2009 BH Sedan 3.8L V6 Performance & starter mods (w/Dyno figures)

[HAZ JOV6]

Because it was really hard to find real world data of first generation V6 Sedans perfromance, I'm leaving some information here for other memebers reference.

First Generation V6 Sedans (2009-2011) 3.8L MPI Engine Rated stock 290hp at the cranck. I believe I had read somewhere in the web a car was dynoed around 243Whp bone stock on Mustang Dyno, and another showed 254whp on a Dynojet. Where these 3 figures looked reasonably consistent with respect to eachother, I assume them as baseline of stock performance.

 

[HAZ JOV6]

With obvious lack of aftermarket performance products & support to first generatiin sedans, we were left with very much least of options to add some performance fun onto these luxury sedans.

First on the list and easiest is having a drop-in performance high-flow intake filter. And I was lucky to find from Amazon.
(K&N replacement drop-in filter / part number 33-2427)

First dyno of my 2009 3.8L (just clocked 86k miled in odo) with secondary charcol filter removed from stock airbox & K&N drop-in filter maxed at 246.5Whp (Mustang Dyno)


MPG: on a fixed daily road stretch to work (highway) that my car used to average repeatedly 6.5-6.6L/100km, it averaged 6.2-6.3L/km for a month with K&N drop-in filter.

 

[HAZ JOV6]

Next was attempt to get rid of accordion shaped oem intake pipe.


Looking for a bit of intake growl & having in mind that a less resteiction to intake air flow should in away or another add that tone, and might free some hp out of fuel mixture burn. But looking at the tight space it was difficult to structure a smoother intake duct with aluminum pipe(s) and hose couplers, let alone having aproper inlet to connect pcv line.
I ended ordering a custom make direct-fit silicone intake hose, which went on car as fast as I could mount after it arrived.


(ignore the IIN logo, I've just played with letters from a leftover K&N sticker )

The intake hose added a deeper intake sound note, and I immediatly noticed enhanced throttle responsiveness. I drove the car for tow days with the new hose, then went on same dyno where car now maxed 253Whp on Mustang Dyno




Although dyno returned performance max gains exceeding my expectation (+6whp) with the intake hose, but the graph showed drop in low end torque, opposite to my repeated feel of enhanced throttle responsiveness!.

MPG: For 2 days in a row, on same road stretch car has averaged 6L/100km.

 

[HAZ JOV6]

Next to come variable flow mufflers & ecu tune afterward. Stay tuned for info .

I'm not into cat delete or a droning/raspy exhaust regardless of any possible gains .





P.S: this thread not meant to raise any of the common debates about filterd, intakes, mods or whatsoever. Just to have some info here for whoever might be conncerned.

 

[Franky99]

Do you have a roof wrap on your car? I just purchased a 2011 Sedan (tech package @ 78k miles). Love the look! Appreciate the posts

 

[HAZ JOV6]

yes roof is wraped in black, along with all chrome parts

 

[HAZ JOV6]

The intake hose added a deeper intake sound note, and I immediatly noticed enhanced throttle responsiveness. I drove the car for tow days with the new hose, then went on same dyno where car now maxed 253Whp on Mustang Dyno

looking at the graph again -at AFR lines in specific, I quess the intake hose has more of potential left. (I have not reset ecu).
Where it seems that in lower--mid (closed loop) range the car's ECU has not adjusted fuel trims fully yet to increased air flow, and in upper end (open loop) the next ecu tune has a good job to do further.

 

[Dh09Sedann]

Next was attempt to get rid of accordion shaped oem intake pipe.
View attachment 44400

Looking for a bit of intake growl & having in mind that a less resteiction to intake air flow should in away or another add that tone, and might free some hp out of fuel mixture burn. But looking at the tight space it was difficult to structure a smoother intake duct with aluminum pipe(s) and hose couplers, let alone having aproper inlet to connect pcv line.
I ended ordering a custom make direct-fit silicone intake hose, which went on car as fast as I could mount after it arrived.
View attachment 44409
View attachment 44403
(ignore the IIN logo, I've just played with letters from a leftover K&N sticker )

The intake hose added a deeper intake sound note, and I immediatly noticed enhanced throttle responsiveness. I drove the car for tow days with the new hose, then went on same dyno where car now maxed 253Whp on Mustang Dyno
View attachment 44404
View attachment 44430
View attachment 44406View attachment 44407

Although dyno returned performance max gains exceeding my expectation (+6whp) with the intake hose, but the graph showed drop in low end torque, opposite to my repeated feel of enhanced throttle responsiveness!.

MPG: For 2 days in a row, on same road stretch car has averaged 6L/100km.

Hey was Just wondering where’d you get the custom intake hose. Love the car just got mine and I love that word you’ve done on yours. Do you mind telling me what custom measurements you sent in the for intake hose too?

 

[HAZ JOV6]

Hey was Just wondering where’d you get the custom intake hose. Love the car just got mine and I love that word you’ve done on yours. Do you mind telling me what custom measurements you sent in the for intake hose too?

Hello

I had it custom fabricated to dimension (non GDi, 2009-2011), DM you details.

 

[HAZ JOV6]

Hey was Just wondering where’d you get the custom intake hose. Love the car just got mine and I love that word you’ve done on yours. Do you mind telling me what custom measurements you sent in the for intake hose too?

I don't know if this violates any forum rules!!
Hose was custom fabricated with:
www.ronteix.com
order@ronteix.com


ps: I'm not affilated with supplier.
@ admins, you can remove post if against any rules.

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Help support this site so it can continue supporting you!

 

[G-689087]

You should keep doing this I love reading and seeing this even tho I cant do most of it I love to see someone really do something to the first Gen sedan it’s great you should make YouTube honestly your choice tho brother have a great adventure with that thing

 

[HAZ JOV6]

Throttle Body Coolant Bypass done today

Knowing this a topic of much debate about performance mods, but being a simple and free one Icve done it before on other cars and now to the Genises hoping for any potential of couple ponies running in.

I do believe in the theory, where eliminating the heat from collant lines will surely leave TB at lower temperatures. Espefially with first generation Genesis BH where intake manifold is made from engineering plastic which usually have excellent thermal properties and less heat conductive. Some guys swear for dynoed 5-7whp, others see it worthless. But from my exoerience doing it in pregious cars among other mods (not dynoed alone) I esrimate 2-3hp gain. Which is still good (even if a 0.5) to top up on power being free of charge .

Original setup (BH Sedan 2009 - 3.8L V6)


Bypassed: simple I rerouted the existing hose in a U-line shape.


In case any fella interested to do, some tips on the process (without dishassembly of air inatake or any parts):
- remove both hose clamps on TB first (easier)
- pull both hoses off TB
- undo the bolt shown in below image, this helps to move the lines upward then access and removal of other side hose clamps is easier.
- use one hose to bypass the lines and re-fit clamps, bolt it back.
- use other hose to U the TB ports to keep its passage clean in case you wish to revert later on.
- remember .. work while engine is cold.
- after completing, turn engine on, let it waem up, and check for any leak from the hoses, ensure clamps are well fitted.

 

[HAZ JOV6]

I've been driving for 3 days with TB coolant bypass ... I definetly recommend it, at least surely for the 2009 V6 BH. You can try it guys and see it yourself, it's totally free, simple & reversable in case you don't like it or don't notice a change.

Forget about power gains being 1 or 100hp and such .. but there is a clear noticable perfoemance pump at lower end (1k-3k rpm) & enhanced throttle response. Think of those first 1-2 minutes of a cold day morning startup performance , lasting with you for all day.

 

[HAZ JOV6]

Throttle Body Coolant Bypass done today

Knowing this a topic of much debate about performance mods, but being a simple and free one Icve done it before on other cars and now to the Genises hoping for any potential of couple ponies running in.

I do believe in the theory, where eliminating the heat from collant lines will surely leave TB at lower temperatures. Espefially with first generation Genesis BH where intake manifold is made from engineering plastic which usually have excellent thermal properties and less heat conductive. Some guys swear for dynoed 5-7whp, others see it worthless. But from my exoerience doing it in pregious cars among other mods (not dynoed alone) I esrimate 2-3hp gain. Which is still good (even if a 0.5) to top up on power being free of charge .

Original setup (BH Sedan 2009 - 3.8L V6)
View attachment 46638

Bypassed: simple I rerouted the existing hose in a U-line shape.
View attachment 46639

In case any fella interested to do, some tips on the process (without dishassembly of air inatake or any parts):
- remove both hose clamps on TB first (easier)
- pull both hoses off TB
- undo the bolt shown in below image, this helps to move the lines upward then access and removal of other side hose clamps is easier.
- use one hose to bypass the lines and re-fit clamps, bolt it back.
- use other hose to U the TB ports to keep its passage clean in case you wish to revert later on.
- remember .. work while engine is cold.
- after completing, turn engine on, let it waem up, and check for any leak from the hoses, ensure clamps are well fitted.
View attachment 46641

TB coolant Bypass mod, a little Note:

The original function of TB coolant lines is said as precaution to prevent TB plate freezing in extreme cold climates. So if you happen to live in up states, Canada or north Europe you may want to give it a double thought before doing it (or to reverse it in winter times).

 

[HAZ JOV6]

In past weeks, after Throttle Body Coolant Byoass I had the engine decaebonized with Hydrogen Pulses Carbon Cleanig, which has shown an immediate noticable enhanced performance & throttle response.

Today I put her on same dyno (Mustang Dyno), to get a numeric expression of my buttdyno feel of a/m 2 changes.
And that feel of "enhanced throttle response" during past weeks, translated in numbers as: within range 2500h4500rpm, increased torque of +15~25 wN.m & power +10~15 whp.
Maxed top end at 258whp. (+5whp from last test)

I guess my buttdyno was reading correctly, as I bet friends it's a 10+hp thing .
Per buttdyno, I would esrimate the result be divided as 30:70 between throttle body coolant bypass : carbon cleaning.



P.S: decarbonizing actually restores lost ponnies rather than adding power.

 

[JEBIV]

Very interesting

 

[HAZ JOV6]

#fuel_consumption

Below record figures for a reference comparision between each measurment state & subject changes.
Your actual fuel consumption average will vary per route/driving/speed/traffic/elevation ..etc.

Measurements all were done on #fixed_25km_route stretch, a suburb highway to mantain repeated continuous driving conditions, doing 90-100km/hr at 1500-1700rpm, A/C off, windows closed, tires checked 38psi (warm), filling 95RON Octan gas (equivelent 91-92 per US norms).

Car (2009, 3.8L MPI engine) had 82k miles when started records for comparison:

Stock Avg 6.5-6.6 Ltr/100km

> w/ K&N drop-in panel filter dropped to 6.0-6.2 Ltr/100km

> w/ add custom smooth intake pipe, down to 5.8-6.0 Ltr/100km

> w/ add TB coolant line bypass, down to 5.6-5.8 Ltr/100km

> w/ add Hydrogen pulses engine Carbon cleaning, hit down to 5.3-5.4 Ltr/100Km.

* each reading was taken from several repeation record of same a/m conditions.

 

[HAZ JOV6]

I'd always wondered .. while most online available resourses rate 1st gen 3.8L V6 sedan at 290Bhp, why my car engine ('09 3.8L V6 non gdi) is speced at #303Bhp by this one site (screen shot shown) according to particular VIN!!. and that was coming in line with my real dyno figures too.


previously maxed #258WHP_SAE corrected on a Mustange dyno with just 11whp pump from intake modification made me happy, but was surprised because this figure compared with many dyno figures of other Genesis 1st gen put my figures in the range closer to BK's rated power outputs (330-345Bhp).

Yesterday, in attempt to delete secondary cats, I found out I don't have secondary cats!!!. But an OEM straight through resonators shaped like cats. This adds to not having secondary charcoal air filter in the airbox (which I thought previous owner had removed in a very very clean professional way). I think these a #KDM/Non-US spec variations of specs.

Anyway, I still removed exhaust silencer rings placed inside these OE resonators, to see if this can still top up a pony or tow.

Over 2days driving almost 200km, the car felt much better. Today I took it for couple of dyno runs to see things charted.

>> low end (below 3500rpm) torque increased noticably making a flatter low end range curve. Averaging +20whp in low end range from last dyno.
Mid-high range remained almost identical to previous last dyno (max top end 258whp).

RESULT: FREEING EXHAUST FLOW at this spot in exhaust line ENHANCED PERFORMANCE.

 

[HAZ JOV6]

So I ended putting 2" test pipes in secondary cats location .. I HIGHLY RECOMMEND SEC CAT DELETE TO EVERY V6 (do in pipe size 2").

Sound: (exhaust system & mufflers all stock aside from these pipes)
Inside Zero Rasp, Zero Cabine drone.
Outside a tid little bit louder than stock at higher rpm, a luxury powerful sound vroom vroom.


Performance: It has been a week of excited driving with the butt feel of added power. Finally I took it doing 3 #Dyno pulls. Made 269, 266 & maxed 272whp at end. That a gain of +14rwhp/+15N.m after test pipes compared to 258whp before (with stock secondary cats/resonators). Better is gain occuring all over rpm range.

 

[fourthirteen]

Interesting to see all of the little tweaks adding up. Thanks for taking the time to post these.