302 upper intake Manifold
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From: North Central Washington
302 upper intake Manifold
I have a 351w out of a 1987 Bronco that I plan on installing in my 69. I'm just wondering if I pick up an upper intake off of 302, is that a good idea? Some time back I did see an adapter somewhere or is it better to get something else to start with.
The upper intake I looked at had oval ports where it bolted to the lower unit, the one on my 351 if rectangle.
Thanks for any pointers
Tim
The upper intake I looked at had oval ports where it bolted to the lower unit, the one on my 351 if rectangle.
Thanks for any pointers
Tim
Hotshot
Joined: Jul 2002
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From: Bend,OR
a 302 upper wont fit a 5.8 lower. you can look into the edelbrock efi truck upper/lower or get a gt40 5.8 lower/upper. also check out the typhoon intakes on ebay. they work out real well from what i have read.
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From: Ottawa, Ontario
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From: North Central Washington
Good question, all good questions. Now you have me thinking. I will check it out tomorrow, it's been a while sense I looked at the motor but I am thinking that my manifold looks different then both of yours. I will take pictures and see if I can figure out how to post them.
Oh ya this is the adapter I was talking about BC Broncos and I can see now after looking at the adapter that it would not work with what I think I have. Hmmmm
Thanks Tim
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From: North Central Washington
Good question, all good questions. Now you have me thinking. I will check it out tomorrow, it's been a while sense I looked at the motor but I am thinking that my manifold looks different then both of yours. I will take pictures and see if I can figure out how to post them.
Oh ya this is the adapter I was talking about BC Broncos and I can see now after looking at the adapter that it would not work with what I think I have. Hmmmm
Thanks Tim
Oh ya this is the adapter I was talking about BC Broncos and I can see now after looking at the adapter that it would not work with what I think I have. Hmmmm
Thanks Tim
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From: maui.HI
BC bronco has an adapter for a 351w truck lower to a 5.0ho upper part #11-81000. It allows the use of the car style upper to adapt to the 351w truck lower but it's for the oval shaped ports. The description states this will help with the hood and firewall clearance when installing a 351w. Sometime ago I asked if any members tried this adapter because I was very intrested in it's performance and fit but no one replied. What do you think Conanski, good or bad?
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I think it's a good idea when the goal is to utilize scrap yard parts to fit a stock EFI 351 in a car or other tight engine bay. It won't produce anywhere near full performance from a 5.8 however, the HO intake is really only big enough for the stock heads.. which only flow enough for about 275hp.. which the 5.8 can do at under 4500rpm. So if you want to make proper SBF power(1hp/cu in) or better an aftermarket intake will be needed along with better heads.
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From: North Central Washington
OK well I guess I was suffering from CRS. I do have a 351W and my manifold does have the oval ports. So Conanski what are my options? GT40 5.8 upper/lower manifold or the Typhoon setup as Kemicalburns mentioned? You had also mentioned better heads, what are my options there?
Thanks for the help
Tim
Thanks for the help
Tim
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From: Ottawa, Ontario
First of all.. what are your goals and what is your budget? It's all to easy to sink a pile of cash into a motor in a hurry, I have $3k in parts for my 5.8 right now and I'm still missing stuff.
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From: North Central Washington
My Bronco will mainly be a daily driver with some occasional off road trips. I am undecided on transmission options but I am leaning toward the NV3500, 35" tires, 2" body lift, currently 3.5" suspension lift.
As far as the motor goes I was originally thinking I would be able to have it ready to be installed for $2k but after looking into it some if I can do it for $3k +/- I would be happy.
Tim
As far as the motor goes I was originally thinking I would be able to have it ready to be installed for $2k but after looking into it some if I can do it for $3k +/- I would be happy.
Tim
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From: Ottawa, Ontario
Are you doing a rebuild on the motor or just running it as is with some bolt-ons?
The reason I ask is because a rebuild will take a chunk of your budget so you won't have enough left for all the little things that cost real money and are needed to make an EFI motor run with a significantly better than stock top end on it. I gather this is going in the 69 bronco, so you need a computer and engine harness, do you have these? The stock SD EFI system in these trucks won't support much beyond 300hp, as a result making big power requires upgrades like a mass air computer and a tuner.
There are other options though. GT40 heads are better than stock and are pretty cheap used. You could have the stock intake extrude honed for a bit more flow. With nothing more than an upgraded cam and a decent exhaust an otherwise stock 5.8 produces pretty good power.. very torquey. You could just do this and probabaly be happy for now, gives you more money for other things.
The reason I ask is because a rebuild will take a chunk of your budget so you won't have enough left for all the little things that cost real money and are needed to make an EFI motor run with a significantly better than stock top end on it. I gather this is going in the 69 bronco, so you need a computer and engine harness, do you have these? The stock SD EFI system in these trucks won't support much beyond 300hp, as a result making big power requires upgrades like a mass air computer and a tuner.
There are other options though. GT40 heads are better than stock and are pretty cheap used. You could have the stock intake extrude honed for a bit more flow. With nothing more than an upgraded cam and a decent exhaust an otherwise stock 5.8 produces pretty good power.. very torquey. You could just do this and probabaly be happy for now, gives you more money for other things.
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Joined: Jul 2002
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From: Bend,OR
I would also go with a ZF 5speed vs the nv3550. the zf has the granny low first like an np435 but with the od gear.
if you go efi, just get a mustang mass air harness complete with injector harness and then work on getting an A9L or A9P equilivant. using this setup is much easier because the engine bay or your bronco is much smaller
if you go efi, just get a mustang mass air harness complete with injector harness and then work on getting an A9L or A9P equilivant. using this setup is much easier because the engine bay or your bronco is much smaller
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From: North Central Washington
Conanski,
Yes I plan on doing a rebuild and after you asked I looked around for some of the other parts I need and I can see that $3k is not going to go far.
I plan on going to the MAF setup and I am just trying to figure out what to buy? Starting with the Intake Manifolds because I know that is something I am going to need. I found a couple of GT40 lower intakes for the 5.8 but nothing listed for the upper intake.
I also seen a few listings for the Typhoon intake system but they are made in China and I don't want anything made in China unless there is no other option.
So what do you think of the GT40 intake system? Would I use the upper intake off of a 5.0 or is there one made for the 5.8?
Kemicalburns,
Thanks for the tip on the transmission and I have checked at the local wrecking yard for a Mustang MAF harness and computer. What vehicle does the A9P computer come on? And are they only computers I should be looking for or are there others that will work?
Tim
Yes I plan on doing a rebuild and after you asked I looked around for some of the other parts I need and I can see that $3k is not going to go far.
I plan on going to the MAF setup and I am just trying to figure out what to buy? Starting with the Intake Manifolds because I know that is something I am going to need. I found a couple of GT40 lower intakes for the 5.8 but nothing listed for the upper intake.
I also seen a few listings for the Typhoon intake system but they are made in China and I don't want anything made in China unless there is no other option.
So what do you think of the GT40 intake system? Would I use the upper intake off of a 5.0 or is there one made for the 5.8?
Kemicalburns,
Thanks for the tip on the transmission and I have checked at the local wrecking yard for a Mustang MAF harness and computer. What vehicle does the A9P computer come on? And are they only computers I should be looking for or are there others that will work?
Tim
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From: Ottawa, Ontario
If you can get a 5.8 GT40 lower you can use either the GT40, cobra, or explorer upper intake on it, all are slightly different but have the same runner pattern and size.
I have a Typhoon intake for my 5.8, and while the finish is not as clean as what you would get from other companies, the machine work is well done and there is lots of material in the casting so porting won't be a problem. Here it is with a black crinkle powdercoat finish...
P.S. It doesn't come this way, you have a choice of natural aluminum or polished. I bought the natural finish and had the powdercoat applied locally. Total cost after the coating was about $550.
I have a Typhoon intake for my 5.8, and while the finish is not as clean as what you would get from other companies, the machine work is well done and there is lots of material in the casting so porting won't be a problem. Here it is with a black crinkle powdercoat finish...
P.S. It doesn't come this way, you have a choice of natural aluminum or polished. I bought the natural finish and had the powdercoat applied locally. Total cost after the coating was about $550.
