Great LSx head, and for a budget? TFS as-casts

[styles2769]

For over the last week, I have been talking to a well known name that was suppose to build my car but business really tied him down to his shop. Myself and Ron Mowens at Vengeance Racing (formerly from GMPP) have been looking for a close to stock runner or better for air speed, great low/mid-lift airflow to work perfectly with my small cam and LS6 intake, but be less then 2k. For week I was looking at the AFR 205 head and having those hand worked to pull high lift flow down and increase low/mid-lift flow on a 3.900 bore. Those heads woul dhave been perfect but for 3k, no way!

Ron turned me to TEA/TFS. We were looking at 2 heads, the TEA stage 2 LS6 and the TFS as cast. The TFS is a cast version of the TFS 215 cnc ported head that has done so well. While the as cast is a 220 runner, the airspeed is very good and flow numbers are great across the board. For me, I want to increase the flow from .200-.400, keep the .500 right around where it is at and I am not really concerned about anything over 305cfm as the intake selection for the LS1/LS6/LS2 does not exceed 295-300 with a ported FAST90/NW92tb (FAST92 is really no different in terms of performance over the 90, just a bigger TB opening which a 90 can easily be modified for.)

Here is a link to posted flow numbers from the TFS as-cast with a 1-7/8 pipe, 3.900 bore @ 64cc.

http://static.trickflow.com/global/images/chartsguides/t/tfs_af_genx_ss_ls1.pdf

[03scgt]

whats this set run?

[styles2769]

oh sorry... $1600.00

[03scgt]

seems like a pretty good deal.its funny how much more your guys heads are than a fords.a set of livernois or or vt prepped heads are only 12-1600 for a badass set.

[styles2769]

well decent heads for our cars run from 1100-1600. the great heads are around 2k-2300. for optimized heads, you have to go with the big named aftermarket castings and have those hand ported to your combo but is only for all-out racing heads.

[klutch]

well an aftermarket casting has a thicker deck= less likely to warp if going FI or N20. FYI.

Thats seems like a good cheap build up for sure.

[ls2bait]

im debating selling my tfs cnc 215's. wonder what theyd go for.

[styles2769]

Looking ot step up to a 225 or 235 head? What type of price do you have in mind for your heads? Depending on the price and the work done to them, I may be interested in picking them up and holding on to them for a bit until I can afford an intake and put the top-end on all at the same time.

[ls2bait]

no idea about price. i havent looked into it. just tossed the idea around going to a 235. but i cant mill them enough to get the cr where i want it with my cam so i dunno.

[titter]

Have you thought about the new PRC 237s? What CR do you want to run?

http://www.texas-speed.com/shop/item.asp?itemid=992&catid=20

[styles2769]

Have you thought about the new PRC 237s? What CR do you want to run?

http://www.texas-speed.com/shop/item.asp?itemid=992&catid=20

Not a bad head, but I think he would be better off going ETP, TFS, or AFR. Ofcourse there is going to be more money spent on anyo f those 3 heads over the PRC head.

Tommy, what pistons and cam are you running?

Are you going to keep the same cam if you do decide to upgrade the head?

I am guessing your wanting a 11:1 CR or slightly higher to safely run pump gas on the street correct?

Do you know what your current clearence measures out to?

[slow2v]

seems like a pretty good deal.its funny how much more your guys heads are than a fords.a set of livernois or or vt prepped heads are only 12-1600 for a badass set.

trickflow is where its at :thumbup:

[ls2bait]

Not a bad head, but I think he would be better off going ETP, TFS, or AFR. Ofcourse there is going to be more money spent on anyo f those 3 heads over the PRC head.

Tommy, what pistons and cam are you running?

Are you going to keep the same cam if you do decide to upgrade the head?

I am guessing your wanting a 11:1 CR or slightly higher to safely run pump gas on the street correct?

Do you know what your current clearence measures out to?

manley 10cc dish pistons, comp lsl lobe 247/254. current drop is a little over .100 on both sides. but the heads are milled to 60cc. i want to maintain the 11.5:1 and they would be a lot to take off a tfs 235.

[styles2769]

Why is that, is it because of the Valve size difference? I havent really looked at the 235 very much at all so I dont know how much of a deck is there and what size valves they are using. Cam looks ok for the set-up but a 254 is a LSL lobe? With the new cams, Comp is running a 16 degree split on a 113 i believe. The rep I spoke to said that during testing, that split really work well on the larger cube app's. Not sure if it would be worth the cost for you to go with a TFS225 over what you already have. Maybe jus thave you heads opened up a bit and a slightly bigger valve put in on both sides.

[ls2bait]

Why is that, is it because of the Valve size difference? I havent really looked at the 235 very much at all so I dont know how much of a deck is there and what size valves they are using. Cam looks ok for the set-up but a 254 is a LSL lobe? With the new cams, Comp is running a 16 degree split on a 113 i believe. The rep I spoke to said that during testing, that split really work well on the larger cube app's. Not sure if it would be worth the cost for you to go with a TFS225 over what you already have. Maybe jus thave you heads opened up a bit and a slightly bigger valve put in on both sides.


ya they advertise a 255 but its actually 254. and i would run into valve clearance issue is i decked a 235 that much and id loose a lot of deck thickness which i dont want to do.