Right on the Mark
Dedicated LVC Member
One big plus for C heads is 9 thread sparkplug holes in heads.
Supercharging 98 Mark VIII LSC
- Thread starter Teccmoney
- Start date
KStromberg
Dedicated LVC Member
Hmm. I thought that was only an SOHC PI engine issue with the Panthers. Plus, that whole "problem" that people make it out to be seems to me to be operator error with torque specs.
Right on the Mark
Dedicated LVC Member
To many plugs popping out to be operator error. Plus why would Ford change it to 9 threads if not needed? 9 thread head is big plus when boosting. If you pop a 4 thread while boosted its not a good thing to put steel inserts in. Only thing is 9 thread heads are 2004 and up. So they cost a bit more.
ford nut
Local nut case
Nice!
Teccmoney
Active LVC Member
Hmmmm I always thought b heads were better for boost and c heads were better for n/a. I wish I could afford some 2004 cobra heads. That would be nice. After doing some research I found this info on the cams I could pick up for cheap
FR500*(M-6550-T46) Cam specs:
intake adv dur 258° @.003, 212@.050 /.472 lift
exhaust adv dur 254° @.003, 208@.050 /.472 lift
109° center line
204/214 spec’d
seems like these should be fine with boost in the b heads. I might just buy them and hope for the best.
FR500*(M-6550-T46) Cam specs:
intake adv dur 258° @.003, 212@.050 /.472 lift
exhaust adv dur 254° @.003, 208@.050 /.472 lift
109° center line
204/214 spec’d
seems like these should be fine with boost in the b heads. I might just buy them and hope for the best.
Right on the Mark
Dedicated LVC Member
Hmmmm I always thought b heads were better for boost and c heads were better for n/a. I wish I could afford some 2004 cobra heads. That would be nice. After doing some research I found this info on the cams I could pick up for cheap
FR500*(M-6550-T46) Cam specs:
intake adv dur 258° @.003, 212@.050 /.472 lift
exhaust adv dur 254° @.003, 208@.050 /.472 lift
109° center line
204/214 spec’d
seems like these should be fine with boost in the b heads. I might just buy them and hope for the best.
B heads are better over 8K. C heads are better head. You can afford 2004 cobra head just buy them off an Aviator. NA SVT has said that FR500 cams have to much overlap for FI. You don't have to buy anything and hope for the best. Just google anything you want and info is out there.
Teccmoney
Active LVC Member
For sure. So I will look for 2004 c heads. What intake is the best to run on c heads that has oval shape.
Right on the Mark
Dedicated LVC Member
Post 72
Teccmoney
Active LVC Member
Damn your good
97MarkJA
Dedicated LVC Member
FR500 cams installed at factory spec do have too much overlap for boost however degreed properly they work great. You can also get them at a fraction of the cost of a aftermarket set.
Just remember, you are going to buy 4 or 32 of everything for the top end of that motor.
I never claimed to be the smartest guy on the forum but I do know that a little number x a big number is a big number every time!
Just remember, you are going to buy 4 or 32 of everything for the top end of that motor.
I never claimed to be the smartest guy on the forum but I do know that a little number x a big number is a big number every time!
Roadboss
Dedicated LVC Member
I have stock Maruader cams and heads, but I also run a KB unit so RPM's are not a big concern for boost.
Teccmoney
Active LVC Member
FR500 cams installed at factory spec do have too much overlap for boost however degreed properly they work great. You can also get them at a fraction of the cost of a aftermarket set.
Just remember, you are going to buy 4 or 32 of everything for the top end of that motor.
I never claimed to be the smartest guy on the forum but I do know that a little number x a big number is a big number every time!
That is why they are so tempting to buy because I could get them for cheap. Getting them degreed properly shouldn't be a problem but I will probably just do The cams Last and let the tuner decide what's best.
Teccmoney
Active LVC Member
All I need is the 1996-1998 cobra intake and fuel rails to run it right?
Right on the Mark
Dedicated LVC Member
You don't "NEED" anything to run it. Things that you "WANT" to run it.
Teccmoney
Active LVC Member
Lol I need to get my wording right. Okay I am trying to piece together this setup you mentioned. Would I run my mark viii exhaust cams with the 96-98 cobra intake cams? Thanks for the help.
Right on the Mark
Dedicated LVC Member
Yes mark 8 and cobra exh cams are the same. I'm not telling you how to build your engine. Just throwing stuff out there for you to ponder. If you switch to C heads you could just run the Mach1 lower and top hat. Alot of peeps think the Mach upper intake is ugly and that's why some like to put the cobra upper hat on. (with adapter plate) Plus I was just messing with you on the wording. LOL
Teccmoney
Active LVC Member
For sure. If I go c heads I will probably just run the mach 1 upper intake manifold. I need the help because I don't know how to build an engine lol. I'm just trying to stack all my parts and get everything done at once since I'm not doing the work myself. Paying for labor gets pricey but I always seem to get a better deal when i buy the parts myself.
Sapperfire
Dedicated LVC Member
Finding actual 96 Cobra cams would be the awesome. 96-98 has the same part#, but Ford revised them in 97, the 96 stock cam is a little more wild. You can buy cams for a 96, but it'll be the revised edition.. The only way to get the one I'm taking about, is to pull it from a 96 car
Right on the Mark
Dedicated LVC Member
I have never heard of this.
Teccmoney
Active LVC Member
I just found complete 98 cobra heads and an 98 cobra upper intake for $150. It's a couple hour drive. Score? I'm on a mission now lol.
97MarkJA
Dedicated LVC Member
If the heads are truly have the cobra cams in them and are in good shape ... That's a score.
Right on the Mark
Dedicated LVC Member
The cams alone go for 200-225 most of the time. Upper hats like 150ish. So 350-375 worth of stuff for 150 good deal. Just make sure the part #'s on cams are real cobra cams. People say mk8 heads are cobra heads all the time.
Teccmoney
Active LVC Member
The valve covers are grey. I'll pull them off and check part numbers. Thanks for the tip
Right on the Mark
Dedicated LVC Member
If he is including the Cobra VC's that's more money for you. People want those with the SVT badge on them. Also start looking for used ARP head studs. You can find these all the time. Also does your shortblock have an oil pump on it? If not start looking for a Mellings with billet gears in it. Even if it does check what pump is on there. If it does not have steel gears correct that.
Teccmoney
Active LVC Member
The block came with a 2003 cobra oil pump and oil cooler. Will that pump be adequate? My buddy is driving me to get the parts now