331 stroker vs 347 stroker???

[rocket 5979]

I never said you can't make power w/ it, just that it's outdated technology compared to what's available now. Run those same setups your talking about w/ a custom cam and they will make more power....not that you necessarily need it when your over 1k to the wheels....



I'm newer to Explorer's, but am very familiar w/ Mustangs...Why would the X heads fit your headers, but AFR's or TFS Twisted Wedge's wouldn't? On a 5.0 or 5.8 Stang, they're a direct swap....No header changes necessary.

Because the GT-40P heads have a different spark plug angle that is unique to the Explorer's. That is why when you see a Fox 5.0 guy that decided to do a JY swap to the GT-40P's to get more power they have to get different headers, or have their current ones modified.

 

[gspfunk]

Because the GT-40P heads have a different spark plug angle that is unique to the Explorer's. That is why when you see a Fox 5.0 guy that decided to do a JY swap to the GT-40P's to get more power they have to get different headers, or have their current ones modified.

I understand that....the primaries on P specific headers come straight out from the head farther before they turn down toward the collector. The P specific headers should still bolt up to almost any other SBF head, though, because they provide more plug/wire clearance. Also, most LT headers will clear P heads....although fabrication would be required on the collector side for Explorers.

Please don't misunderstand my comments...I'm really not trying to argue, just understand. I've had evil thoughts of a 302 or 351 Explorer on my brain for a while (couple other projects ahead on the list), so I'm trying to learn what the differences would be w/ the install/setup as opposed to the same thing on a Foxbody.

 

[rocket 5979]

I understand that....the primaries on P specific headers come straight out from the head farther before they turn down toward the collector. The P specific headers should still bolt up to almost any other SBF head, though, because they provide more plug/wire clearance. Also, most LT headers will clear P heads....although fabrication would be required on the collector side for Explorers.

Please don't misunderstand my comments...I'm really not trying to argue, just understand. I've had evil thoughts of a 302 or 351 Explorer on my brain for a while (couple other projects ahead on the list), so I'm trying to learn what the differences would be w/ the install/setup as opposed to the same thing on a Foxbody.

Anything is doable. You just have to modify a few things here or there.

 

[CDW6212R]

I glanced at my 98 and the cast iron headers, they appear to have enough space to move .400" for me. I don't have another set of those for modifying, my extra pairs I think are both for GT40 heads.

How much taller are the typical valve covers compared to stock? I got a set which aren't the very tall style, but they are taller than the short OEM pieces. I'd like to avoid any big fabrication of the EGR pipe. I'll use which ever header is better or easier to get in to start with.

 

[Exploderpilot]

What ever stroker setup you go with, get the bessel valley support. I had never heard of it, but when I started building my 347 bottom end, a guy told me about it and showed me the numbers he was making in his mustang, with not a single worry about rod angle or cylinder wall strength, because of how much it stiffens the block.

 

[justin146]

I'm newer to Explorer's, but am very familiar w/ Mustangs...Why would the X heads fit your headers, but AFR's or TFS Twisted Wedge's wouldn't? On a 5.0 or 5.8 Stang, they're a direct swap....No header changes necessary.

A Mustang has more room under the hood and adjustment in the exhaust to make up for the higher ports- but the Explorer engine bay is really cramped. You could run into a situation where there isnt enough room without major mods to move the manifolds/headers up .4" in an Explorer.

 

[gspfunk]

A Mustang has more room under the hood and adjustment in the exhaust to make up for the higher ports- but the Explorer engine bay is really cramped. You could run into a situation where there isnt enough room without major mods to move the manifolds/headers up .4" in an Explorer.

That was the missing piece of info...Now I'm on the same page.....