Wow, never heard of that before. Have you looked to see if in fact there are 3? I'll buy a round of beer at the next CO4RJ if you have 3 O2 sensors.

 

lol, yeah I haven't had a chance to look. I have a feeling the guys in the parts dept. don't realize that they are listing sensors for CA spec, and non CA spec vehicles. So it looks like three sensors to them, when really they are just listing all the available sensors for that year 4runner.

and as far as that round of beer goes.. I might just have to weld on a random sensor and tell everyone my truck is 'special'

 

Yeah actually I have 3 O2 sensors, here's the 2 in the front:


The extra one is for a A/F ratio gauge BTW.

 

hahaha, nice! looks like I will need to be you that round of beer

 

I was originally planning on doing the TRD 7th injector kit b/c I was hoping to do it all myself.

Time. . . job. . .

I'm going to outsource this component to an expert who will also help tune the rig (still looking for that guy). Should I return my TRD 7th injector and buy the URD 7th injector?

Should I get a new pump installed? New injectors?

Do I need new spark plugs if I just installed NGK Iridium plugs?

Is there an ECU that will control timing and fuel without having to remap inputs for the main ECU?

d

 

I just read that TRD 7th inj. install note.

Does that mean if I have a FED emissions version (with one cat) that I can't use this kit?

Will this be a valid excuse if I want to return my 7th injector (not installed)?

d

 

I would, if you can, or at the very least get this URD upgrade kit:
http://www.urdusa.com/product_info.p...s_id=110000039

And yes, you need the pump upgrade (very important) and cooler plugs. Are you planning to run the stock SC drive pulley?

 

And... you should search around the site. Dale, Brian and I have walked a LOT of people through this process before. Check this thread for possibly one of the more detailed babbles:

https://www.yotatech.com/forums/f2/speedys-supercharger-thread-111739/

It kinda' starts in the middle of the process, but there are a couple of hijacks in there where we take steps back to the beginning with other folks.


Read. Read. Read.

 

What are the drawback of the URD Fuel Upgrade Kit and the 7th injector?

the benefits are fairly well detailed on the website, but what about some of the problems and limitations?

I read something about people taking out a fuse to reset the ECU for some kind of calibration reason. What's up with that?


I've got a 2000 Ltd (single cat) with NGK iridiums.

d

 

If I get a bigger fuel pump and use the Free FMU, will that suffice? What will that leave out? Where will I be limited?

d

 

David, have you read anything else on this forum? There are a TON of S/C threads all covering this info.

Have you at least found in a link to "Gadget"'s site and read all the info that he has online there about the SC? It's mentioned in most every other SC thread on this or any other Toyota truck forum.


Dude... you HAVE to do some legwork. If you're doing the legwork and are still confused then we'll be happy to help, but from what I see here, you're asking questions that we've answered many times over. You're seemingly not even willing to engage in a _conversation_ about this and toss any acknowledgment about the info you've gotten so far, you just keep firing questions. Saying "Thank you" would go a long way... maybe in your gauges thread too; someone ELSE actually said "thank you" for information that was posted for _YOU_.


Here's a {another} link for you... PLEASE through this site:

http://www.gadgetonline.com/4Run.htm

 

As I understand it the 7th injector kits put the extra fuel in before the Supercharger. I don't see how that could be as effcient as injected straight into the cylinders with the 6 injectors. I've heard some argue the SC bearings may not last as long because of the fuel running throught it, and others argue it could actually be dangeriously explosive in the event of a back fire. I'm not sure I believe one way or another, but these are some of the internet myths anyway. Never heard of one blowing up, but I've seen more than one SC with the bearings toasted. Just saw one thread somewhere around here with bad bearings...search around. Oh yeah, here they were:
http://sea2skytuning.com/index.php?o...d=16&Itemid=33
http://www.customtacos.com/forum/showthread.php?t=88791

 

I've been to gadget's site, and I've lurked around here, but the problem is that everyone seems to think their version is better. Everything's really fragmented, so it's hard to synthesize the different alternatives. I'm wondering if there's a resource that compares all of the different alternatives in a single overview.

-d

 

The thing I think I knew was that depending on how much power you're looking to make, then you could get to a point with the injector sizes that you can't get the motor to idle due to the coarse resolution of the ECU. e.g., I'm running 370's and the idle's choppy, but I need that much size to feed the top end.. but even then, I think my duty cycle up top is pretty long, close to 90%. It's said that 80% is the preferred max, but to do that, I'd have to run 440cc injectors and then the truck basically won't idle at all.

 

How much boost are you running Mark? All I know is at 10 lbs of boost and 318cc injectors, I'm pulling fuel with the FTC to keep it from running too rich. I don't know the duty cycle, but Gadget says its about 80% with his similar setup. I don't understand how you could be at 90% with 370cc injectors. Is there an easy way to measure the duty cycle?

 

I'm at 9.5lbs... The injector size based on HP came from a calculator. This is the one from the WitchHunter site... The math is the same as what I actually used.If you're running good with 318s, there there's something seriously wrong with the theory behind the math. Those calculators were crammed down my throat as gospel when I was going through this a few months ago.

I think I still have smaller injectors around... I wonder...

 

Thanks for the info

Running that calculator with my setup shows I'm at 99% duty cycle. Do you think that's possible?

 

Hmmm... I think it's possible, but I think you'd be burning through injectors if it were happening.

Dang dude, I dunno... Maybe the best gauge is to keep an eye on your A/FR under boost, and be sure that you have the additional capacity to push it another full point (maybe 2 points?) _rich_ past the 11.5/12/12.5:1 that you're running at now. That's probably a "safe" rule-of-thumb.

 

I wonder if the 390cc Lucas Disc Injectors URD has do any better than those 370's you've got Mark... They seem like they might atomize fuel better, which could help with idling and combustion.

 

I'm much richer than that, I'm about 10-10.5 at WOT, I'd like to get it leaner but need more tuning time. I was in the 9s before I started tuning it. I've seen 8s pop up a few times. I do have WI with 50% methanol mix though, so I guess that would make it richer right?