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3.6 upgrades

29K views 41 replies 12 participants last post by  JGCO_77  
Not sure if the 17's are much different than the wk2 14's but the SRT brakes are a direct bolt on to pretty much any wk2 ...I had 14' SRT brakes installed onto my jeep and they work perfectly.

as for the upgrades...well....I've tried most everything on your list ..sprint booster/Exhausts/ Ported Throttle bodies(2 Diff ones) ..2 Diff Cold Air Intakes...and none of that stuff really does anything except make more noise ...nothing really as far as HP gains...at least nothing you'd feel..

SO ..I ended up Supercharging my 3.6 about 18 Months ago ...started with a Stage 1 RIPP Kit and ran it with 8 lbs of boost...increased AWD WHP from 184 Stock to ~320AWD HP with some tuning


With a Stage 2 RIPP kit (bigger intercooler/Injectors/Fuels System upgrades) and 10-11LBS of Boost I was able to net ~420AWD HP for a short amount of time...before popping the motor....this was due to me increasing boost to 15lbs on the stock motor..and the tune wasn't stable

I'd say if you're really looking for hp then accept that nothing comes cheap on these 3.6's ...spending money on these bolt on's really won't get you any noticeable HP...I never tried a custom tune on the stock setup but I can't imagine it really adding all that much HP

I've probably gone deeper down the rabbit hole with the 3.6 than any other member here on this forum...I had a custom 3.6L engine built and it's about 1-2 weeks from completion..it was on the dyno for 10 hours last week alone...shooting for a 450+ AWD HP # out of the new block...so far its looking good ...we're getting pretty close to that number and still have room to go ...

I think the SRT brakes are one of the best cosmetic things you can do for your jeep


Oh yeah...and as for tuning...the diablo didn't seem to work all that great with my supercharged setup as it's pretty limited as to what you can tune/change in comparison to the HP tuning ...so My new setup is being tuned with HP tuning and it runs/shifts and drives better than ever.

I'm in the boston area and have a local tuner here that can do your Jeep on the AWD dyno if interested...
 

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My build

I've invested more into my v6 Jeep than the cost of a new hellcat Jeep :)

In hindsight I wish I had just bought an srt but I was really hoping to just do enough to my Jeep to make me happy until the hellcat is released

Hindsight is 20/20


Too late now :)
 
You say too late now, but do you regret what you've done thus far? Aside from the cost that is. I'd say you've got a pretty badass setup there and nothing to be disappointed with.
Nah...I don't regret it ...i'll be happier when I actually get it back on the road though...it's been over 9 months since I blew my motor and started the rebuild project...it took ~7 Months to get the new motor built (all custom stuff that's why) and then about 2-3 weeks for the install...now it's been at the tuning shop for almost 8 weeks now ...good thing is that they are working out every single bug....something that never happened when I had the first supercharger setup installed...Just bolting on the supercharger is only half the battle....there's still a long road after that to work out the tuning and issues..

HOPEFULLY ....when I get it back in a week or 2 it will be putting down good reliable power...the motor I had built has all forged internals so it should last a while...the stock motor has the ability to make almost the same power...but it doesn't hold up for long
 
The good thing is that the forged internals are much stronger and will add longevity...but the fact that there are no real "performance" upgrades for these motors means that this expensive block I had built really isn't going to produce much more power if any ..than a stock block.

the factory heads are actually pretty decent...so a full porting job on my motor only netted ~18% increase in air flow....the cams are pretty limited in what you can do as well ...so that's all we were able to do was add a little more duration...to allow the boost to get into the cylinders a little better ...as for the pistons...the custom pistons I had made are ~ 1/2 ratio lower compression than the stock pistons...I did this to allow the motor to reliably support 15+ Lbs of boost ...

I'm so deep into this new motor that I'm really shooting for a decent HP number but focusing more on RELIABLE power ...meaning we are keeping the A/F in a VERY safe range as well as ZERO misfires or knocking ...My tuner is still working on the high end range of power now ...we'll probably do a hero Pull or 2 ...just to see what we can get ...and then dial it back from there ...right now they are @ ~420AWD HP/420 TQ at 14Lbs of boost at 5700RPMS...and it still has a ways to go...

I had a custom Torque Convertor built for this new motor and from what the tuner is telling me...it's producing lower HP #'s than a stock one...but is a MUCH better setup for the street...~3000+ RPMS this TC grabs WAY harder than a stock TC...my 1-2 Shifts are pretty ridiculous fast on the dyno
 

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420 HP & TQ and still have further tuning, oh yeahhhhhh.
Hopefully the powerband suits ya?

Those Pistons, I think I got a woody!

What about the V3, did you stick with stock unit or????

The tranny, I would assume all that is available,e would be to work the converter, maybe the valve body depending on who it was sent to.

The never ending quest to find the next weak link. Oh how I miss speed....

Need to get you a sponsor, being V6 and all!!!

Yeah..hoping to see a safe number around 450/450 but not sure if "safe" will be in that range ..I think 600hp at the crank is totally realistic..but with drive train loss not sure 450 to the wheels is realistic ..but probably is..we'll see..my belt was slipping on the dyno pulls last week so they've replaced the belt along with fixing a couple other issues ..so with any luck the final tune will be done this weekend or next week and I'll be driving it :)


You're right..nothing available as far as an upgrade to the tranny (re845) I looked into cryo dipping but no one wants to touch it ..I have a spare tranny so when my original one fails I'll have a swap ..and then I'll really pursue a stronger option

The torque converter in my Jeep has been completely overhauled and is supposed to be much better over the 2600-3000rpm mark..not exactly sure what was done but it was pretty pricey so I'm hoping it's worth it


My stage 2 kit is the same v3 compressor but due to larger injectors (900cc) , larger piping,srt intercooler and custom fuel rails with full return system ..this setup has the ability to make a LOT more power than the stage 1 kit .

The same pulley that creates 8lbs on the stage 1 creates 10-11lbs on my stage 2 due to the larger piping/intercooler (volumetric increase)
With the "altitude" pulley ripp sells for the wrangler it allows me to make a solid 15lbs of boost ..while keeping intake air temps to an acceptable level

Theoretically this setup should be capable of some serious hp

I've considered having a custom pulley made to increase the boost even more but I'm pretty sure the compressor is at the upper limits of it's abilities right now ..the "next" upgrade I'm considering is a methanol injection system that could potentially add another 50-75hp

But in need to drive it for a while to see if I need more power :)