Got my hands on some TF 240's with flowbench results

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RAMM

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I recently had a customer bring in a set of 240's to look over. I offered to put them on the flowbench for the knowledge. Again TF is making some nice products for the Mopar crowd. J.Rob

.100 72.5
.200 150.3
.300 219.2
.400 273
.500 307
.550 316
.600 316
.650 322
.700 321
.750 321
.800 321

TF240onSF1020.jpg
 
Very close to what I see.

My numbers at .200 & .300 are a little higher.

I’ve tested about a dozen of those heads...... they’ve always been within a few cfm of each other.
 
Found it so I dropped it here -


"I don't know where the customer acquired them but I was shipped a pair of TF 270's for the upcoming Twin Trq-Storm SC 452 build. I disassembled them as a spring change is in order amongst checking the guides and seat work. Pulled up Trickflow's advertised flow numbers and put one on the SF-1020. I have a doweled plate that mounts the head perfectly as it would be on the block and the bore insert I used was exactly what TF states = 4.350".

Very impressed the flow numbers are pretty much bang on.

.100" 71.7
.200" 154.9
.300" 228
.400" 285 <<<This is a stellar flow rate for a conventional BBM
.500" 319
.600" 339
.700" 351

Well done I'd say. Now I'd like to see the small block TF's--At this point I'd trust the TF claims. J.Rob"
 
As per flow numbers, is it worth stepping up to the 270 on a non stroker 440 ? would the port velocity loss at lower RPM bother?
for discussion sakes lets say a +.030 10.5:1 engine spinning 6500 rpm ...
 
Found it so I dropped it here -


"I don't know where the customer acquired them but I was shipped a pair of TF 270's for the upcoming Twin Trq-Storm SC 452 build. I disassembled them as a spring change is in order amongst checking the guides and seat work. Pulled up Trickflow's advertised flow numbers and put one on the SF-1020. I have a doweled plate that mounts the head perfectly as it would be on the block and the bore insert I used was exactly what TF states = 4.350".

Very impressed the flow numbers are pretty much bang on.

.100" 71.7
.200" 154.9
.300" 228
.400" 285 <<<This is a stellar flow rate for a conventional BBM
.500" 319
.600" 339
.700" 351

Well done I'd say. Now I'd like to see the small block TF's--At this point I'd trust the TF claims. J.Rob"

thank you !
altho, I`m disapointed in the flow numbers, my victor type cnc standard, raised port heads flow more than that =354@.600 , I figured the 270`s to be much better than they are .---------??? thanks again .
 
Never assume flow numbers gleaned from different benches are truely “Apples to apples”.

Well, at least I never do.
 
thank you !
altho, I`m disapointed in the flow numbers, my victor type cnc standard, raised port heads flow more than that =354@.600 , I figured the 270`s to be much better than they are .---------??? thanks again .

What do your Victor's flow @ .400"? J.R.
 
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