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CoupleOvans
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Discussion Starter #1
I have an 06 stratus sedan. It's the 2.7 V6. I'm wondering if anyone has boosted or has info on adding boost to one.
I currently have a weapon-r intake, custom headers, full exhaust, and some ecu tuning. It performs well but I would like more, so hopefully someone knows something. Thanks in advance.
 

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[X]treme Aggression
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the 2.7'a have a weak bottom end on them, wouldnt reccomend boosting it unless u upgrade the crank and more importantly, rod bearings.
 

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Yea like extreme said it does have a weak bottom end and I would consider doing mods to the bottom end before boosting it and damaging the engine.
 

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CoupleOvans
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Discussion Starter #4
I've heard this of the older ones, but I thought they had the issues worked out after 03?
 

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CoupleOvans
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Discussion Starter #5
Or are there more NA mods I can do?
 

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CoupleOvans
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Discussion Starter #6
I know this is an odd project, but its an awesome car. Tight, responsive, and fairly quick. Just want to make it faster!!! lol
 

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[X]treme Aggression
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you can swap in the bigger 3 liter engine and it will drop right in (3.0, 3.3 or 3.5.. cant remember which), but its a lot of work cuz of the wiring harness and shit you ahve to swap also.. them engines are tanks and are easily boostable. it all comes down to how much time and resources you have
 

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CoupleOvans
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Discussion Starter #8
I think 3.5. SRT4 is a bolt in swap, so it'd be gravy (Mexico and Canada produced the stratus with them.)

I'm not really looking to swap motors. My 2.7 sounds like nothing I've ever heard, just need to get more mid-range power. I have excellent high rpm performance, just not much down low.
 

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[X]treme Aggression
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I think 3.5. SRT4 is a bolt in swap, so it'd be gravy (Mexico and Canada produced the stratus with them.)

I'm not really looking to swap motors. My 2.7 sounds like nothing I've ever heard, just need to get more mid-range power. I have excellent high rpm performance, just not much down low.
srt4's have the a 2.4l dohc turbo engine if i remember right.
 

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[X]treme Aggression
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Yeah, the srt-4 is a 2.4l dohc turbo engine, he was meaning the Stratus's came from the factory with the 2.4l turbo engine in Mexico. Would be a nice engine to toss in but at the same time one of those 3.5's have the same if not more power. Which ever is easier and accessible to you, I'd swap over building the 2.7l imo.
i have a 99 stratus with the 2.4 dohc :p

the turbo stratus (technically the first srt4) came out in like 97 or 98?

but yeah id get the 3.5l engine as its the same platform as the 3.8 found in the caravans and stuff.
 

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2.7's are WEAK! The bottom end is made of toothpicks and silly string!

On paper the engine looks GREAT, but in reality it is a GIANT pile of wasted energy and metal. I hate to say it, but it is one of the WORST designed engines of all time.

I'd say swap it for a 3.5 if you can fit it in there and never look back.
 

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[X]treme Aggression
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2.7's are WEAK! The bottom end is made of toothpicks and silly string!

On paper the engine looks GREAT, but in reality it is a GIANT pile of wasted energy and metal. I hate to say it, but it is one of the WORST designed engines of all time.

I'd say swap it for a 3.5 if you can fit it in there and never look back.
the 3.5 was on option for it, so it will drop right in. getting it in isnt the problem. the problem lies in that you have to install a full 3.5 wiring harness.
 

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CoupleOvans
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Discussion Starter #14
the 3.5 was on option for it, so it will drop right in. getting it in isnt the problem. the problem lies in that you have to install a full 3.5 wiring harness.
The 3.5 was never an option for a stratus. Your thinking intrepid. Not the same cars.
My 2.7 has taken 100k of hard abuse and has yet to flinch, so I consider it quite hardy, and it definately doesn't waste energy, it destroys much more ample performance vehicles. I would much rather swap the 2.4 turbo seeings it is a direct bolt in, but I don't want to swap motors!!! So the swap motors info can go away completely.
 

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You are correct, the 3.5 was never a cloud car option, but it was brought up, so I went with it because it is based on the narrow angle 3.3 which could be had in transverse FWD. The 3.5 is MUCH wider however because of the heads. That's the main reason I think we've not seen that swap in our TD's. The other glaring issue is there is no 5-speed option.

The thing is (and I could be completely wrong here as I honeslty don't remember) that I thought the 3.3 and the 2.7 shared bellhousing patterns. Because of this it solves (sort of) the lack of a manual transmission for that engine series and makes a 3.5 transverse swap a bit more of a realistic dream.

Anyway, back on topic. The 2.7 *can* be a decent runner if taken care of correctly (most weren't and aren't). This ONLY applies when they are left in mostly stock configuration. They absolutely do NOT have the internals for boost or squeeze. To my knowledge there is even LESS support for the 2.7 than there is for the 3.0 (which is hard to believe!). Building one to make power reliably is going to be an expensive proposition, and probably ultimately futile. Notice I'm not saying it CAN'T be done, just that it really doesn't make much sense to.

I will say this, if you build a screamer 2.7, it will be VERY unique indeed....
 

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Its a pretty well established fact amongst professional mechanics that 2.7's are total garbage and they are avoided like the plague.... years back when people actually thought about fixing them, the junkyards were charge 2k for a used one with a 30 day warranty because its so hard to find one that didnt toss its guts out of the oil pan or block
 

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CoupleOvans
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Discussion Starter #17
Its a pretty well established fact amongst professional mechanics that 2.7's are total garbage and they are avoided like the plague.... years back when people actually thought about fixing them, the junkyards were charge 2k for a used one with a 30 day warranty because its so hard to find one that didnt toss its guts out of the oil pan or block
My opinion, if it was total garbage it wouldn't have held up to the 100k of abuse I've put it through. Ones that aren't maintained don't last, which is most stratus owners. Mine is meticulously maintained and thus takes everything I throw at it. My friend's RT 5spd sedan has 175k of abuse and just started to puff a little oil, proof that not all are garbage.
Now if we can get off bashing the 2.7, can someone throw out ideas to get more power?
 

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Anyway, back on topic. The 2.7 *can* be a decent runner if taken care of correctly (most weren't and aren't). This ONLY applies when they are left in mostly stock configuration. They absolutely do NOT have the internals for boost or squeeze. To my knowledge there is even LESS support for the 2.7 than there is for the 3.0 (which is hard to believe!). Building one to make power reliably is going to be an expensive proposition, and probably ultimately futile. Notice I'm not saying it CAN'T be done, just that it really doesn't make much sense to.

I will say this, if you build a screamer 2.7, it will be VERY unique indeed....
You are now at the juncture of having to dive into the engine to make more power. Porting would be a good next step. However, I believe after that you are kind of done without replacing internal parts for stronger stuff. It simply isn't in the cards for the stock internals to make much more power.
 

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CoupleOvans
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Discussion Starter #19
You are now at the juncture of having to dive into the engine to make more power. Porting would be a good next step. However, I believe after that you are kind of done without replacing internal parts for stronger stuff. It simply isn't in the cards for the stock internals to make much more power.
I suppose heads would be an option. It is quite ample in the revs, just lacks mid-range, which is what I wanna improve.

I did find a guy who specialises in 2.7s, rebuilding/building, sounds like other then weak rods (for boost) the motor will take 5-6lbs generally without issue.
 

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Its a pretty well established fact amongst professional mechanics that 2.7's are total garbage and they are avoided like the plague.... years back when people actually thought about fixing them, the junkyards were charge 2k for a used one with a 30 day warranty because its so hard to find one that didnt toss its guts out of the oil pan or block
Yup them rods do not like their home....if someone said it would handle 5psi of boost they have no clue,those are powder metal rods,not exactly boost worthy,although there may be some that are.....they fail as DD vehicle engines. The one I replaced was spotless inside.
 
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