jeepcountry99

What are some good parts to get more horsepower on a 4.0 1999 sport

Gatchmo5710

Not too much to do. Full exhaust and intake. That's about it.

jeepcountry99

Yea I got a full exhaust u can't advance the timming

fatbill

stroke it. (period)

andrewmp6

A nice cowl intake should help it breathe better.The 4.0 is basicly a 50s tractor engine designed to run forever not make a ton of power.If you have gone up in tire size regearing it can make it feel faster.

BlueRidgeMark

Yep. There are a lot of things you can do, but they just aren't going to make a huge difference. It's putting lipstick on a pig.

If you want a lot more power, you need to look at dropping in a different engine, something like a 350 Chevy.

But then you have more power than the transmission can handle, so you need a Chevy transmission to go with it.

Now your transfer case can't handle the power, so you need a beefed up transfer case.

Now your differentials cant handle....


See where this is going?


If you are made of money, this looks like fun:

http://www.novak-adapt.com/knowledge/xj_swap.htm


Just for fun, I priced one on their website. It came to something like 11 grand for the engine and trans.

jeepcountry99

4.3 is going to my motor swap

andrewmp6

I would skip the 4.3 and go for a 350,The price vs power a small block is hard to beat.The 4.3 is ok but kinda slow in a s10 and the efi on it is tricky to make any power out of it.On the trans if its a trail jeep only turbo 400 if you want to daily drive it 700r4/4l60.Then you got what t case to use the options depend your tire size and how you will use the jeep.

BimmerJeeper

More horsepower?
You need a 2nd car like an M5.

Bustedback

Sounds a little pretentious

jeepcountry99

Just bought a 350 an turbo 400 trans for a 1000 bucks