prc 215s or advanced induction 243s?
Did you actually read the thread?
PI LXR 215s
Here is some info on who makes them
https://ls1tech.com/forums/dynamomet...o-results.html
All found right here with very little effort.
I am aware that the dyno chart in the link has more power but there are a lot of other things different as well, so the other link where only the heads were changed is still an interesting comparison.
PI LXR 215s
Here is some info on who makes them
https://ls1tech.com/forums/dynamomet...o-results.html
All found right here with very little effort.
I am aware that the dyno chart in the link has more power but there are a lot of other things different as well, so the other link where only the heads were changed is still an interesting comparison.
My understanding is that you can run stock rockers with a shim kit on TFS 215'S. Also, I imagine new prices are inflated, but it's a worst case scenario.
TECH Addict
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From: South Florida
Here is a comparison of "superior" aftermarket heads to the AI 243s.
https://ls1tech.com/forums/dynamomet...-gm-5-3-a.html
https://ls1tech.com/forums/dynamomet...-gm-5-3-a.html
Thanks. I'm debating with myself on which route to go. If I do ported 243/799 heads, I'm going to go with Ed Curtis at Flowtech Inductions. I saw on one of the LS1GTO forums a guy with Ed's CNC'd 243's and one of Ed's custom cams make 463/418 to the tires. I believe that was also with an LS6 intake. I like your point about aftermarket rockers/guides when going with aftermarket castings. Would these be required if you went with AFR heads?
TECH Senior Member
Joined: Mar 2004
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From: BFE
Whenever they use bronze guides, after-market rockers are preferable. Otherwise guides will wear out prematurely. Another option is to use stock guide materials.
well we ended up going with the prc 215's.We did this for a number of reasons,but the biggest reason is we can order them with 62cc chambers and keep lots of ptv clearance at the same time.I plan on setting him up with some .040 or .045 cometics with this setup.This will allow us to keep his compression high,good quench and much better efficiency. We didnt want to flycut or mill the heads,and wanted to be able to slide in a larger cam in the future if he does gears or wants to change his setup.We got the heads with the powdered metal guides for greater durability with the factory rockers.Overall he is going to have a nice setup with great average torque and great power up top.I am hoping to get him to 440 with his ls6 intake.
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dam this was a good *** thread! I picked up some PRC 215s used on here about 2 months ago for 1525. I still haven't put em on but when i do im hoping to gain at least 40whp through my auto and 12 bolt.
I think the ported ls6/ls2 heads are a great head and flow good numbers. but for a few extra dollars why not get the prc 215s? you can still run the stock rockers. either way you go im sure your gonna be satisfied with the gains and performance. your debating over 2 great heads so you cant go wrong here.
I think the ported ls6/ls2 heads are a great head and flow good numbers. but for a few extra dollars why not get the prc 215s? you can still run the stock rockers. either way you go im sure your gonna be satisfied with the gains and performance. your debating over 2 great heads so you cant go wrong here.
TSP have Aaron send me some PRC227s at 57cc and i will back to back test them vs my TFS215s...Just need you guys to turn down some ls3 valves and it will be an A-B comparision with a car that puts down 525rwhp now and runs 9.8s...If they make more power i will gladly purchase them and I am sure you will sell a ton following the results...
I can document the whole process too, with a bunch of pics and videos
I can document the whole process too, with a bunch of pics and videos
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Joined: Apr 2010
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From: South Florida
If you already have the 243/799 heads, sending them to AI, getting them fully ported for $995, I would say that is the most budget friendly head out there. And with the right cam can net some really good numbers.
51cc chambers that still flow well. Around 13:1 compression. Someday I'll have some dyno numbers for this thread. A good 3-6 months away. 
I try to inch out every bit where I can. Custom domed pistons are not the most efficient way to go. A flat top piston promotes the best burn from everything I have read. The dome top can offer too many inconsistencies with burn performance. It can be done, but the flat top keeps it elegant and simple. Although domes would be cheaper. Custom chamber work like this gets a bit pricey. Well beyond that of a dedicated casting if you get crazy like I did. This head is a pure gamble and might just be an extremely expensive moderate performer. I am dying to find out, but its going to be many months.
I try to inch out every bit where I can. Custom domed pistons are not the most efficient way to go. A flat top piston promotes the best burn from everything I have read. The dome top can offer too many inconsistencies with burn performance. It can be done, but the flat top keeps it elegant and simple. Although domes would be cheaper. Custom chamber work like this gets a bit pricey. Well beyond that of a dedicated casting if you get crazy like I did. This head is a pure gamble and might just be an extremely expensive moderate performer. I am dying to find out, but its going to be many months.
Launching!
Joined: May 2010
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Both AI 243/799s and TSP 243/799 heads lay down some good dyno numbers.