Entry level mods for 84 Crossfire
Thread Starter
Advanced
Joined: Apr 2018
Posts: 57
Likes: 3
From: Hilton Head South Carolina
Entry level mods for 84 Crossfire
Ive frequented the forum now for about 4 years. I just recently bought an 84 vette (first one) because I believe that a high horsepower crossfire vette would be a really interesting showpiece at my local car meets 
For you TBI enthusiasts I am wondering what you did early on to boost those horsepower numbers and what you recommend to do first. I appreciate any advice you can give me!
For you TBI enthusiasts I am wondering what you did early on to boost those horsepower numbers and what you recommend to do first. I appreciate any advice you can give me!
Race Director
Joined: Feb 2002
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From: Compound in the Grove, Ga.
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St. Jude Donor '16
Welcome to the Forum. Hope you find all your answers here lots of very great C4 owners here very willing to help. Here you go had 3 84's great Corvette's.
The 82 had the same L83 so this applies and is a great read for you. Lots of easy mods.
https://www.corvetteforum.com/forums...solutions.html
The 82 had the same L83 so this applies and is a great read for you. Lots of easy mods.
https://www.corvetteforum.com/forums...solutions.html
Last edited by FASTAZU; Apr 20, 2018 at 09:49 AM.
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
Tried and true: Port intake (or the more expensive slap on a renegade) bump up base timing and set the fuel pressure. You'll feel the difference. After that it's just how much do you want to spend.
The above link is a good read.
The above link is a good read.
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
start by porting the manifoil or go the easy way and get a renegarde . newer type fuel pump ,1,6 roller tip , a lot of timing , cat back , nead more !!!! long tubes ,cam , heads ,new ecm ++++
Last edited by corvettenorway; Apr 21, 2018 at 11:09 AM.
Pro
Joined: Jan 2003
Posts: 706
Likes: 47
From: Denver Colorado
The fuel pressure is a big deal, the L83 likes 13 psi and the stock '84 pump is maxed out at that point so an upgrade to a later '85 on pump may be required to get that pressure. Check it while driving, not just at idle.
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
https://www.summitracing.com/parts/e...SABEgLbEvD_BwE
Jump right to this, they have a polished version too. For th emoney hard to beat will still flow better than a ported stocker. There isnt a lot of meat to work with on the GM piece.
Long tube headers, an upgraded head (afr 180) or tfs 175?? head, go conservative on the cam it will haul butt.
Look up Buccaneer he designed it and knows how to the most out of it without wasting money.
Jump right to this, they have a polished version too. For th emoney hard to beat will still flow better than a ported stocker. There isnt a lot of meat to work with on the GM piece.
Long tube headers, an upgraded head (afr 180) or tfs 175?? head, go conservative on the cam it will haul butt.
Look up Buccaneer he designed it and knows how to the most out of it without wasting money.
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