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Old 01-23-2012, 07:47 AM   #1
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b303 cam

I need some help and everyone has been alot of help on here priorly. So the question is, is I have an 87 5.0 mustang that has a b303 cam in it. I want to gey her to lope. It seems to surge instead of the loping. I've heard something about speed density. So could someone anyone help me with this. Explain all this to me. Or at least tell me some more about this please.
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Old 01-23-2012, 08:21 AM   #2
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Quote:
Originally Posted by Giles85
I need some help and everyone has been alot of help on here priorly. So the question is, is I have an 87 5.0 mustang that has a b303 cam in it. I want to gey her to lope. It seems to surge instead of the loping. I've heard something about speed density. So could someone anyone help me with this. Explain all this to me. Or at least tell me some more about this please.
You need to upgrade to mass air which can be done with a pin kit from Jegs, finding the correct harness that matches yours(with the exception of the new harness having the maf plug in), or I think even painless makes a wiring kit. Also will need a mass air computer and the correct maf for your car. Speed density cars don't like changes, they tend to run like crap if you throw cams, intakes or what have you at them. Good thing is they supposedly make more HP than the factory mass air cars. I've done the mass air upgrade before, I did the pin kit(which I really didn't like), then I finally found a mass air harness from an 89 stang for 50 bucks(huge score since those harness' normally bring big money). You could also get rid of the EFI all together and go carberated which then will probably make it lope.
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Old 01-23-2012, 08:26 AM   #3
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5.0 stang modification

Can any one give me some good ideas for bolt ons for 1987 5.0 mustang. Best bang for my buck. Its got a b303 cam 373 gears posi track its efi flowmaster x pipe dumps. That's all I really know of. Also its speed density. I would just like to add some hp without a charger or nitros. Any suggestions woud be appreciated. Thanks
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Old 01-23-2012, 08:33 AM   #4
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Re: b303 cam

Why is it better to go carb. That seems like iwould get expensive I doing so. So let me ask this. Say I didn't make the maf change. Is the larger cam doing anything for me as is? What kind of bolt ons could I go with. Are there advantages to sticking with the speed density?
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Old 01-23-2012, 08:51 AM   #5
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Full exhaust(Long Tubes). CAI, Throttle Body (70mm). Then you get into the heads and intakes. You can make a good 300+rwhp 302 with a nice very reliable set up.
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Old 01-23-2012, 09:09 AM   #6
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Re: 5.0 stang modification

What is my stock throttle body size. 60 mm. Running exhaust all the way back apposed to a dp gives more hp?
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Old 01-23-2012, 09:13 AM   #7
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Maybe a do a mass air , under drive pulleys , ac delete ,
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Old 01-23-2012, 09:18 AM   #8
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Re: 5.0 stang modification

Yea I have the under drive pulleys. My ac don't work. Is there a belt that matches up for bypassing the a/c?
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Old 01-23-2012, 09:30 AM   #9
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Re: 5.0 stang modification

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Originally Posted by Giles85 View Post
Can any one give me some good ideas for bolt ons for 1987 5.0 mustang. Best bang for my buck. Its got a b303 cam 373 gears posi track its efi flowmaster x pipe dumps. That's all I really know of. Also its speed density. I would just like to add some hp without a charger or nitros. Any suggestions woud be appreciated. Thanks
The first thing you need to do is to convert it to MAF.
You cannot do very many mods or the speed density is going to start acting up.
See the article link in the Useful Mustang Info sticky post.
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Old 01-23-2012, 09:35 AM   #10
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I bypassed the smog pump and am getting my ac delete . There's no specific belt just go to you're auto par store and try on the belts that's what I did . Also you can advance timing
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Old 01-23-2012, 09:38 AM   #11
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Re: b303 cam

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Originally Posted by Giles85 View Post
Why is it better to go carb. That seems like iwould get expensive I doing so. So let me ask this. Say I didn't make the maf change. Is the larger cam doing anything for me as is? What kind of bolt ons could I go with. Are there advantages to sticking with the speed density?


The first thing you need to do is to convert it to MAF.
You cannot do very many mods or the speed density is going to start acting up.
See the article link in the Useful Mustang Info sticky post.
There are no advantages that I'm aware of for staying with the SD system.


IMO it is NOT better to go to a carburetor.
While it may gain a few HP at the top end on a drag strip car, the hassles are just not worth it.
Idling, cold starting, gas mileage and tuning are four of the most prevalent reasons to not go carbureted. The EFI system does a much better job of controlling these aspects.
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Old 01-23-2012, 09:44 AM   #12
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Re: 5.0 stang modification

Is it complicated or very expensive to convert to master air flow?

---------- Post added at 09:44 AM ---------- Previous post was at 09:38 AM ----------

What kind of advantages is there to speeding up timing? And I can just remove the ac comp while bypassing right?
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Old 01-23-2012, 09:55 AM   #13
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Re: 5.0 stang modification

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Is it complicated or very expensive to convert to master air flow?

---------- Post added at 09:44 AM ---------- Previous post was at 09:38 AM ----------

What kind of advantages is there to speeding up timing? And I can just remove the ac comp while bypassing right?
Converting to Mass Air Flow can be as complicated and expensive as you want to make it or as easy and inexpensive as you want to make it. Read the article.


You can buy all new parts and make it expensive, or you can source the parts you need from a wrecked donor car or salvage yard and make it inexpensive.


Advancing the timing ignites the fuel/air mixture sooner for better response and a more complete burn of the mixture, however too much advance will cause detonation/pre-ignition which can kill your engine.
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Old 01-23-2012, 10:00 AM   #14
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Re: b303 cam

Is it complicated to do this conversion? Or expensive. I've seen fir the harness is about $50-60. Is there any other costs besides this one thing.
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Old 01-23-2012, 10:09 AM   #15
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Re: 5.0 stang modification

So speed it up only a couple degrees then? And what kind of power(hp) changes can I expect? Is it complicated to do the maf convert? U didn't really specify on this. This is something I will be doing. From what I've seen and read it is a definite advantage!! Would you agree?
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Old 01-23-2012, 10:18 AM   #16
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Re: b303 cam

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Is it complicated to do this conversion? Or expensive. I've seen fir the harness is about $50-60. Is there any other costs besides this one thing.
It is not necessarily cheap, but it's not overly expensive either.
It is necessary if you want to do much modding to your car.


Read the articles in the links below.


Why convert? - Mass Air vs Speed Density


How to convert? - Mass Air Conversion
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Old 01-23-2012, 10:28 AM   #17
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I could've not said it better. And as far as mass air goes if you're gonna go pull a harness of a junk yard you need to get a harness from an 89 it will be all plug and play do not get a harness from 90 and up due to airbags . I would also suggest to get 24 lb injectors and get a maf calibrated for 24 lb injectors. Also you will need a computer you want a "A9l" wich is manual but I've heard that an automatic will work aswell
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Old 01-23-2012, 10:31 AM   #18
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Re: b303 cam

Does an 87 ford aerostar van have maf and would the computer be interchangeable with my mustang
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Old 01-23-2012, 10:45 AM   #19
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Re: 5.0 stang modification

I have an 87 ford van. Would any of it work?
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Old 01-23-2012, 10:53 AM   #20
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Re: 5.0 stang modification

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1. So speed it up only a couple degrees then? 2. And what kind of power(hp) changes can I expect?
3. Is it complicated to do the maf convert?
U didn't really specify on this.
This is something I will be doing. From what I've seen and read it is a definite advantage!!
4. Would you agree?

1. Just wait until you have done the MAF conversion and you have the car running good. Most Mustangs respond best to 12-14 degrees of advance, some can tolerate as high as 16-18 degrees, but not many can. Note: Stock timing is 10 degrees BTDC, so you will be advancing it 2-4 degrees to get to the 12-14 degrees advance.


2. Minimal, it's no "miracle mod", it will increase the throttle response and give you a few HP.


3. For some it is very difficult, for others it is simple. It depends upon your level of knowledge and how well you can follow directions.


4. Yes, it is "THE" first mod I would do to any speed density Mustang.
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Old 01-23-2012, 10:59 AM   #21
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Re: b303 cam

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Does an 87 ford aerostar van have maf and would the computer be interchangeable with my mustang
I don't know and it has to be an 8 cylinder engine.
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Old 01-23-2012, 11:06 AM   #22
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fiveology has a conversion kit that shows step by step and gives everything for 350 for using stock injectors and has upgrades if u want
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Old 01-23-2012, 11:07 AM   #23
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Quote:
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I have an 87 ford van. Would any of it work?
To be honest I'm not sure if that would work hopefully someone else does and will give you some input
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Old 01-23-2012, 12:22 PM   #24
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Re: 5.0 stang modification

So I am literally about to go out and make this adjustment to my timing. Any suggestions before. Im really handy with engines just to put that out there. Just not so much with the electronics of things.

---------- Post added at 12:22 PM ---------- Previous post was at 12:21 PM ----------

Also I found a harness and computer. Can some one ascribe in some detail what it should look like
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Old 01-23-2012, 12:34 PM   #25
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Re: 5.0 stang modification

Ok, you have two posts going with basically the same content.I'm going to combine them, so if they look a bit out of place that's why.


No I don't think the van parts will work.
The components need to come from a V8 engine vehicle.


Buy a manual before you start tinkering with your timing to ensure you do it properly.
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