Built 2.5L

[pokeyYJ]

Anyone ever built one up? Are there performance products for the Jeep 2.5L? What can be done to increase low end torque output?

 

[cruiseroutfit]

Originally posted by pokeyYJ
Anyone ever built one up? Are there performance products for the Jeep 2.5L? What can be done to increase low end torque output?

Dude do a search (on the www or POR)... there are alot of performance ugrades for the 2.5... just start lookin....

 

[Caleb]

there is just about anything you want for the 2.5L but you are throwing money at a lost cause...By the time you are getting respectable power out of it you will have spent more than it would have cost to just swap a different motor in...Supercharger will give you the most power increae but you are talking $3-$4K atleast...

 

[N-Smooth]

2.5L is a killer motor if you want a total rock buggy, but if you want a state street cruiser you are screwed with the 2.5. besides, 4 cylinders and v6's are becoming more and more popular in rock-buggies.

it's a good motor because:
it's a light-weight 4 cyl
it doesn't have oil blowby like the 4.0
you only have to replace 4 spark plugs!
it has just enough torque and is great if you run low gears
it still moves 31" tires on 3 cylinders (trust me i know)
4 cyl manuals come with 4.10's and will out-wheel a 4.0 (trust me i know)

it's a bad motor because:
they are pretty slow!
motor mounts are not readily available
did i mention they are slow!?!


i can't think of anything else but this should get some interesting replies.
I LOVE MY 2.5 AND I SWEAR I AM NOT GAY!

 

[crimsonride]

What's the point? It's like trying to build up a Suzuki, no matter what you do it's still going to be little.

 

[N-Smooth]

man, suzukis are bad! i have a sami. they are awesome, that little motor is indestructable! if you are into mudding and all that crap then you want a big-block but for rock-crawling all you need is a 4 cyl.
this is my opinion but i know that a lot of people agree with me, but then again a lot of people might not agree. its cool, i love 4 cyls.
go to spidertrax or calmini and check out their samis. samis can do so good! they are killer!!!!

-nate

 

[bobdog]

Originally posted by xj_punk
man, suzukis are bad! i have a sami. they are awesome, that little motor is indestructable! if you are into mudding and all that crap then you want a big-block but for rock-crawling all you need is a 4 cyl.
this is my opinion but i know that a lot of people agree with me, but then again a lot of people might not agree. its cool, i love 4 cyls.
go to spidertrax or calmini and check out their samis. samis can do so good! they are killer!!!!

-nate

The zuk motors are not indestructable. The crank timingchain sproket keyway setup is not the greatest. They should have made it a tapered deal then the crank in my samurai would not be ruined. And rebuild zuk motors cost more than brand new chevt 350s imagine that.

Anyway back to the topic nobody is swaping out V8s or I6s for fours are they pokey. Gear change will give a seat of the pants improvement, any mod to the engine will be burning $.

 

[N-Smooth]

whatever you say.
i put the rustys air tube on my 2.5 with the k&n filter (the huge one). it is basically just like half an intake. and i felt a definite improvement in 2nd gear. you know how most cars have kind of a lag in 2nd gear, well this got rid of that. and it sounds sweeet. i also put flowmaster 40 series cat back exhaust and that improved it a ton too. that also sounds sweeeet. everybody thinks i have a smallblock cause it is so burly sounding, but i am very quick to tell them i have a 4 cyl. 4 cyl pride! i also added a rustys tb spacer but i have not driven it with that installed yet.

a small motor makes your drivetrain live longer!
-nate

 

[bobdog]

Originally posted by xj_punk
whatever you say.
i put the rustys air tube on my 2.5 with the k&n filter (the huge one). it is basically just like half an intake. and i felt a definite improvement in 2nd gear. you know how most cars have kind of a lag in 2nd gear, well this got rid of that. and it sounds sweeet. i also put flowmaster 40 series cat back exhaust and that improved it a ton too. that also sounds sweeeet. everybody thinks i have a smallblock cause it is so burly sounding, but i am very quick to tell them i have a 4 cyl. 4 cyl pride! i also added a rustys tb spacer but i have not driven it with that installed yet.

a small motor makes your drivetrain live longer!
-nate

Cool. Wanna race for titles?

 

[N-Smooth]

i hope you mean slow race! my crawl ratio is 76... thats decent with a 4 to 1 teralow and 5.38 diff gears...

nate

 

[Hickey]

My crawl ratio is 84, and my 6 year old can drive it better than you.

 

[Hickey]

Uh oh, herre comes Shawn.......

 

[bobdog]

I also have 76 to 1 crawl ratio(with 4.56s and no special gears in the T/C). I think that my 8 cylinders probably can idle lower than your four, but I was thinking sand hill first one to the top wins.

 

[Caleb]

I think this is pokey's bro...juding how sweet a motor is by its sound no their isn;t a lot of guys running 4 cyl in comp specifically because they are under powered...the ONLY person I know of that is even respectable thats running the 2.5L is Jason Bunch of Tri-County in Cali...a few are running the 1.6L but the only one that finishes respectfuly is Dean Bulloch...4 cyls dont cut it for rockcrawling...I used to think the same thing, gear it low enough and it will be fine...no thats not true...sometimes on steep climbs you really need the extra power of atleast a 6 cyl...Dija see Walker down in Farmington??? he was running some aluminum 4 popper and could hardly make the climbs(I bet you will see him back with either a 4.3L or a 5.7L)...so you are proud of your 4 cyl, thats fine...so was I at one point till I realized no matter what I did to it there still was just no power to be had...thats why I am now running a 4.3L and some day in the future may step up to a 5.7L...I think your power upgrades are mearly in your head...I did the same mods to mine and I did notice the throttle was more responsive but there was very little, if any, power increase...

 

[Caleb]

oh yeah if you are judging a motor on 31s then you ned to take a sneek peek at the comps...they wont even let you run with 31s

 

[bobdog]

I still want to hear the 4 that sounds like a small block.

 

[N-Smooth]

wow you guys can get fierce, i thought i said it was in my own opinion but thats cool. if i am supposed to feel stupid or something you failed. sorry bud.
my 4 cyl is good to me, and i am actually going to run 36.5's.
oh and thanks for adding that your 6 year old can drive better than me. i love it when people get pissed for like no reason and say really childish things. it's cool though cause i don't care. have a good one.
thanks,
nate

 

[jeepconvert]

nobody is pissed and love what ya love dude....its all good dont be mad

 

[Caleb]

yeah...I was going to say, who's pissed...I just was simply stating facts and Jeremy was making fun of ya and bobdog wants to hear your small block

 

[Hickey]

Originally posted by xj_punk

oh and thanks for adding that your 6 year old can drive better than me. i love it when people get pissed for like no reason and say really childish things. it's cool though cause i don't care. have a good one.
thanks,
nate

well, you're new here, so you won't get that one until your post count reaches 100. and yes, my son really CAN drive better than you. It's not opinion, it's a forum fact.