Ford Muscle Cars Tech Forum banner

1 - 20 of 31 Posts

·
Registered
Joined
·
63 Posts
Discussion Starter #1

·
Registered
Joined
·
138 Posts
WHOA! Dude, what do you charge to do head work? lol that looks awsome!
 

·
Registered
Joined
·
63 Posts
Discussion Starter #6
Test pressure 28" of H2O
Test bore 4.030
Intake valve job is for a 1.940 intake valve


Intake

.200 136
.300 191
.400 216
.500 226
.600 229
.700 229
.800 229
 

·
Registered
Joined
·
1,477 Posts
Test pressure 28" of H2O
Test bore 4.030
Intake valve job is for a 1.940 intake valve


Intake

.200 136
.300 191
.400 216
.500 226
.600 229
.700 229
.800 229
Those numbers just reinforce the nice looking job you did. Flow comes up fast at .3 and .4...that's great. Are you going to use them on a 289?

Have you cc'd the ports? How about exhaust flow?
 

·
Registered
Joined
·
63 Posts
Discussion Starter #8 (Edited)
Intake runner volume is right at 160cc + or - 1 to 2 cc. I do have some exhaust flow numbers, but I'm actually still working on the port. I'm not going to give anything out until I'm satisfied with it.
 

·
Registered
Joined
·
63 Posts
Discussion Starter #11
I hate to tell you this but your comparing apples to oranges. Trying to compare a set of AFR heads to a stock casting is like comparing a mustang to a ferrari. The limiting factor is the casting. From the factory, Ford is only concerned that the engine runs, performs as advertised, and there are no problems. In the aftermarket, manufacturers are taking into consideration that their product is going to modified, and used the way they intend it to be used. To answer your question about performance, it really depends on the entire engine combination. On a well prepared super stock setup, where rules dictate that you have to run a factory casting, I don't see why a stock casting couldn't make 500hp or more. However, the problem you run into is in most cases these engines are stock displacement, and in order to generate that kind of power your going to have to turn a lot higher rpm.
 

·
Registered
Joined
·
63 Posts
Discussion Starter #13
I'll tell you right now that you'll be disappointed with the way they will perform, compared to your AFR185s. It would be different if your were coming from a set of bone stock cast heads, because chances are that you would notice a difference. But if you want to try it go for it.
 

·
Registered
Joined
·
1,477 Posts
160cc...that's what my DOOE 351w heads measure after I ported them. 1.94 valves too. My exhaust ports are 60cc and they use 1.6 valves.

From your profile on Facebook, it looks like you are currently working at a shop that does porting.
 

·
Registered
Joined
·
63 Posts
Discussion Starter #15
Yes I do work in an engine shop, and all the work we do revolves around cylinder heads. We don't do much for the public anymore, our primary focus is the manufacturers.
 

·
Registered
Joined
·
63 Posts
Discussion Starter #16
Test pressure 28" of H2O
Test bore 4.030
Exhaust valve job is for a 1.550 exhaust valve


Exhaust

.200 95
.300 123
.400 142
.500 151
.600 156
.700 156
.800 156
 

·
Registered
Joined
·
152 Posts
Man I know this is an old post but those pics are NICE! Wish I had that tallent lol
 

·
Premium Member
Joined
·
1,025 Posts
Hiya Blue65, After all the years I've been on this site I've never checked out this forum.....my loss! Anyway, great looking port work!

If I read your post right those heads are super stock? Tell me if these 289 Hi-po heads I got are ported any good then, your numbers are great and you said you have bigger valves in them so that helped even more.

My hi-po heads have been ported but have the stock size valves in them still and they flow numbers as follows:

Intake:
Lift Flow
200 127
300 172
400 191
500 208.6
600 213.3
700 217

Exhaust:
Lift Flow
200 100
300 132.5
400 160
500 178
600 182.5
700 183

These heads do have the screw in studs and spring saddle or whatever you call it and new valve guides and valves and valve job. I got these heads from a SS racer who ran 289's all the time and ran high RPM's to make the HP. I plan on using these heads on my 289 for a mild build say around 280-300 hp and wonder if bigger valves would be worth it or not. I might be able to port them more myself but how much does it cost for bigger valves anyway?
 

·
Registered
Joined
·
674 Posts
I have found over years of porting the factory size valves used in the old 351W heads flow better in the smaller port 302 heads. The 1.9 and 1.6 valves do better in the DOOE, GT40 heads.
I also dont trust flow results that dont give .100 lift flow data. I have seen low lift flow rates take a dump for more flow at higher lift points. I like to try to increase flow at .100 lift and increase at each point from there.
Most factory SBF heads perty much tank out around .500 lift.

I perfer DOOE and GT 40 heads as close to a proper ratio to engine size and port volume. The 185 heads are a bit large for a 302 to me except for real high rpm use. Most use intake on 302s with these heads that realy step on the capability of the larger heads to get better drivability.
 
1 - 20 of 31 Posts
Top