96capricemgr

iTrader: (1)

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.

wytry

iTrader: (6)

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.

Camaroking1996

That is an awesome thread and side by side comparison!

Rise of the Phoenix

iTrader: (27)

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?

PREDATOR-Z

Whenever they use bronze guides, after-market rockers are preferable. Otherwise guides will wear out prematurely. Another option is to use stock guide materials.

redtail2426

iTrader: (10)

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.

mac62989

iTrader: (1)

Link please.

99fbodyTA

prc 215's are better, ai's are cheaper

01ssreda4

iTrader: (96)

^^ gotta love technical responses like that

Cosmos

iTrader: (15)

^ probably has no experience with either

SF 1HOTLS1

iTrader: (24)

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.

Suzaku

iTrader: (3)

Hey Chris, any updates?

Camaroking1996

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.

95ONE

iTrader: (1)

Unless you can TIG weld some material in there and then re-shape. (799's with full valvetrain) 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.

chrs1313

iTrader: (24)

^^very nice...why not just get some custom pistons though to bump the compression?

chrs1313

iTrader: (24)

Crickets lol, never heard anything

95ONE

iTrader: (1)

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.

PREDATOR-Z

A while back, Patriot used 317 castings (71cc) and made smaller ones using that method.

vmapper

iTrader: (8)

One would think, being more consistent with compression volume across all 8 cylinders via changing out the piston is better than than the human variance of adding material to each chamber and then grinding/polishing in both pairs of heads. Dont get me wrong, its fantastic work...

427LS7HCI

I've never seen or heard of a set of AI's outflowing TFS215s. I've seen where AI 243 heads were flowing 299-302 cfm @ .600 lift, however, eventhough they flow less than other heads, they produce some of the best dyno numbers. TEA 243s flow in line with Trickflow 215s, I believe somewhere around 322cfm @ .600. These are just peak numbers, TFS 215s flowed much better between .200-.500.


Both AI 243/799s and TSP 243/799 heads lay down some good dyno numbers.