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Old 01-14-2013, 08:43 AM   #1
Pennywiserawker
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Bronco Info: 95 XL lifted, bored and capable
351w suggestions?

Okay so have done a little bit of searching here but since I'm at work, I'm a little limited with time here.



Engine specs:
-'95 351w roller motor Bored .15 over
-Erson cam ( need to find the cam card)
-1.6 Erson roller rockers
-Stock upper and lower intake
-Stock '95 351w automatic trans Speed Density Computer
-Stock freshened up bottom end
-Stock injectors
-Cast Iron GT40 Lightning heads

The cam is a bit much for the SD comp. I'm looking more into doing the MAF conversion and I'm trying to gather more information about it.

I plan on buying the RJM wiring harness or snagging one from a BKO I saw in my local junkyard.

Member here psmwrx recommended to use the 4 hole Exploder injectors.

Any suggestions you guys have for me would be greatly appreciated

I'd love to get my hands on the matching GT40 upper and lower intake from the Lightning but have had trouble finding the lower. I heard they make some sort of spacer so you can run an Exploder 302 lower. Is that true/okay to do?

Thanks for the help!
Cole
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Old 01-14-2013, 11:46 AM   #2
88bronc91stang
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The 351W GT-40 lower should still be available through FRPP, Summit Racing, Jegs or any of the gazillion aftermarket suppliers that specialize in Ford performance parts. I've never seen any kind of adapter plates that would allow running a 5.0 lower on a 5.8 block. Just imagine, there would be two more intake gaskets to worry about, not to mention the front and rear lifter valley seals would have to be almost an inch thick to compensate. Keep trying the salvage yards if you don't want to buy a new lower...surely some yard either has or can find a Gen I Lightning intake set.
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Old 01-14-2013, 01:51 PM   #3
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Those companies make a reproduction GT40 lower? Or is it something that the GT40 upper will mate up to?

Good call on double the gaskets. That didnt even cross my mind
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Old 01-14-2013, 02:09 PM   #4
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http://www.pricemotorsport.com/html/...e_adapter.html
this place is literally down the road from me

BCbroncos also makes an adapter to go from a 351 lower to a 302 Mustang upper.

there is also the edelbrock efi truck intake you can buy the lower only and then run their mustang upper on top of that.
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Old 01-14-2013, 07:47 PM   #5
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I have seen Lightning lowers recently on ebay and corral.net classfieds. Expect to pay though, $300 plus.

Find that cam card to see if a MAF upgrade will run it.
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Old 01-14-2013, 10:34 PM   #6
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Your not going to find a full gt40 5.8 intake for less than $700. And your surely not going to find one in a j/y. There is always an exception but not in this case.

Like mentioned above, the eddy b intake can be had for a smidge over $600 or go the 5.8 lower-to-5.0 upper. In my opinion, the eddy b intake is not worth the price. Others will disagree but, I felt it was not enough bang for the buck. They're also very hard to find used as well.

You'll be fine running either intake w/ a set of gt40's but keep that cam SD friendly.
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Old 01-14-2013, 10:59 PM   #7
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Quote:
Originally Posted by Pennywiserawker View Post
Okay so have done a little bit of searching here but since I'm at work, I'm a little limited with time here.



Engine specs:
-'95 351w roller motor Bored .15 over
-Erson cam ( need to find the cam card)
-1.6 Erson roller rockers
-Stock upper and lower intake
-Stock '95 351w automatic trans Speed Density Computer
-Stock freshened up bottom end
-Stock injectors
-Cast Iron GT40 Lightning heads

The cam is a bit much for the SD comp. I'm looking more into doing the MAF conversion and I'm trying to gather more information about it.

I plan on buying the RJM wiring harness or snagging one from a BKO I saw in my local junkyard.

Member here psmwrx recommended to use the 4 hole Exploder injectors.

Any suggestions you guys have for me would be greatly appreciated

I'd love to get my hands on the matching GT40 upper and lower intake from the Lightning but have had trouble finding the lower. I heard they make some sort of spacer so you can run an Exploder 302 lower. Is that true/okay to do?

Thanks for the help!
Cole
If you're looking into the RJM wiring harness then you should also look into his 3G 160 amp alt to replace that stock 65 amp one, looks nice black though. That will help power all your new and up coming stuff..... -Kevin-
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Old 01-15-2013, 09:30 AM   #8
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Thanks guys! Yeah I've been running this set-up for almost a year now. It runs fine and has more power than I expected. I just want to make sure it is running as smooth as can be. I know I saved the cam card somewhere but it'll take some time to track the fawker down.

I have often thought about doing the 3G alt upgrade but just haven't found the need/money/time to do so. \
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Old 02-06-2013, 02:24 PM   #9
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351 swap/build

I have a 1992 bronco with the 5.0 as well as a 95 with the 5.8. I just got the 95 for the engine and trans, I plan on building the 351w starting in a month or so and I am trying to decide the best route to go. Preferably I would like to take the 351 .030 oversize and find a set of gt40s off of a 96-97 explorer and have them milled and drilled to fit the windsor. What i desperately need help with is a cam and good rebuild kit. I found several on summit but I am unsure of whether or not I should get hypereutectic or forged dish pistons. The hypers have a 9.12:1 comp ratio with 63cc heads and the dishes have a 9.06:1 with 63 cc heads. I would like to get 330-350 whp out of the truck so anyone who has done this or knows of a good streetable yet aggressive build please chime in. I know its going to be hard but i would like to stay around 2k on the build.

thanks in advance
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Old 02-06-2013, 03:07 PM   #10
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In complete honesty, i took my entire motor apart down to a short block and took it to a good friend of mine who specializes in Gran National motor work. But he knows a good bit about mustang stuff as well. I bought the cast iron Lightning heads on CL for $265 and the were freshly rebuilt. Took the SB and heads to him and told him what I really wanted to do, my budget and that it was going in a 6500 lb truck lol. I paid him 2k total and this motor runs way beter than I ever expected.
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Old 02-06-2013, 08:51 PM   #11
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That is good news I'm thinking about using a set of GT40's I aquired yesterday I am on 37's and have a ZF5-47 ready for a swap. What gears are you running and are you happy with them?
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Old 02-07-2013, 12:50 AM   #12
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Originally Posted by 88bronc91stang View Post
The 351W GT-40 lower should still be available through FRPP, Summit Racing, Jegs or any of the gazillion aftermarket suppliers that specialize in Ford performance parts. I've never seen any kind of adapter plates that would allow running a 5.0 lower on a 5.8 block. Just imagine, there would be two more intake gaskets to worry about, not to mention the front and rear lifter valley seals would have to be almost an inch thick to compensate. Keep trying the salvage yards if you don't want to buy a new lower...surely some yard either has or can find a Gen I Lightning intake set.
being from the mustang world I have seen the spacers so you can use a 302 lower. you are right though..they are a PITA. prone to leakage.
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Old 02-07-2013, 12:35 PM   #13
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So can someone knowledgable of 351w help me with some suggestions about a budget build. I want to use gt40 heads, maybe the E7s I someone can convince me they can flow as well as the others for around the same price. I am lookin for 350 whp and spend 2k or less.
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Old 02-07-2013, 02:37 PM   #14
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Originally Posted by Jlrobbins View Post
So can someone knowledgable of 351w help me with some suggestions about a budget build. I want to use gt40 heads, maybe the E7s I someone can convince me they can flow as well as the others for around the same price. I am lookin for 350 whp and spend 2k or less.

I don't want to burst your bubble but it just isn't going to happen. There is no way you will get 350, 340, 330, 300, or even 275 whp with any Ford cast iron head. Think about it for a second. The Lightning engine had a great performing GT40 intake, GT40 heads, 65mm tb, and factory headers. They lay down a whopping 220 to the tires and this is through a 2wd setup. Lets say you get an offroad exhaust with Longtubes all in 3", swap the camshaft to something a little more aggressive and add 1.7's. You still have heads that even when ported don't flow well above .500 lift. That really limits the camshaft selection. Now lets think about the SD aspect of it. Anything more than 220 duration and a 114 LSA and you need MAF. Anything above 210 and you really need a stall converter too.

I personally have Longtubes, AFR heads, HO Roller camshaft, GT40 intake, 70mm tb, 4" CAI, 1.7 RR's, UD crank pulley, Electric fan, and a tune. That combo was making 300 to the tires. Any combo that has heads with the letters GT40, GT40P, or E7, and you can count on 250hp to the tires. Thats assuming headers, intake, exhaust, and camshaft are all upgraded from stock Bronco 5.8 parts. if you want to just barely make or maybe on a good day slightnly exceed 300hp to the tires then you will need TW 170's, 190's, AFR 165, 185 in the combo.
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Old 02-07-2013, 02:49 PM   #15
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Originally Posted by huggyb1972 View Post
That is good news I'm thinking about using a set of GT40's I aquired yesterday I am on 37's and have a ZF5-47 ready for a swap. What gears are you running and are you happy with them?
Im running 4.10's and they are a perfect match for the ZF and the 37's
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Old 02-07-2013, 06:40 PM   #16
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Wierd I was thinking 4:10 would be a little to tall on the top end. I was thinking more along the lines of 4:56. How much trail do you see with yours?
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Old 02-07-2013, 07:20 PM   #17
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Well how much would the tws or afr heads run me? I'm gonna get at least 300 out of it or I'm gonna reconsider the build and put the money into an old 86 fs blazer with a 6.2 diesel that needs swapped to a gas truck. What cams are ad friendly. I've heard a lot about the 5.0 ho cams but I don't want to put a used cam in with all new internals. Does anyone know that cam specs so I could call around about having one ground to the right spec if I go that route.
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Old 02-07-2013, 07:39 PM   #18
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10.1 compression ratio
TW 170 FAC heads
GT40 or ported RPM intake
Cam with 212/218 dur, .555/.575 lift, 114 LSA
30# inj
Shorty or LT headers, 2.5" exhaust
70mm tb
1.6 Roller Rockers
Mark VIII electric fan
Chip for the 30's.

That will get you 300 to the wheels.
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Old 02-07-2013, 09:16 PM   #19
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Originally Posted by Diabolic View Post
I don't want to burst your bubble but it just isn't going to happen. There is no way you will get 350, 340, 330, 300, or even 275 whp with any Ford cast iron head. Think about it for a second. The Lightning engine had a great performing GT40 intake, GT40 heads, 65mm tb, and factory headers. They lay down a whopping 220 to the tires and this is through a 2wd setup. Lets say you get an offroad exhaust with Longtubes all in 3", swap the camshaft to something a little more aggressive and add 1.7's. You still have heads that even when ported don't flow well above .500 lift. That really limits the camshaft selection. Now lets think about the SD aspect of it. Anything more than 220 duration and a 114 LSA and you need MAF. Anything above 210 and you really need a stall converter too.

I personally have Longtubes, AFR heads, HO Roller camshaft, GT40 intake, 70mm tb, 4" CAI, 1.7 RR's, UD crank pulley, Electric fan, and a tune. That combo was making 300 to the tires. Any combo that has heads with the letters GT40, GT40P, or E7, and you can count on 250hp to the tires. Thats assuming headers, intake, exhaust, and camshaft are all upgraded from stock Bronco 5.8 parts. if you want to just barely make or maybe on a good day slightnly exceed 300hp to the tires then you will need TW 170's, 190's, AFR 165, 185 in the combo.
ok first of all, all manufactures of this area were prone to under estimating actual rhp output to prevent getting the crazy eye look from the EPA. So you cant base your logic off that.
Secondally, you are incorrect, a gt40 iron is capable of handling 300 + horse power. Heads are not the the only variable to produce horse power. With mild porting and polishing of ports and gasket matching..a iron GT40 matched with the right components can produce over 300 rear wheel horse power naturally aspirated. more with forced induction or nitrous.
I had gt40's in a mustang both natural aspiration and forced induction and have produced 300-400 respectively. With a 302.
It can be done.
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Old 02-07-2013, 09:23 PM   #20
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Originally Posted by Jlrobbins View Post
So can someone knowledgable of 351w help me with some suggestions about a budget build. I want to use gt40 heads, maybe the E7s I someone can convince me they can flow as well as the others for around the same price. I am lookin for 350 whp and spend 2k or less.
I have been toying with 302- 351 windsors for over 10 years. I can tell you it can be done, but its not just the heads. you have to take in account everything else; induction, exhaust, cam, timing, fuel, and computer.
Bud, I think you are going to hit a wall with the computer. These Bronco computers do not adjust to variable changes; like air intake, fuel ratios, higher combustion, more timing, valve overlap, ect.. These computers are designed to run the motor efficent with minimal emmisions.
To get your disered horse power, if you want to stay fuel injected, I think you will have to invest in a computer management system or chip.
If you want to carb i think you can get it with in your budget.
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