Ported Ford 289 heads with port energy discussion

[mag2555]

Raising both roof sides will for sure cut back on whatetever level of swirl you may have been going for !
So once again only the dyno will tell you once you get the motor into the rpm band you have designed it have its magic in .

It really makes you wish you had only a 2 cylinder mule version of whatever motor your porting Heads for to slap on the dyno, far less time and effort would be spent on getting answers when there's 12 less port to do by hand or even CNC!

[Carnut1]

I decided to raise the roof as much as practical on both sides of the bowl and not worry about swirl due to lack of csa. Flowbench states still plenty swirl maybe more than needed for a high rpm 289. Thanks, Charlie

[mag2555]

I have not been following this thread much Charlie due to time issues these days, so let me ask , have your flow test been done with a spark plug in place , or just clay or whatever?

[user-9274568]

Threads like this get me thinking. I've been looking for one of these for some time now. I actually just wanted an add on unit.

I'm the proud owner of this! Only 5 stand alone units were made. I know were 3/5 are!

Hope I can learn something with it.

[Carnut1]

I have not been following this thread much Charlie due to time issues these days, so let me ask , have your flow test been done with a spark plug in place , or just clay or whatever?

I actually have an old o2 sensor in the plug boss. I don't have a single large plug left after the move. Thanks, Charlie

[Carnut1]

Threads like this get me thinking. I've been looking for one of these for some time now. I actually just wanted an add on unit.

I'm the proud owner of this! Only 5 stand alone units were made. I know were 3/5 are!

Hope I can learn something with it.

Looks like a Mondello tumble meter? If it is give D.V. a call to set it up right. I am sure he will be a wealth of knowledge on it. Him and I have discussed that very machine a while ago. Thank, Charlie

[Carnut1]

With wet flow, nice setup.

[Erland Cox]

Are these Ford heads going to be tested on an engine?

Erland

[Carnut1]

They will be used to stress test a 8000 rpm 289 +.030" engine. Not 100% sure if they will be dialed in on a dyno first. Thanks, Charlie

[Erland Cox]

Are you going to compare the to another set of ported heads?

Erland

[Carnut1]

These are so the good heads don't get used up in the stress testing!

[Carnut1]

Have you been using an ultrasonic thickness tester to check casting thickness in bowl and shortside? I think that you are really pushing the limit , or more likely, have surpassed it. 289 heads flow the best right as you hit water. My shop cnc ports MANY sets of road race 289 and 351w castings per year and can say with alot of confidence that half of the castings would either outright hit water or spring a leak the first race with that bowl shape and size. From substantial first hand experiance i can say that you can't get a 289 bowl big enough and are limited by the inconsistent casting thickness.

Bill, I would love to know what you can get out of these castings. Not much info of the internet of what can be had with some work. Thanks, Charlie

[BILL-C]

The "safe" program only flows 220 ish cfm with 1.87 intake valve. If the customer has a bigger budget and promises to not hold me responsible for future leaks, we"ll hand port a little more.We use the sonic checker often on these jobs.

[Carnut1]

Thanks, Bill. Any pictures? I am done r.&d. on these but would love to see how others prep these. Thanks, Charlie

[mag2555]

The sunken plug on these Heads has always bothered me to put it mildly!
With much higher flow levels now taking place and more to the point , higher port velocities. I wonder what the max timing advance needs of the motor will change to?