Thread:

Dart 310 folow-up.

Well the Dart heads are done and here are the results.

Before:

right/left ex

.2 140 / 141 / 111
.3 207 / 207 / 151
.4 271 / 271 / 192
.5 322 / 312 / 227
.6 351 / 329 / 254
.7 365 / 329 / 271
.8 341 / 335 / 281

Now:

rh / lh / ex

.2 166 / 165 / 117
.3 216 / 214 / 165
.4 281 / 279 / 193
.5 328 / 312 / 235
.6 356 / 336 / 258
.7 365 / 353 / 278
.8 365 / 360 / 288

This was after quite a bit of work...far more work than I put into the AFR's and no where near the flow numbers. My goal was to balance the left/right imbalance, get the right port to not go backwards after .700, and pick up the low lift numbers...which I did, but interestingly enough, the .700 number on the right port didn't chcange one cfm. Given all the work I did, I would have expected to see some increase, but not this time. Still not bad numbers, but the AFR makes this dart head look silly with one tenth of the effort. Again, this was supposed to be a simple out-of-the-box, bolt-and-go set of heads that turned out needing a lot of work for mediocre results. I'm not bashing Dart, but AFR FTW on this one, big time.

Thanks for the follow up Scott.

Is there a reason why you and some manufacturers don't show flow at .100" lift? Do you have any pictures of them before and after?

Originally Posted by steelcomp

Well the Dart heads are done and here are the results.

Before:

Left/right/ex

.2 140 / 141 / 111
.3 207 / 207 / 151
.4 271 / 271 / 192
.5 322 / 312 / 227
.6 351 / 329 / 254
.7 365 / 329 / 271
.8 341 / 335 / 281

Now:

rh / lh / ex

.2 166 / 165 / 117
.3 216 / 214 / 165
.4 281 / 279 / 193
.5 328 / 312 / 235
.6 356 / 336 / 258
.7 365 / 353 / 278
.8 365 / 360 / 288

This was after quite a bit of work...far more work than I put into the AFR's and no where near the flow numbers. My goal was to balance the left/right imbalance, get the right port to not go backwards after .700, and pick up the low lift numbers...which I did, but interestingly enough, the .700 number on the right port didn't chcange one cfm. Given all the work I did, I would have expected to see some increase, but not this time. Still not bad numbers, but the AFR makes this dart head look silly with one tenth of the effort. Again, this was supposed to be a simple out-of-the-box, bolt-and-go set of heads that turned out needing a lot of work for mediocre results. I'm not bashing Dart, but AFR FTW on this one, big time.

good job on the heads......

Looks like it's time for me to get busy! Good numbers Steel!

Do you have the AFR numbers somewhere and I missed them?

Originally Posted by Widetrack

Looks like it's time for me to get busy! Good numbers Steel!

Do you have the AFR numbers somewhere and I missed them?

Go to the dyno section and look for the AFR/Dart comparison it's on the first page post #14 had his final numbers.

AFR/Dart flow comparison, real world, out-of-the-box.

Originally Posted by Carnivalride

Go to the dyno section and look for the AFR/Dart comparison it's on the first page post #14 had his final numbers.

AFR/Dart flow comparison, real world, out-of-the-box.

Thanks!

another self promotional thread, part deux. The spam police will be here any minute to shut this thread down.
Interesting info.Specially considering that Dart was suppose to have fixed much of the out of the box flow issues with the changes in the "Platinum" series

Originally Posted by gn7

another self promotional thread, part deux.........

Damn GN, that's harsh. He's really here to "help" people, not simply just to promote his business. So Steel, someone told me that you did the flow measurments for Dart's ads when you worked there. Is that right, inquiring minds want to know? Regardless, good job on the flow numbers, they should make a very nice little street/lake motor... Ya'll take care now.

Originally Posted by tigertooth

Interesting information Scott. just put a set of AFR 315 cnc combustion chamber heads on a customers 475. 13:1 with a decent looking bullet cam and a single dominator. looking forward to dynoing it as i had a similiar motor a few years ago with Brodix -2 cnc's to compare it too.

The AFR 315 is an excellent head, much better choice than the Brodix-2 CNC IMO. Maybe a tad big for most 475's, but with 13:1 I'm guessing you're looking for some pretty big power and going to turn it up a bit. That 315 will serve you well.

Originally Posted by DEL51

Are the canfields going to resurface under a new name? I remember you seemed to like them.

At one time I thought so, but at this point I'm not sure what the deal is.