stock heads worth anything?

trav_19 · Jan 3, 2007

well i was wonding whats the potential from the stock head? im tight in money from being laid off but i want to get anything i can would 1.7 roller rocker be worth installing? maybe a port job? but i think porting is pricey how mush does that run? is it worth it any advice would be appreciated.

HISSIN50 · Jan 3, 2007

Trav, I'd chat with one of the gurus - Mike (Thumper460). He can tell you pricing and what to expect. He has a good bit of info on his site too as I recall (note: it's been some years since I read his site).

There are some guys making some nice power with his ported E7's. But some nice alum heads have the benefit of helpin with the ping-thing (not much of a consideration for fox III's, which seems to be one of Mike's main audiences).

Good luck bud.

final5-0 · Jan 3, 2007

E7's can provide a lower cost option for more power

I'm gonna cut to the chase this time

Your power expectations
or
Your money spent on them

If either one of them climbs too high

They cease to be a viable mod IMHO

Take it from someone who has been down that road

I got a little bit of info about .............
my self ported E7 head combo on my site if you care to look

I'd tell you to ...........
Really think about what you want before you go in that direction
because
for me ... they just did not deliver enough go fast

Grady

VibrantRedGT · Jan 3, 2007

Come get my E7's out of my garage. Get the work done to them then swap them out.

trav_19 · Jan 3, 2007

thanks guys i have been debating what grady just said....if i spend all the money to work my stock heads then there not gonna be everything i want...then i have to buy new heads and i could have just saved for them in the first place hmmmm....also i would take you up on your offer for the stock heads but your in florida and im in michigan soo haha not to fesiable...i think im gonna do a little more reserch im heading to your page grady and i will go from there thanks guys

1slow95 · Jan 4, 2007

It's been a while since I looked at Thumper's site, but if I remember correctly he says ported e7's will outperform stock gt-40 heads. But ported gt-40's will easily outperform the ported e7's. It takes a LOT of work to get the gt-40's up to 300rwhp, where a good set of aftermarket heads will put you right around that 300hp mark right out of the box.

The Green GT · Jan 4, 2007

I have 1.7s on mine and i have a set of ported ones that are going on if I ever blow a headgasket. But Im not gonna just swap them out for about 20 HP.

GTA_V6_Mustang · Jan 4, 2007

VibrantRedGT said:
Come get my E7's out of my garage. Get the work done to them then swap them out.

Ill take ur E7's

legalize420 · Jan 4, 2007

see if you could find some gt40's for a decent price. i paid about $900 for my heads, cam, rockers, and intake. that is including $80 for shipping the heads and $180 machine shop bill. the heads were tanked, got a valve job, and resurfaced. just get a nitrous kit

trav_19 · Jan 4, 2007

..i need to do something im leaking oil like a mofo!!! i think its the rear main? havent really checked it out...if i pull the motor then im gonna build it...timing sucks! if only i wasnt laid off...thanks to grady im really leaning towards a 347 kit trying to find a good combo at a reasonable rate..what heads are you 347 guys running? probley 165's right

1slow95 · Jan 4, 2007

I'd recommend a set of 185's for a 347.

1red95gt · Jan 5, 2007

I've got really worked over e7's on my 347 in my capri... but I wouldnt go that route. If I did it all over again, I'd go with 185's or gt-40x.

final5-0 · Jan 5, 2007

1red95gt said:
I've got really worked over e7's on my 347 in my capri... but I wouldnt go that route. If I did it all over again, I'd go with 185's or gt-40x.

I can see the AFR 185's

but

I've always seen GT40x heads as an Aluminum version of GT40/40p's
thus
Way too small for a 347 Stroker

Grady

Killercanary · Jan 5, 2007

Grady, the GT40Y's were the aluminum version of the GT40 iron heads found on the stock cobra's. The GT40X's were different and had a lot of improvements over the typical GT40Y/GT40. Its been too long for me to remember what exactly was changed, but they did have added improvements over the others in the GT40 family. I do agree that they are small for a 347 though!

IMO playing with the stock E7 heads is a waste of time and money for most guys. It all depends on what you want though.

Black95GTS · Jan 5, 2007

You can spit shine a turd, but its still a turd.

- My grandfather

JJ95GTID · Jan 5, 2007

The GT40 Y303 heads are not just an aluminum version of the GT40 cast iron heads. They flow better. The GT40 X303/X305 flow even better than the Y303 heads. FRPP advertises the Y303 as a 40hp gain of stock heads. I can say that they definately do deliver. I ran on average .4sec faster in the 1/4 mile with just the head swap. I won't say that the Y303 heads are the best because they are not. But, for the budget minded the Y303 heads are a good choice over any GT40 cast iron heads or even ported E7TE heads for the price.

final5-0 · Jan 5, 2007

Hey Paul

Thanks for the info

Being as you put it that way, seems as if I do remember it like that
and
I wanna associate the phrase "Turbo Swirl" with the GT40x head

I still think those heads aren't in the same category as
the heads of today such as TFS, Edel's, AFR and the like

Adam

I just love those sayings we used to hear from our Grandparents

My GrandMaw would have said something along the lines of .......

Trying to make a Silk Purse out of a Sow's Ear

Grady

JJ95GTID · Jan 5, 2007

Grady,

Turbo Swirl is associated to the Y303 heads.

Turbo Swirl 'Extra performance' are the X303/305 variety.

I will agree that the FRPP GT40 aluminum heads are dated.

The new FRPP Z304 heads (not a GT40) will perform with today's aftermarket offerings.

trav_19 · Jan 5, 2007

would a sr. or junior head be good for a 347?? my local stang guru is moving to big blocks in both his cars

JJ95GTID · Jan 5, 2007

trav_19 said:
would a sr. or junior head be good for a 347?? my local stang guru is moving to big blocks in both his cars

If you can get the heads for cheap then yes. $700 or less for a set is what I would expect to pay. They are on par with the aluminum GT40 heads as far as flow goes. They flow less on the intake but a little better on the exhaust according to the head flow chart in the 'sticky' thread.
http://forums.stangnet.com/showthread.php?t=665335

stock heads worth anything?

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