How do I tune my 2.8 GM? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

torque monster · 04-11-2002, 09:30 PM

I have a 1984 2.8L or 178ci engine (front wheel drive) that is really lacking power. How can I get more performance out of the stock engine?

raychevy · 04-12-2002, 09:05 PM

What Vehicle is it in ? Those were not powerful engines, so dont expect too much if its a larger vehicle. In my opinion they were not designed to be hot roded and hold up.

monypit · 04-12-2002, 10:47 PM

Edelbrock makes a 2piece manifold system for the 2.8 that you can select a 2bbl top or 4bbl top for. I put one on my 85 s10 blazer and it made a huge difference. I used the 4bbl and put a 400cfm holley 4bbl and it worked great. My motor already had 130000 miles on it but once i did the carb swap i only got another 30000 out of it. could of been age but boy did the secondaries sound good.

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1973 blazer undergoing frame off and Vortec upgrade

torque monster · 04-13-2002, 07:04 PM

Thanks

Hooter · 04-15-2002, 11:13 PM

use your 2.8 as a boat anchor cuz the bottom ends of those motors are terrible
the berrings do not get enough oil and burn out i recomend a 2.5 or a 3.1. Unless u wanna keep on replacing blown up motors

------------------

69 custom camper/cst 10
70 monte carlo
73 chevelle 4 door
deluxe"kermit": no carpet(rubber floor) no floor, no trunk still drives
74 cheyenne super 20 454
77 fully loaded silverado
that my Grandpa gave me
1980 BMW 320i(at least it isnt Japanese)
1984 Buick skyyhwak that i won
1972 Honda ct 90 trailbike

Castlegar B.C.The great white North (Canada Aye!)
Hooter_5@hotmail.com AC/DC RULES!!!
www.castlegar.com

Hooter · 04-15-2002, 11:13 PM

use your 2.8 as a boat anchor cuz the bottom ends of those motors are terrible
the berrings do not get enough oil and burn out i recomend a 2.5 or a 3.1. Unless u wanna keep on replacing blown up motors

------------------

69 custom camper/cst 10
70 monte carlo
73 chevelle 4 door
deluxe"kermit": no carpet(rubber floor) no floor, no trunk still drives
74 cheyenne super 20 454
77 fully loaded silverado
that my Grandpa gave me
1980 BMW 320i(at least it isnt Japanese)
1984 Buick skyyhwak that i won
1972 Honda ct 90 trailbike

Castlegar B.C.The great white North (Canada Aye!)
Hooter_5@hotmail.com AC/DC RULES!!!
www.castlegar.com

monypit · 04-17-2002, 09:54 PM

If you do decide to do a swap Chevy makes a 3.4 crate motor designed specifically for replacing the 2.8 the only thing you have to change from stock is going to an electric fuel pump. It is much more powerfull and better lasting but it is a little pricey after I converted mine I thing I was into it about $3500 or so.

------------------
1973 blazer undergoing frame off and Vortec upgrade

04-11-2002, 09:30 PM	#1
torque monster Registered User Join Date: Apr 2002 Location: Lamont Posts: 2	How do I tune my 2.8 GM? I have a 1984 2.8L or 178ci engine (front wheel drive) that is really lacking power. How can I get more performance out of the stock engine?

04-12-2002, 10:47 PM	#3
monypit Registered User Join Date: Jan 2002 Location: Peoria, AZ Posts: 115	Edelbrock makes a 2piece manifold system for the 2.8 that you can select a 2bbl top or 4bbl top for. I put one on my 85 s10 blazer and it made a huge difference. I used the 4bbl and put a 400cfm holley 4bbl and it worked great. My motor already had 130000 miles on it but once i did the carb swap i only got another 30000 out of it. could of been age but boy did the secondaries sound good. ------------------ 1973 blazer undergoing frame off and Vortec upgrade __________________ 1973/1997 Blazer/Tahoe (it just doesn't know that it is a '73)

04-15-2002, 11:13 PM	#5
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,079	use your 2.8 as a boat anchor cuz the bottom ends of those motors are terrible the berrings do not get enough oil and burn out i recomend a 2.5 or a 3.1. Unless u wanna keep on replacing blown up motors ------------------ 69 custom camper/cst 10 70 monte carlo 73 chevelle 4 door deluxe"kermit": no carpet(rubber floor) no floor, no trunk still drives 74 cheyenne super 20 454 77 fully loaded silverado that my Grandpa gave me 1980 BMW 320i(at least it isnt Japanese) 1984 Buick skyyhwak that i won 1972 Honda ct 90 trailbike Castlegar B.C.The great white North (Canada Aye!) Hooter_5@hotmail.com AC/DC RULES!!! www.castlegar.com __________________ MEMBER DISCS UP FRONT CLUB 69 custom camper/cst 10 70 monte carlo 383 stroker with a 700r4 77 fully loaded silverado (back in the backyard for a little while longer) 1980 BMW 320i (back in the garage finally) 1981 f@*d f150 4x4 (Robert red ford) tried to kill me 1972 Honda ct 90 trailbike Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com AC/DC RULES!!! First generation Monte Carlo club pictures of my life

04-15-2002, 11:13 PM	#6
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,079	use your 2.8 as a boat anchor cuz the bottom ends of those motors are terrible the berrings do not get enough oil and burn out i recomend a 2.5 or a 3.1. Unless u wanna keep on replacing blown up motors ------------------ 69 custom camper/cst 10 70 monte carlo 73 chevelle 4 door deluxe"kermit": no carpet(rubber floor) no floor, no trunk still drives 74 cheyenne super 20 454 77 fully loaded silverado that my Grandpa gave me 1980 BMW 320i(at least it isnt Japanese) 1984 Buick skyyhwak that i won 1972 Honda ct 90 trailbike Castlegar B.C.The great white North (Canada Aye!) Hooter_5@hotmail.com AC/DC RULES!!! www.castlegar.com __________________ MEMBER DISCS UP FRONT CLUB 69 custom camper/cst 10 70 monte carlo 383 stroker with a 700r4 77 fully loaded silverado (back in the backyard for a little while longer) 1980 BMW 320i (back in the garage finally) 1981 f@*d f150 4x4 (Robert red ford) tried to kill me 1972 Honda ct 90 trailbike Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com AC/DC RULES!!! First generation Monte Carlo club pictures of my life

04-17-2002, 09:54 PM	#7
monypit Registered User Join Date: Jan 2002 Location: Peoria, AZ Posts: 115	If you do decide to do a swap Chevy makes a 3.4 crate motor designed specifically for replacing the 2.8 the only thing you have to change from stock is going to an electric fuel pump. It is much more powerfull and better lasting but it is a little pricey after I converted mine I thing I was into it about $3500 or so. ------------------ 1973 blazer undergoing frame off and Vortec upgrade __________________ 1973/1997 Blazer/Tahoe (it just doesn't know that it is a '73)

04-12-2002, 09:05 PM	#2
raychevy Registered User Join Date: Jul 2000 Location: Evansville, Indiana USA Posts: 485	What Vehicle is it in ? Those were not powerful engines, so dont expect too much if its a larger vehicle. In my opinion they were not designed to be hot roded and hold up.

04-13-2002, 07:04 PM	#4
torque monster Registered User Join Date: Apr 2002 Location: Lamont Posts: 2	Thanks



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