243 castings to LS6 "Style" Patriot 59cc Stage II?
02-11-2009, 10:38 PM
#1
Teching In
Thread Starter
iTrader: (3)
Join Date: Mar 2007
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
243 castings to LS6 "Style" Patriot 59cc Stage II? How well do these Patriot heads flow compared to the factory 243's my car came with? From what I understand, they are the 6.0 truck heads (lq9?) that have the chambers welded up. I like the idea of the added compression, but am afraid they won't have the same cfm's.
03-01-2009, 11:52 AM
#4
TECH Fanatic
iTrader: (9)
Join Date: Jan 2006
Location: Savannah, GA
Posts: 1,562
Likes: 0
Received 0 Likes
on
0 Posts
what block is it? it came with 6.0 truck heads then the stage 2 is wrong for you. you want the stage 3, allows for bigger intake valve if you have a ls2 block
03-01-2009, 06:16 PM
#5
Have any of you posters actually checked a PRC head on an independent flowbench and dyno, and just measured things vs. a 243? Ask someone who has.
I highly recommend you do that before voicing your opinion.
I highly recommend you do that before voicing your opinion.
poster was OLD SStroker.
03-01-2009, 07:34 PM
#6
Teching In
Thread Starter
iTrader: (3)
Join Date: Mar 2007
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Hmmm. I got the same notification, but don't see it here.
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
03-01-2009, 09:13 PM
#7
Hmmm. I got the same notification, but don't see it here.
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
i had a welded chamber head as well, but stock valve for PTV clearance worries.
mine flowed 299.9 at .650 and 228.x at 650
id imagine with a larger valve you would pick up 5-7 more cfm through the range.
i know the welded chamber heads were not mass produced. but a good alternative too keeping ptv clearance with big cams.
good luck.
Trending Topics
03-01-2009, 09:26 PM
#8
Hmmm. I got the same notification, but don't see it here.
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
Thanks for the replies! These heads are going on an LS2. They are Patriot Performance LS6 "Style" heads, not worked 243 castings. Unfortunately, I'm having a hard time finding solid info on these heads as they aren't being made anymore. Anybody have flow bench numbers for these?
flow should be the same as their cnc 243 head, same port
03-02-2009, 01:17 AM
#10
Teching In
Thread Starter
iTrader: (3)
Join Date: Mar 2007
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Thank you for all the responses! Sounds like they will definitely outflow my untouched 243's and should bump my compression up to around 11.5:1.
https://ls1tech.com/forums/pontiac-g...-228r-cam.html
Originally I was looking to just do a cam swap. I've been looking at different cams for 2 years and finally decided on the 228r. Then I saw how cheap the L92's went for and saw they flowed well. After looking into it, the heads would need to be milled and even with a cometic gasket, I'd still be losing compression. I'd also need a new intake manifold, which would need to be milled to correctly fit the heads. From what I understood, I'd also sacrifice a bit of low end power for a great top end. These heads are going into a relatively heavy car ('06 GTO), so I'd like to retain as much low and mid range as possible. That's why I picked the 228r in the first place: great power under the curve.
The reason I'm even looking at these PP heads is because a friend offered to install and dyno tune them along with a TSP 228r for a great price. Both the heads and cam have approx 4k miles on them, but Patriot just went through the heads. They are straight/flat, have new PRC dual valvesprings, and the bowl areas have been cleaned up.
https://ls1tech.com/forums/pontiac-g...-228r-cam.html
Originally I was looking to just do a cam swap. I've been looking at different cams for 2 years and finally decided on the 228r. Then I saw how cheap the L92's went for and saw they flowed well. After looking into it, the heads would need to be milled and even with a cometic gasket, I'd still be losing compression. I'd also need a new intake manifold, which would need to be milled to correctly fit the heads. From what I understood, I'd also sacrifice a bit of low end power for a great top end. These heads are going into a relatively heavy car ('06 GTO), so I'd like to retain as much low and mid range as possible. That's why I picked the 228r in the first place: great power under the curve.
The reason I'm even looking at these PP heads is because a friend offered to install and dyno tune them along with a TSP 228r for a great price. Both the heads and cam have approx 4k miles on them, but Patriot just went through the heads. They are straight/flat, have new PRC dual valvesprings, and the bowl areas have been cleaned up.
03-04-2009, 07:33 PM
#11
PM if you can Jon. I just wanna know for me personally not to share it with the whole internet
Anybody else out there have any independant flow data on either PP or PRC heads? PM me......
03-05-2009, 05:09 AM
#15
TECH Regular
Join Date: Nov 2005
Location: Arlington, TN
Posts: 459
Likes: 0
Received 0 Likes
on
0 Posts
Patriot Stage 2 Ported LS6 Heads + 222/228 Lunati Voodoo cam + SSW LT's (with fual dual 3" cat back) = 410rwhp (sae adjusted).
With a slightly larger cam you should be able to make a little more.
Look into porting the LS2 manifold for another couple of ponies...
This is for that GTO correct?
With a slightly larger cam you should be able to make a little more.
Look into porting the LS2 manifold for another couple of ponies...
This is for that GTO correct?
03-14-2009, 10:38 AM
#17
TECH Regular
Join Date: Mar 2006
Location: Rolesville, NC
Posts: 471
Likes: 0
Received 0 Likes
on
0 Posts
05-28-2009, 12:03 AM
#18
Teching In
Thread Starter
iTrader: (3)
Join Date: Mar 2007
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
454rwhp, 420rwtq Well, I've got the car back and have to say I'm pretty happy with the results. Car still needs a little drivability tuning, though.
Car also has an unported Fast 92, Full exhaust, 4" intake, 42# injectors, ASP pulley, and LS7 clutch with aluminum flywheel.
Car also has an unported Fast 92, Full exhaust, 4" intake, 42# injectors, ASP pulley, and LS7 clutch with aluminum flywheel.
05-28-2009, 12:12 AM
#19
Patriot Stage 2 Ported LS6 Heads + 222/228 Lunati Voodoo cam + SSW LT's (with fual dual 3" cat back) = 410rwhp (sae adjusted).
With a slightly larger cam you should be able to make a little more.
Look into porting the LS2 manifold for another couple of ponies...
This is for that GTO correct?
With a slightly larger cam you should be able to make a little more.
Look into porting the LS2 manifold for another couple of ponies...
This is for that GTO correct?
