porting stock 241 heads ?'s
10-25-2006, 08:17 AM
#1
porting stock 241 heads ?'s ok, so I'm VERY new to this area of technical information. Here is what I"m wanting to do.
I have found a place that sells used stock LS1 heads. They told me they would be $175+shipping. So I figured I would pick up a set so I have no down time on my daily driver. I have talked with a VERY knowledgable guy on my local board about my furue plan & set-up I wanna run. Come to find out, his was almost identical.
I'm plannin on a cam swap next year. I wanna go with a 224/224 .581/.581 112. I will also be spraying a 100 shot. I already figure on probably having to go with ARP rod bolts.
Now to the heads part, I figured I could pick up a set & get them port/polished w/new valves cheaper than $1200 for a new set of aftermarket ones. And after talking with the local guy, this is the route I have decided on.
He told me his valves were as follows in his set-up, which was originally basically the same as my plans.
2.02" - intake
1.57" - exhaust
Now I know very little about valves, porting, or any of this technical stuff involved with getting this done correctly without getting screwed. Here are the few questions I need to ask from those who port heads, have ported heads or are just VERY knowledgable in this field.
Remember, this is a daily driver, not a track only car.
1) What brand of valves would you suggest to use in this application??
2) What combustion chamber size should I shoot for with this size cam??
3) If goin with a LS6 intake, should the heads & intake be port matched??
4) Can you request a minmium flow # when getting the heads ported??
Sorry if some of this is considered dumb question by people, but I'm trying to learn. I never plan on going with a larger cam or switching heads. The most extreme thign that could happen is getting forged pistons & better rods way later down the road. Even then my nitrous shot would not exceed a 150 hit.
I'm not looking for super monster power. I'm just trying to build something that I will personally be happy with & can drive to work everyday without any issues.
Thankx in advance to anyone who can help me learn about this stuff & help to point me in the right direction.
I have found a place that sells used stock LS1 heads. They told me they would be $175+shipping. So I figured I would pick up a set so I have no down time on my daily driver. I have talked with a VERY knowledgable guy on my local board about my furue plan & set-up I wanna run. Come to find out, his was almost identical.
I'm plannin on a cam swap next year. I wanna go with a 224/224 .581/.581 112. I will also be spraying a 100 shot. I already figure on probably having to go with ARP rod bolts.
Now to the heads part, I figured I could pick up a set & get them port/polished w/new valves cheaper than $1200 for a new set of aftermarket ones. And after talking with the local guy, this is the route I have decided on.
He told me his valves were as follows in his set-up, which was originally basically the same as my plans.
2.02" - intake
1.57" - exhaust
Now I know very little about valves, porting, or any of this technical stuff involved with getting this done correctly without getting screwed. Here are the few questions I need to ask from those who port heads, have ported heads or are just VERY knowledgable in this field.
Remember, this is a daily driver, not a track only car.
1) What brand of valves would you suggest to use in this application??
2) What combustion chamber size should I shoot for with this size cam??
3) If goin with a LS6 intake, should the heads & intake be port matched??
4) Can you request a minmium flow # when getting the heads ported??
Sorry if some of this is considered dumb question by people, but I'm trying to learn. I never plan on going with a larger cam or switching heads. The most extreme thign that could happen is getting forged pistons & better rods way later down the road. Even then my nitrous shot would not exceed a 150 hit.
I'm not looking for super monster power. I'm just trying to build something that I will personally be happy with & can drive to work everyday without any issues.
Thankx in advance to anyone who can help me learn about this stuff & help to point me in the right direction.
10-25-2006, 09:05 AM
#2
TECH Enthusiast
iTrader: (12)
Join Date: Sep 2004
Location: Danville, VA
Posts: 684
Likes: 0
Received 0 Likes
on
0 Posts
there are a bunch of threads about heads on this board, with that said...
your best bet is probably to buy a set of CNCed LS6 heads, you can get them for $1000 shipped from some of our sponsers. they would increase your compression to about 10.5:1 and would flow better than ported 241s.
getting CNCed 243 (LS6/LS2) heads will give you better results without spending as much money. i've looked into having a set of 241s hand ported, and it just costs way too much.
a couple companies to look at are Patriot, Livernois, and Texas-Speed
your best bet is probably to buy a set of CNCed LS6 heads, you can get them for $1000 shipped from some of our sponsers. they would increase your compression to about 10.5:1 and would flow better than ported 241s.
getting CNCed 243 (LS6/LS2) heads will give you better results without spending as much money. i've looked into having a set of 241s hand ported, and it just costs way too much.
a couple companies to look at are Patriot, Livernois, and Texas-Speed
10-25-2006, 09:23 AM
#3
Yea, I have looked at TSP & was originally gonna go with them. But this local guy said his did the following after getting them done.
flowed:
296-300 @ .550 for intake
230-240 @ .550 for exhaust
And put down:
412hp/405tq thru 4l60e, TH-350, 4800 stall, 12-bolt & 28" tires.
He said it wouldn't be impossible for me to hit 450 thru my 6-speed & 10-bolt if they were ported like his. He said they were never flowed again at higher lift as he changed cams & went bigger, but they still are being used with his new set-up.
Should I expect more from a set of TSP heads with the givin cam selection??
flowed:
296-300 @ .550 for intake
230-240 @ .550 for exhaust
And put down:
412hp/405tq thru 4l60e, TH-350, 4800 stall, 12-bolt & 28" tires.
He said it wouldn't be impossible for me to hit 450 thru my 6-speed & 10-bolt if they were ported like his. He said they were never flowed again at higher lift as he changed cams & went bigger, but they still are being used with his new set-up.
Should I expect more from a set of TSP heads with the givin cam selection??
10-25-2006, 10:45 AM
#4
Launching!
iTrader: (1)
Join Date: Sep 2002
Location: Flint, MI
Posts: 258
Likes: 0
Received 0 Likes
on
0 Posts
the problem w/ hand ported heads is you can never duplicate a set of heads, i would say do the livernois heads, they flow better then that for about a grand, and its a 243 casting, so they arent maxed out
10-25-2006, 11:40 AM
#6
Who said they were hand ported & this guy is VERY experienced. He didn't say it would definetly hit those numbers, but said it wouldn't be impossible with a 6-speed & 10-bolt. If he hit 412 with all his power robbing parts, then if it had been behind a 10-bolt it would have put down even more.
After reasearching more & more I might just go with a set of Livernois stage 1 heads for my application. I just initially thought getting a set ported could end up being cheaper in the end. But I have discovered CNC port/valve jobs is where the most cost starts coming in.
After reasearching more & more I might just go with a set of Livernois stage 1 heads for my application. I just initially thought getting a set ported could end up being cheaper in the end. But I have discovered CNC port/valve jobs is where the most cost starts coming in.
10-26-2006, 09:13 AM
#7
We can CNC port your heads, install Ferrea 6000 series 2.02"/1.57" valves, our Patriot Gold dual springs, perform our 5 angle valve job, hand blend the bowls, and mill to your specs for $900.00. Or we can do you a brand new set of ported 243 castings assembled for $1295.00. Give us a call if you have any questions.