Snake
Mopar Nut
May the best 360 win,you guys are building what sounds like a good street pounder.Good luck boys.And remember lets go raceing boys.
I would build a zero deck stroker and use magnum heads.Make sure quench is set correctly with bowl porting and a gasket match and your looking at an easy 450 h.p on a very streetable motor (tons of torque and hi velocity heads) with built in detonation protection due to the quench.Strokers seem to "like" hi velocity heads which quickly fill the cylinders,as the increased stroke picks up piston speed. With the faster moving piston comes a need for speedy air fuel delivery,so I would also recommend a cam with fast ramps. Contact Hughs engines and have a look at thier cams.
Once I decide on the valve train and have the heads cut for bigger valves my plans are to send out the J heads to have them ported. Hopefully by one of the members here that knows his stuff. My plans are to build this for under $4K
Thats very doable with carefull parts selection and shopping.
Once I decide on the valve train and have the heads cut for bigger valves my plans are to send out the J heads to have them ported. Hopefully by one of the members here that knows his stuff. My plans are to build this for under $4K
Honest, even free, those J heads will cost you a ton to have ported and refurbed. I did my own porting and it cost me close to $700 for valve job, surfacing, hardened seats, new valves, springs, etc... A decent port job will run you 600-900 and then you are talking ede head money which are better OOTB than most any ported early factory iron head.
If you don't want to run Aluminum, look into the new heads available, EQ's RHs, etc... You'll be miles ahead with much less invested.
Ugh! Don't tell me that. Thanks crackedback I will look into it.
Thanks for returning my Pm 1wild&crazyguy and crackedback
So are the Rhs/indy LA version the best bang for the buck right out of the box? If I could save some scratch by not having to port the J's that would be great. I know that there are many variables that go into making power, but if I can get 450hp out of the box then I will go with them. If that is the case then I will call my engine guy and tell him to hold off on the heads. Keep in mind that I don't plan on spinning this thing to 6,500 rpm or do I want over 500 hp. Just a good streetable motor that makes great torque.
magnum heads are garbage for anything other than slightly warmed up or stock AND don't flow over 250's cfm and are a liability when it comes to durability/longevity.JMO/experience
It cost me $800 ish for a full performance rebuild on the heads, I did my own porting.
Not everyone wants to do it this way and that is totally cool, cause we are all individuals here.
What a load of garbage...
yep, factory magnum heads sure are garbage...rofilel:
And so is you're perception of my post.:read2:
Hard to argue with fact.
I'll put my J's on the dyno against your mag'ems any day.8)
sure...And you'll be cryin until about 5000 rpm.
Yeah! I got a set of 351 4bbl heads that will outflow both of you guys, can I play??
ROFLMAO!
I still am hanging on to my J, X, 308 heads because of the shafts, I don't care about numbers when they will all do the same thing, it's just hard to beat a shaft.
Combustion chamber can be fixed with pistons, if you like the clsoed chamber idea vs open chamber.
Ha.. yeah, I know...
I dare post my opinion and experience and well...the rest is above. ha ha
Hey you can fiddle and make a lot of things ''work'' but we're talking about a 408-410 stroker, and mag heads are a close relative of 318 port volumes
:cheers:Like I said we're all individuals here so just have fun and do you're own thing:cheers:
yep, 351 4v heads flow ridiculous amounts on the intake side
Yep,just cant get it out. Typical Ford.
This will give you an idea what a ported stock head can do:
http://www.hughesengines.com/TechArticles/6408416strokerdynotests.php
I would get the bottom up line honed, ARP main studs, balanced by a good local shop, get the crank and rods looked over and corrected if need be, pistons inspected, and zero deck the block. Then if the budget is tight use those stock iron heads with a good valve job, bowl blending, and gasket matched. The only problem is when those stock heads need new valves, valve springs, new guides, and retainers and locks. Now you are starting to approach the cost of new heads. Or just go with Eddy heads to start with, get the shop to go over the valve job, check out valve guide clearance, and get them touched up a little. My local shop quoted me $250 to prep a pair of Eddy heads like described above. Then later you can pull the heads and have them ported.
I run Stage 2 ported Edelbrocks by Shady Dell Speed, retrofit roller cam, MP bronze drive gear, Comp Cams Pro Magnum roller rockers, Hughes hold down kit, upgraded valve springs, 10 degree retainers and lock, and that all added up to around $4,000 which was significantly more then the short block costs. So unless you have a big budget build a good short block and that will leave you the option to upgrade the top end later.
This will give you an idea what a ported stock head can do:
http://www.hughesengines.com/TechArticles/6408416strokerdynotests.php
I would get the bottom up line honed, ARP main studs, balanced by a good local shop, get the crank and rods looked over and corrected if need be, pistons inspected, and zero deck the block. Then if the budget is tight use those stock iron heads with a good valve job, bowl blending, and gasket matched. The only problem is when those stock heads need new valves, valve springs, new guides, and retainers and locks. Now you are starting to approach the cost of new heads. Or just go with Eddy heads to start with, get the shop to go over the valve job, check out valve guide clearance, and get them touched up a little. My local shop quoted me $250 to prep a pair of Eddy heads like described above. Then later you can pull the heads and have them ported.
I run Stage 2 ported Edelbrocks by Shady Dell Speed, retrofit roller cam, MP bronze drive gear, Comp Cams Pro Magnum roller rockers, Hughes hold down kit, upgraded valve springs, 10 degree retainers and lock, and that all added up to around $4,000 which was significantly more then the short block costs. So unless you have a big budget build a good short block and that will leave you the option to upgrade the top end later.