Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Emblempros
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons


Reply
 
Thread Tools
Old 10-01-2009, 11:34 AM   #1
Jason 98 TA

 
Drives: Camaro
Join Date: Apr 2009
Location: Texas
Posts: 1,661
PRC CNC Ported LS3 Heads Going on the Engine Dyno Today!!

Guys we're porting the stock LS3 cylinder heads on our engine dyno LS3 today! We'll post dyno graphs asap showing power gains from cnc porting your stock castings.

Anyone wanna take guess at what power will be added with cnc porting the heads & no milling for extra compression?

I'll get info & dyno sheets up later today!
Jason 98 TA is offline   Reply With Quote
Old 10-01-2009, 11:46 AM   #2
Pope Designs
 
Drives: 2013 ZL1 Rally Yellow
Join Date: May 2009
Location: Knightdale, NC
Posts: 347
15HP
Pope Designs is offline   Reply With Quote
Old 10-01-2009, 11:50 AM   #3
ZZcamaro


 
Drives: 2SS w/ ZZ427 Package!!
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,700
I woudl like to see 20HP at the wheels, so that would be 24-25 on an engien dyno. That is what I was told to expect from some very reputable porting companies.

You say you are using the PRC ones? Just tryign to keep track of what is already tested, as I will also be doing some on my car, and could use a different company so that we have multiple ones to compare.

Last edited by ZZcamaro; 10-01-2009 at 12:18 PM.
ZZcamaro is offline   Reply With Quote
Old 10-01-2009, 11:50 AM   #4
Jason@RPM-Motorsports
 
Jason@RPM-Motorsports's Avatar
 
Drives: 98 WS6
Join Date: Jul 2009
Location: NC
Posts: 236
30 HP on the engine dyno

Last edited by Jason@RPM-Motorsports; 10-01-2009 at 04:38 PM.
Jason@RPM-Motorsports is offline   Reply With Quote
Old 10-01-2009, 01:07 PM   #5
2SSRS@Gen5diy

 
2SSRS@Gen5diy's Avatar
 
Drives: To many to list
Join Date: Oct 2008
Location: By the lake in AZ
Posts: 15,143
Have you dynoed the GM CNC L92 heads?
__________________
<img src=images/smilies/thumbdown.gif border=0 alt= title=Thumbdown class=inlineimg />
2SSRS@Gen5diy is offline   Reply With Quote
Old 10-06-2009, 02:16 PM   #6
DGthe3
Moderator.ca
 
DGthe3's Avatar
 
Drives: 05 Grand Am GT
Join Date: Jul 2007
Location: Niagara, Canada
Posts: 24,906
Send a message via MSN to DGthe3
Quote:
Originally Posted by Jason 98 TA View Post
Guys we're porting the stock LS3 cylinder heads on our engine dyno LS3 today! We'll post dyno graphs asap showing power gains from cnc porting your stock castings.

Anyone wanna take guess at what power will be added with cnc porting the heads & no milling for extra compression?

I'll get info & dyno sheets up later today!
Did I miss the results elsewhere on the site?
__________________
Note, if I've gotten any facts wrong in the above, just ignore any points I made with them
__________________
Originally Posted by FbodFather
My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors......
........and HE WOULD KNOW!!!!
__________________

Camaro Fest sub-forum
DGthe3 is offline   Reply With Quote
Old 10-06-2009, 03:47 PM   #7
rex113
 
rex113's Avatar
 
Drives: 2010 2ss silver/cyb
Join Date: Feb 2009
Location: nj
Posts: 200
I think I read somewhere that GM did a very good job with the LS3 heads so if its more than 10 or 15 I would be happily surprised.
rex113 is offline   Reply With Quote
Old 10-06-2009, 03:55 PM   #8
Robin Lawrence
 
Robin Lawrence's Avatar
 
Drives: 2010 Camaro 69 Nova
Join Date: Oct 2008
Location: Galesburg, Illinois
Posts: 447
Quote:
Originally Posted by rex113 View Post
I think I read somewhere that GM did a very good job with the LS3 heads so if its more than 10 or 15 I would be happily surprised.
I agree. We installed the GM Performance Parts heads and there wasn't a huge jump like you would expect.

If you look at the flow numbers in the catalog you see that they pick up 5 to 15 CFM. The big gains are all at the higher lift numbers.

Since it's now October 6th and no dyno numbers I would say that they also didn't see a big jump in the numbers.

The LS3 is a bad boy from GM. The days of huge gains are over.

Robin
__________________
Holley Performance Products

Robin Lawrence is offline   Reply With Quote
Old 10-06-2009, 09:10 PM   #9
Jason@RPM-Motorsports
 
Jason@RPM-Motorsports's Avatar
 
Drives: 98 WS6
Join Date: Jul 2009
Location: NC
Posts: 236
I talked with Jason and it did pick up right at 30 on the engine dyno
Jason@RPM-Motorsports is offline   Reply With Quote
Old 10-06-2009, 09:15 PM   #10
GQ4Life


 
Drives: 2010 Camaro SS LS3
Join Date: Aug 2009
Location: Fishkill, NY
Posts: 5,211
really.. before and after dyno sheet?
__________________
2015 Corvette Z06.. Lime Rock Park 1:01; Watkins Glen 2:14; Thompson Speedway 1:21
GQ4Life is offline   Reply With Quote
Old 10-07-2009, 02:07 AM   #11
Andro
NOICE!!! ™
 
Andro's Avatar
 
Drives: Force Fed 427
Join Date: Jan 2009
Location: GOT BOOST?
Posts: 5,214
__________________
Andro is offline   Reply With Quote
Old 10-07-2009, 10:28 AM   #12
Jason 98 TA

 
Drives: Camaro
Join Date: Apr 2009
Location: Texas
Posts: 1,661
What GM's heads do & what other brands heads do could be something completely different. I don't know what you've seen power gains from the GM cnc heads, but we've had pretty good luck with our port.

Sorry for the delay getting the graphs up guys, this LSx shootout stuff has me working double time on other stuff! It's bad when you have the data & don't even take time to post it for over a week! LOL

Enjoy



Jason 98 TA is offline   Reply With Quote
Old 10-07-2009, 10:29 AM   #13
Jason 98 TA

 
Drives: Camaro
Join Date: Apr 2009
Location: Texas
Posts: 1,661
Not bad for under $750 exchange!!!!

The heads maintain stock valve drop so your not limiting yourself to smaller camshafts to maintain good p/v!
Jason 98 TA is offline   Reply With Quote
Old 10-07-2009, 05:33 PM   #14
pharmd
Master of Medicine
 
pharmd's Avatar
 
Drives: 4th Gen
Join Date: Oct 2008
Location: Kentucky
Posts: 784
How would these do (power gain) on say a TVS + cam motor? I would expect more power, just curious as to how much more...
__________________
2002 Camaro SS. 408 LS2. 500+RWHP/480RWTQ. Full UMI RR suspension. Koni/Strano. 295F/315R. 3500#(55/45)
pharmd is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LS3 Specs revealed: GM's 436hp Sick 6.2L LS3 TAG UR IT Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 28 07-30-2009 06:02 PM
Camaro ls3 news...true or false? Dark Knight Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 74 06-05-2008 05:29 PM
5th Gen Camaro LS3 info from Chevy Hi-Po...READ TAG UR IT Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 295 03-07-2008 10:06 AM
LS3 Specs, and Descriptions Mr. Wyndham Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 5 11-06-2007 01:04 PM
Axial Vector Engine Mr. Wyndham General Automotive + Other Cars Discussion 6 06-20-2007 04:00 PM


All times are GMT -5. The time now is 08:30 AM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.