Anybody ever build one of these? I've got one I wanna build, found a cam from Lunati that supposed to work good. What do you do for the computer? Send it out? Take it to the city and have someone program it?

 

If that cam has more than 0.440-0.450" valve lift, you will need different valve springs than stock.
As long as there is sufficient vacuum at idle with that cam, the ECU should adjust.
It would be best to get the ECU retuned but there are only 2 guys that can reprogram the JTEC ECU.
For the most part all the cam will do is move your power up in the rpm range.
In the end, a stock cam is still hard to beat. Better is to use 1.7:1 Harland Sharp roller rockers which will work with the stock cam, valve springs and ECU tune.

 

Meh...What do you know from experience?

LOL...

OP: Listen to Marty. He has hands on experience with this stuff.

 

what do they use to tune the ecu? I've been following hptuners and it seems they are only capable of dealing with the latest ecu revision.

 

Chris uses factory level emulators, monitors, access and reflashes the ecu in realtime or send ecu to him to flash. He is the only one who can make changes in realtime on a dyno. I believe that he is the only one in the general public to have this manufacture level of programming capability. Where he got it IDK. He tunes SC vipers, SRT10 trucks, etc. He charges like $250-$300 to reprogram your ecu that you send him and his experience and knowledge gets it right nearly every time.

Ryan uses SCT Suite and a handheld programmer and the OBD port to reprogram the ECU. I don't think that he has as much access as Chris but he seems to know some tricks to tune for stroker, bigger injectors, and supercharging. You have to data log and then send it to him to tweak and he emails it back to you to try again. It probably takes a few iterations of this back and forth to get it right but as his experience and tune library grows he is probably able to nail it on the first or second try. He starts at about $700 because you have to buy the handheld and then buy his tuning, $399 + $300, more is supercharged.

 

hmm ok

hpt supports (I believe the last) 4.0 wrangler. has anyone tried swapping a harness/ecu back to ours and simply disabling any extras? I'm guessing something like this can be done but no one cares enough to try.

 

Yeah '05-'06. That is why Banks is able to reprogram those years on their turbo kit.