Ordered the Magnuson SC from URD. No Plans for the 2.2 Pulley, do I "need" the 7th Injector kit?

Hey guys, as the title states..

I went ahead and ordered both the Super Charger and the 7th injector kit from Gadget yesterday for my 03 Tacoma. However, I'm reading a few conflicting thoughts on whether or not I actually need the 7th injector with just the Super Charger (no smaller pulley).

I'm not in the mood to "tune" anything, just want to plug and play. Meaning, bolt up the Super Charger and go. I ordered the 7th injector as I thought I read somewhere that I needed it with the SC. Then I read somewhere that I only need the 7th injector if I go with the smaller 2.2 pulley.

1) Can I run just the SC without the 7th injector and no other mods? (I'm at sea level)
2) If I DO have to install the 7th injector, can I just install it and drive? I'm not in the mood to "tune" anything. I see the tuning requires a laptop, which I don't have.

Can someone who has experience with the SC on their 1st gen chime in?

Back in 1999 I had a brand new Tacoma and had a 1st gen SC installed at the dealer with no other modifications and it ran fine so long as I ran 91 octane. So I'm just a little confused as far as what I need.

Thank you in advance!

 

Some 3.4l v6's have lean issues with the stock supercharger setup and benefit from the 7th injector kit while others run like a top without it and only need it if they are upgrading the pulley system. No real way of knowing until you install the supercharger and see how it runs. Me personally, I got my truck with the TRD supercharger already installed (no other SC mods) and it pinged like crazy under boost (I always run 91 octane), so I eventually added the 7th injector kit and it got rid of most of my lean issues.

If you can swing it, running the 7th injector is a good idea either way in my opinion. It's added peace of mind and it won't hurt anything (other than maybe making it harder to pass a smog test since it's technically not street legal for CA). Supplies more fuel to the system and has the added benefit of cooling the intake with the fuel spray (it's not as good at doing this as a methanol injection setup is but it helps). Plus if you ever do decide to upgrade to a smaller pulley, you'll already have the 7th installed.

I had my kit installed with no additional tuning and it runs great. I still do get slight pinging under heavy load/boost especially if my AC is on for some weird reason, but it's 10x better than it was before I had the kit installed. One of these days I'll look into custom tuning it a bit to see if I can get it to run even better, but I'm happy for now.

Remember, you also want to run 2 step cooler spark plugs with the supercharger. The 7th injector kit comes with those as well as an upgraded hi-flow fuel pump, which is a big plus.

As for the smog test issue, I haven't had to get my truck tested since I installed the kit but from what I've researched, most people haven't had any problem getting smogged. Either most techs don't really care or won't recognize it as a modification. Keep the piggyback ECU for the 7th injector hidden somewhere in the cab, mine's mounted behind my glovebox.

 

Agree with everything said above. I bought my SC through URD as well, installed the 7th injector kit and haven't needed to do any tuning with it. It will help the SC reach its full potential and virtually eliminate any possible damage caused by lean conditions or spark detonation.

 

Thank you for your input. Interesting how some run fine without the 7th injector and some don't. I wonder what the driver is for this variation between the exact same vehicles. Do you think the elevation where the truck is driven is the cause?

So basically, the truck will likely pass smog on paper, it's just up to the the visual from the smog technician...got it. Good point about getting the smaller pulley down the line and already having the 7th injector installed. I debated the smaller pulley, but it's anodized bright red and if that's not a flag for the smog tech, I don't know what is! Wonder if URD makes the 2.2 pulley in black?

That's the part I'm not too familiar with, the tuning. I know I can install the charger and even the 7th injector stuff, but when it comes to plugging things in and messing with fuel maps, I'm a bit green and wouldn't be confident enough to NOT screw things up.


Looking over the install paperwork for the 7th injector is a little overwhelming to be honest. I was hoping to not have to use it, guess I'll just have to test drive the truck after the SC install and go from there. If I do want to install that 7th injector and associated parts, the lifting of the bed and removal of the pump from the tank is what has me dreading the install. That sounds like a royal PITA.

Thank you for the response, this is exactly what I wanted to hear.
I will report back (if anyone cares) my experience with the install and how the truck runs at sea level.

Side question. If for some crazy reason I DO need to tune it. Will I have to buy URD's tuning kit on top of the 7th injector?

 

Elevation definitely plays a factor...I'm relatively close to sea level though and still got wicked pinging on the stock setup so there's got to be other factors at play that I'm not really aware of.

Yeah the truck should pass the smog on paper just fine, the problem is that the 7th injector kit isn't CARB certified and any modifications you make in CA that effect emissions that haven't been certified will fail the visual inspection. It's dumb because essentially all you need to do to become CARB certified is pay the state a buttload of cash, but it is what it is. I believe URD makes a smaller "stealth" pulley that looks just like the stock one so it's easier to pass the visual inspection (it's black and has most of the same serial numbers on it if I recall correctly).

I had a local member on here do the 7th install for me, including the fuel pump which was the most time consuming aspect of the kit according to him.

I'm not really familiar with how to tune the 7th, that's something I've never been very clear on. Not sure if you need a separate URD kit or not. I know guys on here have done it though, I think @Blackdawg and @TashcomerTexas may have?

 

Just put the supercharger on and make sure you have 91 octane and see how it runs.
Hopefully your lucky and will not need the 7th injection kit. A shop will probably charge you 1000 just
to install the kit and a fuel pump, with the added kit price the price gets up there fast if you cannot do it yourself.
You should take a poll from people at sea level if they need or are using a 7th injector with the standard pulley

 

being at sea level you'll definitely need the 7th.

The closer you are to sea level the more air there is. and the more boost you make. 1000' kills about 1psi of boost.

It is supposed to be plug n play, but not always. You can tune it though.

there isn't really such a thing as plug n play for anything boost.

AEM FIC6 is a better option now with bigger injectors.

 

Hey, any chance I could get a ride in your truck? I'm seriously considering the URD kit.

 

Installing the fuel pump is easy, if you can do the rest of the install yourself it will be no problem. Six bolts to lift the bed, then unbolt the fuel pump assembly from the tank, take the old pump off, trim the hard line per the instructions and pop the new one on there.

Gadget will send you a copy of the R4 tuning software for free, it's an old school windows based tuning program that is pretty easy to use. I doubt you will need to do anything to the 7th though, the stock map it comes with has 99% of the tune you need built into it. If you start getting crazy with 2" pulleys then you'll need to do additional tuning.

 

Run a wideband like aem or such so you know your true afr and go from there

You'd be surprise at how many guys say their afr is fine to find out they're cruising at 16 and part throttle above 18.

Let's put it this way:
More air flow + NO fuel management = disaster
More air flow + fuel management = healthy, longer engine life span

 

Yeah, Gadget mentioned that from stock the 7th injector kit is plug and play for 99.9% of the trucks right out of the box. Maybe I'll try to find someone here in CA who might be able to help me with the tune if it comes down to that. I wouldn't even know where to start when messing with A/F ratios. Oh and I also don't have a Laptop which I'm assuming I would need.

 

Sure, no problem, Can give u run up Flyod hill too show u it's pulling power
and coming down shown you how well greenstuff works,
What setup do you have now? Supercharger wise?

 

My Taco doesn't have a supercharger, hence my curiosity!

 

the difference is amazing, trust me, Floyd Hill would be good place to show u.
Pm me if u want

 

You will 100% need some type of fueling modification. Efficacy aside, the 7th injector is the least maintenance of all the choices IMO. The install is pretty simple, even the fuel pump. Should take around 6 hours at a cautious pace. If you don't want to tune at all the 7th is the best choice but you will likely want to get a base tune initially on the computer. You could probably find someone local whom is familiar with the SC/7th setup and will do it for you for a bill or two. If you want to get largest gain and the safest tune you will want to get an AFR gage as well.

 

Is the AFR gauge used during the tune only (a one time use sorta thing) or will I benefit from the gauge being installed all the time?
Forgive my ignorance on this matter.

If the AFR gauge is a one time tune thing, I'll probably just look for someone local who has one and can help me out.
I don't mind paying for a nice tune

 

@indetrucks where in SoCal are you? If you're around the LA area let me know, the guy on here that did mine for me may do your's as well. I'll PM you

You want an AFR gauge in your truck along with a boost gauge...knowing you're air fuel ratio is important. It will let you know how well your setup is running, or not running. Just because you aren't pinging doesn't mean you don't have a bad AFR. It'll also let you know whether you should tune the 7th further or not. The afr can change depending on many variables so it's good to have a gauge for one so you can check it out whenever you want.

 

Thanks and yea, I would love to get in contact with someone who can help me dial it in once the SC and 7th injector is installed. I'm in Torrance

As far as the AFR gauge, once the truck is dialed in do I really need it any further past the initial tuning?
I had a boost gauge in my 99 way back in... well 1999 and it was neat to see the boost, but after a while I just stopped looking at it because it was always reading the same. Suppose it's a nice to know. I had it mounted on the pillar, I assume they still sell a pillar gauge pod for our SC'd Tacoma's?
*EDIT* found the dual gauge pod from Lotek

Appreciate the help!

 

It's the only way to properly tune the engine. You could say it's "one-off" item but because of the way it's installed it's more beneficial/easy to just leave it on once you have it and it's also nice to have in order to keep an eye on things. A tuning shop will have an external device which reads afrs from the exhaust tip. It is less accurate than a properly installed wideband 02 sensor but it will get the job done.

If you're a really apt driver and like to keep track of things it will definitely be nice to have. You can control you're mpgs well using one as well and knowing when your engine is actually spraying fuel and when it's not.

I'm using the Lotek dual pod now and it's pretty slick.

 

I ran without one as well for the 1st year I had my truck, looking back I really wish I hadn't. I knew my AFR was bad from the horrible pinging I was getting under certain loads. I monitor it know through the Torque app on my phone whenever I'm curious about it (bluetooth OBDII connector + Torque app was only about 25 bucks). It's worth the peace of mind.