 |
Registered User
Join Date: Mar 2010
Location: Underground Bunker
Posts: 284
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Re: 1986 c-20 auto injected?
Should be but you never know what guys do to these things. My 86 c20 came from the factory with a 454 and the lady who sold it to me thought it was a c10 with a 305. I got it home and ran the block numbers and it said 350.
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#5 |
Registered User
Join Date: Apr 2012
Location: Loretto Ky
Posts: 318
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Re: 1986 c-20 auto injected?
Im not sure when in 86 they received the tbi, but my 86 c10 with a 305 came with the tbi. It may have only been an option for the tbi, im not sure.
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#6 |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: 1986 c-20 auto injected?
Was it a late yr build ?
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Tim K. 84 K30 srw Silverado 454 auto 85 C20 350 C6P auto flatbed 94 K1500 lifted shortbed 350 4 bbl NV4500 |
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#7 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: 1986 c-20 auto injected?
Quote:
Before you challenge me on this, please be reminded: a) I was there. I was a development engineer on the '86 trucks and on the launch team for the '87 pickup truck. I remember longing for the day when it would be over, because this new technology was so "complicated". b) As a result of being argued with in the past, and of this "late year build" concept, I contacted at least three of the powertrain engineers who designed the TBI system and did the powertrain calibrations. They also agreed with my recollection - no TBI on C/K trucks until '87 R/V. No "pullahead" of TBI into the '86 model year. So - if your 86 had TBI then it was either (1) transplated from another model year/product line or (2) a GM product release not supported by GM Powertrain engineering. Option 2 is very unlikely. 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/ Last edited by Keith Seymore; 02-11-2015 at 12:25 PM. |
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#8 |
Registered User
Join Date: Apr 2012
Location: Loretto Ky
Posts: 318
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Re: 1986 c-20 auto injected?
I wouldn't have an argument if I wanted. I only owned the truck for a couple years so who knows the history other than word of mouth. All I know is that the tbi harness was integrated into the cab and cluster harness. So whom ever did it done a nice job. Thanks Keith for the info. Always wonder if 86 was a option year or a half year for the tbi.
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#9 | |
Registered User
Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
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Re: 1986 c-20 auto injected?
Quote:
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Tim K. 84 K30 srw Silverado 454 auto 85 C20 350 C6P auto flatbed 94 K1500 lifted shortbed 350 4 bbl NV4500 |
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#10 | |
Senior Member
Join Date: Aug 2004
Location: Everett, WA
Posts: 2,316
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Re: 1986 c-20 auto injected?
Quote:
Way back when, on my first GM truck ('80 GMC Jimmy) I bought in '88, I thought I got bamboozeled because the sticker in the door jamb said something like 09/1979. But what is listed on the sticker is the build date, not the model year. As an example, the '15 model year trucks have probably been for sale since at least September '14, and maybe before that. Built in 2014, but 2015 model years trucks.
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2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold) |
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#11 |
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Join Date: Dec 2007
Location: Kimberley, BC, Canada
Posts: 799
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Re: 1986 c-20 auto injected?
Keith, I don't want (nor can) argue with your expertise. But how about the S10 trucks? I'm pretty sure the 86s in Canada had TBI. I'm just thinking the parts may have existed, but weren't yet applied to the C/K.
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Greg 64 GMC Suburban - 283, NV3500, 14 bolt 77 C10 swb - 292, SM465, 12 bolt |
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#12 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: 1986 c-20 auto injected?
Quote:
My own '87 shortbox (with TBI) was built September 29th of 1986 calendar year. 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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#13 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: 1986 c-20 auto injected?
Quote:
I know M/L vans got TBI in '86 model year, but they wouldn't have had a V8 engine option available (nor would S trucks). 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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#14 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: 1986 c-20 auto injected?
Sorry for the pre-emptive strike.
For some reason I get challenged on this topic a lot. 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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#15 |
Registered User
Join Date: Apr 2012
Location: Loretto Ky
Posts: 318
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Re: 1986 c-20 auto injected?
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#16 |
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Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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Re: 1986 c-20 auto injected?
now i thought that it was 87 only for tbi and then i saw a supposed 86 that i was told was a factory 305 with tbi. can not remember if it was a c10 or 20. now hearing form keith settles it for me. he was there on the team that made them he should be the one to no better then most of us but i know on my 80 monte i had the fuse block had all the spots for the ecm and injectors and the like. messed with me when i saw it as i knew that tbi was not till mid 80's anyway. and 84??? for the gn with the v6. now back to the trucks could that be where some of the bs comes from is people seeing the fuse block with the spots for the ecm and the like??
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car |
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#17 |
Registered User
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
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Re: 1986 c-20 auto injected?
Very well could be, that and cars got stuff like TBI before the trucks did.
Something else, swaps could easily change things up. Picture '81 cab on '87 chassis, poof, '81 had TBI...
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'86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ![]() I'm kinda like duct tape- no real purpose, but handy to have around. |
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#18 |
Senior Member
Join Date: Dec 2004
Location: Southern Pines NC
Posts: 3,853
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Re: 1986 c-20 auto injected?
it is a carbed truck, i bought it.
Thx. Steve |
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#19 |
Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: 1986 c-20 auto injected?
Post some pictures of it when you get time.
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#20 |
Future TOTM Winner
Join Date: Aug 2006
Location: Bulverde, TX
Posts: 2,692
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Re: 1986 c-20 auto injected?
I hate to hijack this thread but the OP has gotten his answer so I don't feel to bad about it. Keith S is obviously an authority on these truck so reading all this makes me doubt my own eyes. I had VERY intimate dealings with an 86 k5 Blazer a few years back. My room mate owed it but I did all the work on it. Lift kit, tune up, etc etc. It was without a doubt a full size k5 Blazer with a 305 tbi engine. Bone stock when my room mate got it. Here's the thing, the title said 1986. To this day I am one of the guys arguing that some 86s had tbi (I always preface the argument with the statement that I am not sure about 350s, but I have seen a 305 with my own eyes.) My room mate sold it to a friend who in turn sold it to another friend. I am currently waiting on pics of the rpo codes and vin so I can do a little more research. This has bothered me for years! The only thing I can think of is the state at some point titled it wrong and it was actually an 87. At this point I am expecting to be proven wrong, I'll report back with my findings soon...
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72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com |
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#21 |
Registered User
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
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Re: 1986 c-20 auto injected?
How do you challenge the guy who was there and built these things? Some people can't stand to be wrong. I'm glad we have you here to help us with these trucks.
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Anthony |
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#22 |
Future TOTM Winner
Join Date: Aug 2006
Location: Bulverde, TX
Posts: 2,692
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Re: 1986 c-20 auto injected?
I'm not challenging him, like I said I expect Keith to be right and me wrong. It just bothers me because I know what I saw, I was around the blazer it for 3 years. A mislabeled title would explain it but I can't stand not knowing what was going on with it.
EDIT: I reread what I originally posted, maybe it came across as challenging but that was not my intentions. I guess I was just relaying a first hand account of WHY some of these rumors go around and I expressed my desire to figure out what was going on with the d@mn thing. Why did it appear to be something that never existed???
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72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com |
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#23 | |
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Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
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Re: 1986 c-20 auto injected?
Quote:
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Anthony |
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#24 | ||
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: 1986 c-20 auto injected?
Quote:
We will be able to tell just with the VIN (the model year code in the VIN for 1987 was "H"). Quote:
Splitting them would have created a ton of additional parts and assembly complexity in terms of fuel lines, ECMs, calibrations, etc, and we were struggling with the launch as it was. 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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#25 |
Registered User
![]() Join Date: Oct 2011
Location: Wildomar, CA
Posts: 466
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Re: 1986 c-20 auto injected?
Well, to really throw a wrench into this, 1985 was first year for 4.3L replacing the 250 inline 6 in the pickups and the Buick 3.8 in the El Camino. El Camino 4.3 was TBI from factory. 4.3 in a pickup was carbureted.... Go figure..
https://www.gmheritagecenter.com/doc...-El-Camino.pdf Last edited by beamn7; 12-01-2015 at 04:54 PM. |
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