How much power gain from stock 243ss to PRC 243's?
10-14-2009, 12:09 PM
#1
TECH Enthusiast
Thread Starter
iTrader: (12)
Join Date: Nov 2008
Location: Long Island, NY
Posts: 590
Likes: 0
Received 0 Likes
on
0 Posts
How much power gain from stock 243ss to PRC 243's? I have some stock brand new 243 cylinder heads I was planning on installing soon but I'm now considering either trying to port the heads myself, still searching about this topic, or sell them and get the PRC stage 1 cylinder heads with my 1218 springs. How much of a gain in power, change in gas milage and drivability at low rpm would there be?
The stock 243's are rated about 260cfm@ .500 lift and the PRC heads are rated at 293cfm @ .500 lift. I was guessing 30rwhp gain with the stockers and 45rwhp+ with the PRC heads.
Also if anybody would be interested in the stock 243's, they are excellent condition and brand new LS6 heads but unsure if they are actually the sodium exhaust valves. Assembled with .550 lift LS6 springs. Asking $625 pick-up only unless willing to pay shipping.
The stock 243's are rated about 260cfm@ .500 lift and the PRC heads are rated at 293cfm @ .500 lift. I was guessing 30rwhp gain with the stockers and 45rwhp+ with the PRC heads.
Also if anybody would be interested in the stock 243's, they are excellent condition and brand new LS6 heads but unsure if they are actually the sodium exhaust valves. Assembled with .550 lift LS6 springs. Asking $625 pick-up only unless willing to pay shipping.
Last edited by camz28arro; 10-14-2009 at 03:56 PM.
10-14-2009, 01:20 PM
#3
Typically gains swapping to a stock LS6 head over your SL1 head will be about 10-15rwhp. We have seen an average of 25-30rwhp gains by porting the LS6's from their stock form.
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
__________________
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
10-14-2009, 02:41 PM
#5
Typically gains swapping to a stock LS6 head over your SL1 head will be about 10-15rwhp. We have seen an average of 25-30rwhp gains by porting the LS6's from their stock form.
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
10-14-2009, 04:00 PM
#6
TECH Enthusiast
Thread Starter
iTrader: (12)
Join Date: Nov 2008
Location: Long Island, NY
Posts: 590
Likes: 0
Received 0 Likes
on
0 Posts
The Patriot stg 1.0 heads are about $1075 shipped assembled and shipping my heads there and back to texas plus the work would make me into the heads around $1400. Thats why I want to sell them and buy new ones.
I guess my 241 to 243 ported heads estimate of 45rwhp is correct for my setup?
10-14-2009, 04:44 PM
#7
On The Tree
iTrader: (8)
Join Date: May 2009
Location: albany ga
Posts: 189
Likes: 0
Received 0 Likes
on
0 Posts
Typically gains swapping to a stock LS6 head over your SL1 head will be about 10-15rwhp. We have seen an average of 25-30rwhp gains by porting the LS6's from their stock form.
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
Let us know if we can help. Since you've already got the LS6 castings, we could just port those and save you a few bucks too!
Whats the average cost for you to port a set of 243's if i already have new springs and valves just you do the p&p work thanks
Trending Topics
11-09-2009, 11:35 AM
#9
For CNC work and valve job it is $650. Sorry I missed your reply when you posted this!
__________________
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
