OK I'm going to build a motor in March, to make it bulletproof and allow more boost, who makes aftermarket DOHC Cobra heads that are worth a crap? I want a 550 RWHP motor but it'll to drive like aunt Susans Buick when under normal driving conditions
aftermarket heads
- Thread starter BigMerc
- Start date
The stock heads will be fine.
If you have a supercharged checkbook then the FR500 heads are probably the top in heads. I'm looking at them after I have done everything possable to the stock ones when the TT setup gets on mine.:beer: :beer:
Well I'm in for a good set, are these out of the crate and ready to go? or do i need some work done on them, what are we talkin 2 grand? As for the money I have so much in the car now I can never sell it so i might as well go all out, I'm budgeting 10-12K for the motor and install. What can you tell me about the FR500 heads, are they streetable? I want that elusive setting of everyday driver/AC/quiet ride and then 550 HP on tap rear wheels to go when i want it.
This should help you out. Your stock heads are already nearly as good as the FR500's. The price difference for the power is definatly not worth it. Just p+p your stock ones and you'll be very happy. This motor is not like the stock 5.0, you won't just bolt on 50hp with nothing but heads.
http://www.modularfords.com/forums/showthread.php?threadid=3050
http://www.modularfords.com/forums/showthread.php?threadid=3050
When I get my shop established and on it's feet I'm going to look into developing modular heads. High on the list will be a dohc for the v10.
Navigator heads will bolt up. I know the bore spacing and bolt pattern is the same...intake ports are MUCH! bigger though to the point that I doubt any 4.6 dohc intakes would work...exhaust port however is inferior to 03 cobra, which i believe is the same as 03 aviator,03 mach1,and 03 maurader...seriously the heads you have are BADASS!!
Seems to me horsepower to be had in GOOBS would be forged 8.3 to 1 pistons on forged rods w/cobra crank....plus some forced induction equals immediate overwhelming low end and midrange torque......time for new rear tires!
Seems to me horsepower to be had in GOOBS would be forged 8.3 to 1 pistons on forged rods w/cobra crank....plus some forced induction equals immediate overwhelming low end and midrange torque......time for new rear tires!
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Why not look into what it would take to put a 32v navi motor w/blower and forged pistons and rods in there.....It would just be an iron block(budget) version of the new Ford GT engine....talk about torque, that big ole Merc would run high 10s if you could keep a trans together long enough...
Fun to dream isn't it?
Fun to dream isn't it?
sohowcome
Captain Obvious
I think you would be ok to port and polish what you have, that will make the flow much nicer and set yourself up well for a supercharger, IMHO of course.
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