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Computer Carb V6 - V8

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Old 11-30-2005, 11:59 PM
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Car: 1984 Firebird
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Computer Carb V6 - V8

Hey all...

I have a V6 Carbed 2.8 that I'd like to put a V8 into. These past few months, I've been throwing around what I want to do in my head, weither that's a traditional SBC, LT1, or LS1... The thing that has been an issue with me, is that I don't trust a junkyard engine. The second thing, although it won't be a daily driver, I don't know where I'll end up in a few years, so i need it to pass emissions. If I do the carbed V8 route, will all the computer parts, sans the distro and carb work for the V8?

Also, on another totaly unrelated issue... I have an '84 firebird.... I know that year came with TBI for the iron duke... what's the chances of me having a fuel injection gas tank? (with the baffles) If not, if I do go with FI... if I keep the gas lvl above 1/4 of a tank, will it matter if I have the baffle?

Thanks!
Keith
Old 12-01-2005, 08:55 AM
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Car: 82 Berlinetta/57 Bel Air
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Transmission: 4L60E/4L80E
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https://www.thirdgen.org/techbb2/sho...hreadid=229665

The quick answer is, find a donor car. You may be able to use some of your computerized equipment from the V6, but the work involved to convert it most likely wouldn't be worth it, and the things that are different would have to be obtained from a donor car, anyway.

I've never researched the tank baffle question.

Since this is more of an engine swap than a carb question, I'll move it over there.
Old 12-02-2005, 05:56 PM
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Re: Computer Carb V6 - V8

Originally posted by WhiteBlaze

I don't trust a junkyard engine. .......
i need it to pass emissions..........
Keith,
[IMPO] I would never install a J.Yard Engine without sending it for a trip to the machine shop to have it thoroughly checked. If you end up with one in GREAT SHAPE (i.e. Good Bores, Good Crank, Good Rods, Good Heads,) [IMPO] I still wouldn't spend time installing it without a MINIMUMof;
1.) Professional Cleaning and Inspection $120 +/-
2.) Cylinder Hone $40 +/-
3.) Rings $30 +/-
4.) Rod, Crank & Cam Bearings $50 +/-
5.) Freeze Plugs $10 +/-
6.) Timing Gear $40 +/-
7.) Oil Pump $30 +/-
8.) Head/ Valve Job with New Springs Etc. $200 +/-
9.) Obviously new gasket set.... $50 +/-
*.) Original Cost of a J.Yard SBC 150 +/-
Therefore, the J.Yard engine is going to cost you about 600 +/-. I've probably not listed something that someone else will remember for me. After you consider delivery charges, you're about 1/3 of the way to a NEW SBC 350 from one of the big name retailers.

My son and I used J.Yard parts and wiring to complete our conversion to Carb. A donor car would have been welcome but we managed with J.Yard parts. We have installed all the original equipment (other than the air pump). The computer is functional and the car is a fantastic performer. I am confident it will pass a sniffer test. Worse case, we may have to find a smog pump and install it. The previous owner removed it and we really haven't spent too much time worrying about putting it back on....maybe we should. Everything else is in there!

EMISSIONS: KINDA OFF-TOPIC
I don't know how so many people get away without emissions equipment or even why so many people are dead-set on removing it all. Sure the engine compartment looks cleaner and it may be a little easier (in some instances) to troubleshoot but emissions laws are getting stricter and more widespead every year.... [IMPO] Some of those guys with the newer vehicles are in for big headaches in the years to come.

Just my
Kurt
Old 12-02-2005, 06:16 PM
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Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
donor car

emissions, good luck with that part, and im pretty sure they will test your car as a v-6 car, original equipment, so i hope the v-8 wont put much emissions out, or you may have a real hard time

personally if i lived where they tested cars then i would just buy factory v8 one, wouldnt be worth all the work converting to v8 and then risk not being able to pass testing

can buy factory v8 ones all day long for less than it costs to convert to v-8, in most cases, especially where it would need to pass testing,




around here its simple and cheap to convert to v-8, just rip all the 4 or 6 cylinder junk out and get headers and a good old cheap 350 and stick it in and go, simple

but it wouldnt pass any testing,

glad they dont inspect or test here
can do whatever you want, cut cats off, put duals on headers, 454, whatever you wish, no worries, but everything is rusted junk and hard to find now,



good luck

Last edited by Randy82WS7; 12-02-2005 at 06:22 PM.
Old 12-02-2005, 06:34 PM
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A little OFF-TOPIC

Originally posted by Fast68
glad they dont inspect or test here
YET! IMPO - Eventually.......EVERY State's Federal Interstate highway funding dollars will be tied to MANDATED emissions testing requirements. It's only a matter of time....

Last edited by kboehringer; 12-02-2005 at 06:37 PM.
Old 12-02-2005, 09:20 PM
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I fully agree with you there, that's why I want to do the right thing, and do it once. I live in Pa, and as of yet, my county doesn't have emissions testing, but the one next to me does. Like you said, it's only a matter of time.
As for the junkyard engine part... I'm really leaning towards a crate... but I don't know what's my best bet would bewith power and emissions... or best bang for the buck... Maybe an LT1? a bit part of me wants to stay carbed, since that's how the car came.. and for some reason, I have a fear of taking out the tank to install a pump for something fuel injected.
As for passing emissions, I'm almost positive that you have the pass the requirements for that engine, not the car that it was in. Like, for example, if someone put an LS1 in a car, you'd have to pass the requirements for an LS1.
I've been wanting to build up this car for a long time... Actually.. .it was my first car back in the day. I just graduated in May in IT, and have a decent job, so I have the money coming in now. But I just want to make sure I do it right the first time
Old 12-02-2005, 10:15 PM
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Car: 82 Berlinetta/57 Bel Air
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Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Sentimental value is one of the reasons to go ahead and do the swap rather than looking for a V8 car.

It is true it is the engine that defines the emissions requirements. Actually, it's the newer of the engine or chassis, but the engine can't be older than the chassis. So, in effect, it's the year of the engine. And, the engine had to be from a passenger car (no truck engines). Using a crate engine would allow you to clone the equipment required for a carb'd '84.

I wondered why my print-outs always said "82 2.8l", and how much advantage that gave me (they just scanned the VIN). Then I discovered the standards they apply are based on the model year, not the engine type. So, an '82 2.8l has the same standards as an '82 5.0l. However, my system was from an '86 Camaro, and although I included the underhood stickers for it, they still just went by the VIN - good thing, because the '86 requirements are stricter, and I would have failed 2 of the 3 tests I went through.
Old 12-02-2005, 10:56 PM
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1/2 On Topic - 1/2 Off Topic?

Originally posted by five7kid
I discovered the standards they apply are based on the model year, not the engine type. So, an '82 2.8l has the same standards as an '82 5.0l.
Five7Kid,
Not really 100% sure but I think that may be different in GA. I had a long conversation with the guy last year here in Georgia. He also plugged in the VIN and we discussed the "ACCEPTABLE STATE VALUES". He stated that the values allowed for my son's "'82 CFI 305" were some of the highest he'd ever seen. Now I'm not so sure how really knowledgeable that guy was but he seemed sure of himself and he knew a bunch more than I did. Fortunately, here in Georgia I do not believe a VISUAL is required by the laws. Maybe it is any NONE of the technicians actually do it. When they plug the sniffer in our '82's tailpipe it should have no problem passing based on the High Limits of the original Crossfire. ??? Hopefully ???

I am originally from PA and I had MANY good friends around my little area and I could NEVER find a crooked guy to sell me a "SPECIAL" inspection sticker. In PA they check EVERYTHING, Tires, Brakes, Lights (includes AIM), Horns, Belts, Frame Rust, Mufflers, Cats, EVERYTHING. Technicians are actually REQUIRED BY LAW to remove atleast three (3) tires and MEASURE the PADS/SHOES. I don't remember if they offered ANY exemption for ANY year vehicle back to 1974 when the EGR's, Air Pumps, and such BEGAN!!!!!! (I think that's about right '74?)

IMPO If I were still in PA, there is ABSOLUTELY NO CHANCE I'd be playing with inspections by pulling Engines and Removing Emissions Equipment. The State of PA is moving county by county across that state implementing Emissions Testing in addition to their already extremely stringent yearly safety inspections!!

Sincerely,
Kurt

EDIT: I hate spelling mistakes!

Last edited by kboehringer; 12-02-2005 at 11:07 PM.
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