PRC 237cc people come in
12-15-2012, 05:21 AM
#21
There are a ton of results from TFS 225/235 or even AFR 225s from over the years. One thing to remember is the LS platform is now going on 15 years old. A lot of folks who invest and build in the big strokers did so years ago back before the LS7/LS3 stuff was the norm. I'm talking like 2008-2009 for a lot of "402/416" type builds with cathedral port heads. But before then, from 2005-2007 you'll see more results from things like AFR 225s making good power on 408s and 402s.
People coming into the LS scene over the last couple of years have moved on to LS3 or LS7 type stuff, especially if they are buying the cars with those heads already on them.
People coming into the LS scene over the last couple of years have moved on to LS3 or LS7 type stuff, especially if they are buying the cars with those heads already on them.
12-15-2012, 08:34 AM
#22
Yea theres def no shortage of afr and tfs threads and i have yet to see one that didnt make good numbers. Im just so nervous about sinking $2300 in a set of heads and then wish I had went with a tried and true option. But on the flip side they work great Ill save about $150
12-15-2012, 09:48 AM
#24
ive got the $150, the money isnt the issue per say. The hot rod article had the prc's way up as #2 with the TFS #1. I think they would be a great head, and for slightly less, but its hard to make that call when I hardly see anyone running them. I dont think I'll go wrong either way...
12-15-2012, 07:45 PM
#26
I just wish TSP offered a service to remove the extra bolt hole. Not everyone runs a 6bolt block. IMO its a eyesore.
12-19-2012, 11:00 AM
#30
We can mill the extra off the 6-bolt casting, but why? I get that it looks strange, but if you ever do get the chance to go with an LSx or RHS block, they'd be ready. Also if you changed directions and wanted to sell them, having the extra bolt holes would be a plus!
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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POWERBOND - ASP - AND MORE!
12-19-2012, 02:34 PM
#32
We can mill the extra off the 6-bolt casting, but why? I get that it looks strange, but if you ever do get the chance to go with an LSx or RHS block, they'd be ready. Also if you changed directions and wanted to sell them, having the extra bolt holes would be a plus!
12-19-2012, 04:52 PM
#33
We can mill the extra off the 6-bolt casting, but why? I get that it looks strange, but if you ever do get the chance to go with an LSx or RHS block, they'd be ready. Also if you changed directions and wanted to sell them, having the extra bolt holes would be a plus!
One example reason, Because Kooks 1 7/8 TBSS headers do not fit the heads due to the 6 headbolt patern. Passanger side ears for cyl's 2 and 3 hit the tubes since they make such a quick bend back.
I ran in to that issue in my 63 pick up trying to use the TBSS headers. Let's just say I am back to my 1 3/4 stepped to 1 7/8 as I did not want to cut the ears off. Still making 546rwhp..
12-19-2012, 05:21 PM
#34
One example reason, Because Kooks 1 7/8 TBSS headers do not fit the heads due to the 6 headbolt patern. Passanger side ears for cyl's 2 and 3 hit the tubes since they make such a quick bend back.
I ran in to that issue in my 63 pick up trying to use the TBSS headers. Let's just say I am back to my 1 3/4 stepped to 1 7/8 as I did not want to cut the ears off. Still making 546rwhp..
I ran in to that issue in my 63 pick up trying to use the TBSS headers. Let's just say I am back to my 1 3/4 stepped to 1 7/8 as I did not want to cut the ears off. Still making 546rwhp..
12-20-2012, 11:27 AM
#35
Had TFS235 personally and they were pretty badass heads! Never really got to push the car with them either but still ran respectable times at the track. Mine were out of the box heads that didn't have special tweaks done to them.
I'm going with TFS245's on the next engine. Fastest LSX in the world runs TFS235's!
I'm going with TFS245's on the next engine. Fastest LSX in the world runs TFS235's!
12-22-2012, 04:45 PM
#38
:::::::::::::::chicken sounds:::::::::::::
12-23-2012, 12:06 PM
#40
TECH Enthusiast
On my 402, We spin my tiny little 226/238 cam to 7000 rpms+ and its clean as a whistle....No detectable valve float. This is with only 150#s on the seat and 410#s open on stock LS7 lifters. This is also with heavy 7/16" and 3/8" taper wall push rods.. It does start losing power after 6400 rpms obviously but it doesnt just nose dive...it still pulls clean to 7000..(which I need to clear the traps in 4th on a 26" tire)
Heads are Mast 245 cathedrals, 2.16" hollow stem intake valves...I don't recall the weight but they were still pretty heavy I believe...maybe around 105 grams or so?.... Exhaust valves are inconel. We used stock LS7 rockers and no trunion upgrades/mods or anything...
Also this is at around 23 psi of boost at 6800 rpms.... Stock LS6 intake/TB..
Mast's are not quite as budget friendly as the PRCs...( I believe the PRCs are great bang for the buck, I'd run them in a heartbeat but with hollow stem intake valves.)
Heads are Mast 245 cathedrals, 2.16" hollow stem intake valves...I don't recall the weight but they were still pretty heavy I believe...maybe around 105 grams or so?.... Exhaust valves are inconel. We used stock LS7 rockers and no trunion upgrades/mods or anything...
Also this is at around 23 psi of boost at 6800 rpms.... Stock LS6 intake/TB..
Mast's are not quite as budget friendly as the PRCs...( I believe the PRCs are great bang for the buck, I'd run them in a heartbeat but with hollow stem intake valves.)