MonkeyWrench Racing HKS SUPERCHARGER KIT � 2GR-FE � CENTRIFUGAL (ROTREX)

Oh No's

Looks like I pulled the plug on this. MonkeyWrench Racing has agreed to remove the supercharger kit off of their V6 RAV4 and sell that kit to me. I wanted something that would be plug-n-play. Their RAV4 is stock, with stock exhaust piping, etc. The intercooler they are removing has already been modified to fit in the RAV4's engine bay so everything will just be a straight-forward install. The intercooler is non-functioning in their RAV4 though. I don't plan on leaving it that way.....ala WRX. I could not pass this up.

I've already discussed the reflashing of an ECU by R9K, despite it not being needed. I may have some adjustments made to fueling (with slightly larger fuel injectors.....from TRD Aurion) and ignition. I am awaiting pricing on installation from my local shop.

So....there it is. I will post more as more info comes, including pics of the kit after it arrives. >

Amazing that you even found this! I'm tuned in for more....

Spy Photos

Here are some early spy photos of the kit on MonkeyWrench's 2006 RAV4 V6.







I asked if they could send me the photos so I can send them to my mechanic and you guys, in case your interested.

Awesome! More photos the better! The guys on ToyotaNation would love to see these as well. I just spilled the beans on one of the threads. Can't post links as I am still new.

The hood scoop your going to do should make a big difference along with the injectors and R9K tune. So exciting!!

Looks like they cut about 5 rows out of the intercooler and welded it back up.

There's no shame in grafting on a Subie WRX hood scoop for the intercooler . . . .:mrgreen:

Teaser video of the same kit for the Vellfire/Alphard.

Here is another source for the supercharger kit.

https://www.nengun.com/hks/gt-supercharger-complete-kit-alphard-veilfire

$2709.29 out the door.

It has arrived



Please be aware that the supercharger kit instructions is in Japanese.

To be continued..........................

Congrats that the kit has arrived. Is your Japanese up to the task of deciphering the instructions? Perhaps the previous owner can be of help. Keep us posted . . .

Oh man! And you described your throttle response as "cartoonish" now.

Your mechanic said you're better off mounting the intercooler up front, right? So, are you going to use the same cooler, or get another one?

Self Note #1

Disregard this post. I post sometimes in my own threads to remind myself of things....for informational purposes. Was thinking about bypassing the intercooler altogether and searched how much heat could be made by the supercharger.

Heat Made By The Supercharger

To See just how much heat is generated by 1 PSI of boost we can use the following formula:

(PR0.28 x Tabs) - Tabs

Where

PR = Pressure Ratio

Tabs = Ambient Temperature on the absolute scale. ( For example on a sunny day in the UK, we could assume 70oF = 70o + 460o = 530o Absolute.)

Another way of expressing this formula would be:

(PR0.28-1) x Tabs

So using this formula we can work out how much 1 psi of boost will raise the temperature at an ambient temperature of 70oF



Note: 14.7psi absolute = Atmospheric pressure at sea level

So we have a figure of 9.857o absolute as an ideal temperature gain for 1 psi at an ambient temperature of 70oF. But this does not take into account the efficiency of the supercharger. So to get the REAL temperature gain, we take the ideal temperature gain divided by the thermal efficiency of the supercharger.

So for a Centrifugal Supercharger such as the Rotrex with a typical thermal efficiency of 75% the Real temperature gain for 1 psi of boost would be:



This is a typical figure to give an idea of the temperatures that can be reached. The Actual temperature gain per psi decreases with boost pressure because of the 0.28 exponent in the formula and the fact that the superchargers efficiency is not linear. For example the temperature gain per psi at 15 psi is about two thirds of the gain at 1 psi boost.

But even taking this into account you can see that with a typical setup producing 10 psi of boost you could easily have a temperature rise in excess of 120oF and that's above what you would see on a normally aspirated engine with all other components being equal.

Click to expand...

From here ~~> Heat made by the supercharger.



Supercharger is an HKS GTS7040 model. Link to the compressor map here ~~> HKS GT Supercharger Specification



The kit does not include the oil needed for the supercharger itself. It is a rotrex type oil (Per Monkeywrench Racing). Manual shows two types in Japanese. Will decipher when I get home and post.

Intercooled vs Non-Intercooled

Still doing research as usual.

Was looking for a chart on intercooled vs Non-Intercooled. Came across this link to info from Corky Bells book called Supercharging ~~> Intercooled vs Non-Intercooled

Since this is a centrifugal supercharger, there is a chart I am looking at on this link. It is very interesting to compare what you'd make at the same boost intercooled vs non-intercooled. Of course $$$ is still trying to convince me to go non-intercooled for now but research tells me hell no. Pretty exciting stuff so I wanted to share. Just in case you may be considering going non-intercooled in any application.

The dyno number may be as low as it is at the Monkeywrench site is because not only is it non-intercooled but it's sitting on top of the engine, absorbing all of the engine's heat. As well as getting the radiator fan heat blown onto it. Making it essentially an inter-heater.

295 at the wheels from a 3.5L supercharged engine is a joke. You can get that pretty much from most modern 2L 4-banger engines out of the factory. I don't mean to be abrasive, I am just trying to bring in some realism here.

There is a lot more to FI tuning than just getting the Air-To-Fuel ratio done. Ignition timing, VVT-i, cooling, fuel pressure, exhaust back pressure, etc play important parts of how an engine runs and makes power. I fear that a simple reflash of the ECU will only get you so far. ...possibly not even half way there.

I don't mean to discourage you. Not at all. I am very curious about this kit myself, but I just don't see all the pieces there yet. I guess my point is that the hardware kit is just the start of this quest and that you should be prepared to invest a lot more time and money chasing issues and problems.

Here are some early spy photos. Will add explanation to pics as the day goes on. The colder spark plugs and the HKS supercharger itself has been installed. No issues from this. My mechanic had to use an app to convert the instructions in the HKS manual from Japanese to English but you can figure out what's what from looking at the picture and trying to translate what you can.

This is an up close picture of the supercharger. It is AN HKS GTS7030 140188 model.




A view of the engine bay looking from the passenger side. You can see that the ECU on the driver's side wall is in a slightly different location. This is to make way for the piping that be routed to the drivers side wheel well and foglight area. The one pipe you see is the piping that goes to the intake manifold. The remaining piping is on it's way and will be fabricated and/or welded to fit. The piping from the intake filter to the supercharger, the supercharger to the intercooler and the intercooler back to the intake manifold will all be going to and coming from the passenger side area. Stay tuned for the finished product.





The supercharger cooler is on top and the transmission cooler (bigger unit) is on the bottom. Was looking to put a front mount intercooler here but there is only about 3" of space between the radiator and the front bumper beam. Also, both of these would have had to be moved to another location. So to keep things simple, it was decided that the intercooler be moved to the driver's side wheel well area.



This is the same top mount intercooler that comes with the HKS supercharger kit. This particular intercooler was already modified to fit Monkeywrench Racing's stock RAV4. So it is a little smaller than the intercooler that comes with the kit. This kit is top mounted (meaning on top of the engine) but heat rises from the engine. And there is no way to get cool air to it on top of the engine (Outside of a hood scoop). So my shop mechanic thought it would be good to put the intercooler in the wheel well area (Inside the mudguard/shield). Toyota Supras have their intercooler situated this way, side mount. See a video example here of the Toyota Supra's side mount intercooler ~~>

There is plenty of space for it in this location and it's easy to mount here. There will be a hole on the backside of the intercooler for the air to go through it and come back out. We talked about two future modifications that could be done once this is finished. He knows of a fan that can be installed the whole width of the intercooler in this location to draw air to it and through it. Also, custom ducting can be made up to isolate the air in this area to force all of it through the intercooler and out the backside. If this route is decided upon in the future, I'll update this thread with information and pics.



Here is just a full shot of the front of the RAV4 with the bumper off. More to come.....


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ETA for this is sometime next week. The Wideband O2 sensor is supposed to come in today and will be installed on the exhaust header that is on the front of the car. It needs to be installed upstream of the catalytic converter to work properly. The exhaust header coming down near the firewall has the cat converter right off the exhaust manifold so this seems like the best place to put this wideband at for now. It's just a tool to use. Ideally, you want to measure the combined O2 coming from all the six cylinders but before the cat converters. This will have to do.

Also, the HKS supercharger kit has the maf sensor installed between the air filter and the supercharger. This does measure the intake air temperature that is benig pulled through the air filter however my mechanic and I agreed that the most ideal location for the maf sensor would be between the intercooler and the intake manifold. This way, you are measuring the air that is entering your engine, since this air is being heated up by the supercharger then cooled by the intercooler. I was considered that the reading of the maf and the maf sensor itself could be affected by the boost pressure from the supercharger but my mechanic doesn't think that is a concern. So, this will be another modification from what you typically see.

And thanks again to Moondogg and Techsmrt for their intake insulation for cooler temp posts in another thread. The piping from the supercharger to the intercooler will be insulated. I will be considering insulating both the intake to the supercharger as well as the piping from the outlet of the intercooler to the engine.

And lastly, R9K has just finished the first reflash of the ECU for supercharger duties. This will be swapped back in and installed when the supercharger kit is ready. I can drive with the ECU that is in there now but the R9K ECU tuning is being modified to support the kit. It's in beta so it may have to be tweaked a little depending on what data I am able to get from running with the kit.


That's all for now. :wink

MonkeyWrench Racing HKS SUPERCHARGER KIT – 2GR-FE – CENTRIFUGAL (ROTREX)

[emoji857]drool!! Soo jealous!!

Will be the intercooler be functional below the headlight? What was the determining factor to it location?

Can't imagine what actual aftermarket fitted Rav4 V6 4WD headers would do with this? I got under my RAV4 and found out why the Gouky headers do not work with our set up.



That's a side view of the headers and cat sweeping back over the rear drive shaft. It shoots back the down and around the drive axle meeting with the front bank and joining into a rear cat.



Not pretty...

Myxalplyx, your build is coming along B-E-A-UTIFULLY, and fast! I really like the side mount intercooler as it lets you keep your sleeper status.What kind of tubing is your mechanic using for the intake tubes? Will you still have a somewhat tapered design?

Teksmrt, the stock Manifold/cat combo can honestly handle a lot of ehayst flow. Its the same design is used for the supercharged Toyota Aurion and it makes 60 hp more horsepower. However, there are a lot of restrictions to remove after the first 2 cats. A lot of the Camry guys start by deleting the 3rd cat and resonator. Then there's straight-thru mufflers and bigger piping. Or you can be like Myx and replace everything after the cats and run true dual exhaust.

Updates!? Any more photos or videos?

You have more patience than I do..

Very interesting thread!


A few years ago, I swapped a 2.7L Tacoma engine in my old AE86 Corolla. I later installed a TRD supercharger boosting 10 PSI. Because the S/C was taking place of the intake manifold, the throttle-body was mounted before the S/C. So there was no possibility to install a conventionnal intercooler. So I used water-meth injection to cool the air intake charge. The water-meth mist was passing through the rotors to mix perfectly with the air intake. It made a considerable difference. After some hard pulls, the S/C temp lowered an average of 22-23C (71-73F).

You're going to need to start another thread concerning your swapped AE86! I'd like to know a bit more about it.

How fast did it run? Before supercharger? After meth was added? (1/4 mile)

Any updates...? The anticipation is palpable, and its not even my ride. ?

[emoji12]Drool!!


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