huttler

iTrader: (1)

Will upgrading from Stage II 241's, to LS2/LS6 Patriot heads, produce worthwhile power gains? My current 241's are: intake runner 220cc, 2.01/1.57, 63cc.

With these heads and the mods below, I'm making 412rwhp
-LS6 intake
224/228, .581/.588, 114 LSA, XE-R
Long tubes, x-pipe
haltech CAI

02*C5

iTrader: (1)

Whats your intake and exhaust numbers you want to match the 200 to 500 lift numbers. Those are the critical numbers that set a good head apart from a mediocre head. Once you get to 600 lift if your talking a difference of 5 to 10 flow points then it is not worth it if there is a difference of 20+ points, and your not out flowing your cam, that makes a great deal of difference but you will also see that difference in the lift numbers early on. Also your set up and tune play a large part.

Also are you going to run the full 63/64cc bowls (low compression) for future forced induction or are you going to change to a high compression N/A build and run the 59cc bowl. Are you going to stick with that cam or...for about a year...or are you going to a bigger cam. Whats your future application going to be track only, street/strip/ weekend warrior/ street terror. What numbers are you going for?

There is a lot that goes into choosing a head. Every thread you go into people give advice on what they know and they are running, again it does not mean that their set up is going to be best for you.

So give some more info and maybe you can get a better answer.

ineedamotor

i would tend to think they would be worth it.. but thats just my opnion.

LilJayV10

iTrader: (39)

Who ported the stage 2 241's? If it was someone like TEA then no I wouldn't think the change would be worth it.

JPH

iTrader: (2)

Junk them both, and but a real head imo. AFR, Trickflow, etc...

02*C5

iTrader: (1)

Have you seen what TEA can do with some of those 241's and 243's for the money they can't be beat.

huttler

iTrader: (1)

Unfortunately, I've had these heads for over 5 years, and lost the numbers. I know they were ported by Felber, and he called them "Big Uglies". I purchased them through RevXtreme in Tampa FL. There isn't much information about them anywhere, that I can find. I guess Felber only sold these head for 6-12 months. I tried contacting Felber, no luck, RevXtreme, no luck (under new ownership), endless internet and forum searches - very little. Anyway, enough of that. How do I find someone that can perform a bench flow for me?

I don't plan on FI, or changing my cam.

I'm debating between 64cc with .041 gaskets - 8.34 DCR, or 59cc with .055 gaskets - 8.58 DCR. I'm concerned about 8.58 DCR, because I only have 91 octane where I live, and the info I've run across, suggests max 8.5 DCR for 91, and 8.7 for 93.

My goal is to gain at least 20rwhp. Tony Mamo suggested that I could gain about 30-40rwhp with AFR 205's and a FAST 92. I would spend about $2,500 more if I went that route. I'm not completely ruling out that idea, if the Patriots will only gain ~10rwhp.

Overall, from everything I've read, I get the idea that no matter how much porting and mods the LS1 heads get, they're vastly inferior to the LS2/LS6 heads. So for $1,295, it sounds like a lucrative deal, but I simply don't have enough experience to know if it's worth it.

LOL, I always think of my car (or my driving) as a street terror. It will be a street car, and occasionally a daily driver.

SOMbitch

iTrader: (8)

243's with the right porting can be SICK. It depends on the port job on your current heads VS. how good the 243 job is. Get yours flowed and then look at some good 243's although #'s don't tell the whole story.

243's in general should be worth 15+ to a similarly prepared 241 head.

huttler

iTrader: (1)

Thanks for the info. Who are 3 of the best 243 porters.

How/where do I find a shop to flow test my heads?

02*C5

iTrader: (1)

Now I went with Lloyd Port Works because the guy is a genius when it comes to working the 241's. Mine are the stage 2's, and he is very well respected. My stage 2's compare with TEA's 243's stage 1.

Here are my flow numbers;
.200
144
109

.300
204
142

.400
243
177

.500
284
205

.600
305
219
If you send him the heads and you only want the P&P done its 1200 for these and 1300 for his stage 3. I have 59cc bowls and am at 11.5:1 with a Cometic .055. I can only get 91 octane. The top 3 243 head workers I would say

TEA (unbeatable numbers for the price)
Lloyd Elliot (around since dirt)
Texas Speed (good work no complaints)

Thule

I got the patriot stageII ls6's 59cc,ferra valves. Hs roller rocker's, extreme valves,

What i can say, they are realy well made,

I have no numbers, but there was a huge diffirent after install.

outkast6991

iTrader: (34)

if your gonna name the top 3 ls head porters in the country that list wouldn't be it (TEA would be the best choice of those 3, they do nice work from what i've heard). not saying they aren't ok but definitly not the best. my advice would be do ALOT of research on other boards so you don't get screwed

ps: Greg Good should be on the list

SLOC5LS6

Actually, the best LS6 and LS1 head porters would be Cartek. They're spitting out LS6 and LS1 heads that's outflowing TFS and AFR heads.

outkast6991

iTrader: (34)

i'd say cartek is on the list, not the top, but on it none the less

outkast6991

iTrader: (34)

ps: they also cost more than tfs or afr too. you do get what you pay for though

02*C5

iTrader: (1)

I know there is way more out there and yes Greg Good is in the same category as Lloyd Elliot but I usually only comment on what I have personally used (2Corvette/4Mustangs) or have close experience with.