289 Hi-po heads - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 56 (permalink) Old 10-29-2012, 07:47 AM Thread Starter
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Re: 289 Hi-po heads

Since I'm into these heads for only a few hundred I might put the larger 351 windsor valves in, that should utilize the port job better.
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post #17 of 56 (permalink) Old 10-30-2012, 12:17 PM
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Re: 289 Hi-po heads

I run 1.94/1.60 valves but these are after market heads. I've been trying now for about 4 months to get these things cleaned up and to the machine shop for rebuild.


You can see they almost touch and this is a 58 cc chamber head. Spark plug angles are also more to the exhaust which is supposed to help. I had to clearance some of my header flanges for them to fit. I have read that 1.84/1.54's will work but you should mic the heads to see for sure.

1965 289 mustang fastback

Last edited by Hottarod; 10-30-2012 at 12:20 PM.
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post #18 of 56 (permalink) Old 10-30-2012, 01:15 PM
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Re: 289 Hi-po heads

I have tried actually spent months of flow testing small port SBF heads before finding better flow with the 351 DOOE size valves. The small chamber heads shroud the vales too much also. The 1.94 / 1.6
valves work best in the larger port heads like the DOOEs and GT40s.

In the case of the P heads I believe the spark plug is aimed a bit to much towards the exhaust valve which causes it to be spark limited. As most cant run much timing with them.

As for the OP his heads flow well concidering the intake he is planning on upping the valve size wouldnt do all that much. I dont realy know how much cam SBFTECh MIGHT have talked him into.
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post #19 of 56 (permalink) Old 10-30-2012, 01:55 PM
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Re: 289 Hi-po heads

I'd dump them... They look to have been worked over quite enough, and the brass and or epoxy inside probably means that somebody did a boo-boo into a water jacket maybe....
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post #20 of 56 (permalink) Old 10-30-2012, 03:30 PM Thread Starter
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Re: 289 Hi-po heads

FE, you think they would have done a boo-boo in every pocket? I could see one or maybe two but not all of them. I'm having a shop check them out and see what they think. If your right then yeah I'll junk them fast!
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post #21 of 56 (permalink) Old 10-30-2012, 03:40 PM
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Re: 289 Hi-po heads

Sometimes there is core shift. Also seems strange on 2 heads.
Remember doing port work on some rare big oval port chevy heads. One worked out fine. The other seemed wierd / different. Just touched a spot not any real pressure and the bur broke through. I thank God I didnt end up selling them.
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post #22 of 56 (permalink) Old 10-30-2012, 04:28 PM Thread Starter
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Re: 289 Hi-po heads

I'm having the shop that did work tell me what's going on but who I talked to first said that's an old SS class trick to help the flow, this guy wants me to call back tomorrow to talk to the guy that did them. I'll let you guys know what's up.
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post #23 of 56 (permalink) Old 10-30-2012, 06:08 PM
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Re: 289 Hi-po heads

Cool, so it IS epoxy or brass put there to ease flow around the curve maybe?
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post #24 of 56 (permalink) Old 10-31-2012, 12:42 PM Thread Starter
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Re: 289 Hi-po heads

I just got done taling to the shop tech that did the job and he said to make the heads flow better he smoothed out the floors on the exhaust with braze and then ported them. He told me I'd be surprized how much these stock casting shift.....to get the flow numbers they wanted he had to do the extra work. Other wise he said they're good for the street but he did suggest leaving the stock valves in for better low in torque. To get my 66 moving better that's what it needs for sure.
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post #25 of 56 (permalink) Old 10-31-2012, 02:40 PM
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Re: 289 Hi-po heads

I would just keep the small valves also for what your doing. Installing larger ones could hurt the flow without other port work and flow testing. Without flow testing and work they might pick up 7 CFM not realy worth it.
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post #26 of 56 (permalink) Old 10-31-2012, 04:50 PM Thread Starter
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Re: 289 Hi-po heads

with these heads and my Ford aluminum dual plane high rise and headers of course I was planning on having around 10:1 compression and a 625 holley. I'm also wanting 3:25 gears in the rear and a new C4 and stall converter depending on what cam I get.

I still want to be able to drive her on the highway and get better then 12 mpg if possible. I've been looking at cams till I can't see straight and the more I look the more I get confused. If I want to keep my hp around 280-300 then I'm thinking a mild cam would work fine...maybe?

I want some low to mid range stump pullin torque cam that'll have a nice sound too. I know some cams can be aggressive and wear out a valve train fast, I don't want that. If I have to have a custom grind then I'll go that way for sure.

Last edited by RickRacer; 10-31-2012 at 04:53 PM.
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post #27 of 56 (permalink) Old 10-31-2012, 05:52 PM
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Re: 289 Hi-po heads

Your intake is a eddelbrok RPM badged a Ford or similar. It will flow about 170 CFM. At what lift point do the heads flow 170?
Another point if the good port bad port flows are averaged closer to 160/165 CFM.
A cam lift for a good power curve would be one that lifts the valve to that point could go a bit more like .015 or so. Around that point the power curve starts to moove upward in the RPM. As it moves upward lowend and midrange begins to suffer depending on how radical the cam is. This mabe valuable in some forms of street, strip.

Duration @ at .050 Moves the power band up or down even if the lift is kept the same.

A higher stall can lower economy soo best kept stock if possible.

Info also needed is your tire diameter and max cruse speed. Usualy I pick about 80 maxx and figure RPMs required to run speeds from 50 to 80 in 10MPH steps.
Did you post yor head flow data here?

Have you given any thoughts to installing a AOD? I use one its been modded a bit and has a aftermarket valve body that has an electric OD shut off. This could be used wit ha bit lower gear.
In my grand marquis I could usally do 27 to 32.9 highway and 22ish intown with 3.55 gears.
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post #28 of 56 (permalink) Old 11-01-2012, 04:57 AM Thread Starter
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Re: 289 Hi-po heads

Hiya Turbo, I've considered the AOD but I don't know much about them. I've heard they can be tricky. My max cruise speed is 70 @ 2600 or 2700 rpm and the tire diameter is 28". I do have tall 15's on back right now and that's effected the speedo by 5 mph. It has 3:00 gears too.

Flow Specs,

Intake:

Lift Flow
200 127
300 172
400 191
500 208
600 213

Exhaust:

Lift Flow
200 100
300 132
400 160
500 178
600 182

Hope those come across right and help

Last edited by RickRacer; 11-01-2012 at 05:58 PM.
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post #29 of 56 (permalink) Old 11-02-2012, 07:33 AM
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Re: 289 Hi-po heads

Need the part number for the intake your using just to make sure which one it is.

The only tricky thing about an AOD is the TV cable and its adjustment. Is adjustment isnt all that big of a deal. I run several and have had no issues. Currently use the Locar cable, Holly linkage adapter. Also converted to a B& M floor shift and aftermarket valve body with a solinoid that shuts on and off the OD. Dont know if you have a floor shift already.

Will look up some info later
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post #30 of 56 (permalink) Old 11-02-2012, 09:58 AM Thread Starter
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Re: 289 Hi-po heads

Hiya Turbo, Just to make it easier lets just call it an Edelbrock F4B since that intake and the original aluminum Ford dual plane high rise I've got are almost identical.

From what I've heard this intake flows around 2500-6500 rpm give or take a few hundred of course.
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