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i need to replace my fuel pump in my 84. i was reading about someone replacing his pump on a 84 and using an 85 pump on this forum in a older post. the only thing said in the post was the 85 pump and sending unit was better than the 84. whats the advantage of this. has anyone changed out there pump from an 84 to a 85 unit?.would like to know whats the difference is.
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The later pumps push higher volume and pressure. Some say it gives a better throttle response.
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e
Lifetime Member
Send PMLanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
this is only my opinion. if you put in a higher pressure pump, the pressure regulator would regulate where it should be and the computer, injectors,etc control the volume of gas that the engine needs to run at the proper mixture, so i don't see any advantage of it. the only way i could see it benefiting anything was if you were having other mods done that those changes would be needed. again, this is just my opinion.
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THE DYNAMIC DUO
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w
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Send PMNaples, FL - USA
Joined: 6/19/2011
Posts: 46
Vette(s): 1984 C4 Mild mods.85 fuelpump,Accel ignition, TCI, shiftkit, ramAir, Boshplat plugs, duels straight, VP 106 fuel mix, 1990 wheels,, Silver/Gray
1996 LT 4 Stock muffler eliminators Torch Red ZR1 Wheels
I had an 84 for nine years and the first thing I did was put the 85 Fuelpump IT DOES amke a difference. It maintains the pressure Better than the stock one. There is no regulater on the T B s they are sealed. They CAn be regulated if you have the tool to get inside. You need to drill a hole in the bottom. I DID NOT do this there is a website Crossfireinjection .com. Get on it for more upgrades. My 84 was putting out about 250 H P with minor upgrades. Accell ignition,bosh Plat. plugs Exhaust eliminator Forced Air inductio with a K&N filter .Also a A D S chip nolonger available T C I shiftkit Worked for me Go to site it will show you how to do the forced air by cutting a hole in plastic just infront of the Radiator to MATCH the hole in the Hood. G M did that to keep H P down in 84
Wingnut
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e
Lifetime Member
Send PMLanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
good point wingnut. forgot about the TBs on the 84.
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in Forum: C4 HVAC, Fuel, Emissions, and Exhaust
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