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302 limited upgrades, which?
#1
Hi,

I've got a 302 2v, single exhaust, standaard engine in my 73 mach1. (exept for electronic ignition)

It's ok, but missing a little punch (low compression smog engine).

As I don't want to put to much cash into the engine, what do you guys think would be the best upgrades to do, to get some extra horses.

Let's say if I want to spend $800-$1200 what would be the best combo investment? dual exhaust with headers and an performer intake and carb?

get heads from an earlier 302/351, 2 or 4v.

Maybe some other simple tips that are often forgotten about?

73 Mach1 302 2v
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#2
Cam, headers, intake, carb, and exhaust. I put a set of 69 model 351w 4v heads on my 91 5.0 with no mods required. That car ran really well. Give com cams a call and tell them what you want and they will guide you along.
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#3
Exellant advise. You can get one hell of a lot of ponies out of a 302. Especially if you build it around the cam.

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.
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#4
Put a deeper (higher numerically) gear in it. Get the distributor curve right (34-36 total, all in by 2800 rpm). Dual exhaust. If anything is left, a 2V autolite carb from a big block (1.14 or 1.23 throttle bores) with a 1 inch open spacer. You might be surprised. Chuck
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#5
Tnfastbk;31096 Wrote:Cam, headers, intake, carb, and exhaust. I put a set of 69 model 351w 4v heads on my 91 5.0 with no mods required. That car ran really well. Give com cams a call and tell them what you want and they will guide you along.

even without other heads, I might be able to squize some extre hp out of this low compression engine?

Sounds good.

Just to make sure, so I won't search wrong parts, what would be the best carb, intake, cam, exhaust to go on the low comp. 302?

Edelbrock Performer? Weiand Street Warrior? What carb or cam?

Good tip on the gearing, might see into that too.

73 Mach1 302 2v
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#6
A good place to start

http://www.compcams.com/DefaultWide.aspx...eSupport=1
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#7
One of the first things you should do is make sure you have a solid foundation(engine).Inspect it well! Run a compression check etc.....If it all is good go for it! You will have no trouble making good power from the 302..You can really wake one up with just bolt on parts! In my experiance with the 289 / 302's the first thing would be a really good exhaust system starting with full length headers,at least a 2.5 exhaust and good free flowing mufflers.Make sure you have a good electronic ignition,good coil, wires etc.....the next would be a good dual plane intake.My favorite for the small block was the factory Cobra / Edelbrock F4B dual plane manifolds.I have used the steert master but I don't recall it responding like the Ford designed intake. The Edelbrock torquer was a good one also. Get a good carb in the 600CFM range,don't go to small or too large! I have had the bext luck with the Holley 600 and Edelbrock 600.If you go to a new cam use a cam like the comp cams 268H high energy or one of the extream energy.When you use a cam you are going to want a good set of springs.The springs will require you to have you rocker studs pinned or drilled for screw in studs.The factory studs will eventually pull out( ask me how I know!) A real good double roller time set is also a good Idea. You are lucky in that now days you can buy a good set of aftermarket heads that already have the mods like screw in studs good springs,stainless valves hardened valve seats etc....for about the same as modifing your old stuff.Just stick with the smaller valves 1.90 intake / 1.60 exhaust for good street drivability.Like Chuck said,don't forget the gears and torque converter.Those really wake a car up! Good luck!

[Image: 16kuyc0.jpg]
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#8
In my opinion, "FastE" is right on the money, in the exact order that he mentioned the possible upgrades.

Work the exhaust first, i.e. headers, mufflers and a true dual system...that will take care of the $800.

BT

Do the RIGHT thing.
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#9
Six months ago I chucked a new 575cfm Holley Street Avenger carby and 4bbl manifold on my stock 302 to replace the 2 bbl carb and manifold that was on it. I noticed an instant improvement in horsepower, mainly in the higher rev ranges where the 2 bbl had been gasping.

Brett
[Image: stangprofile3.jpg]
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#10
VintageSpeed;31095 Wrote:Hi,

I've got a 302 2v, single exhaust, standaard engine in my 73 mach1. (exept for electronic ignition)

It's ok, but missing a little punch (low compression smog engine).

As I don't want to put to much cash into the engine, what do you guys think would be the best upgrades to do, to get some extra horses.

Let's say if I want to spend $800-$1200 what would be the best combo investment? dual exhaust with headers and an performer intake and carb?

get heads from an earlier 302/351, 2 or 4v.

Maybe some other simple tips that are often forgotten about?

VintageSpeed,
I'm currently doing a 73 with the same engine and exhaust system. What I've decided to do is build this car for fuel economy. Keeping the stock 2bbl carb and ditching the single exhaust for a dual with Flowmasters. Also ordered a Ram Air kit to hide the 2bbl and make it look like it's got something something under there Wink This will be the "all bark, no bite" daily driver Big Grin
Even with the stock setup, it had enough punch to spin the tires. If you're looking to spank a well tuned Honda, then yes, do all the mods suggested by the others, but if not, then I recommend doing a build like mine. Have fun with your build!
DJ
VintageSpeed;31132 Wrote:
Tnfastbk;31096 Wrote:Cam, headers, intake, carb, and exhaust. I put a set of 69 model 351w 4v heads on my 91 5.0 with no mods required. That car ran really well. Give com cams a call and tell them what you want and they will guide you along.

even without other heads, I might be able to squize some extre hp out of this low compression engine?

Sounds good.

Just to make sure, so I won't search wrong parts, what would be the best carb, intake, cam, exhaust to go on the low comp. 302?

Edelbrock Performer? Weiand Street Warrior? What carb or cam?

Good tip on the gearing, might see into that too.
Well, you can throw out the $800-$1200 budget.. For me, it cost that much just to do gearing Rolleyes
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