Post Your Flow Numbers - Buick Iron Heads

Wanted to start a thread on flow numbers to stock 455 Iron Heads. I've been curious to what these heads are capable of and what amount of work goes into them. If anyone has some stock head flow numbers please post them. Post pics if you have them. I'll start it off.

Here is a set I have recently done.
Casting #860 '73 Stage One valves w/ back cut, valves unshrouded, bowl ported, guide tear dropped, pushrod pinch or "choke point" widened, SSR widened, ports not raised or epoxied.

Flowed on a Saenz S-600 using a Buick Slider Plate w/ 4.310 bore and clay.

.100 - 73.43
.150 - 118.69
.200 - 159.65
.250 - 197.95
.300 - 224.55
.350 - 249.87
.400 - 271.92
.450 - 282.14
.500 - 284.19
.550 - 282.14
.600 - 282.14

 

On my '69 cali GS:laugh:
Geez,your pics are twice the size of my monitorou:

 

Those are good numbers for intake. I only have 264 at .550 (28 in.). What's the exhaust numbers?

 

That is nice looking work with great #'s .When you flowed them on the 4.310 bore did you center the intake to compensate for the smaller bore?
Jamie

 

Sorry for the image size.

I will have some exhaust numbers shortly. Not a whole lot done to the exhaust side as of yet. Still doing some experimenting.:idea2:

I had a custom slider plate made from Brzezinski with this bore size so the bore location is correct.

Let's see some more!!!

 

Hard to see mine as they are on the car! I sent you a PM. Beautiful work and impressive numbers !

 

A basic 3 angle cutter was used with a bowl cut and bowl blend, nothing fancy. Here are the flow numbers without a pipe.

.100 - 66.88
.150 - 91.52
.200 - 114.88
.250 - 132.91
.300 - 149.19
.350 - 159.62
.400 - 170.04
.450 - 179.81
.500 - 186.98
.550 - 188.94
.600 - 192.84

 

Hoping to see more responses. Don't be shy, just wanting to prove the performance of Stock Iron heads and would like others input of similar experiences. Let's see some more!:TU:

 

I have been researching this ( ported iron heads)....anybody care to add anything else? Is it possible to get 290 int / 215 exh with the iron heads?

Regards,

455nGLIDE

 

I too would like a nice pic of a ported ex. port. With bowl work and a blended and widened SS my 860's flow 180@.500. Guide boss/runner untouched. Here's the flow #s.
.100"....57
.200"...106
.300"...143
.400"...165
.450"...173
.500"...180

Here are the two photobucket pics no longer valid from the first post.
Ray

 

Mine flowed 285 cfm at .550 intake and 202 cfm at .550 exhaust. They were ported by PAE almost 10 years ago. The car ran a best of 11.18 @122 so far with them on ET Streets with full 3" exhaust.

Ken

 

Gessler Stage 1 Level III cast iron CFM@28":

Valve Lift: Intake / Exhaust

.100" 67 / 58
.200" 140 / 119
.300" 197 / 150
.400" 240 / 175
.500" 246 / 185
.600" 247 / 189

 

Here's some AM&P head flow #s. These#'s are with 73 860's, only the SS done and the bowls. Stg1 valves.

Never satisfied, on the intakes I opened the pushrod pinch point, opened the ports up and streamlined the guides. Presently lowering the guides .300". I'll post #s when I have them flowed......Ray

LIFT....IN...EX
.100...69...57
.200..145.106
.300..205.143
.400..244.165
.450..247.173
.500..244.180

 

Level 3 #1231786 iron castings Street Perf Heads
Flowed @ 28"
w/o header tube
Gessler Head Porting

lift .100 .200 .300 .400 .500 .550
IN. .69 .138 .202 .244 .254 .259
EX. .57 .109 .147 .171 .184 .187

I/E 83% 79% 73% 70% 72% 72%

Gasket matched intake with no runner work ALL gains @ the Pocket & Bowl areas also Exhust crossover passages filled.

Mark Campbell

 

I have big port 430 heads with stock valves and port work.
int exh
100 76 53
200 156 106
300 224 139
400 264 166
500 274 177
600 269 181

 

I just got a set of iron heads from P.A.E. that flow as follows:

INT / EXH
.100 - 78 58
.200 - 143 113
.300 - 213 164
.400 - 262 190
.500 - 283 207
.550 - 289 210
.600 - 297 212

NOTE: Exhaust numbers are strait off the heads.

Regards,

455NGLIDE

 

Sorry for posting off subject, I've done some port work on my iron heads and since where I live there's no flow bench nor any professional porter I want to ask you (board members) for you opinion on my work.
I took a couple of pictures before cleaning the heads but I think you can get the idea of how good or bad the work is.
Thank you.
Nadim

 

Level -3 Street Peformance heads by Gessler. SMALL VALVES for my 400ci.


I don't have any pics since I haven't seen them yet. Working overseas and my 110 lb girl can't move them. Very anxcious to get home in Dec to get a look!

 

Is it possible to get everyone to post the valave sizes used? Just so we're compairing apricots to apricots.

Danke. p

 

I just got a set of iron heads from P.A.E. that flow as follows:

INT / EXH
.100 - 78 58
.200 - 143 113
.300 - 213 164
.400 - 262 190
.500 - 283 207
.550 - 289 210
.600 - 297 212

NOTE: Exhaust numbers are strait off the heads.

Regards,

455NGLIDE
<!-- / message --><!-- sig -->__________________
1969 Skylark / GS Tribute project

@28" and equipped with 2.15 intake / 1.75 exhaust on mine and I got 'em for $900.00. I was gonna go Edelbrock but I could not pass this up.

Regards,

455NGLIDE