PI question block inquries

[D3VST8R96GT]

is there a pi swap alternative like buying heads better then the pi heads from a 99-04

is it basically the same swap?

also what is our block made out of ?????? been wondering for awhile is there a dif between cobra and gt blocks material

how much boost can the stock block handle?

 

[glittle75]

you can buy ported heads from a number of companies. as far as a completly different head, Trick flow is coming out with a new head. sometime or another. keep getting delayed on release time.

and the swap will be the same on any heads you get.

your GT block is made of Iron, Cobra blocks are aluminum. wiegh a little less. worth it to buy a lighter one if you can find one cheap. but i wouldn't buy a new one just for little wieght savings. price goes up alot for new pieces.

and the stock block can handle anything you can throw at it. the rotating assembly is the weak link. not like the 5.0's that crack over 400hp.

I don't think there is one single incident of a cracked block from to much boost, or power. all the companies that rate thier shortblocks for 1000hp or whatever ungodly number, are using a factory block, just a new one.

 

[blown98gt]

it's not about how much boost, stock internals will hold a max of 450 hp on a very very good tune.. others have over that but i wouldn't go over 400 on a stock block

 

[D3VST8R96GT]

thx guys im not building a hp monster i just dont wanna plan out just buying a forged rotating assembly in the future and then crack my block esp when i can wait a lil longer and get a badass motor im sure i cant blow up as easily

 

[blown98gt]

If you are going to build a block i'd recommend getting the 8 bolt cobra crank and using it.. maens you have to get the 8 bolt fly wheel but the crank is good up to like 800+ hp... stock cobra's with turbo setups are running 800+ hp on stock internals.

as far as PI heads vs ported NPI heads... the advantage of putting PI heads on a NPI block is the boost in compression.. although i ported my pi heads to hell and set my block of for boost (8.5:1 compression)

 

[GDTrumbo]

you can buy ported heads from a number of companies. as far as a completly different head, Trick flow is coming out with a new head. sometime or another. keep getting delayed on release time.

and the swap will be the same on any heads you get.

your GT block is made of Iron, Cobra blocks are aluminum. wiegh a little less. worth it to buy a lighter one if you can find one cheap. but i wouldn't buy a new one just for little wieght savings. price goes up alot for new pieces.

and the stock block can handle anything you can throw at it. the rotating assembly is the weak link. not like the 5.0's that crack over 400hp.

I don't think there is one single incident of a cracked block from to much boost, or power. all the companies that rate thier shortblocks for 1000hp or whatever ungodly number, are using a factory block, just a new one.

Oops! The supercharged '03 & '04 Cobras went back to an iron block.

Just throwing that out there.

GT

 

[D3VST8R96GT]

ok i thought of a better way of wording my pi question

will aftermarket heads intended for a 99-04 gt work better then just throwing on stocker pi's ? by work better i mean performance wise and installation wise ....if so why dont ppl do that instead of stock pi's

 

[glittle75]

there are no 'aftermarket' heads for modular motors. just ported out stock ones.

trick flow is making some, but they have been 'coming out' for months now. i wouldn't hold my breath for them.

its not like a old 5.0 where TFS, AFR, and everyone else makes heads for them. Ford makes heads for modulars, other shops port them.

when you see a 1800 dollar set of 'stage 3' heads for a 2v, its a $300 set of stock PI heads, and a $1500 port job/valve job, etc.

 

[D3VST8R96GT]

thats what i though thx so much .....thats odd no one made after markets for em

 

[glittle75]

these ar "interference" engines. tolerances are really tight. no one makes them because of the cost of R&D, testing, and everything else. I think if the trick flows do ever come out, they will boost the market and we might see a couple other big names making heads. but the first company to do it has a big risk involved.

spending heaps of money to develope a head that could fail miserably, or R&D to find out that you cant improve on the stock design, and keep it priced for the average guy.

if the TFS heads are as good as advertised (and really, what is these days) then they stand to make alot of money on a head that can flow just as well as-cast, as heads that have been hogged-out in port work. then can be ported to 4v numbers.

but if its all just smoke and hype, and the TFS heads are 2k a set for a 5hp increase, they will lose everything because no one will buy.

 

[D3VST8R96GT]

yeah that makes sense ppl like you make this site what it is thx so much

 

[MustangChris]

is there a pi swap alternative like buying heads better then the pi heads from a 99-04

is it basically the same swap?

also what is our block made out of ?????? been wondering for awhile is there a dif between cobra and gt blocks material

how much boost can the stock block handle?

stock heads suck.
PI heads are nice for a 96-98 because it raises the compression ratio while still improving flow.
Ported and Polished PI heads are the best we have right now. You can get patriot heads, but their quality is, and always will be, in question. They offer some extream ports, but many people wont trust them (me included.)

Trick flow are coming out with 2v heads that are supposed to revolutionize the 4.6 2v world. They offer stage 3 heads for blower applications that STILL HAVE ROOM FOR PORTING. why this is important is because when your pressing for 801 HP instead of 800, a custom port might be in order, and the head shop will need some matieral to work with.

They relocated the spark plug closer to the center of the combustion chamber.

they relocated the exhaust valve for better "in-n-out" flow.

they have material on the gasket surfaces for decking purposes incase you want to raise compression.

they are compatable with both romeo and windsor valve covers.

the trick flow heads are God's gift to the SN95s.

 

[NERD]

thx guys im not building a hp monster i just dont wanna plan out just buying a forged rotating assembly in the future and then crack my block esp when i can wait a lil longer and get a badass motor im sure i cant blow up as easily

Almost all of us said we're not building HP Monsters. $30k in 3 years has proved that wrong for me. lol

 

[1996mustangGT]

thx guys im not building a hp monster i just dont wanna plan out just buying a forged rotating assembly in the future and then crack my block esp when i can wait a lil longer and get a badass motor im sure i cant blow up as easily

Almost all of said we're not building HP Monsters. $30k in 3 years has proved that wrong for me. lol

GOD isnt that true...it all started off with a stinking K&N kit and exhaust...lol

 

[duff daddy]

i have ported and polished pi heads by patriot on my car, am very very happy and also putting down 305/310 with a mild cam. running mid 12's

 

[NERD]

thx guys im not building a hp monster i just dont wanna plan out just buying a forged rotating assembly in the future and then crack my block esp when i can wait a lil longer and get a badass motor im sure i cant blow up as easily

Almost all of said we're not building HP Monsters. $30k in 3 years has proved that wrong for me. lol

GOD isnt that true...it all started off with a stinking K&N kit and exhaust...lol

It started for me when I spent $200 on a BBK CAI kit that the only thing it did for me was make a nice whoosh over my stock exhaust and cats. Then it was an off road H pipe. But oh crap, Now I had Idle hang.... Well I can't get it tuned without having a few more mods.... PI engine, TB, Blah Blah Blah...The rest is 600hp of history.

 

[D3VST8R96GT]

hahahahaha ...........do i need a pi intake for pi heads?

i will eventually upgrade the intake (just not the plastic one) but i think i can find some reasonably priced heads right now on CL ......