Do you think I can fit either one of these heads on a 357w with a set of speed pro hypeuretic pistons and how hard is it to fly cut pistons with engine built already
Both will fit. What size cam do you have? I assume the pistons have small reliefs and the heads have large valves. Fly cutting pistons in the engine is kind of a pain in the ass and very time consuming. Possibly look for heads with smaller valves. With hyper pistons I assume you're not building a radical combination anyway. Either way p/v clearance should be checked before you try to run the motor and that will tell you whether you need to fly cut.
And to add to this, a lot of times with TFS twisted wedge heads you can use a mild but nice cam without fly cutting because those heads have a lot of free drop, meaning the valve opens a much greater amount before breaking the plane of the head deck and coming anywhere near the piston. Great heads too.
I have a 542 lift cam in it right now not to big but I want to build a 408 stroker next year and I want to buy heads for it so I will have them already just swap over to my new short block
With TW heads you will probably only need to worry about fly cutting for the intake valve. That being said, if I were in your exact situation I would buy the biggest baddest set of twisted wedge heads I could afford (to feed that 408). Check p/v clearance on the 357 and fly cut pistons if needed. The .542 lift of your cam may be close but the duration is critical. You may even get away without fly cutting by running the thickest head gasket you can find until you build the 408.
What size combustion chamber would you go with, 58cc's or the bigger one which I think is 68/72cc's. The bigger chamber is really made for blown applications where you are shooting for a lower compression ratio. First, both heads should fit your (357w?) and as for fly cutting the pistons with them in the block...................I've only done this on Ford Flathead V8's.................and it's not easy to do..............plus you get a lot of shavings that go everywhere..................I wouldn't do it with the pistons already assembled in the motor....IMHO I'd check your AFR heads to see what kind of clearance you have. Take the heads............assuming you know what the crush depth of the head gasket you are going to use, put the heads on the block and tighten them done finger tight...............Of course use some modeling clay and put it in the valve reliefs (you will need to have the rocker arms/push rods assembled.............then turn the motor over by hand..........if you feel a lot of resistance............stop, because you could be pushing the valve directly into the piston............if not continue until you make a complete 360 rotation...............take the heads off and measure the modeling clay. Be sure to add whatever the crush depth of the head gasket should be and you have the piston to valve clearance. I'd shoot for .040 to .050 on the intake and around .080 on the exhaust. If the clearance is more you are also good, but if it is less it's time to get the old fly cutter out.
I fly cut the pistons for my falcon motor (306) in the block. That engine has a .650 lift solid roller cam and I only needed a very shallow relief on the intake side only. You will most likely be ok with the .540 lift cam.
The pistons have pretty big reliefs in them I don't know about clearing that 2.08 intake valve on AFR victor Jr got a 2.05 I believe but not much smaller than AFR My compression ratio is 9 17 to 1 with 63cc heads so the 58cc should help bump it up some
2.08's are what I have on my 408. I'm also running 1.65 exhaust with 62cc chambers................these are very old TF-R heads but helped pull almost 650HP on the dyno. I would think that since you have a pretty mild lift/duration the reliefs should clear the 2.08's, but if you buy the heads make sure to clay them to make sure.
Seems like I need to go with trick flow heads every post so far is about there heads will they work with inline pistons my plan is to take 357 out maverick next year slap the performer heads I have on it and put it in my 1970 mustang fastback for my wife
Before you choose any head, take a look at the numbers............what the motor is going to used for, strip only, street mostly and a few trips to the strip............................. http://www.w8ji.com/small_block_ford_heads.htm And I agree with John, wait to purchase the heads until you have the motor going together, don't try and use them on a motor not really designed for using the full capacity of the new heads..............IMHO
I probably will leave it alone but my previous car was a fox body with 393 in it and I just miss the power it had I just think the afr 205s would wake this 357w up but it needs a set of gears so I may just do that instead install a locker to
Gears and a locker will be about a 1000 dollars cheaper than 205s,but for the money those 205s are hard to beat.I`m not going to take anything away from Trick Flow but their comparable hd you have to port a little to get it to flow as well.If you keep looking online at diff. sites you`ll see many articles on 205s sitting on 408s pushing 600HP.
Just depends on what the motor is going to be used for, personally it was just a race only motor most of the high HP Windsors/Clevelands are using Roush/Yates or Kasse heads and are making 750HP+/w single carb. Now with that said if you are using less than .600 lift on the cam AFR would be a better choice but if it's above .700...............I'd look in another direction...........................................IMHO Just for here is a little motor under 400cubic inches that is making some serious HP
