How much power you think the 3.6L pentatstar is capable of? - Page 6 - Jeep Garage - Jeep Forum

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  #61  
Old 04-08-2016, 05:08 PM
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Re: How much power you think the 3.6L pentatstar is capable of?

Well, im sorry and thankful. I think we'll both learn from your experiences. if the internal carnage isnt too bad, maybe theyll be able to see the actual root cause. Please share it if they do. I know theres a hole in the block, i wanna know all the lil foot prints before the wall was kicked in.

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  #62  
Old 04-08-2016, 07:04 PM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by alludc View Post
Well, im sorry and thankful. I think we'll both learn from your experiences. if the internal carnage isnt too bad, maybe theyll be able to see the actual root cause. Please share it if they do. I know theres a hole in the block, i wanna know all the lil foot prints before the wall was kicked in.
I'm actually relieved that the engine blew up ..now I have an open bill with the wife

I'll post some pics later but I collected some pretty large piston parts that exited the block
Lol

I'll let you know what happened but I'm pretty sure it started with a blown ring or 2 over the past couple days and then finally a rod or piston today
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  #63  
Old 04-09-2016, 06:51 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by alludc View Post
Damn. Saw that coming but damn. Stock pistons and rods can't take much detonation. U throw a rod threw the block?
This is correct unfortunately.
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  #64  
Old 04-09-2016, 06:53 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

Jeep has v6 or hemi they should put the 4.7 in these..or modern up the 5.2 they need a motor in between the 4.7 would work great in the wrangler a few more choices.
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  #65  
Old 04-09-2016, 10:08 PM
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Re: How much power you think the 3.6L pentatstar is capable of?

Never a good time when things go boom but I'd like to point out a few things.

1) At ajag's RWHP and RWTQ it doesn't matter how good the tune is or how many times you change fluids because the engine and tranny parts were not designed for those HP and TQ levels. And in the end, those parts will fail.

2) Making horsepower is easy. Get the engine to burn more fuel and it'll make more power. What costs you money are the components in it to make that engine strong enough to handle the kind of power it's going to make (or is capable of making). Price has nothing to do with the power it makes, but has EVERYTHING to do with how much power (and abuse, such as missed shifts, leaning-out, etc) it will be able to handle. The stronger it is, the more it will handle.

Good luck ajag with whatever direction you end up going with and I look forward to reading all about it.

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  #66  
Old 04-10-2016, 06:11 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by Michael Plummer View Post
Never a good time when things go boom but I'd like to point out a few things.

1) At ajag's RWHP and RWTQ it doesn't matter how good the tune is or how many times you change fluids because the engine and tranny parts were not designed for those HP and TQ levels. And in the end, those parts will fail.

2) Making horsepower is easy. Get the engine to burn more fuel and it'll make more power. What costs you money are the components in it to make that engine strong enough to handle the kind of power it's going to make (or is capable of making). Price has nothing to do with the power it makes, but has EVERYTHING to do with how much power (and abuse, such as missed shifts, leaning-out, etc) it will be able to handle. The stronger it is, the more it will handle.

Good luck ajag with whatever direction you end up going with and I look forward to reading all about it.

Thanks
Michael Plummer
I definitely agree..I had great luck with the stock engine and tranny on the stage 1 setup (330hp to the wheels) but knew that going beyond that would potentially be too much...but I decided to see how far I could push it. I've been looking for tc and Tranny options the past couple months because this isn't my first upgraded vehicle and I know it's just a matter of time until that fails as well.

I was already planning on building the custom lower end as I knew the block wouldn't hold up..so now this allows me to try getting everything changed all at once ..I'm hoping to be able to install a much stronger tc and tranny setup when my new engine is installed ..I'm just hoping that this new setup will be able to make 400-450whp reliably on 13-14lbs of boost..but we'll see what happens
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  #67  
Old 04-11-2016, 10:14 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

well...here's a couple of the piston pieces I was able to find in my front skid plate...

This can't be good
Attached Images
File Type: jpg Blown motor (7).jpg (530.7 KB, 56 views)
File Type: jpg Blown motor (8).jpg (513.5 KB, 50 views)
File Type: jpg Blown motor (1).jpg (537.9 KB, 50 views)
File Type: jpg Blown motor (2).jpg (598.6 KB, 47 views)
File Type: jpg Blown motor (4).jpg (576.5 KB, 58 views)
File Type: jpg Blown motor (6).jpg (596.1 KB, 67 views)
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  #68  
Old 04-11-2016, 10:20 AM
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Quote:
Originally Posted by ajag View Post
well...here's a couple of the piston pieces I was able to find in my front skid plate...

This can't be good
Curious to see the other pistons.. you should be able to tell from the intact pistons if it was a tuning/detonation issue or if the conrods were not up to the task.. didnt you have a tuner unfamilliar with mopar try retuning with hptuners just prior to this?
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  #69  
Old 04-11-2016, 10:40 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by peteyturbo View Post
Curious to see the other pistons.. you should be able to tell from the intact pistons if it was a tuning/detonation issue or if the conrods were not up to the task.. didnt you have a tuner unfamilliar with mopar try retuning with hptuners just prior to this?

Yeah...but we never were able to connect to apply an HP tune...I was working closely with Johan Mangs(diablo tuning) on the tuning...but we were never able to dial out the knocks ....we seem to think it was because there was oil blowing through the motor due to some failing rings or piston damage.

No matter how we adjusted the fuel or spark I was still getting knock...it was just a matter of time until this happened...

I actually upgraded the entire fuel system with a new pump and voltage booster just to eliminate that as a potential reason for the knock but it didn't help. It's been running crappy for a while so that also made me stay away from the Dyno and HP tune...I was hoping to be able to tune out the knock before applying an HP tune.

The new motor will be built with boost in mind so this shouldn't happen again..at least I hope not
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  #70  
Old 04-11-2016, 10:51 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

building the motor for boost will have many benefits. Built right, you can run less boost and get similar if not better numbers. hopefully you are also looking at a boost specific cam setup.

Cant wait to see you unleash it.

**pretty sure im looking at pieces of the Rod there
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  #71  
Old 04-11-2016, 11:01 AM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by alludc View Post
building the motor for boost will have many benefits. Built right, you can run less boost and get similar if not better numbers. hopefully you are also looking at a boost specific cam setup.

Cant wait to see you unleash it.

**pretty sure im looking at pieces of the Rod there

I will be working with 505 performance out of New Mexico on this build...Zach there has agreed to build me their first fully custom boost specific built 3.6L.

they have built a few with forged pistons and some mild headwork but this one will be built stronger ...so there will be some R&D involved...meaning its expected to take 8+ weeks - ...this also includes cam work to add more duration...the target is to lower the compression down to roughly 9.5:1 and then build it to safely manage 13-14LBS of boost

I'm not sure what those metal parts are from but that's what I found in my skid plate...I haven't had the Jeep ripped into yet...
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  #72  
Old 04-11-2016, 07:27 PM
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Re: How much power you think the 3.6L pentatstar is capable of?

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Originally Posted by ajag View Post
No matter how we adjusted the fuel or spark I was still getting knock...it was just a matter of time until this happened...
When you say "spark" do you mean advance aka total timing? And did you try more octane to see if it had an effect on the knock?

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