Go Back   Ford Mustang Forums > Mustang > Classic Mustang > Classic Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

Classic Forums | Classic Talk | Classic Tech | Classic Pictures | Introductions | Mustang Tech | Mustang Lounge 


Reply   Post New Thread
Unread 04-07-2010   #1 (permalink)
ZakBradshaw is offline Apprentice


Joined: Apr 2010
Posts: 242 Threads: 76
 ZakBradshaw's Country Flag
Fort Worth   Texas
ZakBradshaw is on a distinguished road
Default How Do I Get 300 HP Out Of My 73 302?

I just bought a 1973 Mustang base model Mustang that has the Mach 1 ram air hood, and the Mach 1 stripe kit. It has a 302, that I'm not sure if it is the original motor. I was hoping someone could tell me how to get around 300 horsepower out of this motor... As far as I can tell, here's what it has...

Flowmaster Straight Pipe Exhaust
Headers
Edelbrock Torker II Intake
Edelbrock 4 Barrel Carburetor
Accel Super Cell Ignition Coil
...This is all I can see...

What's next, crank, cam...and how much? Oh, I don't have the money for a complete rebuild, and I can do most of the work myself. Thanks, Zak.
ZakBradshaw is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 04-07-2010   #2 (permalink)
rex1965 is online now MACH I Member

Classic Member


Joined: Jan 2010
Posts: 3,337 Threads: 3
 rex1965's Country Flag  View rex1965's 2 photos
Pittsburg   Kansas
rex1965 is on a distinguished road
Default

It looks like you have a pretty good start, if it has a stock camshaft, you need a camshaft change, if you have stock heads the valve springs won't let you go much past 5500 rpm, so your going to have to make your power below that or change some valve springs and components. If you decide to change the camshaft, it may be time to overhaul the motor, you'll have to check several things to make that determination. Good Luck.
rex1965 is online now  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #3 (permalink)
98SVTSnake is offline Made Member

4.6L Member


Joined: Feb 2009
Posts: 297 Threads: 24
 98SVTSnake's Country Flag  View 98SVTSnake's 10 photos
Eugene   Oregon
98SVTSnake is on a distinguished road
Default

Quote:
Originally Posted by ZakBradshaw View Post
I just bought a 1973 Mustang base model Mustang that has the Mach 1 ram air hood, and the Mach 1 stripe kit. It has a 302, that I'm not sure if it is the original motor. I was hoping someone could tell me how to get around 300 horsepower out of this motor... As far as I can tell, here's what it has...

Flowmaster Straight Pipe Exhaust
Headers
Edelbrock Torker II Intake
Edelbrock 4 Barrel Carburetor
Accel Super Cell Ignition Coil
...This is all I can see...

What's next, crank, cam...and how much? Oh, I don't have the money for a complete rebuild, and I can do most of the work myself. Thanks, Zak.
I'm guessing you mean 300 at the crank. 300 to the tires is going to take some work and money. More money more power. The torker 2 intake is a little overkill. I would put a performer rpm on it better throttle responce. carb is good if its a 600cfm. sounds like its pretty stock. cam I would go with a comp 260. if you have the money a good set of heads but if you go that rought do a rebuild. I takes some money and planning to build a motor right. I have a 289 in my 67 Cougar XR7 that's 30 over and its making over 400 horse at the crank. but I have some money in it aluminum heads, intake, high compression pistons. comp 280 cam. To put it simple you need to make all the parts work together not just one thing is going to make your goal. get a plan on what you want from your motor and stick to it. hope that helps you a little.
good luck
__________________
1998 Ford SVT Mustang Cobra
1967 Mercury Cougar XR7
1997 Ford F250 4X4 Supercab PowerStroke
98SVTSnake is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #4 (permalink)
ZakBradshaw is offline Apprentice


Joined: Apr 2010
Posts: 242 Threads: 76
 ZakBradshaw's Country Flag
Fort Worth   Texas
ZakBradshaw is on a distinguished road
Default

Thanks guys. I don't want to do a rebuild, as this motor runs great...I was just hoping for more power... And yes, lol...at the crank. Like I said, I just got the car, so I'm not exactly sure about internals, but if I had to guess, I'd say it's about all stock. Zak.
ZakBradshaw is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #5 (permalink)
gt350ed is offline Rookie

Classic Member


Joined: Feb 2010
Posts: 20 Threads: 6
 gt350ed's Country Flag
Apple Valley   California
gt350ed is on a distinguished road
Default

As you may be aware, the 66 Shelby GT-350 street version came with 306 H.P. The engine was a 289. It was not stroked, nor did it have major head work. It started as a 289 Hi-Po motor and was enhanced from there using a cam, carb and tri-y headers.

I realize that we measure horsepower differently these days, but nevertheless, I think you get the idea. A 302 is not a major departure from a 289. In addition to the items stated, compression ratio will be a factor. The Shelby 289 had a 10.5-to-1 ratio I believe; maybe 9.5-to-1. You can check it out.

In this day and age, assuming a healthy bottom end, a good set of breathable heads, correct carburation, a cam on the plus (+) side of "mild", a good set of headers and dual point or electronic igntion, combined with the correct compression ratio should get you there. It's almost ALL bolt-on.
__________________
Ed
In 1967, I was an original owner of a new 1966 GT350. I paid $4695. It was totaled in an accident in 1971. I still have the steering wheel.

Current project is a 1966 Fastback 289 that I have owned for many years.
gt350ed is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #6 (permalink)
ZakBradshaw is offline Apprentice


Joined: Apr 2010
Posts: 242 Threads: 76
 ZakBradshaw's Country Flag
Fort Worth   Texas
ZakBradshaw is on a distinguished road
Default

Great!!! That's exactly what I needed to know, now any ideas on setups that would go along with what I've already got? What would be the best thing to replace first? Zak.
ZakBradshaw is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #7 (permalink)
Boomyal is offline PONY Member


Joined: Sep 2009
Posts: 918 Threads: 65
 Boomyal's Country Flag
Vancouver   Washington
Boomyal is on a distinguished road
Default

If your motor is original and basically stock (internally) it was rated at a measly 136-141 hp @ 8.5:1 compression and only came with a 2 bbl carb.

At minimum I would change the cam (as stated above), get rid of that torker intake. It is only capable of making power above where you will run and it hurts the bottom end power. It a single plane intake (bad, bad. bad) and is rated to operate between 2,500-6,500 rpm. It is killing your bottom end grunt.

Then you need to get a set of GT40 heads and gasket match them. (minor porting) They flow nite and day better than the smog era head that came with you car. But what you really need to do first is to find out which heads are on the motor now. 1973 marked the first year that Ford super detuned the 302. Finding out what heads you have will allow you to find the combustion chamber size and compare it the size of the GT40 chambers. If the GT40 chambers are smaller, that would help you anemic compression ratio as well a give you better flow.

You said you have headers but I wasn't clear if you have dual exhaust. If not, you need them.

All these things you can do with the motor in the car. The only real drawback is that you would retain the probably dished 8.5:1 pistons. Ideally, you would want at least 9.5:1, at which you could still run unleaded regular.
Boomyal is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #8 (permalink)
ZakBradshaw is offline Apprentice


Joined: Apr 2010
Posts: 242 Threads: 76
 ZakBradshaw's Country Flag
Fort Worth   Texas
ZakBradshaw is on a distinguished road
Default

The exhaust are true Flowmaster duals...
ZakBradshaw is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-07-2010   #9 (permalink)
Palerider94 is offline Apprentice


Joined: Feb 2010
Posts: 239 Threads: 2
 Palerider94's Country Flag
Valparaiso   Indiana
Palerider94 is on a distinguished road
Default

I'd look at the edelbrock cam/head/intake packages. Take a lot of the guesswork out. They claim over 300hp with their set ups.
Palerider94 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 04-08-2010   #10 (permalink)
andrewmp6 is offline Top Dog


Joined: Oct 2007
Posts: 5,991 Threads: 5
 andrewmp6's Country Flag
Louisville   Kentucky
andrewmp6 is on a distinguished road
Default

Heads cam and higher compression will get you 300whp but power=money.
andrewmp6 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164