There is no M90 kit per-se... We really just liked the manifold on the Sprintex kit more than anything. And also the M90 is a twisted roots supercharger whereas the Sprintex s/c is a true twin screw supercharger. Twin screw is newer technology, so that was part of the reasoning as well.

And we knew exactly how we wanted to fix the "tuning issues" that other people were having with the Sprintex kit.

 

Agree.

The Sprintex kit comes with a tuner? If not, you used the AEM?

 

Nope. Kit doesn't come with a tuner and I didn't use the AEM.

I used a completely custom Split Second piggyback to control the timing retard and the 7th injector. It also has a MAP clamp in it. And it can data log to my laptop.

 

Sounds hi-tech

I thought I read someone used a hypertech or something? Maybe I read wrong.

 

Hypertech hasn't cracked the Cherokee's computer yet, as far as I know...

It's really not that difficult once you've done it. Lol.

The good thing about running a 7th injector is that the Jeep runs stock until you hit boost. So... Stock mileage while out of boost.

 

Per my signature, I have Hypertech III in my Cherokee. I bought it.

I do like that. Did you do a write up in detail? I emailed the company, Rick replied and thought I was the competition asked a few questions, and never heard back.

 

Meh. Idk then.. Check out the rest of my build log. Everything on the supercharger install is in here.

 

Sorry to bother. Ill keep researching.

 

You're not bothering me, it's just that I posted a TON of pictures of my install on this thread and I'm just too lazy to find and quote the ones in question and clutter us this thread too much by reposting them.. Lol.

And I looked up that Hypertech.. Just looks like a Banks/ Superchips type flasher to me. I don't think you can retune the whole fuel and spark table with it for boost. But I could be wrong. That's always a possibility. Lol.

 

Im lost on the advantage to 7th injector. Jeep should run stock on 6 injectors and just demand more fuel from them when you hit boost? Unless you added an injector opposed to resizing the other six?

 

The stock injectors are pretty much maxed out as is. The only way to get more fuel out of them would be to use a FMU to bump up the fuel pressure... But I'm not a fan of those and they don't work on a returnless style fuel system.

If you add 6 bigger injectors, you have to "tune them down" to get it to idle. You're retuning the ENTIRE naturally aspirated fuel curve and it's almost impossible to get it back to being close to stock. You would also need a 2 bar MAP sensor so the computer can read boost, but you also lose resolution with the 2 bar...

My 6 factory injectors are stockish (703) and run as if the Jeep was naturally aspirated. I don't mess with those at all. I plumbed the MAP sensor to boost and then clamped it, so when I go into boost the Jeep immediately snaps into open loop. Then I can add all the fuel I want using the 7th injector.

The advantage is that the 7th injector sends the fuel through the supercharger thus cooling the air as it goes through the supercharger and keeps my charge temp cooler than if it were just air going through.

 

 

Wrecked?

 

Seized alternator. Lol.
I am very safety driver

 

what brand gauge pod did you use?
is it the autometer 2 1/16