Stock power upgrade

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Mar 29, 2019 | 04:13 PM

thekozer

Thread Starter

Heel & Toe

Joined: Feb 2007

Posts: 20

Likes: 0

From: Chicago area

Stock power upgrade

Have a '99 convertible. Only mods are Borla exhaust Blackwing cold air intake and dyno tune (315HP). Looking to add around 50 HP. Friends have suggested FAST intake manifold and larger TB. What's my best bang for the buck?

Thanks guys.

Mar 30, 2019 | 10:37 AM

C5 Pete

AMP Racing

Joined: Aug 2006

Posts: 10,755

Likes: 589

From: Washington TWP NJ

2023 C5 of the Year Finalist - Modified

2017 C5 of Year Finalist

St. Jude Donor '09-'10-'11-'12

No sense putting more air in, if you can’t get it out.

Headers/x-pipe. Mild cam. Drive and enjoy.

Mar 30, 2019 | 06:06 PM

thekozer

Thread Starter

Heel & Toe

Joined: Feb 2007

Posts: 20

Likes: 0

From: Chicago area

Thanks. Makes sense.
Pulled out old Dyno sheet, hp actually 330 not 315.

Mar 31, 2019 | 10:47 AM

cv67

Team Owner

Joined: Oct 2004

Posts: 81,241

Likes: 3,063

From: altered state

St. Jude Donor '05

Your tb is fine put a cam headers and a port job on it. Many external bolt ons dont really do much if anything at all.
Unless its a supercharger

Apr 11, 2019 | 10:17 PM

Time for a C-5

Burning Brakes

Joined: Feb 2015

Posts: 987

Likes: 224

From: Motor City, MI

Headers & midpipe are worth 20-25hp. Gotta open her up for more. Auto or manual? A gear will feel like the other 25hp.

Apr 15, 2019 | 02:39 PM

thekozer

Thread Starter

Heel & Toe

Joined: Feb 2007

Posts: 20

Likes: 0

From: Chicago area

Stock power upgrade

Thanks "Time". Much appreciated.

Apr 17, 2019 | 10:29 PM

StingrayRebel

Acct Suspended APR 2026 by request

Joined: Dec 2010

Posts: 10,367

Likes: 1,272

2020 Corvette of the Year Finalist (performance mods)

C5 of Year Winner (performance mods) 2019

fast intake and bigger tb is not worth it in my opinion as your car sits right now, that would only benefit you when you are getting near the upper limits of what the motor can do n/a

Apr 17, 2019 | 11:48 PM

XXXcorvette

Instructor

Joined: Dec 2009

Posts: 106

Likes: 1

From: Armstrong British Columbia

Cam and headers for the win,something near a btr stage 2 should suffice. I feel a huge difference from when my car had just 80mm bbk and ls6 intake from previous owner.

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Apr 18, 2019 | 12:13 AM

Kingtal0n

Safety Car

Joined: Oct 2007

Posts: 4,222

Likes: 1,077

From: South Florida

Best bang for the buck is always technically nitrous.

After you do all the N/A mods throw a small shot and it will be like doing all those mods over again all at once