N20jeep

99

N20jeep

what dyno results? id like to see that

jmm0122

97-99
00-01
96 was ok.

rikinwyoming

I have had three,,, 88, 91, and now a 99,,,, the 99 is the best of what I have owned, and by what I can see the 99 is best all around

sgtskid

x2

bigjim350

I love my 92. Anything 92 and newer should be good. 92 was the first year of HO and Non-disco D30. I like the older ones mainly cause they don't have all the complications of obdII. Sure the newer ones have a little more power, and the fancy interior. Guess thats fine if your a mall crawler. Me I like to wheel mine, just as much mud on the inside as the outside. But to be honest everybody is gonna say the best years are within the range of the years they own.

freegdr

x2 and and just turning 200,000 and dont eat my cash merry christmas

no rdplz

95-96's have the weaker 27 spline 8.25's and a more restrictive intake manifold. 97-98's have the 29 spline 8.25 and the updated exterior/interior, but still have the intake manifold from 95-96 XJ's. 99's have the 29 spline 8.25, the less restrictive intake manifold, and of course the styling updates. The 00-01's have all the 99 stuff, plus a coil ignition system, but they have the dreaded 0331 head which is VERY susceptible to cracking if the engine overheats. They also have the low pinion Dana 30 which is a downfall. Personally, I'd go with a 99.

alloutperform

97-99..had all three no difference that i could tell currently have 98

Tural

97-99. you can pick up a new style intake manifold for near nothing.

Mista Slave

93'

djb383

Over at jpmagazine, the article is titled myth busting. They say the 98 lost 5hp with the intake swap. If the '99 up intake was a power adder, why didn't Jeep rate '99 up higher? They didn't, stayed 190.

N20jeep

i wish i could find the article that has the actual swap. because when they were doing bolt ons and dyno testing on "project Mileage Master"(the one they used with the myth) they didnt include the intake manifold in that article.

i can understand the no gain, but the decrease in power doesnt seem right. maybe they used the 99+ injectors instead of keeping the originals? maybe they changed something with the throttle body? dont know, but the point is i wish they had more info on when they did the swap. because there are alot of variables involved in dyno testing something like that

id also love to see the graph. im not to concerned with peak HP numbers, as you spend maybe 3% of driving in the peak hp range(some even less than that). the midrange and lowrange effects are more important.

edit: i also think the mallcrawlin thread is nonsense. way to many problems with the way they did the swap and testing

N20jeep

no true, all of my personal XJs have been between 87-93.

as far as axles, transmissions, engine management, interior, ect...the 99 comes out on top in my book for combination of options that they came with.

alloutperform

my recently aquired 95 seems to have a SH&^ LOAD more power then my 98.....and as far as the 99+ manifold N20 i can only guess that it's too open and the velocity of air flow is slowed down it may work better high end rpm