From what I'm understanding, if you were looking for an engine that could make some decent power, but also a light engine, a 302 would be the way to go.
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There is less than 100lbs difference between a 302 and 351W engine. It only takes 10HP to overcome 100lbs. Unless you are going to stroke a 302 to 347 (or something in-between), a 351 is going to have a natural advantage just because of the added stroke with the same bore. Where engine compartment space is at a premium, a physically smaller block makes some sense. Since most people already have a 302 if we are discussing the CV/GM platform, it is cheaper and easier to just bolt parts on the 302 platform for modest power gains. If you are rebuilding an engine and are upgrading parts, a 351W is an upgrade which can make some sense. If your long term goals are to make a pile of power, a 351W block is inherently stronger than a 302 block and you have the ability to get over 75 more cubes out of it. With a 302 you are absolutely maxed out at less cubes than a 351 starts with.Last edited by Mercracer; 06-18-2011, 06:44 AM. -
Originally posted by 86VickyLX View Post
yea as long as you put it in a light car..Give a man a fish and he will be fed for a day. Teach a man to fish and he will promptly forget that he once did not know, and proceed to call anyone who asks, a n00b and flame them on the boards for being stupid.Comment
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351's are fuel pigs tho........not quite as bad as the dodge 360 but still........with fuel being close to 4 bucks a gallon, performance can take a back seat
1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)
please be patient, rebuilding an empire!
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I was able to pull down 24mpg at 60+ with the 351 I had in my old '88 thunderbird. Around town it was closer to 13mpg...and that was with 3.73's. I'm concerned that it won't be close to that when I drop it in the CV though...more weight and the aerodynamics of a small house. Although the 'bird was 3835lbs with me in it...I don't think my tudor could weigh too much more than a couple hundred pounds more than that. Once you go 351, you can never go back.'85 CV coupe- 351W, T5-Z, FAST Ez-Efi, shorty headers, 2.5" duals with knock off flowmasters, 2.5" Impala tails, seriously worked GT-40 irons, Comp 265DEH cam, 1.7rr's, Mallory HyFire 6A, Taylor ThunderVolt 50 10.4mm wires, 75mm t/b, 3G alt swap, 140mph PI speedo, PI rear sway bar, '00 PI booster/MC, 95-97 front spindles, '99 front hub bearings/brakes, '92-'94 front upper control arms/ball-joints, 3.73's with rebuilt traction-lok, '09 PI rear disc swap, '96 Mustang GT wheels with 235/55R17's.Comment
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My two door was on the scale at 3520 lbs. I think you might have had the heaviest fox t-bird ever. As far as gas mileage I'm lucky to hit 9-10 mpg on 93 ethanol free.1984 CV tudor 351W, 4bbl, 5-speed best time in the 1/8 8.39 at 80 with 1.80 60ft time.
2006 P71, 1988 Bronco II, 1986 Baby LTD(5.0 & T5 swap in progress), 1976 16' Hobie Cat, 12' AquaFinn
http://www.cardomain.com/ride/2651997 UPDATED 20100826
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Since the CV isn't my toy car, I'm actually happy with the power that the 289 puts out. That doesn't change the fact that the 302 w/GT40Ps is still going in which = more power, but compared to a 5300lb truck my 3900# CV is pretty snappy.1992 CVLX. 5.0 HO/GT40P/T5/3.73/trak-lok with bolt ons. 02 front CVPI setup, rear HPP setup, CVPI shocks around, F250 radiator, e-fans, and the power of 3G. 15.92@89mph, 2.4 60', 4700' elevation (5500' DA) with 3.08 open rear and the old oil chugging 289. RIP.Comment
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A lot of things factored together for that...iron-headed 351W, every option(i hated the moonroof with a passion), a big box of tools in the back seat and a 265lb driver with steel toe boots and helmet. The car itself without the tools and my big ass was probably in the low 3500's. When I registered my tudor, I was suprised to see it listed as being 300lbs lighter than the 'bird on the title.Originally posted by Pesty351 View Post'85 CV coupe- 351W, T5-Z, FAST Ez-Efi, shorty headers, 2.5" duals with knock off flowmasters, 2.5" Impala tails, seriously worked GT-40 irons, Comp 265DEH cam, 1.7rr's, Mallory HyFire 6A, Taylor ThunderVolt 50 10.4mm wires, 75mm t/b, 3G alt swap, 140mph PI speedo, PI rear sway bar, '00 PI booster/MC, 95-97 front spindles, '99 front hub bearings/brakes, '92-'94 front upper control arms/ball-joints, 3.73's with rebuilt traction-lok, '09 PI rear disc swap, '96 Mustang GT wheels with 235/55R17's.Comment
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The fox chassis cars, particularly the bigger ones, are not as light as people might think. They are smaller than a Panther, but they have a lot of metal in them. Get a loaded one, and they're really porky. A Lincoln Mark VII weighs as much or more than a Vic does, depending on years.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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Yea, everybody always figures the marq to be about a 1000lbs heavier than it actually is. Panthers are surprisingly light for their size IMO.
'90 LX 5.0 mustang
Big plansComment
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