Go Back   MustangForums.com > Ford Mustang Tech > Classic Mustangs (Tech)
Sign in using an external account
Register Forgot Password?
Search


Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


302 vs 351w vs EFI ?

Reply
 
 
 
 
Thread Tools Search this Thread
Old 08-25-2007, 05:17 PM   #1
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default 302 vs 351w vs EFI ?

Im having so many second thoughts , Which would you recommend ? Im only looking for about 400hp / 425tq ...

302 stroked 347 ?

351 stroked 408?

302 EFI?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 05:20 PM   #2
rmodel65
Yukon Cornelius
 
rmodel65's Avatar
 
Join Date: Oct 2005
Vehicle: 1965, ford, mustang fastback
Location: deep in the heart of dixie GEORGIA
Posts: 11,662
Send a message via AIM to rmodel65 Send a message via MSN to rmodel65 Send a message via Yahoo to rmodel65
Default RE: 302 vs 351w vs EFI ?

depends on the budget 400hp can be had from a 302 pretty easily
rmodel65 is offline   Reply With Quote
Old 08-25-2007, 05:28 PM   #3
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

about a 3 k budget .
__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 05:39 PM   #4
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,415
Default RE: 302 vs 351w vs EFI ?

On a $3k budget, a carb'd 351 or 351 stroker(373, 392, 408). You're not gonna get 400hp out of a 302 on $3k. I got about 370hp outta mine that's STREETABLE(the key if you drive your's every day) and did everything but the machining myself, and it cost me over $4k, but it's also built pretty stout. With a good EFI setup it may put out 400+hp(since I'm using a smaller carb/intake to keep it streetable, with EFI I can let it breathe better and still drive well). A carb'd 351 stroker could make 400hp rather easily for not a lot of money, but mileage will suck unless you have overdrive and good gearing
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 08-25-2007, 05:58 PM   #5
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

Are you talking about an EFI 351?

I actually do have to say i care about mileage because im only 16 . So i dont have that much money .

And Its a street car ,Im not a dragstrip Cali kid.

I think 400 is too much of a stretch for me , But who knows .

what kind of times am i looking at with this kinda of a set up , I was thinking about going 302 for the mileage since the 351 is alot bigger ,

But i dont want to be shown up on the streets all the time , So my guess is 351

I feel really ... dfihshw0awjigtaeioruth9aeruthe359uahe

About this , What would you recommend in my situation?

I was planning on going T-5 speed with OD . MAnual Transmission
__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:03 PM   #6
gothand
5th Gear Member
 
gothand's Avatar
 
Join Date: Nov 2006
Vehicle: 1965 2+2 & 2011 GT
Location: North Fulton, GA
Posts: 2,287
Default RE: 302 vs 351w vs EFI ?

Quote:
ORIGINAL: 67mustang302

On a $3k budget, a carb'd 351 or 351 stroker(373, 392, 408). You're not gonna get 400hp out of a 302 on $3k. I got about 370hp outta mine that's STREETABLE(the key if you drive your's every day)
Ding ding ding! 400hp doesn't mean diddly to most of us if it is all on the upper end and needs 1000+ rpm to hold an idle. I'd take a 300hp streetable motor any day over a 400hp that belongs on the track.
__________________
'65 2+2 EFI and 2011 GT
gothand is offline   Reply With Quote
Old 08-25-2007, 06:06 PM   #7
Mr. Classic EFI
2nd Gear Member
 
Join Date: Aug 2007
Location: L A 32548
Posts: 316
Default RE: 302 vs 351w vs EFI ?

The 302 wheather EFI or carbed, mated with a T-5Z, and properly geared, (remember your car is about 500lb lighter than a fox body), will give you all you can handle on the street.
__________________
65 2+2, EFI 5.0, AODE-W, Unisteer Power R&P, & some other stuff too!
Mr. Classic EFI is offline   Reply With Quote
Old 08-25-2007, 06:08 PM   #8
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

So are you saying im in over my head ? And that i should stick to 300's ?

If anywhere im happy with anything past 350 hp maybe 370

And torque as long as im holding up about 380 or so .

that should make for a good A$$ hauler . shouldnt i be doing like 12's with that ?

I went off an ET calc , But 11.5 seems too fast for that much power so im saying around 12 is right ?

So the argument still stands ... 302 EFI ? 347 stroker ? 351?
__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:11 PM   #9
Jakaru
2nd Gear Member
 
Join Date: May 2006
Location:
Posts: 207
Default RE: 302 vs 351w vs EFI ?

I think you have a conflict of interest. If you want milage and decent hp grab a 302 if you want hp and raw strength go bigger. Mines a daily drive and the speed limits on most streets are 45 or lower and the freeway is 65. 302 is all I want.
__________________

65 Coupe 302 and mostly stock going through a resto/mod.
Poppy red paint and white vinyle interior.
Jakaru is offline   Reply With Quote
Old 08-25-2007, 06:12 PM   #10
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,415
Default RE: 302 vs 351w vs EFI ?

Quote:
ORIGINAL: gothand

Quote:
ORIGINAL: 67mustang302

On a $3k budget, a carb'd 351 or 351 stroker(373, 392, 408). You're not gonna get 400hp out of a 302 on $3k. I got about 370hp outta mine that's STREETABLE(the key if you drive your's every day)
Ding ding ding! 400hp doesn't mean diddly to most of us if it is all on the upper end and needs 1000+ rpm to hold an idle. I'd take a 300hp streetable motor any day over a 400hp that belongs on the track.
Absolutely. A lot of people like the idea of a 400hp 302 that they can drive, and it seems fun at first. But after the novelty wears off in 3-4months, you start to get REALLY tired of driving a cantankerous beast. 400hp from a 302 can be done in a streetable package, but it's neither cheap nor easy. That's why cubes are good for budget street builds, it's easier to get streetable power.


As far as mileage in a 351...with a modest sized carb/intake combo and good heads and a roller cam, you can get 400hp and have decent mileage, especially with a 5spd and the right diff gear. But you also have to take into account chassis and suspension. Can your car handle 400hp? You need a good clutch, a decent trans, good u joints, a good diferential, preferably a locker or LSD of some sort, or you'll just fry 1 tire all the time, and suspension that'll hold it all without wheel hopping, breaking or otherwise just not putting the power down. There's more to power than just the engine
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 08-25-2007, 06:14 PM   #11
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

Hmm i see , Cuz then when you think of It , How ofter are you going to go faster than about 60? on a street drag ? .

Btw, Anyone know how to calculate some 0-60 times on these cars ?

ok so lets be hypothetical , We knocked out the 351 and now we have either 302 EFI or 302 carb?

Is it worth the extra work ?

I seem to like the looks of the carb'd car , but the fuel efficiency and increase in selection like PCU power mods intrigues me on the EFI .

__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:18 PM   #12
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

when you say decent mileage , I cant help but ask for ###'s

__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:21 PM   #13
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,415
Default RE: 302 vs 351w vs EFI ?

Quote:
ORIGINAL: takeoutexodus

So are you saying im in over my head ? And that i should stick to 300's ?

If anywhere im happy with anything past 350 hp maybe 370

And torque as long as im holding up about 380 or so .

that should make for a good A$$ hauler . shouldnt i be doing like 12's with that ?

I went off an ET calc , But 11.5 seems too fast for that much power so im saying around 12 is right ?

So the argument still stands ... 302 EFI ? 347 stroker ? 351?
Just build a carb'd 302 with good heads, a roller cam and a nice carb/intake combo, it'll run nice, make plenty of torque and with good gearing get decent mileage and be quick. Build a badass motor later, or put a supercharger on it if you want more power down the road. Don't try to do everything all at once.

As far as 12's, my carhas the power to run12's, but with the gearing I have right now it overloads the clutch and it slips a bit outta the hole, so it can't pull better than 2.1xx 60's. With the right gearing and a 5spd it'd go mid-high 12's on street tires, with LESS than 400hp AND it drives really well on the street and gets good milage. Look at my sig, there's more to going fast than just horsepower.

You could also build a mild 351 and have a bit more power but a bit less mileage. Again, if you go with a 5 speed and decent gearing, like a 3.55, then it'll still get good milage. Just use a modest cam, decent little heads and a mild carb with a low rise dual plane intake. A 600-650cfm carb would do it. As long as you drive easy the mileage will be ok.
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 08-25-2007, 06:24 PM   #14
Jakaru
2nd Gear Member
 
Join Date: May 2006
Location:
Posts: 207
Default RE: 302 vs 351w vs EFI ?

If I had the money I think I'd go with a 302 efi but with an engine with less than 20k miles I can't justify it to the wife. You'll have to ask around for numbers and I'm sure someone would give them. I think you can get decent milage and decent power but 3k doesn't seem quite right for an efi swap and new gears and new transmission to get you mpg and power.
__________________

65 Coupe 302 and mostly stock going through a resto/mod.
Poppy red paint and white vinyle interior.
Jakaru is offline   Reply With Quote
Old 08-25-2007, 06:28 PM   #15
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,415
Default RE: 302 vs 351w vs EFI ?

Mileage depends on engine build, gearing and how you drive. I generally get like 15 city and 20-22 highway, but I don't drive like an old lady either and only have a 4 speed Toploader. I personally like 5.0's because they take a whipping, and you can go EFI + supercharger to get monster power, but the small displacement as far as V8's go makes for decent mileage. With EFI you can get 25mpg highway without too much trouble, as long as you build the engine properly(ie no monster cam and monster heads etc).
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 08-25-2007, 06:31 PM   #16
gothand
5th Gear Member
 
gothand's Avatar
 
Join Date: Nov 2006
Vehicle: 1965 2+2 & 2011 GT
Location: North Fulton, GA
Posts: 2,287
Default RE: 302 vs 351w vs EFI ?

There's too much damn common sense going on in this thread. Kumbaya!
__________________
'65 2+2 EFI and 2011 GT
gothand is offline   Reply With Quote
Old 08-25-2007, 06:32 PM   #17
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

No , 3k was just for the Engine .

I was talking to JamesW and he said he did his whole swap for about 2k all around for 302 EFI including tranny and fuel cell etc. .

I was like daaaang! ..

So i was thinking putting around high 2k to 3k tops to my engine .

My guess for best mileage plus power is 347 EFI ? But i hear those things break really easily .

I plan on going to a junker and getting a 90-92 fox HO engine if i do go EFI .

im going 9 inch rear ,

And the whole project . I dont plan on getting this car rolling in a long time .

Its going to be done right the first time!

What kind of hp and tq should i be pumping with some new internals (stroker) and new heads.

Then comes the rest.


__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:39 PM   #18
takeoutexodus
2nd Gear Member
 
Join Date: May 2007
Location:
Posts: 484
Default RE: 302 vs 351w vs EFI ?

Ok , So now that i realize i was way over my head .

My mind is on around 350 hp 375 tq .

Which seems easily do able .

Mr. EFI ? What do think about a Stroked EFI ?

Do I need to stroke for the 350 hp ?


__________________
takeoutexodus is offline   Reply With Quote
Old 08-25-2007, 06:42 PM   #19
my77stang
6th Gear Member
 
my77stang's Avatar
 
Join Date: Dec 2006
Vehicle: 77 II, 06 GT
Location: Citrus County, FL
Posts: 8,007
Send a message via AIM to my77stang Send a message via MSN to my77stang Send a message via Yahoo to my77stang
Default RE: 302 vs 351w vs EFI ?

what about a 289 with an EFI setup from a 302? you'd get killer milage, and it would be peppy as hell for driving around with nothing more than a slightly larger than stock cam, and some GT40 / GT40P heads.
__________________
“‎Some of my finest hours have been spent on my back veranda, smoking hemp and observing as far as my eye can see.” - Thomas Jefferson
my77stang is offline   Reply With Quote
Old 08-25-2007, 06:45 PM   #20
Mr. Classic EFI
2nd Gear Member
 
Join Date: Aug 2007
Location: L A 32548
Posts: 316
Default RE: 302 vs 351w vs EFI ?

As far as EFI, I dont think it'll ever pay for itself, but to give an example, on a recent trip to Dallas, from the Florida panhandle & back, I was travling with 2 other V-8 65-66's, both carbed. My fuel bill difference was enough to pay for one of the nights in the Hotel. That trip I got a best of 28mpg (steady 65mph) with an average of 22-23 at Interstate speeds75-85. Kinda nice.
For you it'll prolly be easier to go with a good 600cfm carb & maybe an air gap intake. Then later if the budget allows & you decide you want it, do the EFI conversion.
I did my EFI just to please my self, just because I wanted to. Not because I really expected to reap huge fuel savings, though gas is getting rather pricey.That said, now that its done, do I like it?? Oh Hell Yeah.
__________________
65 2+2, EFI 5.0, AODE-W, Unisteer Power R&P, & some other stuff too!
Mr. Classic EFI is offline   Reply With Quote
Old 08-25-2007, 06:45 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
300, 302, 351, 351w, 375, camshaft, carb, efi, ford, hp, intake, procharger, sbf, selection, work

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
289 vs 351w Adrenolin Classic Mustangs (Tech) 21 07-04-2008 12:04 PM
347 vs 351W want_66fastback Classic Mustangs (Tech) 16 05-17-2006 11:34 AM
302 vs 351 vs 390 goods and bads? js127227 Classic Mustangs (Tech) 27 02-08-2006 02:42 AM

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 05:07 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup