i finally got my heads flowed... oh brother!!!

these were apparently "competition ported from AFR" WRONG!!! nf-way!

on the upside i should be able to make a few more ponies when they are done....properly . it is obvious they were hand worked but that is it.

ok intake side....
at 0.200 130 AFR #'s 138 down 8 cfm (from advertised numbers)
at 0.300 192 " " 207 down 15 cfm
at 0.400 239 " " 258 down 19 cfm
at 0.500 271 " " 294 down 24 cfm
at 0.600 287 " " 302 down 15 cfm
at 0.700 281 " " 309 down 28 cfm

exhaust side....
at 0.300 129 AFR #'s 150 down 21 cfm
at 0.400 155 " " 190 down 35 cfm
at 0.500 170 " " 207 down 37 cfm
at 0.600 180 " " 220 down 40 cfm
at 0.700 187 " " 230 down 47 cfm

i know there is a bit of variation from flow bench to flow bench but damn! that is just out to lunch! Pete at ARE offered to "fix" the heads, but i am sorry I can't take the chance of seeing what they come out like after they have at them again. they shouldn't have been that bad.. i think.

with the addition of the Hogan's sheet metal intake i hope it helps the car on motor a fair bit, oh almost forgot the bigger primary tube headers.

interesting enuff tidbit... my home ported/raised roof LT4 intake flow 265 cfm from 500 lift to 700 lift. and i only had a 1.5 cfm difference from the front to rear runners. i know of one other person actually doing what i did with the lt4 intake flowed on the heads and he saw 260 cfm through the intake.

the person flowing the intake is Barry Maskery, an old school engine builder. he is sorta kinda well known in thes parts

 

My AFRs 210s flowed more or less the same yours did...

AFR flows them with 4.155 bore, and htat makes a huge difference. mine where 70%cnc and finished by phil.

End numbers where 300cfm@600"lift.

 

damn...that thing is really gonna fly when you get some better port work done!

exhaust side sux!!!

 

well i personally know someone who is outflowing the AFR advertised specs with an lt1 block, and it isn't 4.155 bore. i would be happy getting close to the advertised numbers.

 

my afr raised runners flowed exactly what they said they would do..... they claimed 325 and i figured they would flow about 310ish so when i got them i put them on the bench at school and beleive it or not they went 325.. the lower lift number were alittle off but they went 325... i put a back cut on the valve and the picked up 15cfm at 2-400 lift and 8 at 5-600 lift..... but they flow alittle more than 325 now

 

As fast as you are going, I wonder which numbers are closer to accurate? Your numbers are less than my ported 195's flow (and I am confident in the numbers I have for mine). Something is fishy here! Like I said, maybe they are better than you think.

Rich

 

Dang I had a set of LT1 heads flowed here in washington and when they got to TX they flowed pretty much the same!

BTW I mine flowed 268 with the Modified LT1 intake on It is one of my own design

 

Man my 195's out flowed those I would be pissed. More performance did my Comp CNC work and I was a little disiponted that I didn't pick up more then I did.

CFM@ 28''

.200------.300------.400----.500-----.550------.600-----.650
I----E------I---E----I---E----I----E---I----E----I---E----I---E
139-115---205-160-254-185-280-198-283-205-285-210-285-215

 

rich,

with the cubic inch and 3400 # raceweight i should be running faster than i am. i have full confidence in the **** numbers my heads flowed. keep in mind these were not cnc'ed, that was a f'n lie! i never saw these heads off the car until i removed them last year, shame on me, i have learned a few things in the past couple of years, i guess i can thank ARE for that, lmao!!! most importantly, do it yourself if at all possible! or at least have your hands in on what is being done.

maybe i will call AFR to see what their bare castings flow? couldn't hurt at this point.
also rich, i am tossing a dentists office worth of nitrous at the car to run the number, mind you 2003 to 2004 was a good racing season, i went the same et with almost half as much nitrous being used, from the year before. so i am heading in the right direction, make the most N/A, then throw a dentists office worth of the gas at it, lmao!!!

you bet your *** i am pissed! but what can i do!

the numbers are relative, if when finished i pick up 20 - 30 cfm on the same flow bench, i will be satisfied. Barry was building race motors when i was merely a gleam in my father's eyes, lol!!!

marshall,

i am with you..after all is said and done, i'll let the et's prove or disprove what this measuring device is showing before and after, which should be in just over a month, until i get new flow numbers.

 

Yeah, your definitely going to find some power in those heads.

For comparison, these are the flow #'s for my heads, which started out as AFR cnc 195's, and a friend of mine ported them by hand afterwords. The intake runner is 217cc.

Intake Exhaust

.200 134.4 99.6
.300 185 134.1
.400 232.6 169.7
.500 263.4 195.8
.600 277.3 201
.700 288.6 209

I'm having some more work done on them now as I have my engine out for freshening.

 

How many miles before freshening?? again??

 

13,000 miles on the engine. None of which were easy.

So far I've just removed the heads, and everything looks fine.

 

My head porter says AFR has a "HAPPY" flow bench,because they won't flow advertised on his bench. He has done a ton of them too.

 

Wow, my hand ported 193cc runner AFR's went as follows:
Intake Flow #'s:
.100 - 68
.200 - 147
.300 - 197
.400 - 236
.500 - 265
.600 - 276

Exhaust Flow #'s (No pipe):
.100 - 58
.200 - 106
.300 - 148
.400 - 178
.500 - 198
.600 - 210

Can't wait to see what that beast runs with some REAL heads on that thing!

 

Taner were these "competition ported" AFR's that someone then went through by hand?