Join Date: Mar 2000
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Re: rebuild or swap?
Im gonna repeat what I said in an earlier Torque/HP discussion, last week.
A new generation V8 is gonna produce more Torque than you will be able to generate with any readily available in-line 6. You guys who are using the age old philosophy(which has been a good argument in the past) that the in line 6's will outpull a small block V8, are about 15 years behind current technology. V8s have come far in the last decade or so in their ability to produce great power curves.
Next point, in a well built Rock Crawler, you do not need monsterouse torque. With the gearing we are running, you could just about peddal the damn thing up most obstacles. You will more often than not, be ideling at no more than 1400 RPMs, and the demand from the power plant is no more than a well running 4 cylinder can easily generate. It is most improtant that you have a smooth usable power curve, with no eradic tendancies, in the lower RPM range, and the ability to maintane smooth power on any angle. Cool operating temperatures, and good oil pressure at low RPMs are also very important. A newer generation FI V8 easily fits the bill for these requirements. But a V8 also gives you the versatility, to run Sand and Mud at respectable, and even competetive, performance levels. Highway performance is awesome with a V8, and fuel economy will rival an in line 6 with a well tuned EFI version V8(I get about 12 mpg, on the road). Fuel economy on the trail, is excelent with a V8 and a sensible happy foot, I have been squeezing more trail miles per gallon with my 5.0 HO than the 4.0 HO's, I regularly run with, the reason being that the V8 rarely has to do more than idle all day long.
So, is a V8 a better Rock Crawling Engine than a strong inline 6?, I dont think so, and Ive ran both the 258, and 4.0 in my YJ. Is the 6 a better engine than the V8?..No!! The V8 and inline 6 are basicly a push(considering both are well tuned and performance spec'd propperly). Is the V8 more versatile? Yes!! And the V8 has no short commings, that I can think of, as compared to a 6(other than the increased potential of drivetrain breakage).
You Rock Crawlers who are still living in the early eighties, touting the advantages of the Ford 300 IL6, over the 302 CID, really need to upgrade your gear ratios, or look more closely at the performance numbers of modern day EFI V8's.
Wow, you can get a nice tan on your arms, from welding with no shirt on.