Anybody know the cc of an 85 351W HO head? Anybody have a flow file for dyno?

 

[updated:LAST EDITED ON 08-Aug-02 AT 03:50 PM (EST)]Found the cc. 67.5 - 70.5. The valves are kind of small on these heads. 1.78 in/1.46 ex. Would these head be worth using in a performance setup? 400+ on hp and torque. Oh the number is E5AE.

 

you would have to do work to them to get that hp. I would look into Aftermarkets. Some good ones are the World Product Roush 200. They have a 64cc combustion chamber, 200cc intake, 2.02 and 1.60 valves. They are iron and run about $800 a pair. Not to bad. Only problem with stock is you would need to mill them and put bigger valves for that much power.

 

Can I use flat top pistons with those?

 

You'll have a hard time getting any more than 325hp with stock heads. Even stock GT-40P heads flow better than those. Definitely go with aftermarket if you want to get 400hp or more. www.silvolite.com has a nice compression calculator you can use.