PRC CNC Ported LS3 Heads Going on the Engine Dyno Today!! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jason 98 TA · 10-01-2009, 12:34 PM

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!

Pope Designs · 10-01-2009, 12:46 PM

15HP

ZZcamaro · 10-01-2009, 12:50 PM

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.

Jason@RPM-Motorsports · 10-01-2009, 12:50 PM

30 HP on the engine dyno

2SSRS@Gen5diy · 10-01-2009, 02:07 PM

Have you dynoed the GM CNC L92 heads?

*DGthe3* · 10-06-2009, 03:16 PM

Quote:

Originally Posted by Jason 98 TA

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?

rex113 · 10-06-2009, 04:47 PM

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.

Robin Lawrence · 10-06-2009, 04:55 PM

Quote:

Originally Posted by rex113

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

Jason@RPM-Motorsports · 10-06-2009, 10:10 PM

I talked with Jason and it did pick up right at 30 on the engine dyno

GQ4Life · 10-06-2009, 10:15 PM

really.. before and after dyno sheet?

Andro · 10-07-2009, 03:07 AM

Jason 98 TA · 10-07-2009, 11:28 AM

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 · 10-07-2009, 11:29 AM

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!

pharmd · 10-07-2009, 06:33 PM

How would these do (power gain) on say a TVS + cam motor? I would expect more power, just curious as to how much more...

10-01-2009, 12:34 PM	#1
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,670	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!

10-01-2009, 12:50 PM	#3
ZZcamaro Drives: 2SS w/ ZZ427 Package!! Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,699	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 01:18 PM.

10-01-2009, 12:50 PM	#4
Jason@RPM-Motorsports 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 05:38 PM.

10-06-2009, 10:15 PM	#10
GQ4Life Drives: 2010 Camaro SS LS3 Join Date: Aug 2009 Location: Fishkill, NY Posts: 5,197 View My Garage	really.. before and after dyno sheet? __________________ 2015 Corvette Z06.. Lime Rock Park 1:01; Watkins Glen 2:14; Thompson Speedway 1:21

10-07-2009, 03:07 AM	#11
Andro NOICE!!! ™ Drives: Force Fed 427 Join Date: Jan 2009 Location: GOT BOOST? Posts: 5,213 View My Garage	__________________

10-01-2009, 12:46 PM	#2
Pope Designs Drives: 2013 ZL1 Rally Yellow Join Date: May 2009 Location: Knightdale, NC Posts: 347	15HP

10-01-2009, 02:07 PM	#5
2SSRS@Gen5diy Drives: 2014 Z/28 #82+#192, 18ZLE 66Nova Join Date: Oct 2008 Location: By the lake in AZ Posts: 15,728 View My Garage	Have you dynoed the GM CNC L92 heads?

10-06-2009, 04:47 PM	#7
rex113 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.

10-06-2009, 10:10 PM	#9
Jason@RPM-Motorsports 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

10-07-2009, 11:28 AM	#12
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,670	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

10-07-2009, 11:29 AM	#13
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,670	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!

10-07-2009, 06:33 PM	#14
pharmd Master of Medicine 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)

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