need help on getting HP up!!!
Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
need help on getting HP up!!!
Hey guys I own a 1984 Corvette with the Cross injected small block L83 engine. What simple upgrades can I do to increase the HP up to like the 270s-280s range? I'm only 17 and have a $400 budget but I'm still curious and have been working on this car now for 3 months non stop. I love this car to death and love learning new things so be free and leave any comments.
Last edited by Brxndon; Oct 24, 2015 at 09:00 PM.
Race Director
Joined: Feb 2002
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From: Compound in the Grove, Ga.
2026 Corvette of the Year Finalist - Unmodified
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St. Jude Donor '16
Enjoy it drive it and keep learning, in time you will have the money to get a later car with more HP. Good Luck
Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
Melting Slicks
Joined: Dec 2009
Posts: 2,227
Likes: 284
That's a laugh, best bang for the buck is porting the $hit out of the intake, making the stock fuel pressure regulator adjustable (so you can bump the fuel pressure up), & bumping the ignition timing. BAM! Just as fast as an L98 with out buying new parts.
Here's a picture of an intake cut in half.
Here's a picture of an intake cut in half.
Last edited by ex-x-fire; Oct 27, 2015 at 08:01 PM.
Race Director
Joined: Feb 2002
Posts: 11,596
Likes: 1,053
From: Compound in the Grove, Ga.
2026 Corvette of the Year Finalist - Unmodified
2025 C4 of the Year Winner - Unmodified
2024 C4 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
2019 C4 of Year Finalist (performance mods)
2018 C4 of Year Finalist
2015 C4 of the Year Finalist
St. Jude Donor '16
All Great improvements to the CF, have done them all to my 82, Porting the intake is the best but not something a novice has the tools to do.
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Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
That's a laugh, best bang for the buck is porting the $hit out of the intake, making the stock fuel pressure regulator adjustable (so you can bump the fuel pressure up), & bumping the ignition timing. BAM! Just as fast as an L98 with out buying new parts.
Here's a picture of an intake cut in half.
Here's a picture of an intake cut in half.
Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
Melting Slicks
Joined: Dec 2009
Posts: 2,227
Likes: 284
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
first port the manifoil , timing to 10 - 12 deg , fuel pressure to 12 -13 psi , kn or cool blue filter , 1.6 roller tip , better cat back , headders ,a general tune ! this can make a crossfire run ! not happy then heads , cam , bigger injectors ( paralell plumbing) boring the tb ...... 
read this treat https://www.corvetteforum.com/forums...re-intake.html
read this treat https://www.corvetteforum.com/forums...re-intake.html
Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
first port the manifoil , timing to 10 - 12 deg , fuel pressure to 12 -13 psi , kn or cool blue filter , 1.6 roller tip , better cat back , headders ,a general tune ! this can make a crossfire run ! not happy then heads , cam , bigger injectors ( paralell plumbing) boring the tb ...... read this treat https://www.corvetteforum.com/forums...re-intake.html
read this treat https://www.corvetteforum.com/forums...re-intake.html 
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
That's a laugh, best bang for the buck is porting the $hit out of the intake, making the stock fuel pressure regulator adjustable (so you can bump the fuel pressure up), & bumping the ignition timing. BAM! Just as fast as an L98 with out buying new parts.
Here's a picture of an intake cut in half.
Here's a picture of an intake cut in half.
His number not mine.
I guess I am naïve here... how much hp does his '84 have new... let alone now?
OP just don't expect to port the thing and have a car with 280hp IMO.
I say save more, get a carb, cam, heads, and headers and have over 400hp.
Thread Starter
Intermediate
Joined: Sep 2015
Posts: 27
Likes: 0
From: Amityville New York
He said 280ish hp. That is a serious port job, plus cam and why not port the heads too then? For sure headers etc.
His number not mine.
I guess I am naïve here... how much hp does his '84 have new... let alone now?
OP just don't expect to port the thing and have a car with 280hp IMO.
I say save more, get a carb, cam, heads, and headers and have over 400hp.
His number not mine.
I guess I am naïve here... how much hp does his '84 have new... let alone now?
OP just don't expect to port the thing and have a car with 280hp IMO.
I say save more, get a carb, cam, heads, and headers and have over 400hp.
Melting Slicks
Joined: Dec 2009
Posts: 2,227
Likes: 284
He said 280ish hp. That is a serious port job, plus cam and why not port the heads too then? For sure headers etc.
His number not mine.
I guess I am naïve here... how much hp does his '84 have new... let alone now?
OP just don't expect to port the thing and have a car with 280hp IMO.
I say save more, get a carb, cam, heads, and headers and have over 400hp.
His number not mine.
I guess I am naïve here... how much hp does his '84 have new... let alone now?
OP just don't expect to port the thing and have a car with 280hp IMO.
I say save more, get a carb, cam, heads, and headers and have over 400hp.