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Message
re: OB grease monkeys: rebuilding 92 Bronco engine
Posted on 8/10/16 at 11:41 am to bamarep
Posted on 8/10/16 at 11:41 am to bamarep
Aluminum is lighter and dissipates heat better.
Valves are bigger, giving you more flow and the chambers are a little smaller giving you a little bit more compression. Ports are polished, so they flow better than the cast stuff.
Night and day difference just with parts replacement.
Valves are bigger, giving you more flow and the chambers are a little smaller giving you a little bit more compression. Ports are polished, so they flow better than the cast stuff.
Night and day difference just with parts replacement.
0
Posted on 8/10/16 at 12:06 pm to meauxjeaux2
That's a sweet looking engine meaux.
Thanks for the clarification Hardy!
Thanks for the clarification Hardy!
Posted on 8/10/16 at 12:34 pm to bamarep
Stick to OEM parts for this unless you want to spend a lot more money. Ford GT40 heads will bolt on without needing new or modified pistons and will work just fine with a B303. Spending extra money for TW isn't going to gain you anything, the B303 doesn't have the lift to take advantage of them anyway. Remember, this is a truck not a Mustang and you want more low end. Also, you have a 351W which requires adapters to run 5.0L lowers. The GT40 parts work well because the upper and lower intakes are longer runners than the stock 5.0. Aftermarket 5.0 intakes tend to shorten the runners while opening up the ports, great for top end HP but not so much low end torque. The 5.0 Explorers used cast-type GT40's vs the Lightning tubular style, heavier but still the same port/runner configuration so it's only a matter of finding the 351W lower. Look around for anyone selling the 351W RF-F2TE intake assembly too.
Posted on 8/10/16 at 12:46 pm to Clames
Thanks for all the input guys.
Posted on 8/10/16 at 12:51 pm to Clames
Posted on 8/10/16 at 2:26 pm to meauxjeaux2
Yeah, I've got boxes of MM&FF magazines going back to the early 90's. I've also got experience from having my own 5.0 notchback, my brother's 5.0 SN95, a 93 Lightning, and several turbo or supercharged small block/Modular Mustangs. CFM is just one small metric and not even close to the most important one. Simply no need for a TrickFlow setup, won't make him any more useable power. Trucks need port velocity and long, round intake runners and ports do better than short, square ones. No, they don't look as good on a flow bench but nobody drives flow benches either.
Posted on 8/10/16 at 2:34 pm to Clames
quote:
eah, I've got boxes of MM&FF magazines going back to the early 90's
same here. quote:hmmm. Are your initials KK?
I've also got experience from having my own 5.0 notchback, my brother's 5.0 SN95, a 93 Lightning, and several turbo or supercharged small block/Modular Mustangs.
quote:
CFM is just one small metric and not even close to the most important one. Simply no need for a TrickFlow setup, won't make him any more useable power. Trucks need port velocity and long, round intake runners and ports do better than short, square ones. No, they don't look as good on a flow bench but nobody drives flow benches either.
Ford A certified tech and i've had my hands in drag racing Fords since the 80's. You are correct about that. Especially with the long runners = better low end torque. I've ran all of those intakes and cams in cars and have had a few friends with trucks. Trickflow just has my heart since their components come together so much nicer than anything i've seen or had with SVT,AFR and Eldelbrock .
And as to the bolded part, you are talking about over your recommendation and not stock right?
This post was edited on 8/10/16 at 2:36 pm
Posted on 8/10/16 at 2:36 pm to meauxjeaux2
Hell, I just need to stock up on beer and steaks and have you baws over for a wrench turning party.
Posted on 8/10/16 at 2:40 pm to bamarep
Posted on 8/10/16 at 3:04 pm to meauxjeaux2
I just recommend he raid a few junk yards and scare up some cheap parts that will give him pretty much all he needs without any difficulty. Since he's planning on going back to a manual transmission he's going to lose the torque multiplication of the torque converter too. Ford did their homework on the First Gen Lightning 5.8L, that would be a great engine setup for the OP and parts aren't hard to find. That and he can get a TwEECer to do his own tuning which should be no issue with those parts.
Posted on 8/10/16 at 3:12 pm to Clames
does your last name start with K?
Posted on 8/10/16 at 3:12 pm to Clames
@Clames, you're suggesting I search salvage yards for the "lightning" model 5.8L heads?
Posted on 8/10/16 at 3:52 pm to bamarep
quote:
does your last name start with K?
Nope.
quote:
@Clames, you're suggesting I search salvage yards for the "lightning" model 5.8L heads?
If you find a yard with those heads still attached to the motor then you've found a whole Lightning 5.8L which you better buy for parts...
No, I don't think you'd be that lucky but there are lots of 1997+ 5.0 Explorers that have the GT40P heads which would work just fine and be much better than the boat anchors currently attached to that motor. The tricky part would be the upper and lower intake issue since finding a complete Lightning upper and lower will be difficult and probably not cheap though not as expensive as aftermarket pieces. Posted on 8/11/16 at 7:43 am to Clames
Sorry for being such a DA guys. So 97+ 5.0 heads will give me a little more pep, right?
And, I'll need to swap over my intake if I add those GT40 heads?
And, I'll need to swap over my intake if I add those GT40 heads?
Posted on 8/11/16 at 8:38 am to bamarep
Don't put the 5.0 heads on that 351. The combustion chambers are smaller and would bump the compression ratio up to where you'd have to run premium gas all the time.
The GT40 heads on the 5.0 Explorer clames is talking about are special 5.0 heads with larger combustion chambers.
The GT40 heads on the 5.0 Explorer clames is talking about are special 5.0 heads with larger combustion chambers.
Posted on 8/11/16 at 8:46 am to Clames
quote:You an engineer or machinist? You seem to know some highly technical stuff about lots of different things.
Clames
Posted on 8/11/16 at 8:48 am to meauxjeaux2
Is there a way to tell the difference?
Posted on 8/11/16 at 9:40 am to bamarep
Casting numbers on the heads will tell you what they are. GT40P heads have F1ZE-AA while the Cobra GT40 heads are F3ZE or F4ZE. The Explorer GT40P heads will have 4 bars cast into the front of one of the heads too. As long as you are pulling the heads from a SUV you'll get what you need. You'll need new springs for that B303 cam though, stockers are marginal with Mustang cams.
This post was edited on 8/11/16 at 9:41 am
Posted on 8/11/16 at 9:52 am to Clames
So I understand correctly, they only used the GT40P heads on the SUVs? And those are the ones I need due to them using a larger combustion chamber than the Mustang engines?
Again, sorry for being a dumbass about this stuff.
Again, sorry for being a dumbass about this stuff.
Posted on 8/11/16 at 10:11 am to bamarep
yes. And as he said ,get some decent beehive valve springs and chrome molly retainers as well.
LINK
great source for parts
LINK
great source for parts
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