TFS 245cc or LSX-LS3 Heads
10-23-2011, 03:31 PM
#1
TFS 245cc or LSX-LS3 Heads Hello
I'm building a LSX 427 with a K1 rotating assembly for a boosted application.
I have a new LSX block with the 6 bolt option for the heads. (Looking at a Whipple for boost)
I am looking at the TFS 245 or the LSX-LS3 heads and port type does not concern me at this stage however I can get a set of LSX-LS3 heads for about $600 cheaper than the TFS 245 heads.
My question is; what do people think will be the best option out of these two heads for this application.
I was considering the AFR 245cc heads but they are 4 bolt and if I have the 6 bolt block I may as well take advantage of this. I know there is a lot better heads out there but these two are in my price range and are available to me here in Aus.
Cheers
Jason
I'm building a LSX 427 with a K1 rotating assembly for a boosted application.
I have a new LSX block with the 6 bolt option for the heads. (Looking at a Whipple for boost)
I am looking at the TFS 245 or the LSX-LS3 heads and port type does not concern me at this stage however I can get a set of LSX-LS3 heads for about $600 cheaper than the TFS 245 heads.
My question is; what do people think will be the best option out of these two heads for this application.
I was considering the AFR 245cc heads but they are 4 bolt and if I have the 6 bolt block I may as well take advantage of this. I know there is a lot better heads out there but these two are in my price range and are available to me here in Aus.
Cheers
Jason
10-23-2011, 07:31 PM
#4
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If you are building a boosted 427, I would not be worried about a $600 difference in head costs. Personally, I'd suggest you look at the MAST LS7 heads for this application. They can be had in 6 bolt configuration and will flow better than either of the 2 you are interested in.
How much power are you looking to make? Boosted 427 can make a lot of power with the right combo - way more than could ever be used on the street.
How much power are you looking to make? Boosted 427 can make a lot of power with the right combo - way more than could ever be used on the street.
10-23-2011, 11:33 PM
#6
to the op, I would run ls3/ls7. they dropped cathedral port for a reason.
10-24-2011, 04:28 AM
#7
The power level I would like to get would be about 1000hp at the crank but I would still like to have room for improvement later on. I think that the TFS 245 has better flow numbers than the LSX-LS3 heads which are as cast.
I know the mast heads are good but would they be worth the extra dollars for a boosted engine?
Btw This engine is going to start its life in my 4x4 Nissan Patrol pick up (ute in Aus) and will probably end up in a gto with a couple of turbo's in the future.
Thanks
Jason
I know the mast heads are good but would they be worth the extra dollars for a boosted engine?
Btw This engine is going to start its life in my 4x4 Nissan Patrol pick up (ute in Aus) and will probably end up in a gto with a couple of turbo's in the future.
Thanks
Jason
Last edited by gouldy; 10-24-2011 at 04:34 AM.
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10-26-2011, 11:34 PM
#8
Any more opinions?
How much h/p would the mast be worth over the tfs 245, boosted or n/a?
Has any one gone from a similar cathedral port head to a mast ls3 or similar?
Thanks
Jason
How much h/p would the mast be worth over the tfs 245, boosted or n/a?
Has any one gone from a similar cathedral port head to a mast ls3 or similar?
Thanks
Jason
10-28-2011, 02:19 AM
#10
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TF 245s have there limit, the choke to cfm is optimal and they work very very well, but when it comes time to rev it up that port will go turbulent and do nothing, this is where a good square port with larger choke will shine. Basically solid roller applications or well set up hydro rollers making pk power 7000rpm plus. Realistically 245s are a small head for a big engine, if you go a larger choke with good cfm to cca ratio with the manifold matched (single plane or tunnel ram) it will murder any trickflow head off the shelf.
10-28-2011, 07:44 AM
#11
TF 245s have there limit, the choke to cfm is optimal and they work very very well, but when it comes time to rev it up that port will go turbulent and do nothing, this is where a good square port with larger choke will shine. Basically solid roller applications or well set up hydro rollers making pk power 7000rpm plus. Realistically 245s are a small head for a big engine, if you go a larger choke with good cfm to cca ratio with the manifold matched (single plane or tunnel ram) it will murder any trickflow head off the shelf.
12-01-2011, 10:03 AM
#12
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TF 245s have there limit, the choke to cfm is optimal and they work very very well, but when it comes time to rev it up that port will go turbulent and do nothing, this is where a good square port with larger choke will shine. Basically solid roller applications or well set up hydro rollers making pk power 7000rpm plus. Realistically 245s are a small head for a big engine, if you go a larger choke with good cfm to cca ratio with the manifold matched (single plane or tunnel ram) it will murder any trickflow head off the shelf.
Im going with the TFS245s for my 434 over an LS7 style head. Realistically, how many people are going to have their street cars above 7krpms? I want my engine to last and since I drive my car a lot during the summer, I'm okay with a sub 7k 600whp engne. Also, the mid lift numbers are much better when compared to the LS7 style heads. Mid range hp/tq are much better.
12-02-2011, 04:11 PM
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Im going with the TFS245s for my 434 over an LS7 style head. Realistically, how many people are going to have their street cars above 7krpms? I want my engine to last and since I drive my car a lot during the summer, I'm okay with a sub 7k 600whp engne. Also, the mid lift numbers are much better when compared to the LS7 style heads. Mid range hp/tq are much better.
12-02-2011, 08:35 PM
#14
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The TFS245 is a great head for a boosted motor i have a boosted427 with them sick power makes a great street/track motor
to the guy posting about them choking i have no idea what hes taking about. they have been run on motors pushing 1800hp which is enough for most people . and when i started looking for heads talking with the maker of these heads he said they wont really limit you till you try and go over 2000hp.
not trying to come off mean but 600 bucks is nothing when it coming to building a 1000hp car do it right the first time or you paid twice.
to the guy posting about them choking i have no idea what hes taking about. they have been run on motors pushing 1800hp which is enough for most people . and when i started looking for heads talking with the maker of these heads he said they wont really limit you till you try and go over 2000hp.
not trying to come off mean but 600 bucks is nothing when it coming to building a 1000hp car do it right the first time or you paid twice.
