3.6 JL more power

[Stetson]

increasing power on a stock engine always decreases it’s lifespan. What never gets explained to people is that how it effects the lifespan is directly correlates to how often you are actually using that increased power. I mean you can slap a supercharger on and only go into positive pressure once a year, not really going to have any impact. I always lol at people that say they have 300k miles on a boosted stock motor.

So you can drive around supercharged without a care in the world as long as you monitor IAT’s, trans, oil, water. If something is getting too hot just upgrade the cooler.

If you like to drive fast and get into boost a lot and you monitor temps, you can probably expect around 50k miles on 6-7psi of boost before you crack a ringland or something.

I am not an engine expert so forgive my question but when you say 50k miles before something breaks…does that mean rebuild or replacement and what type of cost would that be to have a shop perform the work?

I am curious, if the cost is $7-8k +/- to supercharge the 3.6L, and another certain amount of money at +/- 50k miles…and the intention is to keep it for 8-10 years…what is the real cost of the supercharger?

Stetson

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[salmanj]

increasing power on a stock engine always decreases it’s lifespan. What never gets explained to people is that how it effects the lifespan is directly correlates to how often you are actually using that increased power. I mean you can slap a supercharger on and only go into positive pressure once a year, not really going to have any impact. I always lol at people that say they have 300k miles on a boosted stock motor.

So you can drive around supercharged without a care in the world as long as you monitor IAT’s, trans, oil, water. If something is getting too hot just upgrade the cooler.

If you like to drive fast and get into boost a lot and you monitor temps, you can probably expect around 50k miles on 6-7psi of boost before you crack a ringland or something.

I figured that it would decrease the lifespan, but I also might go for putting on the supercharger in the winter time since I only have use for it during the winter when I enter some sand dunes while during the summer it’s too hot to be doing that.

 

[Bzinsky]

I am not an engine expert so forgive my question but when you say 50k miles before something breaks…does that mean rebuild or replacement and what type of cost would that be to have a shop perform the work?

I am curious, if the cost is $7-8k +/- to supercharge the 3.6L, and another certain amount of money at +/- 50k miles…and the intention is to keep it for 8-10 years…what is the real cost of the supercharger?

Stetson

It depends entirely how you drive it.

If your jeep was for some reason your race car, bone stock it probably wouldn’t last 20k track miles. Supercharger just gives you the ability it to punish it more, it doesn’t mean your motor won’t last long.

If you crack a ringland at 50k, you’re looking at a full rebuild or replacement.

Often when people do full rebuilds, they will upgrade some of the internals like pistons and rods. Then you can raise the boost lol.

If you want to put a lot of hard miles on it, better off with a v8 swap.

If you just want it to be more fun to drive when you’re feeling frisky, it should be fine long term.

 

[Dlit]

I'll be doing a lift kit and 35s maybe 37s but 4:88 gears would make my 2dr Rubicon 3.6 a beast! I'm just concerned about highway speed on 35s with the 4:88s what's your experience?

Mine is fine 3.88 3.6 torque on 35s….great pickup….75 on the highway all day rpms are fine. Mileage on highway 19-20. Around town 16.4-18.5 typically

 

[JLfromCA]

Did Edelbrock ever get the 3.6 supercharger figured out and carb legal? They were talking about it for so long I lost interest. But I always thought that could be a good option.

 

[Chrisbayridge1]

Did Edelbrock ever get the 3.6 supercharger figured out and carb legal? They were talking about it for so long I lost interest. But I always thought that could be a good option.

I don't know, but that would be cool ?

 

[ganshert]

Apologies as I might be missing something but if I understand the current supercharger situation there aren't any on the market that are compatible with the current ECUs, correct?

from the Magnuson website... same exclusion on the other SC websites too.

which ECU does your 21 have?

 

[Bzinsky]

Apologies as I might be missing something but if I understand the current supercharger situation there aren't any on the market that are compatible with the current ECUs, correct?

from the Magnuson website... same exclusion on the other SC websites too.

which ECU does your 21 have?

Gpec5 started with chip shortage. It’s most likely that a ‘21 has the gpec2.

Also with a 3.6 you might be able to just swap ecu’s.

 

[258_T18A]

Hellephant 1100 HP crate engine ought to be enough to Get-er-done

Might want to consider a 200 shot of NOS too just to be sure.

 

[JLfromCA]

while doing research for on my 2019 it has gpec2 which can have a supercharger or mods. No superchargers for the Gpec5 or any E torque motors.

 

[JeepinJason33]

If your 3.6L is a 2021 auto, it most likely came with the eTorque. I am not familiar with any supercharger on the market that works with the eTorque. Someone out there please feel free to correct me if I am wrong. I asked around at SEMA and none of the big guys had one. The extra plumbing and wiring gets in the way...

 

[jeepingib]

I am super hesitant to recommend any kind of forced induction, i.e. supercharger or turbo on the JL 3.6L. They increased the compression ratio from the previous JK Wranglers and it's to the point where it is super tricky to tune something like that. I definitely wouldn't trust a canned tune.

I think that the best way to add the power you are asking for, and keep reliability, would be the E85 tune from Livernois and some deeper gears.

 

[1BadManVan]

I am super hesitant to recommend any kind of forced induction, i.e. supercharger or turbo on the JL 3.6L. They increased the compression ratio from the previous JK Wranglers and it's to the point where it is super tricky to tune something like that. I definitely wouldn't trust a canned tune.

I think that the best way to add the power you are asking for, and keep reliability, would be the E85 tune from Livernois and some deeper gears.

Yup. Ticking time bomb running boost on these high compression motors with no forged internals. Better to do bolt ons, a tune and re gear it. Can enjoy it without worrying about it blowing a hole out the side of the block lol.

 

[Bocephus]

Only add super charger if you are ready for engine-adventures (can afford, have other vehicles) , are able to tune yourself or have access to great tuners. Read the warranties carefully. On some, the warranty by year or miles is related to original in-service date of vehicle, not related to when SC was installed.

Also, only the non E-torque 3.6 is able to accept any SC...dont think any are sold for the E-torque, but I may be wrong.
I think you will pay in range of 6 or 8k, all in on a roots style SC.

I am on the side of gears and Livernois tune. I think the Livernois tune is only for non E-torque.

I would consider a used 392. You can find used with low mileage listing for high 60s and low 70s. I would do that, if possible.

 

[BenDiesel]

ya if i remember right light bright put a turbo kit on their jl before the hemi swap. i think it lasted like 10k or less?

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