anybody running AFR 185cc cylinder heads on a 289?

[calpolymustang]

I have a 289 that id like to hop up with heads. Im just not sure if i should go with the 165cc or 185cc . This is a 2900lb street driving car. Id like to know whos running 2.02 intakes on a 289, and what theyve found out from their experiance. It seems that the magazines like to dyno 5.0s but rarely a 289.

A 2400 stall would go in the c4 as well. I plan on getting strong springs and running comp cams 1.7 steel rocker arms. Eventually id like to go 331 or 347 with a roller cam, but that will be a long time from now.

 

[1965-Mustang]

I was wondering the same thing. I was thinking AFR 185 with 331 or without stroker. And I would get 185 for future. . .dreams.

 

[calpolymustang]

Trick Flow has a 170cc with 2.02 that also look promising. Anyone running these???

 

[Ronstang]

Just remember that with late model heads you will get lower compression than on a 302. My Shelby has 1.94 valves in it and it revs quick and strong for a 289 (it does have 11:1 CR though) but I really don't know about a 2.02 on a 289, seems like a bit much to me. You are porbably going to lose some low end torque on an engine that doesn't have much to begin with. I think it also would depend a lot on which intake/carb combo you are running and how low a gear the car would be running.

I would consider holding off on the heads until you can wrap a whole new larger engine around them, but that is only me. Maybe there are some people here with some experience with the late model heads on the early 289 engine.

 

[fastback brian]

I dont think you want the street heats or 185's for your combo. not that a 289 cant handle them just that your gonna need alot more converter and alot of cam to make good use of them. You'd be suprised how well the small/ big valve heads work with a 289. I eaisly made over 400hp with simple off the shelf basic parts on three differnt 289's with stock out the box windsor Jr's.

 

[fastcoupe68]

with a street 289 I would go with the 165s great little cyl heads for a great little motor.