351 vs. 302 .. inch for inch - Page 2

Italian LX · 03-16-2006, 10:21 AM

Quote:

Originally Posted by The Sickness

I'm wondering if the extra weight of the 351 could be justified with simple bolt-on's

The extra power/torque is a good justification for doing the switch, but the big benefit is if you want high power levels (over 500hp) on a budget. This is the reason I went to a 351-based motor -- I'm too cheap to spend $2000 on an aftermarket block.

1sicklx · 03-16-2006, 10:53 AM

another thing that begs to be asked is would going carbed save you much $$ even if you have a EFI donor?

QWKSNKE · 03-16-2006, 10:55 AM

i doubt that there is much weight difference between the 2 engines (maybe 120 lbs, i doubt it though.

Eric's truck is good comparison with my car. When my 93 was stock with exhaust (no headers) it put down 248/291. Our engines are the same except for displacement. Same heads, similar intakes, his flows a few cfm more than the 93 cobra intake with the exxception of me having a MAF restriction (minimal) and his truck being speed density.

Of course, if his truck would have had a 5-speed instead of a slushbox, it may have put down closer to 260

Italian LX · 03-16-2006, 11:58 AM

Quote:

Originally Posted by The Sickness

another thing that begs to be asked is would going carbed save you much $$ even if you have a EFI donor?

As long as you have the donor, the price wouldn't be much different. Either way, you'll have to buy a different lower intake, and the cost of bigger injectors and a new MAF would be offset by having to buy the new carb.

1sicklx · 03-16-2006, 12:26 PM

Quote:

Originally Posted by Italian LX

and the cost of bigger injectors and a new MAF would be offset by having to buy the new carb.

true

475HP '03 cobra · 03-16-2006, 12:31 PM

now if you were to go to a 351 based motor could you still supercharge it or would there not be enough room left under the hood, or would there be other probs?

TheJeanyus · 03-16-2006, 12:45 PM

Quote:

Originally Posted by 475HP '03 cobra

now if you were to go to a 351 based motor could you still supercharge it or would there not be enough room left under the hood, or would there be other probs?

A 351 will require a taller hood, but a centrifugal supercharger shouldn't lead to hood clearance issues I wouldn't think.

1sicklx · 03-16-2006, 12:54 PM

Quote:

Originally Posted by TheJeanyus

A 351 will require a taller hood

not necessarily.

475HP '03 cobra · 03-16-2006, 02:06 PM

i didnt exactly mean hood clearnec i ment between the front of the enigine and the radiator

Italian LX · 03-16-2006, 02:57 PM

Quote:

Originally Posted by 475HP '03 cobra

i didnt exactly mean hood clearnec i ment between the front of the enigine and the radiator

The 351 block has the same depth as a 302; the main differences is a higher deck height and 3-inch mains.

03-16-2006, 10:53 AM	#12
1sicklx BamaMafia 4 Life Join Date: Feb 2005 Location: Lake View, AL Posts: 2,577	Re: 351 vs. 302 .. inch for inch another thing that begs to be asked is would going carbed save you much $$ even if you have a EFI donor? __________________ 1999 Ford F-150 Lariat

03-16-2006, 10:55 AM	#13
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: 351 vs. 302 .. inch for inch i doubt that there is much weight difference between the 2 engines (maybe 120 lbs, i doubt it though. Eric's truck is good comparison with my car. When my 93 was stock with exhaust (no headers) it put down 248/291. Our engines are the same except for displacement. Same heads, similar intakes, his flows a few cfm more than the 93 cobra intake with the exxception of me having a MAF restriction (minimal) and his truck being speed density. Of course, if his truck would have had a 5-speed instead of a slushbox, it may have put down closer to 260 __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-16-2006, 12:31 PM	#16
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	Re: 351 vs. 302 .. inch for inch now if you were to go to a 351 based motor could you still supercharge it or would there not be enough room left under the hood, or would there be other probs? __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.

03-16-2006, 02:06 PM	#19
475HP '03 cobra Senior Member Join Date: Sep 2005 Location: Tampa, Florida Posts: 157	Re: 351 vs. 302 .. inch for inch i didnt exactly mean hood clearnec i ment between the front of the enigine and the radiator __________________ bet you aint never seen a Shelby V8 ranger...heres a link which includes the one i had built http://photobucket.com/albums/c233/fordguy383/ some people have said mustangs have destroyed my life, i say they've made it worth living.