i'm looking to buy/install afr 185 heads http://www.summitracing.com/parts/AFR-1388/ what cam would go well with these heads....non roller block also can you get 1.7 roller rockers for these? scorpion? 3/8 or 7/16? current specs stock 84 stang engine(175 hp but rated with t5) holly 600cfm 4bbl with electric choke and vac secondaries switched serpentine setup to maverick 3 pully system mav 302 manifolds into 2in dual exhaust with no crossover. currently have stock 8in with 3.00 gears and stock c4/stall tire size is 25.7 245-45-17 looking to upgrade to ford 9in with either 3.25 gears or 3.40 gears along with trans-go shiftkit and coan 11in street performance 2800 stall perhaps hooker headers
get the 7/16s rocker studs. i just had a customers car with those heads on that had a 3/8s stud brake. i would call a few cam companys for a sugestion. how tall of a rear tire do you have? thats important to help decide what gear ratio you go with. if you end up crusing below the stall speed the conveter will generate alot of heat and cause transmissin failure.
Are you planning to race the car? For just street/strip i'd go with the 165 versions, plenty to get you 400HP. Why do you want 1.7 rockers? What cam are you running? You can get roller rockers, just be sure to get stud type in whatever size studs you have. Also if your getting 2.02/1.90 valves be sure to clay the engine!
I just want a nice street engine that i may take to the 1/4mi or auto-x every once in a while.. I was looking at the 165s but came accross an article about the afr 165 vs afr 185 and with same engine combo the 185s outperformed the 165...though I dont think they compared them to 2900 rpms or under.. I'd like to do 12s n/a or atleeast low 13s by the way, never heard the term clay the engine..
k, guess that means I may not have the needed valve to piston clearence.. so I guess the afr 165 seem like they may be the better choice as of right now...stock 84 stang cam. not sure what I should run with these heads any recommendations?
I'd try to go and ask on a fox body stang forum. There's bound to be guys on there running a 84 engine. Without the info on the pistons it's hard to give advice on a cam/valve size. Also your engine will be flat tappet. So be sure you get springs that match the cam. Running springs made for a roller cam will wipe out the lobes on a flat tappet engine. A while back that's exactly what happened to a guy running AFRs on an older engine.
My cousin has a 289 (292) with AFR 165's, 1.7RR and a Comp Cams 270H. in a 3300lb w/driver Fairlane it ran a 7.96 in the 1/8th. Actually lifted the driver's tire a time or two. Get rid of the slicks and 4000rpm stall and she's downright streetable. Even the 165's will pull to around 7000 with the 270H. Unless you are racing, I'd stick with the 165's and a fairly mild camshaft, under 280* advertised duration. The 84 doesn't have valve reliefs, right? I'd drop the 1.7's. Even a 268H with the 165's would give you some serious torque and should be right at 300 rwhp as long as the rest of the setup is up to it and you shouldn't have any piston to valve clearance issues.
AFR185 valves are not located in the same place as on stock heads so with stock pistons you would probably need to flycut reliefs, depending on cam duration.
ok, so afr 165 heads, perhaps thre 270 or something around 280 duration and under... you saying dont go with 1.7s and go for 1.6 rockers then? definatly going to get an 11inch coan converter with 2800 stall might keep my 3.00 gears/8inch...but may step up to a 3.25 or 3.40 if and when I upgrade to a 9inch
Ford cams are rated with 1.6 rockers. So when you swap to 1.7 it changes the lift. With stock pistons its really difficult and the general rule is to stay under .500 lift.
