FattyCBR

I just sent some injectors off to get cleaned. These are the later model Toyota/Lexus blue top injectors with air injection ports. 3 flowed 316cc and 3 flowed 320 cc. They are part number 23250-46050 in case anyone is interested. I originally was planning on using some redtops I had (non-air injection, but when I found these I figured it would not be a bad idea to continue to use the built in air injection system.

At the bottom is a picture of the injectors spraying, originally I wanted the picture to be of the air injection vs. the non-air injection, but the shop did not have any of the redtops in stock. Hopefully next time someone has some redtops sent off for cleaning they will ask for a picture of their spray pattern. This would help clear up which has a better spray pattern. I will be installing these this weekend.

http://community.webshots.com/photo/...69713908VXOyhK

juicyfruity

Interresting...

I'm also using the same blue tops in my Tacoma. I had one flow test at Rc Eng. to confirm it was a 305cc. The result was 302cc at 43#. But It wasn't cleaned before the test. I only had them cleaned after installation through a fuel injector cleaner aerosol bottle attached to the rail.

So this is good news since they seem to flow a little more than 305cc.

One thing that puzzles me is the fact that to bring my Long term fuel trim near 0, my low throttle setting has to be at -6. But I'm also at sea level.

2000 federal
stock maf
injen
gibson

can you post your altitude, year, mods and low throttle settings when you install them?

FattyCBR

Sure I'll post my AFR numbers (I'm using the HKS S-AFR) but I will also be using the Supra MAF so I'm not sure if we'll be directly comparable. Incidentally which rubber seals and o-rings are you using on the injectors?

Thanks

juicyfruity

You have to use all of them. It fits perfectly!!!

so from top of the injector to bottom:

O-ring
small "Hour Glass" grommet
Large "Hour Glass" grommet
O-ring

Be very carefull when poping in the new injectors. You should lube the o-rings with GAS ONLY!

Make sure you install the injector in the rail first with a gentle push and twist motion. Wiggle the injectors to make sure the O-Ring inside the rail is properly seated.

You can then install the rail with the injectors in it, in the manifold.

FattyCBR

For the "bottom hour glass grommet" which one did you use, the one from the stock injector or the one from the blue top injector?

juicyfruity

I think they're the same size. I used the ones from the blue injectors. Just use the ones that has the best shape/condition.

FattyCBR

Cool, thanks for the info.

juicyfruity

welcome!

ravencr

Good deal Milan!

What's funny is that I'm running the 370cc injectors with double o-rings at the top and bottom in addition to the large rubber grommet from the old injectors.

I would highly recommend buying some additional toyota o-rings, because I had leaking problems at first, and had to replace some of them, which is a pain because you have to take everything apart again.

What's also wierd is that I'm in the positive numbers on the analog fuel map when running the 370cc injectors. I'm not having to lean out at all, and I'm pretty close to having my LTF trim at zero while in non-boost conditions. I haven't tuned in the boost too much yet, but Gadget recommends that I get the SS ESC1 so I can trigger the ECU into Open loop while in boost, because the SMT-6 doesn't know or can't do it.

Let me know how it goes man!

Chris

FattyCBR

Interesting, the only problem I see with this is under partial throttle conditions boost is variable (in other words not 0 psi or 7 psi, it can be in between) so the only way I see to tune safely in this case is in closed loop, which the esc disables. On the other hand at WOT above ~3500 you know you will be in max boost at all times so you can tune in open loop. That's just my take on safe tuning, but I may be wrong about the esc. I guess someone will have to tune that way and show it works using logs.

ravencr

Well, I didn't way everything Gadget had said, but you really need to have a Wide band O2, which I dont have and I know you have. With the ESC1 while in boost, you can tune an exact or close to exact mixture rather than having the computer triggered to realter the adjusted signal back to 14.7:1. Because while in open loop it doesn't do that.

Chris

FattyCBR

Well if you can make a 3d map of MAF voltage (used as a proxy for boost) vs rpms it sounds like it's doable. I'd do it with a WB O2 sensor for safety though.

Good luck.