A little cylinder head help needed.

Rev · 03-06-2007, 05:45 PM

I'm looking at the chart that came on the box that my TFTW heads came in.

.1 intake lift.............. 63 cfm, Exhaust lift...........53 cfm
.2 ......................... 141 cfm, ........................107 cfm
.3 ......................... 205 cfm, ........................144 cfm
.4 ......................... 233 cfm, ........................171 cfm
.5 ......................... 251 cfm, ........................187 cfm
.6 ......................... 251 cfm, ....................... 193 cfm

Looks like your Canfields beat the TFTW's all to heck flow-wise. With that big of runners (192 vs. 170), be sure that you don't have too much head for your application with those Canfields.

Rev

Dark_5.0 · 03-06-2007, 06:25 PM

Quote:

Originally Posted by Rev

I'm looking at the chart that came on the box that my TFTW heads came in.

.1 intake lift.............. 63 cfm, Exhaust lift...........53 cfm
.2 ......................... 141 cfm, ........................107 cfm
.3 ......................... 205 cfm, ........................144 cfm
.4 ......................... 233 cfm, ........................171 cfm
.5 ......................... 251 cfm, ........................187 cfm
.6 ......................... 251 cfm, ....................... 193 cfm

Looks like your Canfields beat the TFTW's all to heck flow-wise. With that big of runners (192 vs. 170), be sure that you don't have too much head for your application with those Canfields.

Rev

Thanks Rev,

Wow the Canfield really out perform the trickflows at the lower lift levels.

I guess the Trickflows can go on my back up motor.

andy669 · 03-06-2007, 06:46 PM

Intake port volumes can be extremely mis-leading, as well as comparing a companys advertised flow numbers versus a shops numbers.

The TW on average has an intake port that is a full half inch shorter than most inline ford heads, making the port volume look 'low'. Comparing cross sectional area is worthwhile.

Flow numbers from bench to bench can vary alot. Theres so many different calibrations and ways to flow cylinder heads no 2 benches are the same. I've seen 30 cfm difference in some peoples numbers, from the bench that I use.

Flow them back to back on the same bench would be the best way to compare numbers. And the head that flows the best might not make the most power either.

Andy

Jeff Chambers · 03-06-2007, 10:05 PM

What Andy says. I've flowed alot of heads over the years on the same bench and haven't found the advertised numbers to be very accurate. Remember, Confusius say..."Believe only have of what you read in the magazines and be suspect of that half you do believe."

~The Jester~ · 03-08-2007, 08:21 PM

I'm a BIG Canfield fan, so I can't be 100% unbiased here.

BUT, I'd be VERY surprised if an untouched set of TF's outflowed an unshrouded set of Canfield's.

Just my $.02!

Dark_5.0 · 03-08-2007, 11:08 PM

Quote:

Originally Posted by ~The Jester~

I'm a BIG Canfield fan, so I can't be 100% unbiased here.

BUT, I'd be VERY surprised if an untouched set of TF's outflowed an unshrouded set of Canfield's.

Just my $.02!

Yeah thats what I figure also. As soon as my ARP head studs show up I am bolting those bad boys on.

rwhite65 · 03-08-2007, 11:51 PM

I knew the Jester would pipe in on that one.....just took him longer then I thought it would

03-06-2007, 05:45 PM	#1
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: A little cylinder head help needed. I'm looking at the chart that came on the box that my TFTW heads came in. .1 intake lift.............. 63 cfm, Exhaust lift...........53 cfm .2 ......................... 141 cfm, ........................107 cfm .3 ......................... 205 cfm, ........................144 cfm .4 ......................... 233 cfm, ........................171 cfm .5 ......................... 251 cfm, ........................187 cfm .6 ......................... 251 cfm, ....................... 193 cfm Looks like your Canfields beat the TFTW's all to heck flow-wise. With that big of runners (192 vs. 170), be sure that you don't have too much head for your application with those Canfields. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

03-06-2007, 06:46 PM	#3
andy669 Registered Member Join Date: Jan 2001 Location: Moline Il Posts: 901	Re: A little cylinder head help needed. Intake port volumes can be extremely mis-leading, as well as comparing a companys advertised flow numbers versus a shops numbers. The TW on average has an intake port that is a full half inch shorter than most inline ford heads, making the port volume look 'low'. Comparing cross sectional area is worthwhile. Flow numbers from bench to bench can vary alot. Theres so many different calibrations and ways to flow cylinder heads no 2 benches are the same. I've seen 30 cfm difference in some peoples numbers, from the bench that I use. Flow them back to back on the same bench would be the best way to compare numbers. And the head that flows the best might not make the most power either. Andy __________________ 88 coupe 91 LX NMRA Pure Street 5120

03-06-2007, 10:05 PM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: A little cylinder head help needed. What Andy says. I've flowed alot of heads over the years on the same bench and haven't found the advertised numbers to be very accurate. Remember, Confusius say..."Believe only have of what you read in the magazines and be suspect of that half you do believe." __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

03-08-2007, 08:21 PM	#5
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: A little cylinder head help needed. I'm a BIG Canfield fan, so I can't be 100% unbiased here. BUT, I'd be VERY surprised if an untouched set of TF's outflowed an unshrouded set of Canfield's. Just my $.02! __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

03-08-2007, 11:51 PM	#7
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: A little cylinder head help needed. I knew the Jester would pipe in on that one.....just took him longer then I thought it would __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

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