427RR Na 604RWHP
Thread Starter
Burning Brakes
Joined: Jul 2004
Posts: 855
Likes: 11
427RR Na 604RWHP
We just finished up a customers 427 for road racing. The final numbers are 604RWHP and 566RWTQ. The engine is a 4.125 MDS block, 4" stroke, Cartek Stage 5 ZO6 heads with the latest revisions (about 20CFM average increase), Kook's 1 7/8", off road pipes, GHL Cat back, Cartek clutch, Steel flywheel, and Stage 5 hydraulic cam.
Last edited by Dave_Busch; Jan 18, 2005 at 11:28 PM.
Le Mans Master
Joined: Dec 2000
Posts: 6,311
Likes: 399
From: North Haven, CT
Congrats Dave, those are absolutely amazing numbers. Especially for a road racing car, which probably wouldn't be tuned for peak power like a mainly drag raced car. I think that car is actually making more power than the factory C5Rs put out with their restrictor plates. 
What intake/tb are you running on this car?
What intake/tb are you running on this car?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Le Mans Master
Joined: Jun 2004
Posts: 6,752
Likes: 3
From: Bethlehem PA
Dave, Julio and the rest of da boyz... that's a KILLER set-up!
Congrats on building the new NA Beast
Only thing that's tough about these posts is I've been saving for my new heads and clutch for a couple months and when I pull into Cartek to get 'em done...... I'll be daydreaming about having that 427 dropped in instead.
As always though, I'm never dissapointed when I leave Garwood for the "test ride" home.
Scott
Congrats on building the new NA Beast
Only thing that's tough about these posts is I've been saving for my new heads and clutch for a couple months and when I pull into Cartek to get 'em done...... I'll be daydreaming about having that 427 dropped in instead.
As always though, I'm never dissapointed when I leave Garwood for the "test ride" home.
Scott
Thread Starter
Burning Brakes
Joined: Jul 2004
Posts: 855
Likes: 11
Originally Posted by BillY2KFRC
Congrats Dave, those are absolutely amazing numbers. Especially for a road racing car, which probably wouldn't be tuned for peak power like a mainly drag raced car. I think that car is actually making more power than the factory C5Rs put out with their restrictor plates.
What intake/tb are you running on this car?
What intake/tb are you running on this car?
Safety Car
Joined: Apr 2004
Posts: 4,097
Likes: 10
From: East Coast
That's the highest HP I've seen for an LS-6 head C5 . Not bad for a little 427 , can't wait to see the numbers for the "big" motor your building 
. Great work guys . And that was with 3.90 gears too , maybe you should dyno it with 3.42's .Let's throw some slicks on it and take it down the 1320 .
. Great work guys . And that was with 3.90 gears too , maybe you should dyno it with 3.42's .Let's throw some slicks on it and take it down the 1320 .
Last edited by STEALTH 99 C5; Jan 20, 2005 at 02:53 PM.
Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 8
From: Buy USA products! Check the label! Employ Americans
Both numbers are nice and big. Hope I get a chance to run with it in the spring. May be I have in the past. I need one too. Again congradulations to you and the owner 
Thread Starter
Burning Brakes
Joined: Jul 2004
Posts: 855
Likes: 11
Originally Posted by simpleman68
Dave, Julio and the rest of da boyz... that's a KILLER set-up!
Congrats on building the new NA Beast
Only thing that's tough about these posts is I've been saving for my new heads and clutch for a couple months and when I pull into Cartek to get 'em done...... I'll be daydreaming about having that 427 dropped in instead.
As always though, I'm never dissapointed when I leave Garwood for the "test ride" home.
Scott
Congrats on building the new NA Beast
Only thing that's tough about these posts is I've been saving for my new heads and clutch for a couple months and when I pull into Cartek to get 'em done...... I'll be daydreaming about having that 427 dropped in instead.
As always though, I'm never dissapointed when I leave Garwood for the "test ride" home.
Scott
Team Owner
Joined: Apr 2001
Posts: 26,794
Likes: 613
From: Elmhurst, IL (West Suburb of Chicago) & Home of MEGA Horsepower
St. Jude Donor '06
Outstanding job Dave, Julio and CARTECH! You guys always are raising the bar and kicking serious as s in the LS1/6 Performance WORLD!! Keep up the GREAT WORK!!!!!!!!!!!!
