ANOTHER supercharger thread/question

Hey all, this is for the techs and know it alls. Ive always toyed with the idea of installing a supercharger on my ride (04 dc trd prerunner v6). But now im beginning to think it may be too late. Nearly 170k. I have nothing invested into this idea but brain power. Im not opposed to picking up a new long block, or one of those jdm motors w/low mileage. But just was curious what some people thought. The motor runs real good at the moment. Ive just always loved the idea of superchargers (damn you mad max!) as always any and all is appreciated

 

I don't have a supercharger on my truck. But have SERIOUSLY considered it.
First, you have 170k miles. Do a compression check to check the health of the piston rings.
Check your oil pressure with a analog gauge to check to see where your oil pressure is and if it is within spec or close to it.
Doing those 2 things will determine if you are past the point of a supercharger.

From my research, installing a supercharger is a piece of cake. Maybe 6-7hr job if you have all the tools and some mechanical know how.

Where the problems starts is, (from my research) the current fuel system is inadequate for the supercharge even at low boost and low load level ( cylinder pressures).
So upgrading the fuel system is a requirement. Upgrading by adding a 7th large fuel injector or by installing larger fuel injectors for each cylinder. Both will require calibration once installed because the Toyota ECM fuel parameters are fairly narrow. A piggy back controller and software is required in order to make the changes as the Toyota ECM doesn't allow direct changes like modern GM, FORD vehicles do.

If you know little about fuel tables and fuel trims, calibrating (tuning), the "new" fuel system may be more of a headache that what the supercharger is worth.

In order to calibrate, you will also need to install a wide band O2 sensor in the exhaust so you can see what AFR that you have at the moment prior to making any changes to the fuel trims and to see what the AFR is when the engine pings at a load and RPM. Next where in the program do you make changes and how much change to make to meet the AFR you want. It gets WAY deeper.
As you can see, installing a supercharger is easy. Keeping it from prematurely destroying your engine is not.

 

Why what, supercharge?

 

Hey thanks for the nice response. Much better then hearing the typical naysayers. If i were to do this i would definitely get the correct parts from the get go, ie 7th injector, ecu piggy back, better fuel pump, blah, blah, blah. I would also do this myself, as im competent enough. i have another car, so stabling the truck wouldn't hurt my commute. Ive been studying superchargers for awhile now, and have read all the stuff you pointed out. Only thing no one has really talked about is installing it on a high mileage motor (not high mileage in my eyes dammit)! So again thanks. And why the other guy asked...because I've always loved superchargers... Ive never been a fan of turbos and turbo lag. Dont get me wrong they both have their pro's and cons, but id prefer instant power, all the time.

PLEASE don't turn this into an argument on which is better. I dont need to hear the banter. Im gonna do what im gonna do..

 

Transmission valve body upgrade if you have in auto.

 

Yeah, i figured as much, about the valve body. So a compression check, and oil pressure check. Anything else to check? Like i mentioned above, ive done my research, however im just curious if this would be a bad plan to install on a somewhat high mileage motor. I know it depends on how good the motor is. But like cd20h suggested about the compression and oil, id like to get opinions on other things to check first.. This isnt one of those stupid "hey how much power will a sc get me" thread. Merely a record of recommendations on what to check for people who have the same situation.

 

I have 210,000 on mine and if I could afford a SC i wouldn't hesitate to put one on....

 

So, for those in the know, what are the correct compression test numbers? What "should" they be?

 

I've installed multiple SCs on my personal trucks, with mileage as follows 198k, 172k, and 135k. Only one did I do fuel upgrades (URD) only because I put a smaller pulley on and wanted to maximize power. I only run 93 octane and over the last 4 years have not had any issues.
There has been some valid points made already with internal engine issues (bad rings, oil pressure, ect), but if you are having those issues you got problems regardless of the SC.
Just wanted to give my 2 cents worth as this has not been the first time I've seen where folks think you MUST have fuel upgrades to SC.
Also, two out of the three where autos with NO valve body upgrade and no problems.

 

Ok, thanks for the input. Its nice to hear i shouldn't have a problem. As for my question about compression numbers, i found the info in my fsm.

Max:174 or more
min:145
no more than 15 between any cylinders.

Regarding tkgn1, sounds reassuring that i may not need to upgrade fuel, valve body, and so on. In my case I'll just do the supercharger and go from there. Now only if i could do it now!