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12-27-2011, 09:03 PM
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#1 |
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Registered User
Join Date: Jul 2011
Location: bush louisiana
Posts: 213
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4.3 help
have a 1988 4.3 with carb. am wonderin what i could do to get more horsepower out of her. its not a vortex but am thinkin of gettin one an buildin it. any help
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12-27-2011, 09:21 PM
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#2 |
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Registered User
Join Date: Sep 2008
Location: Creston, BC Canada
Posts: 369
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Re: 4.3 help
Started out the same way but with a TBI model.... most find that with a 4.3 you're going to burn just about as much gas as you do with a 5.7 but spend alot more trying to get the oomph out of it. Some of the things you can look at is going with vortec heads and a crossover intake manifold back to a carb, this will boost your compression some, then tube exhaust headers and the usual sbc 350 upgrades (spark, cam, etc). Most 350 stuff will bolt on (minus those designed for 8 cylinders vice 6). In the end I just decided to go with the 350 built up since if I was gonna pay for the gas, I was going to get the power out of it and I was tired of always wishing I had that "bit more power" when passing on the highway, towing or hills. Just my 2 cents.
Best of luck, Ted.
__________________
'51 Chevy Build - In the design stages Aut viam inveniam aut faciam - I will either find a way or make one. If you don't have time to do it right the first time, when will you... My new build - https://67-72chevytrucks.com/vboard/...70#post8958970 |
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12-27-2011, 09:58 PM
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#3 |
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Registered User
Join Date: Jul 2011
Location: bush louisiana
Posts: 213
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Re: 4.3 help
thats cool an i do understand, it aint gota b a rocket by no means, at one time i even thought about a lope cam in her, but how good would it sound in a v6. ima put the e3 sparkplugs in an take it from there,an yes im like u about the v8 but everybody an there mama has that in there ride. so i just wanted to be diffrent, i also had the tb on it an ran it awhile but got more out the carb, its a dam spunky little motor
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12-28-2011, 09:35 PM
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#4 |
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Registered User
 
Join Date: Jun 2006
Location: Maple Valley, WA
Posts: 1,913
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Re: 4.3 help
If you really want a funky V6 start looking for NASCAR heads and blocks there are a lot of that stuff around now. I've heard a rumbling race V6 and they sound killer. But as far as a non race motor there are cams and etc for them.
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12-28-2011, 10:15 PM
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#5 |
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Registered User
Join Date: Jul 2011
Location: bush louisiana
Posts: 213
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Re: 4.3 help
thanks big dan
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12-29-2011, 11:16 AM
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#6 |
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Registered User
Join Date: Sep 2011
Location: Nevada City, CA
Posts: 908
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Re: 4.3 help
I'll echo what was said about the 4.3 taking as much gas as the 5.7. When you really strain a motor, making it work harder than it was designed to, it burns more gas trying to compensate. A 5.7 would be more comfortable & give you more power with similar mpg. If you want more oomph, this might be a good time to do it.
Otherwise - cam it, upgrade spark & intake, enjoy! |
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