head swap

[legalize420]

i just picked up a set of used gt40's. i plan on doing some searching and reading up more on the swap within the next few days. couple of questions. what will i be able to reuse. should i invest in some rockers. the heads have a little over 100k on them. do the springs need to be changed. i will definetly be picking up the new bolts but should i get some new pushrods while im at it. thanks

 

[urban96]

i would get a valve job done on them and if your swaping the cam get matching springs

 

[legalize420]

i would get a valve job done on them and if your swaping the cam get matching springs

i wasnt planning on doing the cam. will the stock cam be fine for now? what can i expect it to cost for a valve job?

 

[final5-0]

i just picked up a set of used gt40's. i plan on doing some searching and reading up more on the swap within the next few days. couple of questions. what will i be able to reuse. should i invest in some rockers. the heads have a little over 100k on them. do the springs need to be changed. i will definetly be picking up the new bolts but should i get some new pushrods while im at it. thanks

I got this thing about iron heads IF you are only gonna have them for a while until you step up to some better flowing heads.

Put a set of springs on em from Crane, Comp, etc and thats it. That way you don't have much money in em and won't loose much if any when you upgrade.

As for rr's, they don't give you hardly anything and IMHO, why would you want to put ped rr's on a nice set of heads anyway.

btw, if those heads have not been milled, you should be able to reuse your pr's. You can reuse your rockers also but the springs might be tired so have them chcked or just replace them as springs are not too expensive.

Later
Grady

 

[94opalgt]

if you are using the stock cam get a set of 1.7 roller rockers.do not reuse the stock stamped garbage,if that is what you were going to do.and get new springs.and the already mentioned valve job.and have them ported and polished,i think tmoss does this for cheap i hear.

 

[legalize420]

thanks. i will take them to get inspected. as far as replacing parts and upgrading i really have limited knowledge of what needs to be done and what would be a good idea to do with the heads now. i was just trying to get some ideas of what needs to be done. i will do some more searching when i have time and see what else i can come up with. im just trying to make this go as smooth as possible. thanks.

 

[legalize420]

what about injectors. i have the 19s on now, but i have a set of 24s in the garage. will i need the 24s on the gt40 heads?

 

[legalize420]

I got this thing about iron heads IF you are only gonna have them for a while until you step up to some better flowing heads.

Put a set of springs on em from Crane, Comp, etc and thats it. That way you don't have much money in em and won't loose much if any when you upgrade.

As for rr's, they don't give you hardly anything and IMHO, why would you want to put ped rr's on a nice set of heads anyway.

btw, if those heads have not been milled, you should be able to reuse your pr's. You can reuse your rockers also but the springs might be tired so have them chcked or just replace them as springs are not too expensive.

Later
Grady

do you mind explaning the difference in stud and ped mounted. is that determined by the heads or by choice.

 

[final5-0]

do you mind explaning the difference in stud and ped mounted. is that determined by the heads or by choice.

Some heads give you the choice of either rr and some don't.

btw, Ford iron heads usually do not use stud rr's so we're talking about Aluminum heads here.

The stud mount will end up costing more due to needing guide plates and hardned pr's but ... IMHO, they are worth it

The stud rr's are a little stronger, more stable at higher rpms, easier to adjust, and in general, give you flexability with your adjustments.

Here is a link to a thread where Paul (Killercanary) tells about his experience with ped mount rr's which will help.

http://forums.stangnet.com/showthread.php?t=569013

Later
Grady

 

[igotyofire]

i hear u can get away with the stock cam, its suppose to be more aggressive then the stock cobra cam from my understanding, ive never checked tho

 

[legalize420]

btw, Ford iron heads usually do not use stud rr's so we're talking about Aluminum heads here.

Here is a link to a thread where Paul (Killercanary) tells about his experience with ped mount rr's which will help.

http://forums.stangnet.com/showthread.php?t=569013

so what about the gt 40s off a 94 cobra. basiclly your saying they can only be ped, right?

not sure if maybe i missed something in the posts that could be of help, all i got out of it was how much of a PITA they are.

 

[final5-0]

so what about the gt 40s off a 94 cobra. basiclly your saying they can only be ped, right?

Crane used to make a conversion kit thing for E7, gt40's etc but the stud post was pretty tiny so it was kinda mickey mouse if you know what I mean.

Yeah, for the most part all of the Ford oem iron heads are ped's.

not sure if maybe i missed something in the posts that could be of help, all i got out of it was how much of a PITA they are.

He was showing another member who, like you, asked about some info to explain his preference of stud over ped mount. Keep in mind Paul was talking about his AFR heads and not oem iron heads.

I just was trying to point out that if you put a lot of money in those heads your not gonna get it back out of em if you plan to move up to a better head.

The gain from rr's over the oem rockers on those heads is gonna be very minimal. If you wanna go to a better head anyway then only buy one set of rr's. The ones your gonna keep.

If you plan on keeping those iron heads then you most likely would do things differently.

Just trying to share some info with you, thats all.

Later
Grady

 

[legalize420]

Crane used to make a conversion kit thing for E7, gt40's etc but the stud post was pretty tiny so it was kinda mickey mouse if you know what I mean.

Yeah, for the most part all of the Ford oem iron heads are ped's.



He was showing another member who, like you, asked about some info to explain his preference of stud over ped mount. Keep in mind Paul was talking about his AFR heads and not oem iron heads.

I just was trying to point out that if you put a lot of money in those heads your not gonna get it back out of em if you plan to move up to a better head.

The gain from rr's over the oem rockers on those heads is gonna be very minimal. If you wanna go to a better head anyway then only buy one set of rr's. The ones your gonna keep.

If you plan on keeping those iron heads then you most likely would do things differently.

Just trying to share some info with you, thats all.

Later
Grady

i definetly apprectiate all the info . i dont plan on keeping these heads for ever but at lest for a few years. im not trying to put alot of money into them. i am trying to get away with only what i need to have them on my car.

 

[legalize420]

what do you think about the injectors. i have a set of 19s and 24s. thanks

 

[final5-0]

what do you think about the injectors. i have a set of 19s and 24s. thanks

Since you run the C&L, stepping up to those 24's would not be too big of a deal. Not totally a must do kind of thing at this time however.

I believe I'd get the heads on and get all the bugs worked out from the upgrade and then do the inj upgrade.

Later
Grady

 

[legalize420]

Since you run the C&L, stepping up to those 24's would not be too big of a deal. Not totally a must do kind of thing at this time however.

I believe I'd get the heads on and get all the bugs worked out from the upgrade and then do the inj upgrade.

Later
Grady

sounds good. thanks again

 

[tmoss]

....and have them ported and polished,i think tmoss does this for cheap i hear.

Sorry, I just do intakes - not heads.