Jeff@TotalPerformanceEng

iTrader: (6)

I got some of the new TFS 245cc heads coming for the 454LSx I'm having built. I cant seem to find any flow #'s or comparisons to the TFS 235's.

What kind of gains should be noticed? I know the 235's have some unbelieveable mid lift flow #'s. Do you think the 245's will have a comparible flow? Do you think I will notice any low speed/partial throttle issues.

slow trap

iTrader: (22)

with a 245 cc runner that 454 will still have huge midrange. i would venture to say the 245 runner will probably be up 10-20 cfm in the .500 on up range but that would be just a guess. pm or call brian tooley and i'm sure he will be glad to answer your questions.

beardWS6

iTrader: (1)

If they where ET 245`s I could help you! Good luck on the set-up!!

Brian Tooley Racing

iTrader: (13)

Talk about nailing it...

The TFS 245 heads flow around 10 cfm more air than the TFS 235's from .500" on up.

Mike@TEA

Flow numbers for the 245 are now posted on our site.

http://www.totalengineairflow.com/pr...gmhead/tfsls1/

Jeff@TotalPerformanceEng

iTrader: (6)

Thanks for the heads up. I just got off the phone with Bryan at LME and he said my heads are being worked on as we speak..

I'll tell you what, although the 245's flow great, it really goes to show you how well your 235's flow. Had their been a big difference i price, I would have gone with the 235's instead. Those things are just awesome..

245cc Flow Data
Intake Exhaust
0.100 69 56
0.200 146 130
0.300 237 201
0.400 294 249
0.500 336 269
0.550 348 273
0.600 353 276

Tested on 4.185" bore @28

GTFORMULA

iTrader: (94)

What would they flow on a 4.00 bore ? Would they even fit the bore? I know they are probably better on a big bore but some like me are not going to have one but would like a max effort head. Maybe go down to a 2.08 valve if that would make it work better on a 4.00.

Mike@TEA

What you are asking for is a 235 head.

GTFORMULA

iTrader: (94)

No. The 245 head. I see that the flow data stops at 600 lift also. Could we see beyond the 600 mark ? Thanks alot and I am very interested in buying a set of the 245's.

Mike@TEA

I'm sorry I should have explained myself. If you put a 2.080 valve in the 245 head you would pretty much have a 235 head, the flow numbers would look very similar to the 235 head. The problem with these heads that are developed specifically for big bore applications is they tend to underperform when put on smaller bore's. Also these heads are developed for big airflow from .300-.550" lift they tend to flatten out after .600". We could change some things around to make them flow at higher lifts but that would be the at the sacrifice of mid lift airflow.

GTFORMULA

iTrader: (94)

I was still like to see the flow numbers of 600+ to see what cam combo would work the best.

beardWS6

iTrader: (1)

Not to hijack your thread but this is what my ET 245`s did after Greg Good cleaned them up. These heads flowed very we`ll before he got them

These are the numbers from my bench. 28", 4.030" bore, and no pipe on the exhaust port.


Intake Exhaust
.200" 148 117
.300" 228 160
.400" 301 196
.500" 339 247
.600" 354 263
.650" 354 269
.700" 355 272

Hope this helps! But TFS makes a awsome head, then let Greg play with them!

Brian Tooley Racing

iTrader: (13)

I see your sig says sheetmetal intake, are you still running it?
How much power did your combo make?
Thanks.

JL ws-6

iTrader: (50)

I think it would be an intresting comparison to put a set of the 235's or 245's (if the 245's are set up for a 4 inch bore) on and test them back to back against a set of the ET 240's to really see how they stack up.

I am going to guess, that the cam selection would be relativly close to the same for both applications, I am unsure if both are available in the same combustion chamber size or not but of course that would have to be maintained as well for consistancey compression wise. Also have to set the et head up with the same rockers, just to make sure there's on inconsistancey there as well.

GTFORMULA

iTrader: (94)

I would think that the ET heads would cost alittle more. Dont you have to get their rocker stands and possibly new rockers ?

I would still like to see the flow numbers after 600 lift.

JL ws-6

iTrader: (50)

The ET heads will work with stock rockers and their rocker stands, that is what I'm running myself. The trickflow's you have to use an aftermarket rocker, which in that case I think you could do the same with the ET head and be fine as well... so it's a mute point. Either buy aftermarket rockers or the stands for the et heads, or buy the rockers for the trickflows......


I still think it would be a good real world test if you could do a swap with the 2 and see what you get. I don't really want to rip my car apart for what I suspect would be little to no gain, so I'm not gonna do it.... but someone with an engine dyno and some tiem on their hands, it would be intresting.

davidws6

iTrader: (36)

I seen this post and thought I'd chime in...

Looking to build a 455 for my TA and would like to keep the FAST 90/90 as the LS7 stuff really does not flow a huge amount more than this.
Not really looking for red line hp on my setup but want midrange torque so these heads might do well ???? I have Dynamax 1 3/4 stainless headers that I was thinking of reusing on the car also.
What do you all think?

Thanks for any info,
David

bifster

so let me get this right.... the LS& heads still flow more then these ported heads? what about portin an LS7 head what would happen then???

silverbeast

iTrader: (16)

I think you need to get bigger headers for that or you will choke the hell out of it.

JL ws-6

iTrader: (50)

I was always under the same assumption with the header side, but I've heard of soem recent results with an lsx that's over 430CI running 1 3/4 headers that trapped 148 n/a, so I'm not as sold on needing them as I was. Of course it's a solid roller setup that is running on 116 race fuel, but still that's on the extreme end of things and the smaller header doesn't seem to be holding that car back at all, would it run faster with a bigger header maybe but they're not at a point that will say yes or no to that at this point.