What HP would you suspect?
Thread Starter
Melting Slicks
Joined: Sep 2012
Posts: 2,308
Likes: 159
From: LaGrange Park, IL IL
St. Jude Donor '13, '15
What HP would you suspect?
Curious question only as I daily drive this car and not really into racing. But last year I was at a car show and someone asked what kind of power my car was making. I stayed conservative as I'm not much for embellishment. Interested to know what you all think.
2004 coupe automatic with 2.73 gears
Blackwing intake with smooth coupler
XS Power catted LT's and xpipe
GHL axle back
LS6 intake not ported
Had it street tuned, but no dyno
Everything else is stock.
So what do you think at the motor knowing stock it was rated at 350?
2004 coupe automatic with 2.73 gears
Blackwing intake with smooth coupler
XS Power catted LT's and xpipe
GHL axle back
LS6 intake not ported
Had it street tuned, but no dyno
Everything else is stock.
So what do you think at the motor knowing stock it was rated at 350?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Thread Starter
Melting Slicks
Joined: Sep 2012
Posts: 2,308
Likes: 159
From: LaGrange Park, IL IL
St. Jude Donor '13, '15
Melting Slicks
Joined: Jan 2014
Posts: 2,764
Likes: 375
From: Central Florida
estimates are all over, I’ve heard anywhere from 10 to 25%.
My guess would be closer to 15% with auto.
Ps if you swap out rear for a 342 and mild stall it will feel like you supercharged it. I know this first hand, it was my first mod.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 540
From: Kelowna BC
So 380 crank (you stated the stock crank HP, so I stayed with that) would be around 330 real wheel with an auto (or 340 with a stick).
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,985
From: Iowa
St. Jude Donor '03 thru '26
Thread Starter
Melting Slicks
Joined: Sep 2012
Posts: 2,308
Likes: 159
From: LaGrange Park, IL IL
St. Jude Donor '13, '15
And trust me a set of 3.42's is at the top of my wish list. I however do not trust myself to install it, and it ain't cheap to have someone else install.
Melting Slicks
Joined: Jul 2016
Posts: 2,521
Likes: 219
From: Los Angeles CA
Thanks. The average guess for wheel so far in this thread is roughly 343. Add in only 10% and we're at 377 motor. So close to what I thought.
And trust me a set of 3.42's is at the top of my wish list. I however do not trust myself to install it, and it ain't cheap to have someone else install.
And trust me a set of 3.42's is at the top of my wish list. I however do not trust myself to install it, and it ain't cheap to have someone else install.
Thread Starter
Melting Slicks
Joined: Sep 2012
Posts: 2,308
Likes: 159
From: LaGrange Park, IL IL
St. Jude Donor '13, '15
I've done everything else on this car and always do regular maintenance items on family vehicles, including water pumps, full brake jobs, replaced control arms, and wheel hubs. But for some reason the rear diff intimidates the heck out of me. If I had a lift and another person who is more qualified in this area, I'd do it in a heartbeat. Probably still will at some point, I just need to get over the fear of failing.
Melting Slicks
Joined: Jul 2016
Posts: 2,521
Likes: 219
From: Los Angeles CA
I've done everything else on this car and always do regular maintenance items on family vehicles, including water pumps, full brake jobs, replaced control arms, and wheel hubs. But for some reason the rear diff intimidates the heck out of me. If I had a lift and another person who is more qualified in this area, I'd do it in a heartbeat. Probably still will at some point, I just need to get over the fear of failing.
Administrator
Joined: Mar 2001
Posts: 368,602
Likes: 24,859
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
The car came with the LS6 intake so no gain there. The other mods - maybe a combined 35 bhp. Figure a 15-18% drivetrain loss would put you at 316 - 327 rwhp.
Thread Starter
Melting Slicks
Joined: Sep 2012
Posts: 2,308
Likes: 159
From: LaGrange Park, IL IL
St. Jude Donor '13, '15