351 W Vs Modified 302

whiterod · 01-10-2002, 04:41 PM

guy's i have a dilema. My block has nearly 200,000 miles on it and i am thinking of the future. I am trying to decide what i want to do. I always wanted to put a 351W under the hood, but now i am thinking of keeping a 302 and just putting a little more on it. I have a few friends at the track that have supercharged 302's and juiced 302's and they run 11's and still get 20+ miles to the gallon. I guess my only doubt's of going with the 351 is having to buy new parts to fit the 351 like: lower intake, headers,.... and so on. And is the 351 as long lasting as the 302? What is the gas mileage comparison? Not that it makes a difference but if i can fly and get better gas mileage at the same time then i will take it. But i think the 351 under the hood of a fox is cool, because of the torque and so on. I know that back in the day cubic inches made the difference, but now days i don't think it is that necessary. what do yall think?

Unit 5302 · 01-10-2002, 08:54 PM

Keep the 302. The 351 is a stronger block, but I don't think you'll see as good of fuel economy from it, and to really get any more power out of a 351 vs a 302, you have to have the parts to support that power.

bosco · 01-11-2002, 12:14 PM

shoot, must be nice to get 20+ mpg, even high teens would be nice

BilLster · 01-11-2002, 03:25 PM

whats fuel economy ?????
go with the 351 it gives you room to grow also i would think my 393 with the boost turned down has to get better milage than a blower car turning the blower in traffic.

Unit 5302 · 01-11-2002, 09:32 PM

I would have to say that if you wish to make more than 450-500hp the 351 would be the better choice, but that would require forced induction on either engine. I find the 302 can run stride for stride with the 351 for a street combo.

01-10-2002, 04:41 PM	#1
whiterod Registered Member Join Date: Sep 2001 Location: zachary, la Posts: 73	351 W Vs Modified 302 guy's i have a dilema. My block has nearly 200,000 miles on it and i am thinking of the future. I am trying to decide what i want to do. I always wanted to put a 351W under the hood, but now i am thinking of keeping a 302 and just putting a little more on it. I have a few friends at the track that have supercharged 302's and juiced 302's and they run 11's and still get 20+ miles to the gallon. I guess my only doubt's of going with the 351 is having to buy new parts to fit the 351 like: lower intake, headers,.... and so on. And is the 351 as long lasting as the 302? What is the gas mileage comparison? Not that it makes a difference but if i can fly and get better gas mileage at the same time then i will take it. But i think the 351 under the hood of a fox is cool, because of the torque and so on. I know that back in the day cubic inches made the difference, but now days i don't think it is that necessary. what do yall think? __________________ GT-40X(58cc)heads, cobra upper&lower, FMS 65mm TB, 75mm Bullet, 24# injectors, 190 lph fuel pump, moroso cold air intake, BBK 1 5/8 equal length headers, flowmaster cat back, 1.7 cobra rockers, crane 2031, T5Z gear box, centerforce dual friction, mcleod bullet proof bellhousing, 3.55 gears, hurst billet shifter with over 193,000 miles. thanks to all who contributed

01-11-2002, 12:14 PM	#3
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	shoot, must be nice to get 20+ mpg, even high teens would be nice __________________ '87 coupe, 308, world product windsor jr. heads, comp cams 220@.050/.512 @110 deg., roller cam,crane full roller rockers, 4bbl 600cfm holly carb,1 inch spacer, wiend aluminum intake, pullies, msd distributer/ignition, 1 5/8 bbk shorties, off road h-pipe 2 chamber flows, 3.73 posi rear end, P.S.T control arms, steeda tri-ax shifter, t-5, auto meter guages, and more to come (hopefully )

01-11-2002, 03:25 PM	#4
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	whats fuel economy ????? go with the 351 it gives you room to grow also i would think my 393 with the boost turned down has to get better milage than a blower car turning the blower in traffic. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

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01-10-2002, 08:54 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Keep the 302. The 351 is a stronger block, but I don't think you'll see as good of fuel economy from it, and to really get any more power out of a 351 vs a 302, you have to have the parts to support that power.

01-11-2002, 09:32 PM	#5
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	I would have to say that if you wish to make more than 450-500hp the 351 would be the better choice, but that would require forced induction on either engine. I find the 302 can run stride for stride with the 351 for a street combo.