JeeperCreeper69

Ok so I called to order a remanufactured long block today an as I was speaking with the guy he says they offer a HO performance upgrade for 290 more which comes included with mild upgraded cam shaft from speed comp up to 285 degrees, shaving the head, high volume oil pump, stiffer valve springs, and a 3 angle valve job. My questions after hearing that are, if I buy the package will there be anything else ill have to do to the map sensor/tranny so the tranny still shifts right? And do yous think spending the 290 is worth it? The sales rep says I should get a 15 percent increase in hp but I don't know about that. Opinions or suggestions?

cruiser54

You'll be fine leaving everything else alone.

excess650

It sure sounds tempting to me. An extra 25-30HP would be nice!

Who is the (re) manufacturer, or who are you buying through?

FI, trans and all will be fine. A bored throttle body and upgraded injectors would give you even more of a boost.

JeeperCreeper69

The website is remanufactured.com an I agree 100 percent there so right after I order the motor im ordering a bored throttle body(don't know from who yet or what size) and the neon 703 injectors. You guys are sure it's not going to throw off the map or anything tho/do you really think ill get 15 percent just from the upgraded cam an 3 seat valve springs? If this is the case im deff getting the HO option

cruiser54

www.strokedjeep.com has the best deal on throttle bodies. I've used 4 of them on different Jeeps with excellent results.

JeeperCreeper69

I apologize but he also stated the engine would be bored thirty over too

BuckB91XJ

Have the guy put a 7120 head from a 91-95 4.0 if you really want it to benefit from the bigger cam. All an engine is is a glorified air pump. The more air you pump through it the more power you get.

JeeperCreeper69

What makes that head produce more hp/airflow buck?

Slick761

That's supposedly the best 4.0 head casting with the highest flow. If you.want to make much more power port the head. Go on standard abrasive website. They have a walk through. I would def do that with the other upgrades. You will make some serious power. Also an adjustable map sensor would be an important addition to tune your a/f ratio. You will be introducing more air and need more fuel. If it was a mass air type setup the ecu would do it for you but its not.

JeeperCreeper69

Well, called the company to see about the 7120 head/ having either head ported and the answer was thats speed shop work.....although i would like to complain i cant because i havent found anywhere else that even remotely matches their price for what you get 1490 for the long block, 198 round trip shipping, 290 for the HO upgrade option. Guess the ported 7120 head is a project for the future unless anyone knows a better company to buy from or has a suggestion? As a after thought, anyone know where to pick up a adjustable map sensor?

Slick761

http://www.angelfire.com/my/fan/MAP_adjuster.html
Also http://www.google.com/m/search?pbx=1...porting&flip=0 click the top result (pirate4x4 one) you can do it all yourself.

JeeperCreeper69

Hey slick thanks for those links man.

Slick761

You can also buy a map adjuster for like 100 but I made mine for 25.

BuckB91XJ

so you could get a JY 7120 head and have a basic 3 angle valve job done on it or you mortgage your house to pay some speed shop to port and polish an inferior head to get the same flow results. The decision is yours.

BuckB91XJ

Have you ever heard the phrase "you can't polish a turd"? Well, you can't port and polish one either.